SRS-MOST-555-1.pdf

SRS-MOST-555

CAGE Code 0VXY1 6 September 2006

REQUIREMENTS SPECIFICATION

for the

MASTER CONTROL STATION (MCS)

OFF-LINE SOFTWARE TOOLS (MOST)

of the

NAVSTAR GLOBAL POSITIONING SYSTEM (GPS)

AUTHENTICATED BY: _________________________________

WESLEY A. BALLENGER, JR., Colonel, USAF Commander Global Positioning Systems Wing

Distribution C: Distribution authorized to U.S. Government Agencies and their contractors (Reason: Administrative or

Operational use.) (Date of determination: 31 May 2005). Other requests for this document shall be referred to Navstar Global Positioning System Joint Program Office (SMC/GP).

WARNING : This document contains technical data whose export is restricted by the Arms Export Control Act (Title 22, U.S.C. 2571 et seq.) or Executive Order 12470. Violation of these export control laws is subject to severe criminal penalties.

Dissemination of this document is controlled under DOD directive 5230.25 and AFI 61-204. Include this notice with any reproduced part of this document.

DESTRUCTION NOTICE: For classified documents, follow DOD 5220.22M, National Industrial Security Program Operating Manual. For unclassified limited documents, destroy by any method that will prevent disclosure of the contents or reconstruction of the document.

This document contains information

EXEMPT FROM MANDATORY DISCLOSURE

Under the FOIA. Exemptions 3 & 5 apply.

FOR OFFICIAL USE ONLY

Document Version History

Version Date Event

Initial Release August 2006 Initial Draft

SRS-MOST-555 6 September 2006 i

TABLE OF CONTENTS

1.0 SCOPE

1.1 Identification

1.2 Document Overview

1.3 Document Requirements Terminology and Use

2.0 REFERENCED DOCUMENTS

2.1 Government Documents

2.1.1 Specifications

2.1.2 Standards

2.1.3 Drawings

2.1.4 Other Publications

2.2 Non-Government Documents

2.2.1 Specifications

2.2.2 Standards

2.2.3 Drawings

3.0 REQUIREMENTS

3.1 General Software Tool Requirements

3.2 Hardware Requirements

3.2.1 MCS Off-line Workstation Requirements

3.2.2 General Display Requirements

3.3. Specific Software Tool Requirements

3.3.1 USNO Time Transfer Tool Software Requirements

3.3.2 MOMSIM Software Tool Requirements

3.3.3 PCM Command Calculator Software Tool Requirements

3.3.4 DCEA Clock Flush Software Tool Requirements

3.3.5 NDS Delay Calibration Software Tool Requirements

3.3.6 Temporary Analysis Tool for 2 SOPS Requirements

3.3.7 Integrated Transfer Subsystem Receive Slot Configuration Tool

3.3.8 Navigation/Special Message Translator

3.3.9 NDU Message 48/49 Time Converter

3.3.10 Clock Q Visualization

ii

3.3.11 Time Group Delay Spreadsheet

3.3.12 Partitioning Tool

3.3.13 VisTab

3.3.14 Comparator Reference Value (CRV) Calculator

4.0 QUALIFICATION PROVISIONS

4.1 Test Program

4.1.1 Verification Method

4.2 Verification Methods

4.2.1 Demonstration

4.2.2 Test

4.2.3 Analysis

4.2.4 Inspection

5.0 REQUIREMENTS VERIFICATION MATRIX

6.0 REQUIREMENTS TRACEABILITY

7.0 NOTES

7.1 Operational Environment/Platform

7.2 Abbreviations and Acronyms

APPENDIX I FOR OFFICIAL USE ONLY (FOUO) REQUIREMENTS

1.0 SCOPE

1.1 Identification

This specification documents requirements for the GPS Master Control Station (MCS) Off-line Software Tools. Most of these software tools were written by operators or organizational level software maintainers to support day-to-day operations and improve operational efficiency. They were coded in the popular personal computer (PC) software language of the day and, once demonstrated to work, frozen in configuration. In many cases, no documentation or commentary in the code explained the logic (algorithms) or function the software was composed to perform. The algorithms should be documented. Often the original coder transferred away and there was no recovery if the program failed. Sometimes updates in an external operating system would render the software tool unusable.

In preparation for fielding a major upgrade to the Operational Control System (OCS), the Architecture Evolution Plan (AEP), the GPS Site Activation Task Force (SATAF) decided a true functional baseline of the Legacy MCS needed to be documented. A complete baseline was necessary so that a before and after AEP installation state could be accurately determined. The large number of software tools had to be cataloged and defined well enough that a course of action could be chosen. A Software Tools Working Group was established to define the categories a software tool would be assigned to after their function, usage, and future use had been determined. It established four categories. A given software tool was either retired as no longer needed, catalogued, recoded off-line, or recommended for online implementation. Cataloging was a special category where a software tool was kept in its existing state. The software was copied and placed in secure storage to be reloaded in case of software failure. A description of the software tool’s use, input, and output was written to minimally document the software tool.

In the initial release of this requirements specification the software tools are those that have been selected for recoding or have been provided by external government entities as Government Off-the-Shelf (GOTS) software. These tools are expected to be hosted on the MCS Off-line Workstation (MOW) or other off-line platforms as mission needs dictate. The actual implementation of these tools in MOW software releases is contingent on operational need. The following tools constitute the

MOST:

The U.S. Naval Observatory (USNO) Time Transfer Tool (T3) software tool provides the necessary corrections to enable the 2nd Space Operations Squadron (2 SOPS) to meet operational time transfer data requirements defined in ICD-GPS-2002, Navstar GPS Control Segment/U.S. Naval Observatory Time Transfer Interfaces.

Momentum Simulator (MOMSIM) is an application used by GPS Navigation and Analysis engineers to monitor the momentums associated with the Block II/IIA GPS satellites.

MOMSIM helps the GPS engineer determine the optimum time to perform a momentum dump based on the results from the MOMSIM projections.

The Pulse Code Modulator (PCM) Command Calculator software tool determines which commands are needed to change the satellite’s modulation parameters. The PCM Configuration Tool is used by GPS Navigation and Analysis engineers to determine the desired Telemetry, Tracking, and Commanding (TT&C) magnitude command from the Block II/IIA Orbital Operations Handbook (OOH).

