RaceCapture GPS: Difference between revisions

Revision as of 15:58, 12 April 2016

GPS is a complex and sensitive system that can be affected by many different factors. Number of satellites, nearby radios, weather, terrain and obstructions all affect GPS data. To get the best GPS signal and quality, use these tips.

Use 10Hz for best balance of performance / accuracy

If you are at a track that has lots of elevation changes, obstructions (bridges, hills, buildings, etc), keep the update rate at 10Hz.

25 and 50Hz can be used when you have clear horizon to horizon view all around, with minimal obstructions and terrain- such as flat plains or desert terrain.

Clear view of sky

Make sure the GPS antenna is mounted in a location with a full view of the sky. The best place is on the roof of your car, or under the front or rear window.

Check torque on GPS antenna connector

Ensure the GPS antenna is properly torqued to 3-5 inch/lbs

Check Satellites in view and DOP

If you're suspecting marginal GPS conditions, ensure you log the Satellites (satellites in view) and DOP (Dilution of Precision) channels and see if that correlates with any GPS errors.

GPS interfence

Electrical or radio systems can cause interference if the radio's transmitting frequency (or it's harmonic frequency) is close to GPS bands (~1300MHz). If you notice GPS accuracy problems or speed glitches coinciding during transmission of in-car radios, it's recommended you switch your radios to a channel further away from the GPS band.

You can also move the GPS antenna further away from the transmitting antenna.

Use latest RaceCapture/Pro firmware

We continually add improvements to RaceCapture/Pro firmware to improve all functionality, make sure you are on the latest version. Download firmware here

@@ Line 14: / Line 14: @@
 If you're suspecting marginal GPS conditions, ensure you log the Satellites (satellites in view) and DOP (Dilution of Precision) channels and see if that correlates with any GPS errors.
-===Away from transmitting devices===
+===GPS interfence===
-GPS antennas can be affected by other transmitting devices. ideally, place the GPS antenna as far away from them as possible. If you notice GPS accuracy issues while an in-car radio is transmitting, check the frequency that the radio is broadcasting on. If necessary, change to a different broadcasting frequency / channel.
+Electrical or radio systems can cause interference if the radio's transmitting frequency (or it's harmonic frequency) is close to GPS bands (~1300MHz). If you notice GPS accuracy problems or speed glitches coinciding during transmission of in-car radios, it's recommended you switch your radios to a channel further away from the GPS band.
+* You can also move the GPS antenna further away from the transmitting antenna.
 ===Use latest RaceCapture/Pro firmware===
 We continually add improvements to RaceCapture/Pro firmware to improve all functionality, make sure you are on the latest version. [[RaceCapturePro_Downloads|Download firmware here]]