Attachment A - WSR-88D System Specification.pdf
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This document is a comprehensive technical specification for the Weather Surveillance Radar-1988 Doppler (WSR-88D) System, a critical weather radar infrastructure developed and maintained by the Department of Commerce, Department of Defense, and Department of Transportation. The specification details the technical requirements, performance characteristics, and functional capabilities of the radar system, which is designed to detect, process, and distribute weather information to support meteorological, aviation, and national defense missions.
The specification covers extensive technical parameters including system configuration, radar data acquisition, product generation, environmental conditions, reliability standards, and scanning strategies. Key capabilities include generating multiple radar products such as reflectivity, velocity, storm tracking, precipitation accumulation, and alert messaging across various elevation angles and coverage ranges. The document outlines rigorous performance requirements including operational availability goals of 0.960, mean time between failures, and specific technical specifications for radar components like antenna performance, transmitter characteristics, signal processing, and environmental resilience. The specification serves as a comprehensive technical reference for maintaining and potentially upgrading the NEXRAD (Next Generation Weather Radar) system, which is crucial for detecting severe weather phenomena like tornadoes, hurricanes, and floods.
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Document Number 2810000J Code Identification 0WY55
WSR-88D ROC
24 December 2014
WSR-88D SYSTEM SPECIFICATION
Prepared by the WSR-88D Radar Operations Center
Attachment A
WSR-88D ROC
24 December 2014
ISSUE DATES FOR REVISIONS TO WSR-88D SYSTEM SPECIFICATION
10 September 1982, R400-SP101 (System Definition Phase) 11 May 1983, R400-SP202 (Validation Phase, Part 1) 15 May 1984, R400A-SP202 (Validation Phase, Part 2) 15 November 1984, R400A-SP203 (Validation Phase, Part 2 Update) 1 January 1986, R400-SP301 (Limited Production Phase) 1 November 1991, R400-SP401A (Full Scale Production Phase)
The following Changes were incorporated in Revision 2810000J
9 April 1986, R400-SP301 (Change 1) 2 December 1986, R400-SP301 (Change 2) 24 March 1987, R400-SP301 (Change 3) 1 May 1987, R400-SP301 (Change 4) 1 June 1991, R400-SP401 (Draft) 1 November 1991, R400-SP401A 1 July 1995, 2810000, Revision - 1 September 1996, 2810000, Revision A, Build 9.0 This revision incorporates Build 9.0 software changes.
5 November 1996, INT2810000, Revision B, (Draft) This revision migrates the WSR-88D to Open Systems.
30 April 1997, INT2810000, Interim Revision B, (2nd Draft) 18 November 1997, INT2810000, Interim Revision B, (3rd Draft) 29 June 2000, 2810000, Revision B, Build 10.0 and Open RPG Build 1.0 04 May 2001, 2810000, Revision C, Open RDA Build 1.0 31 October 2001, 2810000, Revision D, Open RDA Build 1.0 19 September 2002, 2810000, Revision E, Open RDA Build 1.0 28 April 2006, 2810000, Revision F, Open RDA Build 1.0 and RPG Builds 1.2, 2.0, 3.0, 4.0, 5.0, 6.0 and 7.0 18 May 2007, 2810000, Revision G, Super Resolution and RPG Builds 8.0, 9.0 and 10.0 25 April 2008, Revision H, Dual Polarization 25 March 2012, Revision I, General Updates 28 March 2012, UPDATE WSR-88D SYSTEM SPECIFICATION TO REVISION I Brings SS up to date by incorporating newly approved requirements.
