Because ICD-GPS-153 is classified as a controlled military interface document, it is not openly hosted for public download on the primary GPS.gov Interface Specification Directory . Engineers, defense contractors, and system integrators seeking the full parameters must request access explicitly:
The primary function of the ICD-GPS-153 protocol is to establish a secure and deterministic language between military host platforms and embedded GPS modules.
If you are an engineer or developer trying to implement a GPS interface, you should look to (formerly ICD-GPS-200). This is the standard that defines how 99% of the world's GPS receivers decode the L1 C/A signal. icd-gps-153 protocol
Understanding the ICD-GPS-153 Protocol: Military GPS Standard Serial Interface
Used to provide GPS data to SINCGARS radio systems. Because ICD-GPS-153 is classified as a controlled military
Primarily used by SAASM GPS receivers to interface with external systems.
+-----------------------------------+ +------------------------------------+ | Military GPS Receiver (UE) | Serial | Host System | | - GB-GRAM / DAGR | Interface | - SINCGARS Tactical Radio | | - SAASM / M-Code Security Core | ----------> | - Weapon / Survey System | | - Generates Time & Status Data | (153 Protocol)| - Command & Control Network | +-----------------------------------+ +------------------------------------+ Physical and Data Link Layer Specifications This is the standard that defines how 99%
, making it more efficient for high-speed data transmission in ruggedized or tactical environments. Device Compatibility
Interface Control Documents (ICDs) are the formal means of establishing, defining, and controlling interfaces for the Global Positioning System (GPS) program. Among the many ICDs that govern GPS, the ICD-GPS-153 standard is a critical interface specification for military GPS systems. This article provides a detailed exploration of the ICD-GPS-153 protocol, its core messages, its relationship to SAASM and SINCGARS, its hardware characteristics, and its real-world applications.
-based units to exchange timing, position, and status information. Safran - Navigation & Timing 2. Key Message Types