The Digital Control Electronics Assembly (DCEA) Clock Flush software tool is used to track the clock rollovers for Block II/IIA satellites. The tool helps the 2 SOPS Analysis personnel verify the last rollover time and predict the next rollover time.

(FOUO) The Nuclear Detonation (NUDET) Detection System (NDS) Delay Calibration software tool generates the Delayed Calibration command along with the arguments. The command tells a Block II/IIA satellite that a delayed calibration is to be performed. The arguments consist of the satellite, the ground antenna, and when certain portions of the delayed calibration are to begin. The command string is manually entered on the command line on the MCS legacy system.

The Temporary Analysis Tool for 2 SOPS (TAT2), GOTS software developed for the National Geospatial-Intelligence Agency (NGA) by Applied Research Laboratories (ARL), allows 2 SOPS to independently monitor GPS navigation messages and performance by utilizing a T1 connection between NGA and 2 SOPS to receive data from NGA monitor stations (MS). With the addition of the TAT2 enhancements, TAT2 also has the capability to monitor Coarse/Acquisition (C/A) code data. TAT2 is NGA’s Smoothed Residuals Calculator tool hosted on a non-MOW SUN® workstation and it is located on the MCS operations floor. As a GOTS tool, the requirements for TAT2 vary from the other MOST tools. The TAT2 tool does not include an on-line Help or print capability (see MOST general requirements 20, 30 and 50). Additionally, the functional verification of TAT2 capabilities is the responsibility of the TAT2 development agency.

The Integrated Transfer Subsystem (ITS) Receive Slot Configuration tool assists the 2 SOPS GPS Operations Center personnel in determining the commands to turn on and off for the specific slots of the ITS crosslink. The user opens the ITS Slot Configuration program and updates the ITS Configuration for the specified Block II/IIA satellite. The user toggles the slots numbered 1-24 to read either ‘ON’ or ‘OFF’. The command parameter is automatically updated to reflect the settings requested by the engineer. From the updated information, a command is formatted to send to the satellite.

The Navigation and Special Message Translator tool validates the contents of the Space Vehicle (SV) Navigation message. The tool provides a human-readable translation (American Standard Code for Information Interchange [ASCII] character encoding) of the hexadecimal-coded Navigation and Special messages from the SV.

The Navigation and Special Message Translator tool supports Block II/IIA and IIR navigation special messages.

The Navigation Data Unit (NDU) Message 48/49 Time Converter provides a human-readable translation (ASCII) of the hexadecimal-coded NDU 48 and 49 time values from the SV. The NDU Message 48/49 Time Converter supports Block II/IIA NDU 48 and 49 time messages.

The Clock Q Visualization tool assists the 2 SOPS analysts in updating the clock continuous time update process noise database values, for satellites into the appropriate System Adaptable Parameters file for satellite vehicle characteristics --- KKS file(s), and for MSs into the appropriate ground station definition file --- KKG file(s), for implementation into the MCS.

The Time Group Delay (TGD) Spreadsheet provides an automated mechanism for the 2 SOPS Navigation Analysis personnel to, on a quarterly basis, compare current MCS TGD data with new empirical TGD data from Jet Propulsion Laboratory (JPL) or other source agency. The spreadsheet application performs various calculations using both old and new data. The resultant numbers indicate if a satellite’s KKS file requires update.

The Partitioning Tool is used by satellite operators to select and place GPS satellites [based on their Space Vehicle Number (SVN)] into three or four partitions to calculate station to satellite visibility gaps. The Partitioning Tool helps the operator assess the effects of partitioning strategies on satellite visibilities relative to the MSs.

This assessment allows operators to select strategies that optimize Kalman filter performance.

VisTab generates the times that GPS satellites are visible to specified GPS MSs.

VisTab outputs, in various formats, the times a satellite is in view of a station, subject to specific constraints.

The Comparator Reference Value (CRV) Calculator provides numeric input to the Block II/IIA Selective Availability (SA) phase error recovery process, (which operates each X1 epoch) and follows the completion of the SA recovery process (once every four X1 epochs) when both recovery processes execute in the same X1 epoch (i.e., every recovery epoch).

1.2 Document Overview

This specification establishes performance, design, development, and test requirements for the off-line software tools in the OCS. It is a multi-level requirements specification containing requirements for several off-line software tools used to support OCS operations. The document is to be treated as For Official Use Only (FOUO) based upon guidance provided in DoD 5200.1-R, Information Security Program.

1.3 Document Requirements Terminology and Use

This specification and its supporting/subordinate specifications utilize the following requirements terminology:

a. A “shall” is used to identify a requirement (or any portion thereof), which is being designed, built and unless otherwise stated, tested. Each “shall” is uniquely numbered for identification and traceability. Each “shall” is allocated to system components, test phase, and a verification method.

b. A “must” is used to identify a requirement that is not being designed, built or tested, but is a system design constraint or provision that is being provided to the designer by the government and which the designer depends on. Each “must” is uniquely numbered for identification and allocation. Each “must” is only allocated to system components for design guidance (no traceability to lower-level specifications), but not to a test phase or verification method. A “must” is not traced to lower-level specifications. This version of the specification has no "musts.”

c. The conventional usage of “wills” for Government Furnished Equipment/Property (GFE/GFP), etc., is now handled herein as described above (now using “musts”), except in the cases where the portion of the system being designed is not dependent upon the GFE/GFP (which is identified by the use of “will”). “Wills” are not numbered, and thus there is no provision for unique identification or traceability.

“Wills” are not further allocated to system components, test phase or verification method. Throughout this specification, whenever the term monitor station or MS is used it is in reference to the six OCS monitor stations. Reference to NGA monitor stations is always specifically identified (i.e., NGA monitor stations or NGA MS).

2.0 REFERENCED DOCUMENTS

2.1 Government Documents

The following documents, for the issues shown, form a part of this specification to the extent specified herein. In the event of conflict between the documents referenced herein and the contents of this specification, the contents of this specification supersede the contents of the referenced documents.

2.1.1 Specifications

2.1.1.1 Federal

None.

2.1.1.2 Military

None.

