TACAN Shore Based Antenna

Statement of Work (SOW) / Performance Work Statement (PWS)

This document establishes the performance, design, test, manufacture, and acceptance requirements for the TACAN Shore Based Antenna Group.

• The system consists of an electronically scanning antenna and a signal generating function.

• It operates in the 960 MHz to 1215 MHz frequency band.

• The antenna system interfaces with the existing AN/URN-32 TACAN Transponder without requiring changes to existing cabling.

• It receives aircraft interrogations and transmits replies for azimuth and distance information.

• Utilizes integral monitoring to provide signals to the transponder when a fault exists.

• Modulates 15 Hz and 135 Hz components for azimuth information.

• Generates North and auxiliary reference trigger pulses.

• Establishes a vertical radiation pattern for coverage requirements.

• Capable of operating in TACAN mode or Distance Measuring Equipment (DME)-only mode.

• Electrical Interface: Shall interface with AN/URN-32 TACAN Transponder using existing cables.

• North/Auxiliary Trigger: Shall interface as shown in Attachment 1.

• Shutdown Alarm: Indicates antenna system alarm status due to faults affecting azimuth accuracy.

• Soft Alarm: Provides indication of faults requiring maintenance.

• Antenna Pattern: Vertically polarized, omnidirectional horizontal pattern, with specific vertical field pattern requirements (main lobe width, gain on/below/above horizon).

• Modulation: Amplitude modulation of RF carrier according to a specified formula, with tolerances for frequency, deviation, and modulation percentages.

• Reference Bearing Signals: Two separate synchronized output trigger pulses (north and auxiliary).

• Trigger Pulse Characteristics: Specific shapes, rise times, fall times, widths, and amplitudes.

• Azimuth Alignment: Adjustable up to ±30 degrees, electronically controlled.

• RF Power Capacity: Handles 4000W peak power, 5% duty cycle.

• Impedance/VSWR: 50 Ω input impedance, 1.8:1 VSWR or less.

• Harmonic Content: Specific limits for second/third harmonics and intermodulation products.

• Monitoring: Detects azimuth accuracy faults, has internal RF monitoring capability.

• Hard Alarm Reporting: Generates shutdown alarm within 10 seconds of fault detection.

• Remote Maintenance Monitoring (RMM): Includes IP-enabled RMM port for diagnostics and reset.

• Equipment Startup: Fully operational within 45 seconds from cold start.

• Power Consumption: Not to exceed 300W.

• Radome: Insignia White (FED-STD-595 chip 17925).

• Size: ≤ 6 feet diameter, ≤ 11 feet height (including radome).

• Weight: ≤ 900 pounds (antenna structure only).

• Mounting: Steel support ring, corrosion mitigation, lifting points, permanent orientation marks, water intrusion prevention.

• Achieved Availability (AA): ≥ 0.99.

• Maintainability: Periodic inspections without removal, maintenance access panels, built-in-test for fault detection (>90%) and isolation (95% to 3 LURs, 99% to 1 LRU).

• Modular Construction: Onsite repairs using Line Replaceable Assets (LRAs) without unmounting.

• Software/Firmware Updates: Field updatable.

• Environmental Conditions: Compliant with MIL-STD-810H for temperature, altitude, vibration, shock, rain, wind, ice, humidity, sand/dust.

• Electromagnetic Environmental Effects (E3): Compliant with MIL-STD-464D and MIL-STD-461G for safety margins, EMC, RF EME, lightning, EMI, electrostatic environments, radiation hazards, life cycle E3, electrical bonding, and spectrum supportability.

• Interconnecting Cabling: Protected from elements, recessed connectors, grounding lug provided.

• Input Power: 120 VAC, 50-400 Hz, single phase; leakage current < 5 mA; power factor 0.7(lag) – 0.7(lead).

• Grounding: In accordance with MIL-HDBK-1857.

• Marking: Nameplates and marking per MIL-STD-130N.

• Safety: Personnel and electrical safety measures, including protection from sharp edges, hazardous gases, and electrical shock.

