Appendix A: Glossary of Terms¶
Table 9: Glossary of Terms
| Term | Definition |
|---|---|
| NTRIP | Networked Transport of RTCM via Internet Protocol — a protocol for streaming GNSS correction data over the internet. |
| RTCM | Radio Technical Commission for Maritime Services — the standard message format for GNSS correction data. |
| RTK | Real-Time Kinematic — a GNSS positioning technique using correction data to achieve centimeter-level accuracy. |
| NMEA | National Marine Electronics Association — a standard text-based protocol for GNSS receiver output. |
| GGA | An NMEA sentence type carrying fix data (time, position, fix quality). |
| RMC | An NMEA sentence type carrying minimum recommended navigation data (position, velocity, time). |
| HPR | An NMEA sentence type expected to be output as GNHPR carrying GNSS-derived orientation data from a dual antenna configuration. |
| MSM7 | Multiple Signal Message type 7 — a high-resolution RTCM3 observation message format. |
| FBL | Firmware Bootloader — the mode the H1P enters to apply a firmware upgrade. |
| DFU | Device Firmware Update — a boot mode used for low-level firmware recovery. |
| NCM | Network Control Model — a USB class that presents a network adapter without a dedicated driver. |
| IMU | Inertial Measurement Unit — combined accelerometer and gyroscope sensor. |
| LNA | Low-Noise Amplifier — used in active GNSS antennas to boost signal before the receiver. |
| GNSS | Global Navigation Satellite System — the umbrella term for GPS, GLONASS, Galileo, BeiDou, etc. |