2.1.1.3 Other Government Activities

IS-GPS-200

Current Issue

Navstar GPS Space Segment/Navigation User Interfaces

ICD-GPS-202

Current Issue

Navstar GPS Control Segment/US Naval Observatory Time Transfer Interfaces

ICD-GPS-211

Current Issue

Navstar GPS Control Segment/NGA (National Geospatial-Intelligence Agency) Interfaces

ICD-GPS-240

Current Issue

Navstar GPS Control Segment to User Support Community Interfaces

SS-CS-500

Current Issue

System Specification for the Operational Control System of the Navstar Global Positioning System

Table 2.1.1.3 Authenticated Documents

The effective version of these documents shall be the approved baseline as maintained by the GPS Joint Program Office (JPO) Configuration Management Office.

2.1.2 Standards

2.1.2.1 Federal

None.

2.1.2.2 Military

None.

2.1.2.3 Other Government Activities

None.

2.1.3 Drawings

None.

2.1.4 Other Publications

2.1.4.1 Manuals

DoD 5220.22-S April 1975

COMSEC Supplement

NAVSTAR GPS

SPG

1 August 1997

Navstar Global Positioning System Protection Guide, Military Signal Development

Table 2.1.4.1 Manuals

2.1.4.2 Regulations

2.1.4.3 Handbooks

2.1.4.4 Bulletins

None.

2.2 Non-Government Documents

The following documents of the exact issue shown form a part of this specification to the extent specified herein. In the event of conflict between documents referenced herein and the contents of this specification, the contents of this specification are considered superseding requirements.

2.2.1 Specifications

Integrated Design Document (IDD)

SCR-03-0048

Integrate USNO Phase 1 Functionality into MCS Architecture

Integrated Design Document (IDD)

SCR 04-0005

Integrate MOMSIM tool into the MCS Baseline

Integrated Design

SCR 04-0028

Pulse Code Modulator (PCM) Configuration tool

SCR 04-0004

Integrate DCEA Clock Dump Flush into MCS Baseline

SCR 04-0027

Nuclear Detonation (NUDET) Detection System (NDS) Delayed Calibration Worksheet

Document

SCR 04-0026

Incorporate TAT2 GOTS software into the MCS Baseline

SCR 04-0025

Integrate ITS Receive Slot Configuration tool into the MCS Baseline

SCR 04-0134

Integrate Navigation/Special Message Translator into the MCS Baseline

SCR 04-0135

Integrate NDU Message 48/49 Time Converter into the MCS Baseline

Integrated Design Document 05-0052

Integrate Clock Q Visualization into MCS Baseline

SCR 05-0079

Integrate the Time Group Delay Spreadsheet into MCS Baseline

Integrated Design Document 05-0080

Migrate Partitioning Tool from KRT to MOW

05-0081

Migrate VisTab from KRT to MOW

SCR 05-0083

Integrate the Comparator Reference Value Calculator into MCS Baseline

Table 2.2.1 Specifications

2.2.2 Standards

None.

2.2.3 Drawings

3.0 REQUIREMENTS

3.1 General Software Tool Requirements

MOST 00 The operating system(s) of the off-line tools workstation(s) shall comply with current Air Force and Department of Defense security standards.

MOST 10 Where applicable, the off-line tool shall have a File menu option with a sub-menu Exit or a Quit option.

MOST 20 Where applicable, the off-line tool shall have a Help menu option with a sub-menu About option that shall display the name and description of the program.

MOST 30 Where applicable, the off-line tool shall have a Help menu option with a sub-menu Help option that shall display help/usage information for the tool.

MOST 40 Where applicable, the off-line tool shall make use of Hotkeys.

MOST 50 Where applicable, the off-line tool shall provide a print capability.

MOST 60 Where applicable, the off-line tool shall provide the ability to save profile data.

MOST 70 Where applicable, the off-line tool shall provide the ability to save output data.

MOST 80 All software tools shall initialize upon operator selection.

3.2 Hardware Requirements

3.2.1 MCS Off-line Workstation Requirements

MOST 90 The MOW shall have a processing speed of no less than 300 MegaHertz/sec and installed memory of no less than 512 Megabytes.

MOST

The MOW operating system shall allow at least three processes to run concurrently.

MOST

A video display device with at least a 19.8 inch diagonal view shall be provided.

MOST

The MOW shall process System Effectiveness Model (SEM) formatted almanac data that complies with ICD-GPS-240.

3.2.2 General Display Requirements

MOST

The MOST shall display error messages if program initialization fails.

MOST

The MOST shall display version information if requested.

MOST

The MOST shall display the tool name in the title bar.

MOST

The MOST shall enable screen display resize.

3.3. Specific Software Tool Requirements

3.3.1 USNO Time Transfer Tool Software Requirements

MOST

The T3 Off-line Tool shall alert the user if the timing message for the previous day is not received by 1500Z of the current day.

MOST

170 The T3 Off-line Tool shall allow the user to view log files.

MOST

180 The T3 Off-line Tool shall allow the user to view timing messages.

MOST

The T3 Off-line Tool shall display the Ops Report upon program initialization.

MOST

The T3 Off-line Tool shall allow the user to view data reports.

MOST

The T3 Off-line Tool shall allow the user to print data reports.

MOST

The T3 Off-line Tool shall allow the user to view plot reports.

MOST

The T3 Off-line Tool shall allow the user to print plot reports.

MOST

The T3 Off-line Tool shall allow the user to view the date in a Year, Day of Year (DOY) format.

MOST

The T3 Off-line Tool shall allow the user to view the date in a Year, Month and Day format (YMD).

MOST

The T3 Off-line Tool shall allow the user to enter a date range (DOY or YMD) for applicable report types.

MOST

The T3 Off-line Tool shall provide context sensitive help for each Plot report data point.

MOST

The Ops Display report shall consist of the seven most recently received values of GPS – UTC(USNO) (plus any comments) and the seven most recently received values of GPS’s delivered prediction of UTC(USNO) – UTC(USNO), Root Mean Square (RMS) about zero, and All-in-View (AIV) RMS about zero (plus any comments).

MOST

The GPS – UTC(USNO) plot report shall consist of GPS – UTC(USNO) data versus date/time for the specified date span.

MOST

The Time Transfer for Average Error plot report shall consist of GPS’s delivered prediction of UTC(USNO) – UTC(USNO) average error data versus date/time for the specified date span.

