SMR4 Attachment J-03 - SMR4 SSD Draft.pdf

U.S. Department of Transportation Federal Aviation Administration

Surface Movement Radar, Model 4 (SMR4) System Specification Document (SSD)

FAA-E-37024

Revision 0

DRAFT

October 25, 2024

Federal Aviation Administration 600 Independence Avenue, SW

Washington, D.C. 20591

Date:

Matthew McCann, Program Manager (Acting), AJM-4210

SIR 693KA7-25-R-00001

Section J – Attachment J-03

FAA-E-37024, Rev. 0, October 25, 2024 Page i

Table of Contents

1 SCOPE

1.1 INTRODUCTION

1.2 DESCRIPTION

1.3 CONSTRAINTS

2 APPLICABLE DOCUMENTS

2.1 GENERAL

2.2 GOVERNMENT DOCUMENTS

2.3 NON-GOVERNMENT DOCUMENTS

2.4 ORDER OF PRECEDENCE

3 REQUIREMENTS

3.1 FUNCTIONAL REQUIREMENTS

3.1.1 Detection and Processing

3.1.1.1 Target Detection

3.1.1.2 Noise and Clutter Rejection

3.1.1.3 Weather Processing

3.1.1.4 Environment

3.1.1.5 Multipath Detection

3.1.1.6 Suppression and Blanking

3.1.1.7 Plot Detection

3.1.1.8 Target Tracking

3.1.2 Multiple Surface Movement Radar Configuration

3.1.3 External Interfaces

3.1.3.1 Data Outputs

3.1.3.2 Existing System Network

3.1.3.3 Time Synchronization

3.1.4 System Startup

3.1.5 System Control

3.1.5.1 Command and Control

3.1.5.2 Command Processing

3.1.5.3 Closed Regions

3.1.6 System Monitoring

3.1.6.1 Performance Monitoring

3.1.6.2 Status Monitoring

3.1.6.3 Fault Detection and Isolation

3.1.6.4 Failover

3.1.6.5 Data Logging

3.1.7 Maintenance Terminal

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3.1.8 Antenna and Transmitter

3.1.8.1 Antenna Interlocks

3.1.8.2 Antenna Rotation

3.1.8.3 Transmitter

3.1.8.4 Heated Array

3.1.9 System Configuration and Utilities

3.1.9.1 Optimization, Verification, and Certification

3.1.9.2 Adaptation

3.1.9.2.1 Adaptation Editor

3.1.9.2.2 Map Editing Utility

3.1.9.3 Data Utilities

3.1.9.3.1 Recording

3.1.9.3.2 Reprocessing

3.1.9.3.3 Data Viewer

3.2 PERFORMANCE REQUIREMENTS

3.2.1 Coverage Volume

3.2.1.1 Surface Surveillance Coverage Volume

3.2.1.2 Extended Surveillance Coverage Volume

3.2.2 Target Detections

3.2.3 Resolution

3.2.4 Accuracy

3.2.5 Target Dynamics

3.2.6 Scan and Update Rate

3.2.7 False Tracks

3.2.8 Target Capacity

3.2.9 Latency

3.2.10 Tracking Performance

3.2.10.1 Track Association

3.2.10.2 Track Merge and Unmerge

3.2.11 Startup and Recovery

3.2.12 Fault Isolation

3.3 RELIABILITY, MAINTAINABILITY, AND AVAILABILITY (RMA) REQUIREMENTS

3.4 INTEGRATION REQUIREMENTS

3.4.1 Physical Integration

3.4.1.1 Environmental Requirements

3.4.1.1.1 Outdoor Requirements

3.4.1.1.2 Indoor Requirements

3.4.1.1.3 Non-Operating Requirements

3.4.1.2 Land and Facility

3.4.1.2.1 Antenna Assembly

3.4.1.2.2 Cabinet and Frame Design

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3.4.1.2.3 Outdoor Equipment

3.4.1.2.4 Nameplates & Marking

3.4.1.2.5 Accessibility

3.4.1.2.6 Grounding, Bonding, Shielding, Lightning Protection, Cables, Power, and

Heating, Ventilation, and Air Conditioning (HVAC)

3.4.1.2.7 Energy and Water Conservation

3.4.1.2.8 Hazardous Materials

3.4.1.3 Seismic Requirements

3.4.2 Functional Integration

3.4.2.1 Interfaces to Other FAA Enterprise Architecture Elements

3.4.2.2 External Interfaces

3.4.2.3 Spectrum Requirements

3.4.3 Human Factors

3.4.4 Employee Safety and Health

3.4.4.1 General Requirements

3.4.4.2 Material Handling

3.4.4.3 Occupational Noise

3.5 SECURITY AND SAFETY REQUIREMENTS

3.5.1 Operating System

3.5.2 Information Systems Security

3.5.2.1 Access Control

3.5.2.2 Audit and Accountability

3.5.2.3 Configuration Management

3.5.2.4 System and Services Acquisition

3.5.2.5 System Communication Protection

3.5.2.6 System Information and Integrity

3.5.3 System Safety

3.6 QUALITY AND CONFIGURATION MANAGEMENT REQUIREMENTS

3.6.1 Quality Assurance

3.6.2 Configuration Management

3.7 TEST AND EVALUATION REQUIREMENTS

APPENDIX A – ACRONYMS

APPENDIX B – GLOSSARY

APPENDIX C – VERIFICATION REQUIREMENTS TRACEABILITY MATRIX (VRTM)

APPENDIX D – SMR4 ACCESS CONTROL LIST MATRIX

List of Figures Figure 1–1: SMR Block Diagram

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Document Version Control Log Origination/Revision

Number Effective Date Sections Affected Changes Made

- October 25, 2024 All Baseline version for Screening for Information Request

(SIR)

Total Count = 458

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1 SCOPE

This document details the requirements for the Surface Movement Radar, Model 4 (SMR4) system that the Federal Aviation Administration (FAA) will acquire under the Airport Surface Detection Equipment, Model 3 (ASDE-3) Surface Movement Radar (SMR) Replacement project. This specification identifies the functional and performance requirements of a non-cooperative radar system that will replace existing ASDE-3 SMRs. The SMR4 will provide non-cooperative surveillance of aircraft and vehicles on the airport movement area (AMA) as a fully integrated subsystem of the FAA’s existing Surface Surveillance Systems. The existing Surface Surveillance Systems include Airport Surface Detection Equipment, Model X (ASDE-X), and Airport Surface Surveillance Capability (ASSC).