07 January 2015, Revision J, General Updates and RMA Rev J Change History: CCRs 06-00096, 11-00053, 12-00008, 11-00126, 12-00052, 13-00056, 10-00082, 10-00083, 10-00077, 10-00104, NA09-00050; ECPs 0554, 0420
Single copies available from:
WSR-88D Radar Operations Center (ROC) 1313 Halley Circle Norman, OK 73069
R-1
WSR-88D SYSTEM SPECIFICATION
2810000J
REVISION RECORD
REVISION - A INT B INT B
(2nd
Draft)
INT B
(3rd
Draft)
B C D E F G H I
J
RELEASED
BY
ROC ROC ROC ROC ROC ROC ROC ROC ROC ROC ROC ROC ROC ROC
RELEASE
DATE
07/01/95 09/01/96 11/05/96 04/30/97 11/18/97 6/29/00 5/04/01 10/31/01 09/19/02 04/28/06 05/18/07 4/25/08 04/25/2010 12/24/2014
EFFECTIVITY 07/01/95 09/01/96 - - - 6/29/00 5/04/01 10/31/01 09/19/02 04/28/06 5/18/07 4/25/08 04/25/2010 12/24/2014
AUTHORITY F0013 F0048 ORPG ORPG ORPG F0141 F0151 F0151
R1 F0141
R1
F0151 R2
F0164 F0294 F0332 F0388 0648F
FAST TRACK NO NO NO NO NO NO NO NO NO NO NO NO NO NO
REV
HISTORY
BLD 8.0 BLD 9.0 BLD
10.0
OPEN
1.0
BLD
10.0
OPEN
1.0
BLD 10.0
ORPG
OPEN 1.0
BLD 10.0
ORPG
Open 1.0
ORDA
Open 1.0
ORDA
Open 1.0
ORDA
Open 1.0
ORDA 1.0
and RPG
Blds 1.2, 2.0, 3.0, 4.0, 5.0,
6.0 and 7.0
RPG Blds 8.0, 9.0 and 10.0
RPG &
RDA
General Updates
General Updates and RMA
SECTION 1 - A INT B INT B INT B B C C
SECTION 2 - A INT B INT B INT B B C D F G I J
SECTION 3 - A INT B INT B INT B B C D E F G H I J
SECTION 4 - A INT B INT B INT B B B D H
Appendix A - A Deleted Deleted Deleted Deleted Deleted Deleted Appendix B - A INT B INT B INT B B C D E F G H J Appendix C - A INT B INT B INT B Deleted Deleted Deleted Appendix D - A INT B INT B INT B B B B F G J Appendix E - A INT B INT B INT B B B B F G H I J Appendix F - A Deleted Deleted Deleted Deleted Deleted Deleted Appendix G - A INT B INT B INT B B C D F J Appendix H - A INT B INT B INT B B B B F Appendix I - A INT B INT B INT B B B B E F G J Appendix J - A INT B INT B INT B B B B I Appendix K - A INT B INT B INT B B B B F G Appendix L - A Deleted Deleted Deleted B Deleted Deleted Appendix M - A Deleted Deleted Deleted B Deleted Deleted Annex A NONE 1.0 2.0 2.0 2.0 2.1 Deleted Deleted i
TABLE OF CONTENTS
1 SCOPE ............................................................................................................................................ 1-1 2 APPLICABLE DOCUMENTS ...................................................................................................... 2-1
2.1 Government Documents ............................................................................................................ 2-1
2.1.1 Military Standards and Handbooks .................................................................................. 2-1
2.1.2 Federal Documents ............................................................................................................. 2-2
2.2 Non-Government Documents .................................................................................................... 2-4
2.2.1 American National Standards Institute (ANSI) Standards ............................................ 2-4
2.2.2 Telecommunications Industry Association/Electronics Industries (TIA/EIA) Standards ........................................................................................................................................... 2-4
2.2.3 Other Non-Government Documents .................................................................................. 2-4
2.3 Precedence of Documents .......................................................................................................... 2-5 3 REQUIREMENTS ......................................................................................................................... 3-1
3.1 System Definition ....................................................................................................................... 3-1
3.1.1 General Description ............................................................................................................ 3-1
3.1.1.1 System Users ............................................................................................................... 3-1
3.1.1.1.1 Principal Users ......................................................................................................... 3-1
3.1.1.1.1.1 Department of Commerce ................................................................................. 3-1
3.1.1.1.1.2 Department of Defense ..................................................................................... 3-1
3.1.1.1.1.3 Department of Transportation ......................................................................... 3-1
3.1.1.1.2 Other Users .............................................................................................................. 3-2
3.1.1.2 Product Types .............................................................................................................. 3-2
3.1.1.2.1 Base Data ................................................................................................................. 3-2
3.1.1.2.2 Radar Products ......................................................................................................... 3-2
3.1.1.3 Product Distribution .................................................................................................... 3-2
3.1.1.3.1 Principal User Product Distribution ....................................................................... 3-2
3.1.1.3.1.1 NWS Local Sites ................................................................................................ 3-2
3.1.1.3.1.2 NWS National and Regional Sites ................................................................... 3-3
3.1.1.3.1.3 DoD Local Sites ................................................................................................. 3-3
3.1.1.3.1.4 DoD National Facility and Regional Centers .................................................. 3-3
3.1.1.3.1.5 DOT Facilities .................................................................................................... 3-3
3.1.1.3.2 Other User Products ................................................................................................ 3-3
3.1.1.4 Principal User Processing and Display ...................................................................... 3-3
3.1.1.5 Radar Siting ................................................................................................................. 3-4
3.1.1.6 Support Facilities ........................................................................................................ 3-4
3.1.1.6.1 Maintenance and Supply Depots ............................................................................ 3-4
3.1.1.6.2 Maintenance Training Facilities ............................................................................. 3-4
3.1.1.6.3 Operational Training Facilities ............................................................................... 3-4
