GPS Sample Data

Drone flight 4/14/17

Several short drone flights with a pair of CSG M8T receivers.  The data included Galileo measurements as well as GPS, GLONASS, and SBAS and has over twenty satellites available for ambiguity resolution.  The short section of float that occurs at the end of each flight is caused by the drone bouncing on its side or back upon landing and blocking the antenna.  The position data plotted below is for the z axis only and was done with fix-and-hold enabled although most of the data is of high enough quality to use continuous ambiguity resolution


Lake sailing 10/30/16

Two Laser sailboats each with an M8N receiver mounted on the deck in front of the mast.  One receiver ran at 5 Hz and used a u-blox antenna.  The other receiver ran at 1 Hz and used the inexpensive patch antenna that came with the receiver.  The base station for both solutions was a CORS reference site 18 km away.  Both solutions have close to 100% fix rate.  The boats heeling did not seem to affect the solution.



3DR radio test 9/6/16

Test of real-time processing using two 3DR radios for data link.  Base and receiver are both M8N receivers with u-blox antennas.  The base station is mounted on a tripod and the rover on top of a car.  The distance between car and base occasionally exceeded the radio range which can be seen as spikes in the "age of differential"  plot.

This data includes tag files and can be used as inputs for RTKNAVI for a simulation of a real-time run.

output output2

Niwot car 7/28/16

Separate M8N and M8T rovers mounted on top of car driving through a residential neighborhood.  Separate M8N and M8T base stations. M8N receivers using u-blox antennas, M8T units are both Emlid Reach. Both M8N and M8T pairs have nearly 100% fix.


Union Reservoir car 7/05/16

This data includes an M8N receiver and Emlid Reach M8T receiver mounted on top of a car and a fixed Emlid Reach base station. This is good data for playing around with moving-base solutions since it includes two moving receivers and a fixed receiver to help verify the moving-base solution. However,it does have a receiver warm-up glitch with a simultaneous cycle-slip on all satellites at the beginning of the moving M8T receiver which can make it a little more challenging to work with. I've also included the moving base configuration file I described in one of my posts.