1.1 Introduction

The FAA is dedicated to the goal of enhancing runway safety while maximizing operational efficiency and ensuring airport capacity. The reduction of runway incursions has been identified as one of the most important aviation safety initiatives and is crucial for the improvement of runway safety. The FAA Surface Surveillance Systems are currently deployed at larger airports throughout the National Airspace System (NAS) to provide the surface surveillance capability that enhances situational awareness for air traffic controllers (ATC). The safety logic incorporated into these systems aids in the real-time detection and alerting of potential runway collisions.

The FAA Surface Surveillance Systems use cooperative and non-cooperative surveillance sensors to detect and track aircraft and vehicles within the AMA. Cooperative surveillance sensors rely on aircraft transponder and vehicle transmitter transmissions to determine position and identity.

Non-cooperative surveillance sensors are not reliant on any type of active transmission from a target via transponder/avionics for position determination.

ASDE-3 SMRs are currently used for non-cooperative target detection at 18 ASDE-X and 9 ASSC airports. These SMR subsystems have been operational in the NAS for 20 to 30 years and are beyond the manufacturer’s end-of-life expectancy. In addition, there are several obsolete parts and supportability issues in operational systems. Due to these issues, the ASDE-3 SMRs are no longer sustainable, requiring a full replacement with newer technology that can meet the operational requirements of the FAA. The ASDE-3 SMR Replacement project will replace ASDE-3 SMRs with a new, sustainable commercial SMR, designated as the SMR4.

The SMR4 will provide the technological updates necessary to maintain the current levels of performance, availability, and reliability of the surface surveillance solutions deployed today.

Without this service, there will be gaps in surveillance coverage which may create potential hazards. Sustaining the non-cooperative surveillance capability will play a significant role in maintaining the current level of safety and efficiency at airports with an ASDE-X or ASSC system.

1.2 Description

The ASDE-X and ASSC systems are used by ATC to augment visual observation of aircraft and vehicles on runways and taxiways, or other parts of the movement area, as well as airborne aircraft on approach or departure. The SMR4 equipment will be deployed throughout the NAS

FAA-E-37024, Rev. 0, October 25, 2024 Page 2 of 98 and will interface with the Multi-Sensor Data Processor (MSDP) processor of the installed Surface Surveillance System in the same manner as the currently fielded SMRs. The SMR4 will provide the technological updates necessary to maintain the current levels of performance, availability, and reliability of the deployed surface surveillance solutions.

Within each Surface Surveillance System, one or more SMRs provide target reports to the MSDP subsystem through ethernet interfaces with a redundant Local Area Network (LAN) communications system. The MSDP fuses the SMR data with Multilateration (MLAT) and Airport Surveillance Radar (ASR) sensor data, as well as ADS-B position information from Surveillance Broadcast Services (SBS), to provide ATC with the location of aircraft and vehicles on the Surface Surveillance System controller display. The MSDP performs safety logic processing to alert controllers of potential collisions. Figure 1–1 shows a simplified block diagram of the current SMR subsystems.

Figure 1–1: SMR Block Diagram

1.3 Constraints

There are two (2) different Surface Surveillance Systems that the SMR4 will need to interface and integrate with:

• Airport Surface Detection Equipment, Model X (ASDE-X)

• Airport Surface Surveillance Capability (ASSC)

To minimize interruptions in service to the greatest extent practicable during installation and Site Acceptance Testing (SAT), the SMR4 will interface with an FAA provided test system. These test systems are referred to as either a mini ASDE-X or a mini ASSC.

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2 APPLICABLE DOCUMENTS

2.1 General

The documents listed in Section 2 contain the references from requirements in Section 3.

a) Copies of FAA specifications and interface documents may be obtained from the FAA, Headquarters Public Inquiry Center APA-230, 800 Independence Avenue SW, Washington, DC 20591, 202-267-3484. Requests should fully identify the material desired and cite the solicitation or contract number.

b) Requests for security-related documents should be addressed to the FAA Contracting Officer (CO). Requests should fully identify the material desired and cite the solicitation or contract number.

c) Military Standards and Specifications can be ordered from the Department of Defense Single Stock Point (DODSSP), Building 4/Section D, 700 Robbins Avenue, Philadelphia, PA 19111-5098. Information is available at their website, http://dodssp.daps.dla.mil.

2.2 Government Documents

Ref No Name/Number Description

1. 29 CFR 1910 Occupational Safety and Health Standards (General Industry)

2. 29 CFR 1910 Subpart D Occupational Safety and Health Standards: Walking-Working Surfaces

3. 29 CFR 1910 Subpart J Occupational Safety and Health Standards: General Environmental Controls

4. 29 CFR 1910.1200 Occupational Safety and Health Standards: Hazard Communication

5. 40 CFR Part 82 Protection of Stratospheric Ozone

6. 40 CFR Part 761 Polychlorinated Biphenyls (PCBs) Manufacturing, Processing, Distribution in Commerce, and Use Prohibitions

7. 47 CFR Part 300 Manual of Regulations and Procedures for Federal Radio Frequency Management, Section 5.5, Radar Spectrum Engineering Criteria (RSEC)

8. FAA-G-2100J Electronic Equipment, General Requirements

9. FAA HF-STD-001B Human Factors Design Standard

10. FAA HF-STD-003 Alarms and Alerts in the Technical Operations Environment

11. FAA Order 1050.1F Environmental Impacts: Policies and Procedures

12. FAA Order 1370.121B FAA Information Security and Privacy Policy: FAA Implementation of NIST Controls (FAA Order 1370.121B Supplemental Implementing Directive)

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13. FAA Order 3900.19C Federal Aviation Administration (FAA) Occupational Safety and Health (OSH) Policy

14. FAA Order JO 1050.17B Environmental Compliance at Air Traffic Organization Facilities

15. FAA Order JO 6950.2E, Chg 1

Electrical Power Policy Implementation at National Airspace Facilities

16. FAA-STD-019F, Chg 3 Lightning and Surge Protection, Grounding, Bonding and Shielding Requirements for Facilities and Equipment

17. Federal Emergency Management Agency

(FEMA) P-2082

National Earthquake Hazards Reduction Program (NEHRP) Recommended Seismic Provisions for New Buildings and Other Structures

18. FIPS 140-3 Security Requirements for Cryptographic Modules

19. MIL-STD-461G Department of Defense, Interface Standard Requirements for the Control of Electromagnetic Interference Characteristics of Subsystems and Equipment