3.1.1.6.4 Radar Operations Center ........................................................................................ 3-4
3.1.1.7 Functional Areas.......................................................................................................... 3-5
3.1.1.7.1 Radar Data Acquisition ........................................................................................... 3-6
3.1.1.7.2 Radar Product Generation....................................................................................... 3-6
3.1.1.7.3 Principal User Processing........................................................................................ 3-6
3.1.1.7.4 Facilities ................................................................................................................... 3-6
3.1.1.7.5 Support ..................................................................................................................... 3-6
3.1.2 Missions ............................................................................................................................... 3-6
3.1.2.1 Department of Commerce Missions............................................................................ 3-6
3.1.2.2 Department of Defense Missions ................................................................................ 3-7
3.1.2.3 Department of Transportation Missions .................................................................... 3-7
3.1.2.4 System Mission ............................................................................................................ 3-7 ii
3.1.3 System Diagrams ................................................................................................................ 3-7
3.1.4 User Interfaces .................................................................................................................... 3-9
3.2 System Characteristics ............................................................................................................ 3-11
3.2.1 Performance Characteristics ............................................................................................ 3-11
3.2.1.1 WSR-88D Full Load ................................................................................................... 3-11
3.2.1.2 Peak Request Rates ................................................................................................... 3-12
3.2.1.3 Response Time Requirements ................................................................................... 3-12
3.2.1.3.1 Deleted .................................................................................................................... 3-13
3.2.1.3.2 Off-Center/Preset Center ....................................................................................... 3-13
3.2.1.3.3 Resolution Change ................................................................................................. 3-13
3.2.1.3.4 Display Annotation ................................................................................................ 3-13
3.2.1.3.5 Display of Cursor Coordinates .............................................................................. 3-13
3.2.1.3.6 Cursor Home .......................................................................................................... 3-13
3.2.1.3.7 Test Pattern Selection/Deselection ....................................................................... 3-13
3.2.1.3.8 Status Message Display ......................................................................................... 3-13
3.2.1.3.9 Alarm/Alert Output/Display .................................................................................. 3-14
3.2.1.3.10 Power Fail Recovery............................................................................................... 3-14
3.2.1.3.11 Magnification .......................................................................................................... 3-14
3.2.1.3.12 Time Lapse Display ............................................................................................... 3-14
3.2.1.3.13 Master Cursor Function ........................................................................................ 3-14
3.2.1.3.14 Hard Copy Generation ........................................................................................... 3-14
3.2.1.3.15 Startup/Restart ...................................................................................................... 3-14
3.2.1.3.16 Engine Generator Online ...................................................................................... 3-14
3.2.1.3.17 FAA Redundant Channel Switchover ................................................................... 3-15
3.2.1.4 Unit Throughput ........................................................................................................ 3-15
3.2.1.5 Configuration ............................................................................................................. 3-15
3.2.1.5.1 FAA Redundant Configuration ............................................................................. 3-15
3.2.1.5.2 NWS Redundant Configuration ............................................................................ 3-16
3.2.1.6 Data Processing Reserve ........................................................................................... 3-17
3.2.1.7 Expandability ............................................................................................................. 3-17
3.2.1.7.1 RPG Expandability ................................................................................................ 3-18
3.2.1.7.2 PUP (Collocated and Non-Collocated) Expandability ......................................... 3-18
3.2.1.7.3 RDA Expandability ................................................................................................ 3-18
3.2.1.8 Removable Storage .................................................................................................... 3-18
3.2.1.8.1 RPG Expandability ................................................................................................ 3-18
3.2.1.8.2 RDA Expandability ................................................................................................ 3-18
3.2.2 Physical Characteristics ................................................................................................... 3-18
3.2.3 Reliability .......................................................................................................................... 3-18
3.2.4 Maintainability ................................................................................................................. 3-19
3.2.4.1 Corrective Maintenance ............................................................................................ 3-19
3.2.4.1.1 Functional Area Mean-Time-To-Repair (MTTR) ................................................. 3-20