MOST

The Time Transfer for Sigma plot report shall consist of GPS’s delivered prediction of UTC(USNO) – UTC(USNO) Sigma data versus date/time for the specified date span.

MOST

The Time Transfer for RMS (about 0) plot report shall consist of GPS’s delivered prediction of UTC(USNO) – UTC(USNO) RMS (about 0) data versus date/time for the specified date span.

MOST

The Time Transfer for AIV RMS (about 0) plot report shall consist of GPS’s delivered prediction of UTC(USNO) – UTC(USNO) AIV RMS (about 0) data versus date/time for the specified date span.

MOST

The Satellite Track Data for GPS – UTC(USNO) plot report shall consist of GPS – UTC(USNO) data for the specified satellite versus date/time for the specified date span.

MOST

The Satellite Track Data for GPS’s delivered prediction of UTC(USNO) – UTC(USNO) plot report shall consist of GPS’s delivered prediction of UTC(USNO) – UTC(USNO) data for the specified satellite versus date/time for the specified date span.

MOST

The Satellite Track Data for Satellite Clock – UTC(USNO) plot report shall consist of Satellite Clock – UTC(USNO) data for the specified SV Satellite Track Data for Measured Ionospheric Delay plot report versus date/time for the specified date span.

MOST

The Satellite Track Data for Measured Ionospheric Delay plot report shall consist of Measured Ionospheric Delay data for the specified satellite versus date/time for the specified date span.

MOST

The Satellite Track Data for Modeled Ionospheric Delay plot report shall consist of Modeled Ionospheric Delay data for the specified satellite versus date/time for the specified date span.

MOST

The Satellite Track Data for Modeled Tropospheric Delay plot report shall consist of Modeled Tropospheric Delay data for the specified satellite versus date/time for the specified date span.

MOST

The GPS – UTC(USNO) Report shall consist of all DFRMF time difference message type data over the specified time period.

MOST

The Time Transfer Report shall consist of all DFRHV time difference message type data over the specified time period.

MOST

The MOW shall receive timing data from USNO via secure data link, as defined in ICD-GPS-202.

MOST

The OCS shall be capable of receiving timing data from USNO via a backup method (magnetic media and/or hardcopy), as defined in

ICD-GPS-202.

MOST

Telecommunications between the MCS and the USNO shall be TCP/IP compliant.

MOST

Telecommunications between the MCS and the USNO shall be as specified in ICD-GPS-202.

MOST

The Time Transfer Tool Message Parser shall validate each timing message field in accordance with ICD-GPS-202.

MOST

The T3 Message Parser shall write all parsing activity data (message received, records read, records written, etc.) with a date/time stamp to a log file.

MOST

For messages that do not conform to ICD-GPS-202, the T3 Message Parser shall write error information to a log file.

MOST

For messages that do not conform to ICD-GPS-202, the T3 Message Parser shall write the message to an error message directory.

MOST

The T3 Message Parser shall write the timing message in its original format to a message directory.

MOST

The T3 Message Parser shall be capable of reprocessing a corrected timing message.

3.3.2 MOMSIM Software Tool Requirements

MOMSIM shall permit valid Block II/IIA SVN, momentum sample, ephemeris, inertia and timeframe inputs.

MOST

MOMSIM shall allow the user to save validated inputs as a profile.

MOST

MOMSIM shall allow the user to select and display saved profile data.

MOST

MOMSIM shall compute and display optimum momentum dump dates and times for Block II/IIA satellites.

MOST

MOMSIM shall compute and display momentums and dump windows after the tool is supplied with inputs as defined in Integrated Design Document (IDD) SCR 04-0005.

MOST

MOMSIM shall print any output generated.

MOST

MOMSIM shall reset all values to default values upon operator selection.

3.3.3 PCM Command Calculator Software Tool Requirements

The PCM Command Calculator shall initially display default values.

MOST

The PCM Command Calculator shall supply a correct TT&C Magnitude Command number which shall be manually output to the MCS by the operator after the tool is supplied with inputs as defined in Integrated Design Document (IDD) SCR 04-0028.

MOST

The PCM Command Calculator shall identify an error when input values do not match a valid TT&C Magnitude Command number.

MOST

The PCM Command Calculator shall reset to default values upon operator selection.

MOST

The PCM Command Calculator shall convert Binary output to Octal.

3.3.4 DCEA Clock Flush Software Tool Requirements

MOST

The DCEA Clock Flush Tool shall permit valid Block II/IIA SVN and date/time value.

MOST

The DCEA Clock Flush Tool shall accept year values between 1980 and 2999.

MOST

The DCEA Clock Flush Tool shall accept selection from DCLOCK list.

MOST

The DCEA Clock Flush Tool shall accept 365 day of year values.

MOST

The DCEA Clock Flush Tool shall accept 366 day of year values for leap years.

MOST

The DCEA Clock Flush Tool shall accept selection of hour of day from DCLOCK list, MOST

The DCEA Clock Flush Tool shall accept hour values of 0 to 23.

MOST

The DCEA Clock Flush Tool shall accept minutes selected from DCLOCK list.

MOST

The DCEA Clock Flush Tool shall accept minute values from 0 to 59.

MOST

The DCEA Clock Flush Tool shall convert input day/hour/minute to seconds.

MOST

The DCEA Clock Flush Tool shall calculate and display the last rollover in day/hour/minute/second format for the selected Block II/IIA satellite after being supplied with inputs as defined in IDD SCR 04-0004.

MOST

The DCEA Clock Flush Tool shall display last rollover time in seconds.

MOST

The DCEA Clock Flush Tool shall display last rollover in day/hour/minute/second format.

3.3.5 NDS Delay Calibration Software Tool Requirements.

See Appendix I.

3.3.6 Temporary Analysis Tool for 2 SOPS Requirements.

The following TAT2 requirements were provided by SMC/GPD from information provided by Applied Research Laboratories, the NGA development contractor.

Amplifying detail on TAT2 is provided in the User’s Guide for the Temporary Analysis Tool at 2 SOPS (TAT2).

MOST

The software shall operate on Solaris utilizing an approved configuration of the operating system.

MOST The system and software shall allow for simultaneous concurrent

880 use from at least three workstations.

MOST

When the software utilizes 15 minute smoothed data, selective availability (SA) corrected data shall be used.