20. NIST 800-53, revision 5 Security and Privacy Controls for Information Systems and Organizations

21. NAS-IR-nnnnnnn Surface Movement Radar, Model 4 (SMR4) to Airport Surface Detection Equipment, Model X (ASDE-X) and Airport Surface Surveillance Capability (ASSC) Interface Requirements Document (IRD)

2.3 Non-Government Documents

Ref No Number Description

1. ANSI Z535.4-2011 (R2017) American National Standard for Product Safety Signs and Labels

2. ANSI Z535.2-2011 (R2017) Environmental and Facility Safety Signs

3. ASCE/SEI 7-22 America Society of Civil Engineers/Structural Engineering Institute (ASCE/SEI) Minimum Design Loads and Associated Criteria for Buildings and Other Structures

4. IEEE 1588-2019 IEEE Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems

5. IETF RFC-2865 Remote Authentication Dial-In User Service (RADIUS)

6. IETF RFC-5905 Network Time Protocol Version 4: Protocol and Algorithms Specification

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2.4 Order of Precedence

The above documents form a part of this System Specification to the extent specified herein. In the event of conflict between the documents referenced herein and the contents of this System Specification, this System Specification will be considered the superseding requirement.

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3 REQUIREMENTS

This document uses ‘must’ as the mandatory imperative in requirement statements. Use of ‘must’ as the mandatory imperative complies with Federal Plain Language Guidelines, March 2011 Revision 1, May 2011 and the FAA Plain Language Toolkit accessible from FAA Plain Language Website: https://www.faa.gov/about/initiatives/plain_language.

Within the requirements of this specification, when the words “AND” and “OR” appear in capital letters, they are being used as logical operators defined as follows:

• AND – all the conditions of the requirement must be mandatory.

• OR – one or more of the conditions in the requirement must be mandatory. Additionally, all permutations must be exercised.

Within the requirements of the SMR4 specification, when an element of a document is referenced such as a Subsection, Section, Paragraph, or Chapter, all subordinate Subsections, Sections, Paragraphs, or Chapters to the referenced element are applicable.

Terms that are capitalized and italicized (e.g., Operational State, Confirmed Track) within the requirements in this document are defined in the Glossary in Appendix B. Definitions provided in the Glossary are considered part of the requirements in which the associated term is used.

https://www.faa.gov/about/initiatives/plain_language

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3.1 Functional Requirements

This section provides the SMR4 functional requirements.

3.1.1 Detection and Processing

3.1.1.1 Target Detection

[SMR4-SPEC-SR001] The SMR4 must detect Targets that are in the Airport Movement Area

AND are within the Coverage Volume specified in Section 3.2.1.

[SMR4-SPEC-SR002] The SMR4 must detect Targets during weather conditions that include any form of Atmospheric Moisture.

3.1.1.2 Noise and Clutter Rejection

[SMR4-SPEC-SR003] The SMR4 must employ methods to prevent the generation of Target

Reports from Static Clutter of any size within the Coverage Volume specified in Section 3.2.1.

[SMR4-SPEC-SR004] The SMR4 must maintain the Target Detection performance specified in Section 3.2.2 in areas where Static Clutter is being suppressed.

[SMR4-SPEC-SR005] The SMR4 must employ methods to prevent the generation of Target Reports from Multiple Time Around Returns.

[SMR4-SPEC-SR006] The SMR4 must maintain the Target Detection performance specified in Section 3.2.2 in areas where Multiple Time Around Returns are being suppressed.

[SMR4-SPEC-SR007] The SMR4 must employ methods to prevent the generation of Target Reports from Time Sidelobes when pulse compression techniques are utilized.

[SMR4-SPEC-SR008] The SMR4 must maintain the Target Detection performance specified in Section 3.2.2 in areas where Time Sidelobes are being suppressed.

[SMR4-SPEC-SR009] The SMR4 must employ methods to prevent the generation of Target Reports resulting from Transients in the system.

3.1.1.3 Weather Processing

[SMR4-SPEC-SR010] The SMR4 must meet the Target Detection performance specified in

Section 3.2.2 at transitions between clear weather and Atmospheric Moisture.

[SMR4-SPEC-SR011] The SMR4 must meet the Target Detection performance specified in Section 3.2.2 through transitions of gradient Atmospheric Moisture.

[SMR4-SPEC-SR012] The SMR4 must meet the False Tracks performance specified in Section 3.2.7 at transitions between clear weather and Atmospheric Moisture.

[SMR4-SPEC-SR013] The SMR4 must meet the False Tracks performance specified in Section 3.2.7 through transitions of gradient Atmospheric Moisture.

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3.1.1.4 Environment

[SMR4-SPEC-SR014] The SMR4 must meet all Performance Requirements in Section 3.2 while operating in an environment with other sources of radio frequency interference.

[SMR4-SPEC-SR015] The SMR4 must meet all Performance Requirements in Section 3.2 while operating in an environment consisting of up to four (4) Surface Movement Radars operating within the same frequency band.

[SMR4-SPEC-SR016] The SMR4 must meet Accuracy Requirements in Section 3.2.4 while the Antenna Subsystem is operating in an outdoor environment as specified in Section 3.4.1.1.1.

[SMR4-SPEC-SR017] The SMR4 must employ methods to prevent ice build-up on its antenna.

3.1.1.5 Multipath Detection

[SMR4-SPEC-SR018] The SMR4 must employ processing to identify multipath False Targets while meeting Target Detection requirements in Section 3.2.2.

[SMR4-SPEC-SR019] The SMR4 multipath processing must be adaptable using both Global

Parameters AND Region Based Parameters.

[SMR4-SPEC-SR020] The SMR4 must be configurable to either enable or disable the dissemination of Target Reports for Plots that have been identified as multipath False Targets by radar data processing.

3.1.1.6 Suppression and Blanking

[SMR4-SPEC-SR021] The SMR4 must be site adaptable to suppress the processing of radar signal returns within user-defined Suppression Regions.

[SMR4-SPEC-SR022] The SMR4 Maintenance Terminal must provide a graphical user interface for definition of Suppression Regions.

[SMR4-SPEC-SR023] The SMR4 must be site adaptable to inhibit radio frequency transmission when the peak of the antenna’s transmit beam is within a user-defined transmitter blanking sector.

[SMR4-SPEC-SR024] The SMR4 Maintenance Terminal must provide a graphical user interface for definition of transmitter blanking sectors.

