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While there are dozens of specific messages, these are the core types used in most integrations: Message ID Description
Often referred to as the GPS Standard Serial Interface Protocol (GSSIP) . icd-gps-153 protocol
: It provides a standard messaging format so that different military GPS hardware (like the NavGuard 100 While there are dozens of specific messages, these
At the heart of this ecosystem lies a document and a protocol designated . For engineers, defense contractors, and systems integrators working with the United States Space Force (USSF) and NATO allies, ICD-GPS-153 is not just another specification; it is the definitive blueprint for interfacing with high-precision, secure GPS receivers for weapon systems, aircraft, and naval platforms. The protocol is a standard serial interface used
The protocol is a standard serial interface used primarily by United States military GPS receivers, such as the DAGR (Defense Advanced GPS Receiver) and PLGR (Precision Lightweight GPS Receiver). Unlike the common civilian NMEA-0183 protocol, it is designed to handle encrypted and secure data, including time and frequency synchronization for tactical systems. Core Functionality