3.2.4.2 Preventive Maintenance ........................................................................................... 3-20
3.2.5 Availability ........................................................................................................................ 3-21
3.2.5.1 Operational Availability (Ao) .................................................................................... 3-22
3.2.5.2 Service Availability (As) ............................................................................................ 3-23
3.2.5.3 Inherent Availability (Ai) .......................................................................................... 3-23
3.2.5.4 Achieved Availability (Aa) ......................................................................................... 3-24
3.2.6 Environmental Conditions ............................................................................................... 3-26
3.2.6.1 Temperature and Humidity ...................................................................................... 3-27
3.2.6.2 Pressure and Altitude ............................................................................................... 3-27
3.2.6.3 Solar Radiation .......................................................................................................... 3-27 iii
3.2.6.4 Rainfall ....................................................................................................................... 3-27
3.2.6.5 Fungus ........................................................................................................................ 3-28
3.2.6.6 Salt Fog ...................................................................................................................... 3-28
3.2.6.7 Sand and Dust ........................................................................................................... 3-28
3.2.6.8 Wind ........................................................................................................................... 3-28
3.2.6.9 Snow and Ice Load ..................................................................................................... 3-28
3.2.6.10 Lightning (Transient Susceptibility) ........................................................................ 3-28
3.2.6.11 Lightning Protection.................................................................................................. 3-28
3.2.6.12 Electromagnetic Compatibility (EMC), Electromagnetic Interference (EMI) and Radio Frequency Interference (RFI) ................................................................................... 3-29
3.2.6.12.1 Emissions (Conducted) .......................................................................................... 3-29
3.2.6.12.2 Emissions (Radiated) ............................................................................................. 3-29
3.2.6.12.3 Susceptibility (Conducted) ..................................................................................... 3-29
3.2.6.12.4 Susceptibility (Radiated) ....................................................................................... 3-30
3.2.6.12.5 Reference Test Data ............................................................................................... 3-30
3.2.7 Transportability ................................................................................................................ 3-30
3.3 Design and Construction Requirements ................................................................................. 3-30
3.3.1 Materials, Processes, and Parts ....................................................................................... 3-31
3.3.1.1 Trade Practices and Non-specified Processes and Materials ................................. 3-31
3.3.1.2 Selection of Electrical and Mechanical Parts .......................................................... 3-31
3.3.1.3 Part Limits and Ratings (Electrical and Mechanical) ............................................. 3-31
3.3.1.4 Mechanical Design ..................................................................................................... 3-32
3.3.1.5 Toxic, Hazardous Substances, and Ozone Depleting Chemicals ............................ 3-32
3.3.1.6 Recycled, Recovered, or Environmentally Preferable Materials ............................ 3-32
3.3.1.7 Use of Corrosion Resistant Parts.............................................................................. 3-32
3.3.2 Electromagnetic Radiation ............................................................................................... 3-33
3.3.3 Nameplates and Product Markings ................................................................................. 3-33
3.3.4 Workmanship .................................................................................................................... 3-33
3.3.5 Interchangeability ............................................................................................................. 3-33
3.3.6 Safety ................................................................................................................................. 3-33
3.3.7 Human Performance/Human Engineering ..................................................................... 3-33
3.3.7.1 Acoustic Noise Requirements ................................................................................... 3-34
3.3.7.1.1 Equipment Accessed by Maintenance Personnel Only ........................................ 3-34
3.3.7.1.2 Equipment in Areas Occupied by Operational Personnel ................................... 3-34
3.3.7.1.3 Acoustic Noise Limits ............................................................................................ 3-34
3.3.7.2 Heating Requirements .............................................................................................. 3-34
3.3.8 Computer Software ........................................................................................................... 3-35
3.3.8.1 Software Portability .................................................................................................. 3-35
3.3.8.2 Database Requirements ............................................................................................ 3-36
3.3.8.3 Extensibility ............................................................................................................... 3-36
3.3.8.3.1 Application Programming Interface (API) ........................................................... 3-36
3.3.8.3.2 Software Modularity .............................................................................................. 3-36
3.3.8.4 Expandability ............................................................................................................. 3-36
3.3.9 Firmware ........................................................................................................................... 3-36
3.3.10 Flexibility and Scalability Requirements ........................................................................ 3-36