MOST

When the software utilizes 1.5-second data, SA uncorrected data shall be used.

MOST

Observed Range Deviations (ORDs) shall be computed using the satellite broadcast ephemeris.

MOST

The system shall require an active network connection between the workstation and the operational Monitor Station Network Control Center (MSNCC) in accordance with ICD-GPS-211 and IDD SCR 04-0026 whenever the software is in use (i.e. no local data).

MOST

The software shall provide a tabular display of the latest 15-minute smoothed pseudorange ORDs for all SVs in track by operational NGA MSs with dedicated links. (Henceforth, this software shall be referred to as the Quick Look Display (QLD).) Rows shall be satellites. Columns shall be ordered by monitor stations. Rows shall be ordered in increasing SVN.

MOST

The QLD shall indicate (with the word 'VIS') if a satellite is above the cutoff angle for the station but no data was generated.

MOST

The QLD shall indicate if an SV is not in track at any NGA monitor station.

MOST

The QLD shall indicate if no SVs are in track at a single NGA monitor station.

MOST

The QLD shall indicate ORDs larger than a configurable threshold.

MOST

The software shall provide a QLD displaying 1.5-second L1 C/A pseudorange ORDs.

MOST

The software shall provide a QLD displaying 1.5-second precision military code [P(Y)] pseudorange ORDs.

MOST

The software shall provide plots of the 1.5 second L1 C/A pseudorange data for at least the previous one-hour for at least one satellite for all stations that are tracking the satellite. (Henceforth, this software shall be referred to as the Residual Analysis Tool

(RAT).)

The RAT shall provide interactive plotting of 15 minute smoothed pseudorange ORDs for all NGA monitor stations for at least any 24-hour period. The period shall be at any time during at least the previous two weeks.

The RAT shall provide interactive plotting of 1.5-second P/Y pseudorange ORDs for NGA monitor stations with dedicated communication lines for a period of at least any one-hour period for all satellites for one monitor station. The period shall be at any time during at least the previous two weeks.

MOST

The RAT shall provide interactive plotting of 1.5-second L1 C/A pseudorange ORDs for NGA monitor stations with dedicated communication lines for a period of at least any one-hour period for all satellites for one monitor station. The period shall be at any time during at least the previous two weeks.

The software shall provide a textual output of ORDs to a comma-delimited file suitable for importing into Microsoft Excel.

3.3.7 Integrated Transfer Subsystem Receive Slot Configuration Tool

The ITS Receive Slot Configuration tool shall initially display default values.

MOST

The ITS Receive Slot Configuration tool shall allow the user to toggle on/off the slot configuration radio buttons.

MOST

The ITS Receive Slot Configuration tool shall allow the user to select a valid Block II/IIA SVN.

MOST

The ITS Receive Slot Configuration tool shall allow the user to select a valid GA.

MOST

The ITS Receive Slot Configuration tool shall allow the user to select a valid transmit slot.

MOST

The ITS Receive Slot Configuration tool shall allow the user to select a valid next word of the day.

MOST

The ITS Receive Slot Configuration tool shall allow the user to select a valid transmit mode.

MOST

The ITS Receive Slot Configuration tool shall compute the ITS Subsystem Command Words which shall be manually output to the MCS by the operator after the tool is supplied with inputs as defined in IDD SCR 04-0025.

MOST

The Refresh option on the main ITS Receive Slot Configuration window shall reset all input fields to the default values.

3.3.8 Navigation/Special Message Translator

The Navigation/Special Message Translator shall initially display default values.

MOST

The Navigation/Special Message Translator shall allow the user to enter subframe 1 hexadecimal values as described in the GPS Navigation Data Structure for Data portion of IS-GPS-200.

MOST

The Navigation/Special Message Translator shall allow the user to enter subframe 2 hexadecimal values as described in the GPS Navigation Data Structure for Data portion of IS-GPS-200.

MOST

The Navigation/Special Message Translator shall allow the user to enter subframe 3 hexadecimal values as described in the GPS Navigation Data Structure for Data portion of IS-GPS-200.

MOST The Navigation/Special Message Translator shall allow the user to

1140 enter subframe 4 hexadecimal values as described in the GPS Navigation Data Structure for Data portion of IS-GPS-200.

MOST

The Navigation/Special Message Translator shall allow the user to enter subframe 5 hexadecimal values as described in the GPS Navigation Data Structure for Data portion of IS-GPS-200.

MOST

The Navigation/Special Message Translator shall compute the translation of the Navigation/Special Message using the algorithms and conversions described in IS-GPS-200, Appendix II after the tool is supplied with inputs as specified in IDD SCR 04-0134.

MOST

The Navigation/Special Message Translator shall allow the user to reset all fields to default values.

3.3.9 NDU Message 48/49 Time Converter

The NDU Message 48/49 Time Converter shall initially display default values.

MOST

The NDU Message 48/49 Time Converter shall allow the user to enter valid Message 48 hexadecimal values.

MOST

The NDU Message 48/49 Time Converter shall allow the user to enter valid Message 49 hexadecimal values.

MOST

The NDU Message 48/49 Time Converter shall compute the conversion of the NDU Message 48/49 Time using the 29-bit Z-count algorithm described in IS-GPS-200 after the tool is supplied with inputs as defined in IDD SCR 04-0135.

MOST

The NDU Message 48/49 Time Converter shall allow the user to reset all fields to default values.

3.3.10 Clock Q Visualization

Clock Q Visualization tool shall properly initialize with user options for new and open enabled.

MOST

Clock Q Visualization tool shall properly create a new profile when the new menu option is selected.

MOST

Clock Q Visualization tool shall allow the user to select SVNs via the SVN Popup menu.

MOST

Clock Q Visualization tool shall allow the user to select the next SVN via Next button.

MOST

Clock Q Visualization tool shall allow an SVN Frequency Standard value of 1-9.

MOST

Clock Q Visualization tool shall switch to Station mode when the Station button is pressed.

MOST

Clock Q Visualization tool shall allow the user to select Stations via the Station Popup menu.

MOST

Clock Q Visualization tool shall allow the user to select the next Station via Next button.

MOST

Clock Q Visualization tool shall allow a Station Partition Value of 1- 24.

MOST

Clock Q Visualization tool shall switch to SVN mode when the SVN button is pressed.