[SMR4-SPEC-SR025] The SMR4 must provide at least eight (8) individual transmitter blanking sectors located anywhere within the 360 degrees of antenna coverage.

[SMR4-SPEC-SR026] The SMR4 transmitter blanking sectors must have an azimuth resolution of less than or equal to 1 degree.

3.1.1.7 Plot Detection

[SMR4-SPEC-SR027] The SMR4 must extract Plot Data from processed Raw Video.

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[SMR4-SPEC-SR028] The SMR4 Plot extractor must be adaptable using Region Based Parameters.

[SMR4-SPEC-SR029] The SMR4 Plot extractor Region Based Parameters must include adaptable amplitude thresholds that control Plot detection based on Raw Video amplitude.

[SMR4-SPEC-SR030] The SMR4 Plot extractor Region Based Parameters must include adaptable size thresholds that control Plot extraction based on the size of associated Radar Cells exceeding Plot detection thresholds.

3.1.1.8 Target Tracking

[SMR4-SPEC-SR031] The SMR4 must use Plot Data to initiate tracks on all newly detected

Targets within the Coverage Volume specified in Section 3.2.1.

[SMR4-SPEC-SR032] The SMR4 must use Plot Data to update tracks on all existing Targets within the Coverage Volume specified in Section 3.2.1.

[SMR4-SPEC-SR033] The SMR4 must assign each newly Confirmed Track a track number that is unique with respect to existing Confirmed Tracks.

[SMR4-SPEC-SR034] The SMR4 tracker must maintain a track that loses Plot Data for an adaptable number of missing updates before terminating the track.

[SMR4-SPEC-SR035] The SMR4 must employ methods to prevent Split Tracks from being disseminated as multiple Target Reports.

[SMR4-SPEC-SR036] The SMR4 tracker must be site adaptable.

3.1.2 Multiple Surface Movement Radar Configuration

[SMR4-SPEC-SR037] The SMR4 design must support a multiple Surface Movement Radar configuration consisting of up to four SMR4s installed as subsystems of a single Surface Surveillance System.

[SMR4-SPEC-SR038] In a multiple Surface Movement Radar configuration, each SMR4 must meet all Performance Requirements in Section 3.2.

[SMR4-SPEC-SR039] In a multiple Surface Movement Radar configuration, each SMR4 must be stand-alone without sharing Operational Hardware.

[SMR4-SPEC-SR040] In a multiple Surface Movement Radar configuration, each SMR4 must include a unique System Identification Code (SIC) in each external message in accordance with the SMR4 to ASDE-X and ASSC Interface Requirements Document (IRD), NAS-IR-nnnnnnn.

[SMR4-SPEC-SR041] In a multiple Surface Movement Radar configuration, each SMR4 must be individually addressable from any common Control Point.

3.1.3 External Interfaces

[SMR4-SPEC-SR042] The SMR4 must interface with the existing FAA Surface Surveillance

Systems in accordance with the SMR4 to ASDE-X and ASSC Interface Requirements Document (IRD), NAS-IR-nnnnnnn.

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[SMR4-SPEC-SR043] The SMR4 external interface must be configurable to designate approved source Internet Protocol (IP) addresses.

[SMR4-SPEC-SR044] The SMR4 external interface must be configurable to designate approved protocols.

[SMR4-SPEC-SR045] The SMR4 external interface must be configurable to designate approved destination port numbers.

3.1.3.1 Data Outputs

[SMR4-SPEC-SR046] The SMR4 must output Target Reports to the Surface Surveillance

Systems in accordance with the SMR4 to ASDE-X and ASSC Interface Requirements Document (IRD), NAS-IR-nnnnnnn.

[SMR4-SPEC-SR047] When updated Target data is available, the SMR4 must output updated Target Reports to the Surface Surveillance System regardless of the SMR4 System Status.

[SMR4-SPEC-SR048] The SMR4 must output a North Mark Message to the Surface Surveillance System each time the antenna boresight passes True North in accordance with the SMR4 to ASDE-X and ASSC Interface Requirements Document (IRD), NAS-IR-nnnnnnn.

[SMR4-SPEC-SR049] The SMR4 must output Monobit Video to the Surface Surveillance System in accordance with the SMR4 to ASDE-X and ASSC Interface Requirements Document (IRD), NAS-IR-nnnnnnn.

[SMR4-SPEC-SR050] SMR4 Monobit Video data must have a resolution equal to one Radar Cell.

[SMR4-SPEC-SR051] The SMR4 must report System Status to the Surface Surveillance System in an Operational Status Report in accordance with the SMR4 to ASDE-X and ASSC Interface Requirements Document (IRD), NAS- IR-nnnnnnn.

[SMR4-SPEC-SR052] The SMR4 must report Detailed Status to the Surface Surveillance System in a Detailed Status Report in accordance with the SMR4 to ASDE-X and ASSC Interface Requirements Document (IRD), NAS- IR-nnnnnnn.

3.1.3.2 Existing System Network

[SMR4-SPEC-SR053] All SMR4 local area network connected components must support

Internet Protocol Version 4 (IPV4) AND Internet Protocol Version 6

(IPV6).

[SMR4-SPEC-SR054] The SMR4 must communicate with the Surface Surveillance Systems over their redundant Local Area Networks (LANs).

[SMR4-SPEC-SR055] SMR4 Internet Protocol (IP) address assignment(s) must be site configurable.

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[SMR4-SPEC-SR056] SMR4 transport layer port number assignment(s) must be site adaptable.

3.1.3.3 Time Synchronization

[SMR4-SPEC-SR057] The SMR4 must synchronize its subsystem components to the

Coordinated Universal Time (UTC) service used by the Surface Surveillance System.

[SMR4-SPEC-SR058] The SMR4 must be configurable to use a Network Time Protocol (NTP) service compliant with IETF RFC-5905 for system time synchronization.

[SMR4-SPEC-SR059] The SMR4 must be configurable to use a Precision Time Protocol (PTP) service compliant with IEEE 1588-2019 standard for system time synchronization.

[SMR4-SPEC-SR060] The SMR4 must include a timestamp in all messages using Coordinated Universal Time (UTC).

3.1.4 System Startup

[SMR4-SPEC-SR061] The SMR4 must automatically initialize all Operational Parameters to the current locally stored site adaptation during System Startup.

[SMR4-SPEC-SR062] SMR4 antenna rotation must remain unchanged during System Startup until a rotation command is manually initiated.