3.4 Logistics .................................................................................................................................... 3-37
3.4.1 Maintenance/Logistics Concept ....................................................................................... 3-37
3.4.1.1 Calibration ................................................................................................................. 3-37
3.4.1.2 Maintenance Environment ....................................................................................... 3-37
3.4.1.3 Depot Maintenance .................................................................................................... 3-37
3.4.1.4 Supportability ............................................................................................................ 3-37 iv
3.4.2 Personnel Skill Level ........................................................................................................ 3-38
3.4.2.1 Maintenance Personnel ............................................................................................. 3-38
3.4.2.2 Operations Personnel ................................................................................................ 3-38
3.4.3 Supply ................................................................................................................................ 3-38
3.5 Training .................................................................................................................................... 3-38
3.5.1 Maintenance Training ...................................................................................................... 3-38
3.5.2 Operations Training ......................................................................................................... 3-38
3.6 Intentionally Left Blank .......................................................................................................... 3-38
3.7 Functional Area Characteristics ............................................................................................. 3-40
3.7.1 System Requirements ....................................................................................................... 3-42
3.7.1.1 Data Quality .............................................................................................................. 3-42
3.7.1.1.1 Range Unfolding ..................................................................................................... 3-42
3.7.1.1.2 Velocity Dealiasing ................................................................................................ 3-42
3.7.1.2 Pulse Repetition Frequency Selection ...................................................................... 3-42
3.7.1.3 Level II ....................................................................................................................... 3-43
3.7.1.3.1 Level II Interface Connection ................................................................................ 3-43
3.7.1.3.2 Level II Equipment Data Distribution ................................................................. 3-43
3.7.1.4 Power Failure Recovery ............................................................................................ 3-43
3.7.1.5 Overload Control ........................................................................................................ 3-43
3.7.1.5.1 Processing Overload Control ................................................................................. 3-43
3.7.1.6 Master System Control Function (MSCF) ............................................................... 3-43
3.7.1.6.1 General Requirements ........................................................................................... 3-43
3.7.1.6.1.1 Access Controls ................................................................................................ 3-44
3.7.1.6.1.2 Operator Commands ....................................................................................... 3-44
3.7.1.6.2 Overload Status and Control ................................................................................. 3-44
3.7.1.6.3 Status Monitoring .................................................................................................. 3-44
3.7.1.6.3.1 Radar Status Monitoring ................................................................................ 3-45
3.7.1.6.3.2 System Status Monitoring .............................................................................. 3-45
3.7.1.6.4 System Control ....................................................................................................... 3-46
3.7.1.6.4.1 RPG Startup .................................................................................................... 3-46
3.7.1.6.4.2 RPG Restart ..................................................................................................... 3-46
3.7.1.6.4.3 RDA Restart ..................................................................................................... 3-46
3.7.1.6.4.4 RDA Warm Startup ......................................................................................... 3-47
3.7.1.6.4.5 User Interface Connection Control................................................................. 3-47
3.7.1.6.4.6 Controlled Shutdown....................................................................................... 3-47
3.7.1.6.4.7 Mode Control ................................................................................................... 3-47
3.7.1.6.4.7.1 RDA Mode Control .................................................................................... 3-47
3.7.1.6.4.7.2 RPG Mode Control .................................................................................... 3-47
3.7.1.6.4.8 RPG Reconfiguration ....................................................................................... 3-47
3.7.1.6.4.9 Level II ............................................................................................................. 3-48
3.7.1.6.4.10 Product Generation Control ............................................................................ 3-48
3.7.1.6.4.11 Product Storage Control .................................................................................. 3-48
3.7.1.6.4.12 Adaptation Control .......................................................................................... 3-48
3.7.1.6.4.13 RDA Backup Power Control ........................................................................... 3-48
3.7.1.6.4.14 Interface Configuration ................................................................................... 3-48
3.7.1.6.4.15 RDA and RPG Redundant Channel Control ................................................. 3-48
3.7.1.6.4.16 Product Distribution and Data Ingest Control .............................................. 3-49