MOST

Clock Q Visualization tool shall not allow negative Q-Values.

MOST

Clock Q Visualization tool shall allow Q-Values greater than 1000 (slider maximum value).

MOST

The slider edit boxes shall turn Red when the user is outside the limit bounds.

MOST

The edit box text shall change to Red when any of the Q-Values exceeds the last saved Q value by more than the filter value or decreases by more than the reciprocal of the filter value.

MOST

Clock Q Visualization tool shall plot the graph correctly using the proper equation after the tool is supplied with inputs as defined in IDD 05-0052. The results from the new software shall match a similar run using the existing Clock Q Excel spreadsheet.

MOST

Clock Q Visualization tool shall update the graph whenever a slider is moved.

MOST

Clock Q Visualization tool shall update the graph whenever the value in the edit box is changed and enter is pressed.

MOST

Once a Q value is changed, verify the user cannot select a different SVN or Station without first pressing the save or reset button.

MOST

When the Reset button is pressed, Clock Q Visualization tool shall reset all Q-Values for the current SVN or current Station to the last saved values and both lines of the graph shall overlap.

MOST

Clock Q Visualization tool shall update the graph whenever the Next, SVN, Station, Allan or Hadamard button is pressed.

MOST

When Output is pressed, Clock Q Visualization tool shall pop-up a new window (Clock Q Output screen) with previous and new Q Values for all SVNs.

MOST

When the Station button on the Clock Q Output screen is pressed, it shall display previous and new Q Values for all Stations.

MOST

When the SVN button on the Clock Q Output screen is pressed, it shall display previous and new Q Values for all SVNs.

MOST

Clock Q Visualization tool shall open an archive file by selecting Open from the File menu.

MOST

Clock Q Visualization tool shall save the file when the Save button is pressed.

MOST

Clock Q Visualization tool shall save the file when the Save As option is selected.

MOST

Clock Q Output screen shall close when the Close button is pressed.

MOST

The filename in the Clock Q Visualization title bar shall be followed by asterisk whenever a slider is moved or whenever the value in the edit box is changed.

MOST

The save button and save menu option shall become active whenever a slider is moved or whenever the value in the edit box is changed.

3.3.11 Time Group Delay Spreadsheet

TGD spreadsheet tool shall initially display default values.

MOST

TGD spreadsheet tool shall allow the user to manually enter old and new TGD values.

MOST

TGD spreadsheet tool shall update all TGD values for one SV after user manually enters TGD data as defined in IDD SCR 05-0079 and presses enter.

MOST

TGD spreadsheet tool shall copy the New TGD values into the old TGD value column for entire spreadsheet when user selects copy.

MOST

TGD spreadsheet tool shall reset all TGD values to the last saved values when user selects reset.

MOST

An error dialog box shall be displayed if any of the entered old or new TGD values are out of range.

MOST

For any SVN that has a non-zero Index Differences, the entire SVN row shall be highlighted in yellow.

MOST

TGD spreadsheet tool shall save the file when the Save button is pressed.

MOST

TGD spreadsheet tool shall save the file to user specified location when the Save As button is pressed.

MOST

TGD spreadsheet tool shall open user-selected TGD file when Open is selected from the file menu.

3.3.12 Partitioning Tool

Partitioning Tool display program shall notify user if Almanac data are older than established timeframe.

MOST

Partitioning Tool display program shall notify user if slots and clocks file is not up to date.

MOST

Partitioning Tool display program shall launch main display on successful initialization.

MOST

Partitioning Tool display program shall allow the user to change the date format between year and day of year; and year, month and day.

MOST

Partitioning Tool display program shall notify the user if an invalid date value is entered.

MOST

Partitioning Tool display program shall allow the user to change the run duration of the data.

MOST

Partitioning Tool display program shall allow the user to select SVNs in applicable partition list boxes.

MOST

Partitioning Tool display program shall not permit the user to select more than 32 SVNs in a partition list box.

MOST

Partitioning Tool display program shall not permit the user to select duplicate SVNs in partition list boxes.

MOST

Partitioning Tool display program shall allow the user to save profiles of selected options.

MOST

Partitioning Tool display program shall allow the user to open and reload saved profiles.

MOST

Partitioning Tool display program shall allow the user to create new profiles.

MOST

Partitioning Tool display program shall allow the user to select archived Almanac file.

MOST

Partitioning Tool display program shall allow the user to generate station-satellite visibility gap data that matches a Kalman Report Tool (KRT) run when supplied with inputs as defined in IDD 05- 0080.

MOST

Partitioning Tool program shall notify the user if attempting to propagate data beyond the set threshold.

MOST

Partitioning Tool program shall notify the user that visibility gap data are being generated.

MOST

Partitioning Tool program shall allow the user to select various reports and plots.

MOST

Partitioning Tool program shall allow the user to print the generated reports and plots.

MOST

Partitioning Tool program shall allow the user to save the generated reports and plots.

MOST

Partitioning Tool display program allows the user to perform SVN maintenance functions (add, change, and delete) via dropdown menu selection.

MOST

SVN Maintenance program shall allow the user to add, change, and/or delete SVNs.

3.3.13 VisTab

VisTab Analysis tool shall function with both Julian and YMD type data.

MOST

VisTab Analysis tool shall be able to select different combinations of SV and stations.

MOST

VisTab Analysis tool shall be able to generate visibilities of selected SV and stations when supplied with inputs as defined in IDD 05- 0081.

MOST

VisTab Analysis tool shall be able to create, modify and use user profiles.

MOST

VisTab Analysis tool shall be able to change the Vistab Almanac file.

MOST VisTab Analysis tool shall be able to generate the different reports

1880 available.

MOST

VisTab Analysis tool shall be able to save visibility data.

MOST

VisTab Analysis tool shall be able to print the different visibility data reports.

MOST

VisTab Ops tool shall initially display the default values.

MOST

VisTab Ops tool shall function with both Julian and YMD type data.

MOST

VisTab Ops tool shall be able to generate and print the Monitoring Station report for all the satellites.

MOST

VisTab Ops tool shall be able to generate and print the Ground Antenna report for all the satellites.

MOST

VisTab Station Maintenance tool shall be able to add new stations to the VisTab Station file.