[SMR4-SPEC-SR063] The SMR4 transmitter must be disabled during System Startup until a transmit start command is manually initiated.

[SMR4-SPEC-SR064] The SMR4 must perform system diagnostics to verify System Integrity during System Startup.

[SMR4-SPEC-SR065] The SMR4 System Status must be Offline during System Startup until the system has reached an Operational State.

3.1.5 System Control

[SMR4-SPEC-SR066] The SMR4 must receive the System Mode message provided by the

Surface Surveillance System in accordance with the SMR4 to ASDE-X and ASSC Interface Requirements Document (IRD), NAS-IR-nnnnnnn.

[SMR4-SPEC-SR067] At all times, the SMR4 Maintenance Terminal must display the current System Mode of the Surface Surveillance System.

[SMR4-SPEC-SR068] While the Surface Surveillance System is in operational mode, the SMR4 must inhibit processing of user-initiated commands that impact system performance from any control point.

[SMR4-SPEC-SR069] While the Surface Surveillance System is in operational mode, the SMR4 must disable all controls that impact system performance on the Maintenance Terminal graphical user interface.

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[SMR4-SPEC-SR070] While the Surface Surveillance System is in maintenance mode, the SMR4 must process all user-initiated commands from any control point.

[SMR4-SPEC-SR071] While the Surface Surveillance System is in maintenance mode, the SMR4 must enable all controls on the Maintenance Terminal graphical user interface.

[SMR4-SPEC-SR072] If the SMR4 does not receive a valid System Mode message from Surface Surveillance System within 5 seconds, it must declare an interface fault and place the SMR4 into Maintenance Mode until a valid System Mode message is received from the Surface Surveillance System.

3.1.5.1 Command and Control

[SMR4-SPEC-SR073] The SMR4 must process Control Commands received from any valid

Control Point.

[SMR4-SPEC-SR074] The SMR4 Maintenance Terminal graphical user interface must include controls for all Control Commands.

[SMR4-SPEC-SR075] The SMR4 must receive Control Commands from the Surface

Surveillance System in accordance with the SMR4 to ASDE-X and ASSC Interface Requirements Document (IRD), NAS-IR-nnnnnnn.

3.1.5.2 Command Processing

[SMR4-SPEC-SR076] When the SMR4 receives a start antenna rotation command, it must initiate antenna rotation unless antenna rotation is inhibited.

[SMR4-SPEC-SR077] When the SMR4 receives a stop antenna rotation command, it must disable antenna rotation.

[SMR4-SPEC-SR078] When the SMR4 receives a transmit start command, it must start radiating transmit pulses unless transmission is inhibited.

[SMR4-SPEC-SR079] When the SMR4 receives a transmit stop command, it must stop radiating transmit pulses.

[SMR4-SPEC-SR080] When the SMR4 receives a system reset command, it must restart all applications running on the radar system.

[SMR4-SPEC-SR081] When the SMR4 receives a system reboot command, it must reboot all system processors.

[SMR4-SPEC-SR082] When the SMR4 receives a system shutdown command, it must disable antenna rotation AND shut down all radar system processors.

[SMR4-SPEC-SR083] When the SMR4 receives a processor reset command, it must restart the applications running on the specified processor.

[SMR4-SPEC-SR084] When the SMR4 receives a processor reboot command, it must reboot the specified processor.

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[SMR4-SPEC-SR085] When the SMR4 receives a processor shutdown command, it must power down the specified processor.

[SMR4-SPEC-SR086] When the SMR4 receives a clear fault command, it must clear all system fault indications.

[SMR4-SPEC-SR087] When the SMR4 receives a channel select command, it must make the specified channel the selected channel AND connect it to the Antenna Subsystem.

[SMR4-SPEC-SR088] When the SMR4 receives a Redundant Element switch command, it must switch to the specified Redundant Element making it Online.

[SMR4-SPEC-SR089] When the SMR4 receives a System Go command, it must initiate antenna rotation, connect the selected channel to the Antenna Subsystem, AND start radiating transmit pulses unless the system is inhibited from performing these actions.

[SMR4-SPEC-SR090] When the SMR4 receives a System Stop command, it must disable antenna rotation AND stop radiating transmit pulses.

[SMR4-SPEC-SR091] When the SMR4 receives an Antenna Select command, it must connect the selected channel to the Antenna Subsystem.

[SMR4-SPEC-SR092] When the SMR4 receives a Dummy Load Select command, it must connect the selected channel to the dummy load.

3.1.5.3 Closed Regions

[SMR4-SPEC-SR093] The SMR4 must receive Closed Region messages from the Surface

Surveillance System in accordance with the SMR4 to ASDE-X and ASSC Interface Requirements Document (IRD), NAS-IR-nnnnnnn.

[SMR4-SPEC-SR094] When the SMR4 receives a Closed Region add command, it must create a Target Inhibit Region using the information contained within the Closed Region message.

[SMR4-SPEC-SR095] The SMR4 must inhibit the dissemination of Target Reports for any Target located within any Target Inhibit Region.

[SMR4-SPEC-SR096] The SMR4 must maintain Target Inhibit Regions until a Closed Region delete message is received from the Surface Surveillance System.

[SMR4-SPEC-SR097] When the SMR4 receives a Closed Region delete message, it must delete the Target Inhibit Region that matches the region identification in the Closed Region message.

[SMR4-SPEC-SR098] When the SMR4 receives a remove all Closed Regions message, it must delete all Target Inhibit Regions.

[SMR4-SPEC-SR099] The SMR4 must calculate a Target Inhibit Region checksum by computing the exclusive or of all 32-bit longwords representing all x-y polygon points from all Target Inhibit Regions.

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[SMR4-SPEC-SR100] The SMR4 must include the Target Inhibit Region checksum in the Detailed Status Report.

3.1.6 System Monitoring

3.1.6.1 Performance Monitoring

[SMR4-SPEC-SR101] The SMR4 must perform real-time automatic system performance monitoring.

[SMR4-SPEC-SR102] SMR4 system performance monitoring must include a Transceiver

Performance Monitor.

[SMR4-SPEC-SR103] SMR4 system performance monitoring must include an Antenna

Performance Monitor.

[SMR4-SPEC-SR104] SMR4 system performance monitoring must include a Processor

Performance Monitor.

[SMR4-SPEC-SR105] The SMR4 must report the results of all automated system performance tests in the system performance monitoring data.