• Control Indicator Display: Meets MIL-STD-1472G requirements.

Not explicitly stated in this document, but implied to be shore-based.

• Compliance with numerous military standards (MIL-STD, MIL-HDBK).

• Specific performance metrics for antenna pattern, modulation, and signal integrity.

• Environmental and safety requirements are extensive.

• Attachment 1 (Transponder Group, TACAN AN/URN-32 Cable Running Sheets) is referenced for interface details.

Statement of Work (SOW)

This SOW outlines the Government's requirement for a Non-Developmental Item to replace the shore OE-258A Tactical Air Navigation (TACAN) antenna group, which is no longer supported and cannot be procured. The replacement must be compatible with the AN/URN-32 TACAN transponder.

• Procurement of a replacement shore TACAN antenna group.

• The antenna group shall consist of the antenna and the antenna control unit.

• Must meet the TACAN Shore Based Antenna Group Specification and other outlined requirements.

• Contractor shall produce, test, and deliver the antenna group.

• Requires adherence to various specifications including those for counterfeit parts, identification marking, and packaging.

• The antenna group must meet or exceed environmental requirements, withstand shock and vibration, and comply with Electromagnetic Environmental Effects (E3) standards as per the TACAN Shore Based Antenna Group Specification.

• Frequency certification is required in accordance with NTIA regulations.

• Rigorous testing is mandated, including First Article Testing (FAT) and Production Acceptance Testing (PAT).

• Fault detection, fault isolation, and false alarm rate requirements must be verified during FAT.

Not explicitly stated in the provided text, but implies production and delivery.

• Cybersecurity: Contractor must develop a Program Security Implementation Plan (PSIP) and a Cybersecurity Vulnerability Report. Minimum Cybersecurity Maturity Model Certification Level 2 is required.

• Logistics: Comprehensive logistics and product support requirements, including Bill of Materials (BOM), Provisioning Technical Documentation (PTD), Engineering Data for Provisioning (EDFP), and a Technical Data Package (TDP).

• Counterfeit Prevention: Implement a system to detect and avoid counterfeit electronic parts (SAE AS5553D) and other counterfeit materials (SAE AS6174A).

• Training: Provide a Training Development Program for operational and maintenance personnel, including courseware and technical training equipment.

• Data Rights: Government requires unlimited rights in any material first produced.

• Warranty: Minimum one-year warranty after installation.

• Safety: Antenna group must not comprise toxic chemicals or hazardous materials and must not be produced using environmentally detrimental processes.

• Configuration Management: Maintain a Configuration Management (CM) program IAW EIA-649-1 and PMA-213 CM Plan.

• Antenna group

• Various reports and plans (e.g., FAT Report, PAT Plan, QA Program Plan, Cybersecurity Reports, Logistics Product Data, Technical Manuals, Training Program Structure Document).

• CDRLs (Contract Data Requirements Lists) are specified for numerous deliverables.

Form / Attachment / Pricing Sheet

This document provides detailed cable running sheets and signal parameter specifications for the Transponder Group, TACAN AN/URN-32.

• Cable Designations: Details specific cable types (e.g., MIL-C-915/49, MIL-C-915/45) and their designations (e.g., R-RN(4), R-RN(8)).
• Connector Pinouts: Lists pin numbers, color codes, and corresponding functions for Unit A and Unit B connectors (e.g., MS3406D28-21S, MS3456W165S-1P W/BS).
• Signal Parameters: For each signal, specifies application, type (e.g., signal, control, bias), voltage, current, PRF, rise/fall times, and other characteristics (min/normal/max values).
• Notes: Includes specific instructions for cable usage, EMI backshells, and tie-back wires.

This document is critical for bidders to understand the electrical interface requirements and signal specifications of the TACAN AN/URN-32 system. It will inform the design, manufacturing, and testing of any related components or systems, ensuring compatibility and proper functionality. Bidders should pay close attention to the detailed pinouts and signal parameters to ensure their proposed solution meets all technical requirements.