3.7.1.6.4.17 Volume Coverage Pattern Control ................................................................. 3-49
3.7.1.6.4.18 Clutter Suppression Control ........................................................................... 3-49
3.7.1.6.4.19 System Administration ................................................................................... 3-49
3.7.1.6.4.20 Stop/Start Base Data Transmission ............................................................... 3-50 v
3.7.1.6.4.21 Spot Blanking Control ..................................................................................... 3-50
3.7.1.6.4.22 RDA Maintenance ........................................................................................... 3-50
3.7.1.7 Remote System Access .............................................................................................. 3-50
3.7.1.8 Interface Requirements ............................................................................................. 3-50
3.7.1.8.1 Internal Interfaces ................................................................................................. 3-50
3.7.1.8.1.1 Dedicated PUP Connections ........................................................................... 3-50
3.7.1.8.1.2 Dial-up PUP Connections ............................................................................... 3-50
3.7.1.8.2 External Interfaces Requirements ........................................................................ 3-50
3.7.1.8.2.1 Legacy Class 1 ................................................................................................. 3-50
3.7.1.8.2.2 Legacy Class 2 ................................................................................................. 3-51
3.7.1.8.2.3 Deleted ............................................................................................................. 3-51
3.7.1.8.2.4 Base Data Distribution Interface ................................................................... 3-51
3.7.1.8.2.5 FAA Remote Monitoring Subsystem (RMS) .................................................. 3-51
3.7.1.8.2.6 Remote Access Interfaces ................................................................................ 3-51
3.7.1.9 Diagnostic Techniques............................................................................................... 3-51
3.7.1.10 Security ...................................................................................................................... 3-51
3.7.2 Radar Data Acquisition Functional Area ........................................................................ 3-54
3.7.2.1 General Requirements .............................................................................................. 3-54
3.7.2.1.1 Monitor/Control ...................................................................................................... 3-54
3.7.2.1.2 Operational Modes ................................................................................................. 3-54
3.7.2.1.3 Long Pulse .............................................................................................................. 3-54
3.7.2.1.4 Short Pulse ............................................................................................................. 3-54
3.7.2.1.5 RDA Power Failure Recovery Requirements ....................................................... 3-54
3.7.2.2 Performance Characteristics..................................................................................... 3-55
3.7.2.2.1 Coverage ................................................................................................................. 3-55
3.7.2.2.1.1 Base Data Coverage ........................................................................................ 3-55
3.7.2.2.1.1.1 Base Reflectivity ....................................................................................... 3-55
3.7.2.2.1.1.2 Base Velocity and Spectrum Width ......................................................... 3-55
3.7.2.2.1.1.3 Differential Reflectivity ............................................................................ 3-55
3.7.2.2.1.1.4 Correlation Coefficient ............................................................................. 3-55
3.7.2.2.1.1.5 Differential Phase ..................................................................................... 3-56
3.7.2.2.1.2 Volume Coverage ............................................................................................. 3-56
3.7.2.2.1.2.1 Dynamic Scanning .................................................................................... 3-56
3.7.2.2.1.2.2 Scanning Strategy 1 ................................................................................. 3-56
3.7.2.2.1.2.3 Scanning Strategy 2 ................................................................................. 3-56
3.7.2.2.1.2.4 Scanning Strategy 3 ................................................................................. 3-57
3.7.2.2.1.2.5 Scanning Rate ........................................................................................... 3-57
3.7.2.2.1.2.6 Scanning Strategy 4 ................................................................................. 3-57
3.7.2.2.1.2.7 Scanning Strategy 5 ................................................................................. 3-57
3.7.2.2.1.3 Spot Blanking .................................................................................................. 3-57
3.7.2.2.2 Sample Interval ...................................................................................................... 3-57
3.7.2.2.2.1 Azimuth Sample Interval ............................................................................... 3-57
3.7.2.2.2.2 Range Sample Interval ................................................................................... 3-58
3.7.2.2.2.3 Effective Beam Width ..................................................................................... 3-58
3.7.2.2.3 Accuracy and Precision .......................................................................................... 3-58
3.7.2.2.3.1 Mean Radial Velocity and Spectrum Width .................................................. 3-58
3.7.2.2.3.2 Reflectivity (Z), Differential Reflectivity ........................................................ 3-59
3.7.2.2.3.3 Correlation Coefficient, Differential Phase ................................................... 3-59
3.7.2.2.3.4 Range ................................................................................................................ 3-60
3.7.2.2.4 Minimum Detection Capability and Dynamic Range .......................................... 3-60
3.7.2.3 Antenna ...................................................................................................................... 3-60 vi
3.7.2.3.1 Antenna Assembly ................................................................................................. 3-60