[SMR4-SPEC-SR106] The SMR4 Maintenance Terminal graphical user interface must display all system performance monitoring data.

[SMR4-SPEC-SR107] The SMR4 must include the results of all system performance monitoring tests in the Detailed Status Report.

[SMR4-SPEC-SR108] The SMR4 must include the results of all periodic statistics in the

Detailed Status Report.

3.1.6.2 Status Monitoring

[SMR4-SPEC-SR109] The SMR4 must include a System Integrity check to determine System

Status.

[SMR4-SPEC-SR110] The SMR4 Maintenance Terminal graphical user interface must display

System Status.

[SMR4-SPEC-SR111] The SMR4 must use a monitoring function to determine the Operating

Status of all Redundant Elements.

[SMR4-SPEC-SR112] The SMR4 Maintenance Terminal graphical user interface must display the Operating Status of Redundant Elements.

[SMR4-SPEC-SR113] The SMR4 must include the Operating Status of all Redundant

Elements in the Detailed Status Report.

3.1.6.3 Fault Detection and Isolation

[SMR4-SPEC-SR114] The SMR4 must provide Built-in Test (BIT) functionality that automatically detects failures to the Line Replaceable Unit level.

[SMR4-SPEC-SR115] SMR4 Built-in Test (BIT) functionality must include checksum monitoring of the system adaptation.

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[SMR4-SPEC-SR116] SMR4 Built-in Test (BIT) functionality must include checksum monitoring of the system software.

[SMR4-SPEC-SR117] If the SMR4 Built-in Test (BIT) detects a checksum mismatch, it must declare a Critical Fault.

[SMR4-SPEC-SR118] The SMR4 must include all calculated checksum values in the Detailed Status Report.

[SMR4-SPEC-SR119] The SMR4 Maintenance Terminal graphical user interface must display the Operational Health of Line Replaceable Units as determined by the Built-In Test (BIT) functionality.

[SMR4-SPEC-SR120] The SMR4 must include the Operational Health of each Line Replaceable Unit in the Detailed Status Report.

[SMR4-SPEC-SR121] The SMR4 must implement automatic Fault Isolation Test (FIT) functionality to isolate faults detected by Built-In Test (BIT) to the Line Replaceable Unit level.

[SMR4-SPEC-SR122] The SMR4 Maintenance Terminal graphical user interface must display results of Fault Isolation Tests (FIT).

[SMR4-SPEC-SR123] The SMR4 Maintenance Terminal graphical user interface must display System Fault Data.

[SMR4-SPEC-SR124] The presentation of SMR4 System Fault Data on the Maintenance Terminal must persist until a clear fault command is issued, even if the underlying fault condition has cleared.

[SMR4-SPEC-SR125] The SMR4 must classify each fault condition as either a Critical Fault OR a Non-Critical Fault.

3.1.6.4 Failover

[SMR4-SPEC-SR126] If the SMR4 includes Redundant Elements, it must automatically failover to the Standby element when a failure is detected in the Online element.

[SMR4-SPEC-SR127] If an SMR4 failover causes clutter processes to restart, the SMR4’s System Status must be Offline until the system has reached an Operational State.

[SMR4-SPEC-SR128] If the SMR4 allows multiple failovers without a maintenance action, it must include site adaptable failover limits.

[SMR4-SPEC-SR129] When the adaptable failover limit is reached, the SMR4 must inhibit automatic failovers until a clear faults command is issued.

[SMR4-SPEC-SR130] SMR4 site adaptable failover limits must be specified as an adaptable number of failovers allowed within an adaptable time.

[SMR4-SPEC-SR131] SMR4 site adaptable failover limits must allow for a minimum of one failover.

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3.1.6.5 Data Logging

[SMR4-SPEC-SR132] The SMR4 must automatically record System Status changes to a system status log.

[SMR4-SPEC-SR133] The SMR4 must retain recorded System Status data in the system status log for a minimum of the last 45 days.

[SMR4-SPEC-SR134] The SMR4 must automatically record System Fault Data to a system fault log.

[SMR4-SPEC-SR135] The SMR4 must retain recorded System Fault Data in the system fault log for a minimum of the last 45 days.

[SMR4-SPEC-SR136] SMR4 log files must include a date for every record corresponding to the date of declaration of the event.

[SMR4-SPEC-SR137] SMR4 log files must include a Coordinated Universal Time (UTC) timestamp for every record corresponding to the time of declaration of the event.

3.1.7 Maintenance Terminal

[SMR4-SPEC-SR138] The SMR4 must provide a Maintenance Terminal for control AND monitoring of the radar system.

[SMR4-SPEC-SR139] The SMR4 must provide a local Maintenance Terminal workstation co-located with the transceiver equipment.

[SMR4-SPEC-SR140] The SMR4 must allow remote access to the Maintenance Terminal over the Internet Protocol interface with the Surface Surveillance System.

[SMR4-SPEC-SR141] The SMR4 Maintenance Terminal must provide a graphical user interface for controlling system operations.

[SMR4-SPEC-SR142] The SMR4 must obtain secondary verification from the user before performing any command issued from the Maintenance Terminal that alters radar performance.

[SMR4-SPEC-SR143] The SMR4 Maintenance Terminal graphical user interface must provide feedback to the user indicating the success/failure of all commands.

3.1.8 Antenna and Transmitter

3.1.8.1 Antenna Interlocks

[SMR4-SPEC-SR144] The SMR4 must include Antenna Subsystem interlocks for the safety of maintenance personnel.

[SMR4-SPEC-SR145] The SMR4 Maintenance Terminal graphical user interface must include the status of all Antenna Subsystem interlocks.

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[SMR4-SPEC-SR146] The SMR4 must include the status of each Antenna Subsystem interlock in the Detailed Status Report.

[SMR4-SPEC-SR147] The SMR4 must include a key interlock.

[SMR4-SPEC-SR148] The SMR4 key interlock must activate when the key is removed from its mounting location.

[SMR4-SPEC-SR149] The SMR4 key interlock must remain active until the key is restored to its mounting location.

[SMR4-SPEC-SR150] The SMR4 must include a hatch interlock.

[SMR4-SPEC-SR151] The SMR4 hatch interlock must activate when the tower hatch is opened.

[SMR4-SPEC-SR152] The SMR4 hatch interlock must remain active until the tower hatch is secured.

[SMR4-SPEC-SR153] The SMR4 must include a mechanical device to prevent antenna rotation.

