The Safran Navigation & Timing documentation highlights three primary message types utilized in the GSSIP format (specifically version ICD-GPS-153C): A. Current Status (Message 5040) 1 Hz (once per second)
Unlike commercial systems that rely strictly on standard civil formats, military systems require low-latency, deterministic data pipelines. The protocol meets these demands by serving as a core interface specification. It bridges Ground-Based GPS Receiver Modules (GB-GRAM) or Selective Availability Anti-Spoofing Modules (SAASM) with hostile weapon, target acquisition, and vehicular tracking systems. Core Purpose and Architecture icd-gps-153 protocol
Delivers accurate time information, often synchronized with a 1PPS signal, to ensure the external system is synchronized with UTC (Coordinated Universal Time). C. Buffer Box (Message 253) Frequency: 1/6 Hz (once every 6 seconds) military systems require low-latency