3.7.2.3.2 Antenna Performance ............................................................................................ 3-61
3.7.2.3.3 Antenna Design ...................................................................................................... 3-61
3.7.2.3.4 Radome ................................................................................................................... 3-62
3.7.2.3.4.1 Radome Service Conditions ............................................................................ 3-62
3.7.2.3.4.2 Radome Radiation Considerations ................................................................. 3-62
3.7.2.3.5 Pedestal and Antenna ............................................................................................ 3-62
3.7.2.3.5.1 Pedestal Requirements ................................................................................... 3-62
3.7.2.3.5.2 Antenna Mounting .......................................................................................... 3-63
3.7.2.3.5.3 Antenna Scanning Control ............................................................................. 3-63
3.7.2.4 Transmitter ................................................................................................................ 3-63
3.7.2.4.1 Transmitter Interlock ............................................................................................ 3-63
3.7.2.4.2 Transmitter Recovery Time ................................................................................... 3-63
3.7.2.4.3 Redundant Transmitter ......................................................................................... 3-63
3.7.2.4.4 Pulse Repetition Frequency .................................................................................. 3-64
3.7.2.4.5 Transmitter Maintenance Control and Protection .............................................. 3-64
3.7.2.4.5.1 Protective Circuitry ......................................................................................... 3-64
3.7.2.4.5.2 Maintenance Controls ..................................................................................... 3-64
3.7.2.5 Receiver ...................................................................................................................... 3-64
3.7.2.6 Signal Processing Capability .................................................................................... 3-64
3.7.2.7 Ground Clutter Suppression ..................................................................................... 3-65
3.7.2.7.1 Ground Clutter Suppression Requirements ......................................................... 3-65
3.7.2.7.2 Clutter-related Estimate Errors ........................................................................... 3-66
3.7.2.8 Control Functions ...................................................................................................... 3-67
3.7.2.8.1 RDA System States ................................................................................................ 3-68
3.7.2.8.2 RDA Transitions .................................................................................................... 3-68
3.7.2.8.2.1 Cold Startup Transition .................................................................................. 3-68
3.7.2.8.2.2 Terminate transition ....................................................................................... 3-68
3.7.2.8.2.3 Applications Load transition .......................................................................... 3-68
3.7.2.8.2.4 Shutdown transition........................................................................................ 3-68
3.7.2.8.2.5 Restart transition ............................................................................................ 3-69
3.7.2.8.2.6 Startup transition ............................................................................................ 3-69
3.7.2.8.2.7 Power Up transition ........................................................................................ 3-69
3.7.2.8.2.8 Maintenance transition ................................................................................... 3-69
3.7.2.8.2.9 Power Down transition ................................................................................... 3-69
3.7.2.8.3 Shutdown ................................................................................................................ 3-69
3.7.2.8.4 Warm Startup ........................................................................................................ 3-69
3.7.2.8.5 Control Commands ................................................................................................ 3-70
3.7.2.9 Monitoring and Error Detection Capability ............................................................. 3-70
3.7.2.10 Display Functions ...................................................................................................... 3-70
3.7.2.11 Calibration ................................................................................................................. 3-70
3.7.2.12 Setup Mode................................................................................................................. 3-71
3.7.2.13 Archive Level I Interface Connections ..................................................................... 3-71
3.7.3 Radar Product Generation Functional Area ................................................................... 3-73
3.7.3.1 Product Generation ................................................................................................... 3-73
3.7.3.1.1 Base Products ......................................................................................................... 3-74
3.7.3.1.2 Derived Products .................................................................................................... 3-74
3.7.3.1.3 Alphanumeric Products ......................................................................................... 3-74
3.7.3.1.4 Derived Data Array Products ................................................................................ 3-74
3.7.3.2 Product Storage ......................................................................................................... 3-74
3.7.3.3 Product Distribution .................................................................................................. 3-75 vii
3.7.3.3.1 Distribution to Class 1, 98 and/or 99 Users ......................................................... 3-75
3.7.3.3.1.1 Distribution to a Collocated Legacy Class 1 User ......................................... 3-75
3.7.3.3.2 Distribution to Class 2 Users ................................................................................ 3-75
3.7.3.3.3 Deleted .................................................................................................................... 3-76
3.7.3.3.4 Distribution of Base Data to Users ....................................................................... 3-76