[SMR4-SPEC-SR154] The SMR4 must include an interlock that activates when the mechanical device used to prevent antenna rotation is engaged.

[SMR4-SPEC-SR155] The SMR4 mechanical interlock must remain active until the mechanical interlock to stop antenna rotation is disengaged.

3.1.8.2 Antenna Rotation

[SMR4-SPEC-SR156] The SMR4 must automatically disable antenna rotation when the

Antenna Performance Monitor detects conditions that may damage the Antenna Subsystem.

[SMR4-SPEC-SR157] SMR4 antenna rotation must be disabled upon detection of any activated Antenna Subsystem interlock.

[SMR4-SPEC-SR158] SMR4 antenna rotation must be inhibited while there is an active Antenna Subsystem interlock.

[SMR4-SPEC-SR159] When the SMR4 antenna has been disabled, antenna rotation must remain disabled until a start rotation command is manually initiated.

3.1.8.3 Transmitter

[SMR4-SPEC-SR160] The SMR4 must automatically stop radio frequency transmissions through the antenna whenever an event causes the antenna rotation to become disabled.

[SMR4-SPEC-SR161] SMR4 radio frequency transmissions must be inhibited while there is an active Antenna Subsystem interlock.

[SMR4-SPEC-SR162] When the SMR4 transmitter is disabled, it must remain disabled until a transmit start command is initiated.

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3.1.8.4 Heated Array

[SMR4-SPEC-SR163] At FAA designated sites, the SMR4 must include a heated antenna array to prevent ice buildup.

[SMR4-SPEC-SR164] When installed with a heated array, the SMR4 Maintenance Terminal graphical user interface must indicate when the array heater is enabled.

[SMR4-SPEC-SR165] When installed with a heated array, the SMR4 Maintenance Terminal graphical user interface must include array heater controls allowing the user to select the operating mode of the array heaters as either automatic, on, or off.

[SMR4-SPEC-SR166] When the array heater control is in automatic mode, the SMR4 must automatically enable the array heaters when icing conditions are present.

[SMR4-SPEC-SR167] When the array heater control is in automatic mode, the SMR4 must automatically disable the array heaters when the icing conditions are no longer present.

[SMR4-SPEC-SR168] When the array heater control on mode is selected, the SMR4 must enable the array heater.

[SMR4-SPEC-SR169] When the array heater control off mode is selected, the SMR4 must disable the array heater.

[SMR4-SPEC-SR170] The SMR4 must meet all Performance Requirements in Section 3.2 when operating with a heated array.

3.1.9 System Configuration and Utilities

3.1.9.1 Optimization, Verification, and Certification

[SMR4-SPEC-SR171] The SMR4 must include a directional coupler installed in line with the waveguide to support manual radio frequency measurements at the transceiver.

[SMR4-SPEC-SR172] The SMR4 directional coupler must permit the user to measure transceiver forward power output to the Antenna Subsystem.

[SMR4-SPEC-SR173] The SMR4 directional coupler must permit the user to measure the reflected power at the transceiver from the Antenna Subsystem.

[SMR4-SPEC-SR174] The SMR4 must include a dummy load capable of withstanding the full radiating power of the transmitter.

[SMR4-SPEC-SR175] The SMR4 must include an Antenna Waveguide Switch.

[SMR4-SPEC-SR176] The SMR4 Maintenance Terminal graphical user interface must indicate the position of the Antenna Waveguide Switch.

[SMR4-SPEC-SR177] The SMR4 must include the position of the Antenna Waveguide Switch in the Detailed Status Report.

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3.1.9.2 Adaptation

[SMR4-SPEC-SR178] The SMR4 must provide Adaptable Parameters that allow an installed system to be optimized to meet Performance Requirements specified in Section 3.2 while accounting for site specific conditions.

[SMR4-SPEC-SR179] The SMR4 must store a digital copy of all Adaptable Parameters on an internal local storage drive in one or more site adaptation files.

[SMR4-SPEC-SR180] The SMR4 must provide the capability to transfer all site adaptation files between the SMR4 and an external source over the Internet Protocol interface with the Surface Surveillance System.

[SMR4-SPEC-SR181] If the SMR4 design includes Sensitivity Time Control (STC), Sensitivity Time Control (STC) functionality must be site configurable.

[SMR4-SPEC-SR182] If the SMR4 design supports multiple Pulse Repetition Frequencies (PRF), selection of the operating Pulse Repetition Frequency (PRF) must be site configurable.

3.1.9.2.1 Adaptation Editor

[SMR4-SPEC-SR183] The SMR4 Maintenance Terminal must include an adaptation editor.

[SMR4-SPEC-SR184] The SMR4 adaptation editor must provide a graphical user interface for viewing all Global Parameters.

[SMR4-SPEC-SR185] The SMR4 adaptation editor must provide a graphical user interface for modifying all Global Parameters.

[SMR4-SPEC-SR186] The SMR4 adaptation editor must permit the user to load the adaptation currently being utilized by the system.

[SMR4-SPEC-SR187] The SMR4 adaptation editor must permit the user to overwrite the adaptation currently being utilized by the system.

[SMR4-SPEC-SR188] The SMR4 adaptation editor must permit the user to save its current loaded adaptation to a local file.

[SMR4-SPEC-SR189] The SMR4 adaptation editor must permit the user to load a local adaptation file.

[SMR4-SPEC-SR190] Before overwriting any adaption in use by the system, the SMR4 adaptation editor must perform Adaptation Validation of the adaptation being loaded.

3.1.9.2.2 Map Editing Utility

[SMR4-SPEC-SR191] The SMR4 must include a map editing utility permitting the user to define AND modify all processing map regions.

[SMR4-SPEC-SR192] The SMR4 must include a map editing utility permitting the user to define AND modify all processing map parameters.

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[SMR4-SPEC-SR193] The SMR4 map editing utility must permit the user to display airport maps as an overlay with the selected processing map(s).

[SMR4-SPEC-SR194] The SMR4 map editing utility must permit the user to save local copies of the processing maps.

[SMR4-SPEC-SR195] The SMR4 map editing utility must permit the user to load local copies of the processing maps.

[SMR4-SPEC-SR196] The SMR4 map editing utility must permit the user to upload processing maps to the system.

[SMR4-SPEC-SR197] The SMR4 map editing utility must permit the user to download processing maps from the system.

3.1.9.3 Data Utilities

3.1.9.3.1 Recording

[SMR4-SPEC-SR198] The SMR4 must include a Recording Utility.

