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Processing and Solutions

IGS MTKA station

Coordinate Estimate
East component of GPS only (green) and GPS+GLONASS (red) PPP solution for IGS station MTKA. The top and bottom panels show cut-off angle of 17 and 15 degrees, respectively.

The jump of the coordinate around 5:50 UTC is due to co-seismic motion of the Tohoku-oki earthquake on March 11, 2011, while a jump in GPS only solution in the top panel at around 5:15 UTC is noise due to limited number of satellites with the setting of higher elevation cut-off angle.

Such artificial jumps in limited sight condition can be reduced by using multiple satellite system.

Sample data and Setting

Item/Parameters Notes and Setting
Processing PPP processing (GPS + GLONASS)
Purpose Monitor seismic wave and co-seismic deformation with PPP
Stations IGS MTKA station
(Please use the template file by replacing the stations).
Processing time window 2011/03/11 00:00-24:00 UTC
(Please use the template file by cahnging the time-window setting).
Used data GPS+GLONASS phase L3 (IF: Ionosphere free) , 30 sec. processing
Get data Download from IGS CDDIS
Satellite products Veripos APEX real-time satellite products (GPS+GLONASS) are used (any standard products can be used, see products available publicly.
Setting in processing PPP kinematic processing
Constrain A priori coordinate 1,000m, Coordinate change 100m/s, ZTD 1e-5 m/s
Processing cost About 1 minute
Validation Validate solutions at fixed station with setting of the same constrain.