gps-guides
Locosys GT-31
Details about the GT-31 can still be found on the Locosys website.
This was a significant improvement to the GT-11, thanks to use of a newer GPS chipset from SiRF:
- Faster satellite acquisition; time to first fix (TTFF).
- Increased positional accuracy.
- Less prone to spikes in Doppler speed data.
- Longer battery life.
SDOP became available for the first time, allowing the Doppler speed accuracy to be estimated with 99% certainty.
The GT-31 was superseded by the GW-52 in 2015, when Locosys stopped producing the GT-31.
Tips
- Enable DGPS (SBAS) for improved positional accuracy.
Specifications
| Item | Details |
|---|---|
| Logging | 1 Hz |
| Memory | ~5h 30m (internal) but much more with SD card |
| Battery | ~40 hours |
| Charging | Mini USB cable |
| Download | SD card or mini USB cable + NAVILINK |
| Best Formats | SiRF binary (SBN) or SiRF binary, packed (SBP) |
| Other Formats | NMEA |
| GPS chipset | SiRFstar III |
| Additional Logging | Sats, HDOP, SDOP |
| Approved for GP3S | Yes |
| Approved for GPSTC | Yes |