[SMR4-SPEC-SR199] The SMR4 Recording Utility must permit the user to record all data and information necessary to support optimization AND verification of the radar performance.

[SMR4-SPEC-SR200] The SMR4 Maintenance Terminal must provide a graphical user interface for user control of the Recording Utility.

[SMR4-SPEC-SR201] The SMR4 Recording Utility must permit the user to start a recording.

[SMR4-SPEC-SR202] The SMR4 Recording Utility must permit the user to stop an active recording.

[SMR4-SPEC-SR203] The SMR4 Recording Utility must permit the user to specify the base file name of a data recording.

[SMR4-SPEC-SR204] The SMR4 Recording Utility must permit the user to specify the total time duration for a data recording.

[SMR4-SPEC-SR205] The SMR4 Recording Utility must permit the user to specify the time duration for each data recording segment.

[SMR4-SPEC-SR206] Upon a data recording segment reaching the user specified maximum time duration, the SMR4 Recording Utility must continue the recording in a new file using the base file name appended with a sequence number.

[SMR4-SPEC-SR207] The SMR4 Recording Utility must permit the user to select the Recorded Data Types to record.

[SMR4-SPEC-SR208] The SMR4 Recording Utility must write all recorded files to an internal local storage drive.

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[SMR4-SPEC-SR209] The SMR4 must have enough internal local drive space capacity to store up to 15 days of continuously recorded data files, including all Recorded Data Types except for Raw Video.

[SMR4-SPEC-SR210] The SMR4 Recording Utility must allow the user to record to an external storage device.

[SMR4-SPEC-SR211] The SMR4 Recording Utility must prevent data recording files from exceeding 90 percent of the maximum disk space capacity.

[SMR4-SPEC-SR212] Except for Raw Video, SMR4 data recordings must include a Coordinated Universal Time (UTC) timestamp for every record corresponding to the time of occurrence.

[SMR4-SPEC-SR213] The SMR4 must permit the user to download all recorded data files to an external location.

3.1.9.3.2 Reprocessing

[SMR4-SPEC-SR214] The SMR4 must include a Reprocessing Utility.

[SMR4-SPEC-SR215] The SMR4 Reprocessing Utility must permit the user to reprocess Raw

Video, Monobit Video, AND Plot Data.

[SMR4-SPEC-SR216] The SMR4 Maintenance Terminal must provide a graphical user interface for user control of the Reprocessing Utility.

[SMR4-SPEC-SR217] The SMR4 Reprocessing Utility must permit the user to select the data type to reprocess.

[SMR4-SPEC-SR218] The SMR4 Reprocessing Utility must permit the user to start a reprocessing session beginning at any stage of the radar processing supported by the recorded data.

[SMR4-SPEC-SR219] The SMR4 Reprocessing Utility must permit the user to end a reprocessing session.

[SMR4-SPEC-SR220] The SMR4 Reprocessing Utility must allow reprocessing of recorded data throughout the Coverage Volume.

[SMR4-SPEC-SR221] The SMR4 Reprocessing Utility must allow reprocessing of recorded data using modified site adaptation.

[SMR4-SPEC-SR222] The SMR4 Recording Utility must be functional while the Reprocessing Utility is reprocessing recorded data.

[SMR4-SPEC-SR223] While the SMR4 is actively reprocessing data, the SMR4 Maintenance Terminal graphical user interface must provide a visual indication that the SMR4 is in a reprocessing mode.

[SMR4-SPEC-SR224] While the SMR4 is actively reprocessing data, the Detailed Status Report must include an indication that the SMR4 is in a reprocessing mode.

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[SMR4-SPEC-SR225] While the SMR4 is actively reprocessing data, the SMR4 System Status must be Offline.

3.1.9.3.3 Data Viewer

[SMR4-SPEC-SR226] The SMR4 Maintenance Terminal must include a graphical surveillance display showing Surveillance Data within the Coverage Volume

[SMR4-SPEC-SR227] The SMR4 surveillance display must permit the user to view live Surveillance Data in real-time.

[SMR4-SPEC-SR228] The SMR4 surveillance display must permit the user to view reprocessed Surveillance Data in real-time.

[SMR4-SPEC-SR229] The SMR4 surveillance display must permit the user to view recorded Surveillance Data.

[SMR4-SPEC-SR230] The SMR4 surveillance display must permit the user to control local playback of recorded Surveillance Data.

[SMR4-SPEC-SR231] The SMR4 surveillance display must permit the user to display airport maps as an overlay with the Surveillance Data being viewed.

[SMR4-SPEC-SR232] The SMR4 surveillance display must permit the user to display processing maps as an overlay with the Surveillance Data being viewed.

[SMR4-SPEC-SR233] The SMR4 surveillance display must permit the user to zoom the view window.

[SMR4-SPEC-SR234] The SMR4 surveillance display must permit the user to pan the view window.

[SMR4-SPEC-SR235] The SMR4 surveillance display must include cursor feedback that identifies the location of cursor on the map in range AND azimuth.

[SMR4-SPEC-SR236] When viewing Raw Video, SMR4 cursor feedback must include the amplitude of the Radar Cell relative to the cursor.

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3.2 Performance Requirements

[SMR4-SPEC-SR237] While in an Operational State, the SMR4 must meet all Performance

Requirements.

3.2.1 Coverage Volume

3.2.1.1 Surface Surveillance Coverage Volume

[SMR4-SPEC-SR238] The SMR4 must provide surface surveillance coverage at slant ranges from 500 feet to 14,000 feet.

[SMR4-SPEC-SR239] The SMR4 must provide coverage from ground level to at least 200 feet above ground level over each runway for tower heights of 75 to 400 feet.

[SMR4-SPEC-SR240] The SMR4 must provide surface surveillance coverage in all azimuths.

3.2.1.2 Extended Surveillance Coverage Volume

[SMR4-SPEC-SR241] The SMR4 must provide extended surveillance coverage at slant ranges from 14,000 feet to 18,000 feet.

[SMR4-SPEC-SR242] The SMR4 must provide extended surveillance coverage in all azimuths.

3.2.2 Target Detections

[SMR4-SPEC-SR243] The SMR4 Probability of Detection in clear weather conditions must be greater than or equal to 95 percent for all Targets having a radar cross section greater than or equal to 1 m2 at any location on the Airport Movement Area within the Surface Surveillance Coverage Volume, specified in Section 3.2.1.1.

[SMR4…