While the full list includes dozens of subframes, the core messages you must handle are:
ICD-GPS-153 stands for . While that sounds like a mouthful, its purpose is succinct: it defines the interface between the GPS receiver (the hardware decoding the satellite signals) and the host system (the computer, vehicle computer, or software application using that data). icd-gps-153 protocol
For developers, systems integrators, and engineers working in the field of navigation, the is not just a reference document; it is the blueprint for interoperability. This article provides a deep dive into the ICD-GPS-153 standard, exploring its history, technical architecture, message structure, and its enduring relevance in the age of multi-constellation navigation. While the full list includes dozens of subframes,
| Offset | Type | Value Range | Description | |--------|------|-------------|-------------| | 0 | int32 | ±90° (scaled by 1e7) | Latitude (degrees * 10^7) | | 4 | int32 | ±180° (scaled by 1e7) | Longitude (degrees * 10^7) | | 8 | int32 | -1000 to 50000 m | Height above ellipsoid (m) | | 12 | int16 | 0–65535 | Time of week (ms) | | 14 | uint8 | bitmask | Fix quality: 0=no fix, 2=2D, 3=3D | | 15 | uint8 | 0–12 | Number of satellites used | | 16 | float32 | -1.0 to +1.0 | Horizontal dilution of precision (HDOP) | | 20 | uint8 | — | System status (reserved) | | 21 | uint8 | — | Altitude source flag | This article provides a deep dive into the