MOST

VisTab Station Maintenance tool shall be able to change stations in the VisTab Station file.

MOST

VisTab Station Maintenance tool shall be able to delete stations in the VisTab Station file.

MOST

The VisTab Station Maintenance tool shall prevent the deletion or change of stations on the safe list within the VisTab Station file.

MOST

Vistab Station Initialize tool shall create the Vistab Station file.

3.3.14 Comparator Reference Value (CRV) Calculator

CRV Calculator tool shall initially display the default values.

MOST

CRV Calculator tool shall allow the user to manually enter values.

MOST

CRV Calculator tool shall write the current time from the workstation in the New Selective Availability Database (SADB) time box upon tool initialization.

MOST

An error dialog box shall be displayed if any of the entered values are out of range or contain illegal characters.

MOST

When all 4 fields have validated inputs, the CRV Calculator tool shall calculate the new CRV which shall be manually output to the MCS by the operator when the tool is provided with inputs as defined in IDD SCR 05-0083 and display it in an output field titled New Comparator Value (Hex).

MOST

The New Comparator Value shall display the correct result from the equation listed in the initialization file.

MOST

CRV Calculator tool shall refresh the display when the File – Refresh menu option [or <ctrl>-R] is selected.

4.0 QUALIFICATION PROVISIONS

4.1 Test Program

4.1.1 Verification Method

The contractor's test program shall qualify each requirement in Table 5.1, Requirements Verification Matrix, by the specified verification method.

4.2 Verification Methods

4.2.1 Demonstration

Demonstration is the operation of the system, or a part of the system, that relies on observable functional operation not requiring the use of instrumentation, special test equipment or subsequent analysis.

4.2.2 Test

Test is the operation of the system, or a part of the system, using instrumentation or other special test equipment to collect data for later analysis.

4.2.3 Analysis

Analysis is the analytical processing of accumulated data obtained from studies, calculations, analysis, modeling and/or other qualification methods. Examples are reduction, interpolation or extrapolation of test results.

4.2.4 Inspection

Inspection is the visual examination of system components, documentation, etc.

5.0 REQUIREMENTS VERIFICATION MATRIX

This table contains the traceability of software tool requirements to the corresponding test verification method(s).