3.7.3.4 RDA and RPG Control ............................................................................................... 3-76
3.7.3.4.1 RPG Startup ........................................................................................................... 3-76
3.7.3.4.2 RPG Restart ........................................................................................................... 3-77
3.7.3.4.3 RDA Restart and Warm Startup Control ............................................................. 3-78
3.7.3.4.4 Interface Connection Control ................................................................................ 3-78
3.7.3.4.5 Controlled Shutdown ............................................................................................. 3-78
3.7.3.4.6 Mode Control .......................................................................................................... 3-78
3.7.3.4.6.1 RDA Mode Control .......................................................................................... 3-78
3.7.3.4.6.2 RPG Mode Control ........................................................................................... 3-78
3.7.3.4.7 RPG Reconfiguration ............................................................................................. 3-79
3.7.3.4.8 Level II Control ...................................................................................................... 3-79
3.7.3.4.9 Product Generation Control .................................................................................. 3-79
3.7.3.4.9.1 Routine Product Generation ........................................................................... 3-79
3.7.3.4.9.2 Alert Product Generation ................................................................................ 3-79
3.7.3.4.9.3 One-time Product Generation ......................................................................... 3-79
3.7.3.4.10 Product Storage Control ........................................................................................ 3-79
3.7.3.4.11 RPG Adaptation Control ........................................................................................ 3-79
3.7.3.4.12 RDA Backup Power Control .................................................................................. 3-80
3.7.3.4.13 Communication Interface Configuration .............................................................. 3-80
3.7.3.4.14 RDA and RPG Redundant Channel Control ........................................................ 3-80
3.7.3.4.15 Volume Coverage Pattern (VCP) Control ............................................................. 3-80
3.7.3.4.16 Clutter Suppression Control ................................................................................. 3-80
3.7.3.5 RDA and RPG Status Monitoring and Error Detection .......................................... 3-80
3.7.3.5.1 Status Monitoring .................................................................................................. 3-80
3.7.3.5.2 Storage of Status Messages ................................................................................... 3-80
3.7.3.6 Archive Level III ........................................................................................................ 3-81
3.7.3.7 Data Ingest ................................................................................................................. 3-81
3.7.3.7.1 Bias Table Ingest and Processing ......................................................................... 3-81
3.7.3.8 Alert Processing ......................................................................................................... 3-81
3.7.3.8.1 Alert Categories ..................................................................................................... 3-81
3.7.3.8.2 Alert Criteria .......................................................................................................... 3-81
3.7.3.8.3 Alert Message ......................................................................................................... 3-81
3.7.3.9 RPG HCI .................................................................................................................... 3-81
3.7.4 Principal User Processing Functional Area .................................................................... 3-82
3.7.5 Facilities Functional Area ................................................................................................ 3-84
3.7.5.1 Space ........................................................................................................................... 3-84
3.7.5.2 Electrical .................................................................................................................... 3-84
3.7.5.2.1 Power Characteristics ............................................................................................ 3-84
3.7.5.2.2 Lighting .................................................................................................................. 3-85
3.7.5.2.3 Cables ...................................................................................................................... 3-85
3.7.5.2.4 Electromagnetic Interference Shielding ............................................................... 3-85
3.7.5.2.5 Internal and External Cableways ......................................................................... 3-85
3.7.5.2.6 Grounding ............................................................................................................... 3-86
3.7.5.3 Environmental ........................................................................................................... 3-86
3.7.5.3.1 Personnel ................................................................................................................ 3-86
3.7.5.3.2 Equipment .............................................................................................................. 3-86 viii
3.7.5.3.3 Electromagnetic Environment .............................................................................. 3-86
3.7.5.4 Architecture ............................................................................................................... 3-87
3.7.5.4.1 Clearances .............................................................................................................. 3-87
3.7.5.4.2 Access ...................................................................................................................... 3-87
3.7.5.4.3 Human Factors ....................................................................................................... 3-87
3.7.5.4.4 Telecommunications .............................................................................................. 3-87
3.7.5.4.4.1 RDA Intercom and RDA/RPG Voice Communications ................................. 3-87
3.7.5.4.4.2 RDA…
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