Table 5.1 Requirements Verification Matrix

Requirement Number

Demonstrate Test Analysis Inspection

MOST 00 X

MOST 10 X

MOST 20 X

MOST 30 X

MOST 40 X

MOST 50 X

Requirement Number

Demonstrate Test Analysis Inspection

MOST 60 X

MOST 70 X

MOST 80 X

MOST 90 X

MOST 100 X

MOST 110 X X

MOST 115 X

MOST 120 X

MOST 130 X

MOST 140 X

MOST 150 X

MOST 160 X

MOST 170 X

MOST 180 X

MOST 190 X

MOST 200 X

MOST 210 X

MOST 220 X

MOST 230 X

MOST 240 X

MOST 250 X

MOST 260 X

MOST 270 X

MOST 280 X

MOST 290 X

MOST 300 X

MOST 310 X

MOST 320 X

MOST 330 X

MOST 340 X

MOST 350 X

MOST 360 X

MOST 370 X

MOST 380 X

MOST 390 X

MOST 400 X

MOST 410 X

MOST 420 X

MOST 430 X

MOST 440 X

Requirement Number

Demonstrate Test Analysis Inspection

MOST 450 X

MOST 460 X

MOST 470 X

MOST 480 X

MOST 490 X

MOST 500 X

MOST 510 X

MOST 520 X

MOST 530 X

MOST 540 X

MOST 550 X

MOST 560 X

MOST 570 X

MOST 580 X

MOST 590 X

MOST 600 X

MOST 610 X

MOST 620 X

MOST 630 X

MOST 640 X

MOST 650 X

MOST 660 X

MOST 670 X

MOST 680 X

MOST 690 X

MOST 700 X

MOST 710 X

MOST 720 X

MOST 730 X

MOST 740 X

MOST 750 X

MOST 760 X

MOST 770 X

MOST 780 X

MOST 790 X

MOST 800 X

MOST 810 X

MOST 820 X

MOST 830 X

MOST 840 X

Requirement Number

Demonstrate Test Analysis Inspection

MOST 850 X

MOST 860 X

MOST 870 X

MOST 880 X

MOST 890 X

MOST 900 X

MOST 910 X

MOST 920 X

MOST 930 X

MOST 940 X

MOST 950 X

MOST 960 X

MOST 970 X

MOST 980 X

MOST 990 X

MOST 995 X

MOST 1000 X

MOST 1005 X

MOST 1010 X

MOST 1015 X

MOST 1020 X

MOST 1025 X

MOST 1030 X

MOST 1040 X

MOST 1050 X

MOST 1060 X

MOST 1070 X

MOST 1080 X

MOST 1090 X

MOST 1100 X

MOST 1110 X

MOST 1120 X

MOST 1130 X

MOST 1140 X

MOST 1150 X

MOST 1160 X

MOST 1170 X

MOST 1180 X

MOST 1190 X

MOST 1200 X

Requirement Number

Demonstrate Test Analysis Inspection

MOST 1210 X

MOST 1220 X

MOST 1230 X

MOST 1240 X

MOST 1250 X

MOST 1260 X

MOST 1270 X

MOST 1280 X

MOST 1290 X

MOST 1300 X

MOST 1310 X

MOST 1320 X

MOST 1330 X

MOST 1340 X

MOST 1350 X

MOST 1360 X

MOST 1370 X

MOST 1380 X

MOST 1390 X

MOST 1400 X

MOST 1410 X

MOST 1420 X

MOST 1430 X

MOST 1440 X

MOST 1450 X

MOST 1460 X

MOST 1470 X

MOST 1480 X

MOST 1490 X

MOST 1500 X

MOST 1510 X

MOST 1520 X

MOST 1530 X

MOST 1540 X

MOST 1550 X

MOST 1560 X

MOST 1570 X

MOST 1580 X

MOST 1590 X

MOST 1600 X

Requirement Number

Demonstrate Test Analysis Inspection

MOST 1610 X

MOST 1620 X

MOST 1630 X

MOST 1640 X

MOST 1650 X

MOST 1660 X

MOST 1670 X

MOST 1680 X

MOST 1690 X

MOST 1700 X

MOST 1710 X

MOST 1720 X

MOST 1730 X

MOST 1740 X

MOST 1750 X

MOST 1760 X

MOST 1770 X

MOST 1780 X

MOST 1790 X

MOST 1800 X

MOST 1810 X

MOST 1820 X

MOST 1830 X

MOST 1840 X

MOST 1850 X

MOST 1860 X

MOST 1870 X

MOST 1880 X

MOST 1890 X

MOST 1900 X

MOST 1910 X

MOST 1920 X

MOST 1930 X

MOST 1940 X

MOST 1950 X

MOST 1960 X

MOST 1970 X

MOST 1980 X

MOST 1990 X

MOST 2000 X

Requirement Number

Demonstrate Test Analysis Inspection

MOST 2010 X

MOST 2020 X

MOST 2030 X

MOST 2040 X

MOST 2050 X

MOST 2060 X

6.0 REQUIREMENTS TRACEABILITY

Requirements traceability between the OCS System Specification (SS-CS-500) and other specifications and MOST Software Requirements Specification (SRS-MOST-555) is contained in Table 6.1.

Table 6.1 Requirements Traceability

SS-CS-500

Requirement Number/Para Number

SRS-MOST-555

Individual Tool

Table B-2 and ICD-

GPS-202

USNO Time Transfer Tool

SSS528/Para.

3.2.7.1 and SSS819/Para.

3.12.1.5

MOMSIM

SSS358/Para.

3.2.3.1.1

PCM Command Calculator

SSS240/Para.

3.2.2.2 DCEA Clock Flush

SSS440, 443/Para.

3.2.3.2.1.2

NDS Delay Calibration

SS-CS-500/ Para.

3.2.1.11.a TAT2

SSS467/Para.

3.2.3.2.3.2

ITS Receive Slot Configuration

SSS480/Para.

3.2.4.d

Navigation/Special Message Translator

SSS480/Para.

3.2.4.d

NDU Message 48/49 Converter

SSS178/Para.

3.2.1.9

Clock Q Visualization

SSS361/Para.

3.2.3.1.1 Time Group Delay

SSS1011/Para.

3.2.2.2 Partitioning Tool

SSS496/Para. 3.2.5 VisTab Appendix A CRV Calculator

7.0 NOTES

7.1 Operational Environment/Platform.

The MCS Off-line Workstation was chosen as a SUN® Workstation that will host the majority of MOST software tools. The Legacy system MOW platform is a SUN® Blade 100. The TAT2 software resides on a separate SUN® Blade 100.

7.2 Abbreviations and Acronyms

AEP Architecture Evolution Plan AF Air Force AIV All-in-View ASCII American Standard Code for Information

Interchange C/A Coarse Acquisition (navigation signal) COMSEC Communications Security CRV Comparator Reference Value DCEA Digital Control Electronics Assembly DFRHV Time difference message (file type) DFRMF Time difference message (file type) DoD Department of Defense DOY Day of Year FOUO For Official Use Only GA Ground Antenna GFE Government Furnished Equipment GFP Government Furnished Property GOTS Government Off-the-Shelf GPS Global Positioning System ICD Interface Control Drawing/Document IP Internet Protocol JPL Jet Propulsion Laboratory JPO Joint Program Office IS Interface Specification ITS Integrated Transfer Subsystem KRT Kalman Report Tool L1 Link 1 (Primary Navigation Signal (1575.42 MHz)) L2 Link 2 (Secondary Navigation Signal (1227.6

MHz)) MCS Master Control Station MIL Military MOMSIM Momentum Simulator MOST MCS Off-line Software Tools

MOW MCS Off-line Workstation MS Monitor Station MSNCC Monitor Station Network Control Center NCC Network Control Center (NGA) NDS Nuclear Detonation (NUDET) Detection System NGA National Geospatial-Intelligence Agency (formerly

NIMA)

NIMA National Imagery and Mapping Agency NUDET Nuclear Detonation OCS Operational Control System OOH Orbital Operations Handbook ORD Observed Range Deviation PC Personal Computer PCM Pulse Code Modulator P(Y) Precision GPS military navigation signal code QLD Quick Look Display RAT Residual Analysis Tool RMS Root Mean Square SA Selective Availability SADB Selective Availability Database SATAF Site Activation Task Force SEM System Effectiveness Model SPG System Protection Guide SRS Software Requirements Specification SS System Specification SV Space Vehicle SVN Space Vehicle Number T3 Time Transfer Tool TAT2 Temporary Analysis Tool for 2 SOPS - NGA data tool TBS To Be Specified TCP Transmission Control Protocol TGD Time Group Delay TT&C Telemetry, Tracking, and Commanding US United States USAF U.S. Air Force USNO U.S. Naval Observatory UTC Coordinated Universal Time VCRM Verification Cross Reference Matrix VisTab Visibility Table YMD Year, Month and Day format

2 SOPS 2nd Space Operations Squadron

APPENDIX I FOR OFFICIAL USE ONLY (FOUO) REQUIREMENTS

(This Appendix is FOUO)

3.3.5 NDS Delay Calibration Software Tool Requirements.

(FOUO) The NDS Delay Calibration tool shall permit valid Block II/IIA SVN, Ground Antenna (GA), Transmit Time, Attempt Interval and Effective Time inputs.

MOST

(FOUO) The NDS Delay Calibration tool shall accept 365 day of year values.

MOST

(FOUO) The NDS Delay Calibration tool shall accept 366 day of year values for leap years.

MOST

(FOUO) The NDS Delay Calibration tool shall accept hour values of 0 to 23.

MOST

(FOUO) The NDS Delay Calibration tool shall accept minute values from 0 to 59.

MOST

(FOUO) The NDS Delay Calibration tool shall accept second values from 0 to 59.

MOST

(FOUO) The NDS Delay Calibration tool shall accept valid Block IIA SV numbers.

MOST

(FOUO) The NDS Delay Calibration tool shall accept valid GA selection.

MOST

(FOUO) The NDS Delay Calibration tool shall require an even number of minutes to an attempt interval.

MOST

(FOUO) The NDS Delay Calibration tool shall compute the NDS delayed calibration command which shall be manually output to the MCS by the operator when provided with inputs as defined in IDD

SCR 04-0027.