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D Logs Summary
218 MiLLennium GPSCard SW Version 4.503/4.52 Command Descriptions Manual Rev 2
SVDA/B SV Position in ECEF XYZ Coordinates with Corrections
When combined with a RGEA/B/D log, this data set contains all of the decoded satellite information necessary to
compute the solution: satellite coordinates (ECEF WGS
84), satellite clock correction, ionospheric corrections (see
the IONOMODEL command on Page 105), tropospheric corrections (Hopfield model), decoded differential
correction used and range weight standard deviation. The corrections are to be added to the pseudoranges. Only
those satellites that are healthy are reported here. Also see Figure D-2, Page 187.
SVDA
Structure:
Example:
$SVDA,766,143860.00,-4.062,7,
20,-15044774.225,-9666598.520,19499537.398,6676.013,-1.657,-2.662,16.975,0.674
5,-10683387.874,-21566845.644,11221810.349,18322.228,-1.747,-2.819,-8.864,0.790,
6,-20659074.698,-28381.667,16897664619,57962.693,-2.543,4.401,-37.490,1.203,
16,142876.148,-26411452.927,2795075.561,-22644.136,-2.733,-4.904,7.701,1.259,
24,-852160.876,-16138149.057,21257323.813,229594.682,-1.545,-2.451,32.178,0.420,
25,-12349609.643,11102877.199,20644151.935,-4313.339,-3.584,-8.579,
-42.813,1.370,
..,
4,14209626.440,-9259502.647,20544348.215,12811.399,-2.675,-4.741,-10.778,1.239
*23[CR][LF]
$SVDA
week seconds
rec clk err # obs
prn x y z clk corr ion corr trop corr diff corr rng std
:
prn x y z clk corr ion corr trop corr diff corr rng std
*xx [CR][LF]
Field # Field type Data Description Example
1 $SVDA Log header $SVDA
2 week GPS week number 766
3 seconds GPS seconds into the week (receiver time, not corrected for clock
error, CLOCKADJUST enabled)
143860.00
4 rec clk err Solved receiver clock error (metres) -4.062
5 # obs Number of satellite observations to follow 7
6 prn Satellite PRN number (1-32) 20
7 x Satellite x coordinate (metres) -15044774.225
8 y Satellite y coordinate (metres) -9666598.520
9 z Satellite z coordinate (metres) 19499537.398
10 clk corr Satellite clock correction (metres) 6676.013
11 ion corr Ionospheric correction (metres) -1.657
12 trop corr Tropospheric correction (metres) -2.662
13 diff corr Decoded differential correction used (metres) 16.975
14 rng std Range weight standard deviation (metres) 0.674
...
...
...
...
...
...
Next PRN number, x, y, z, clk corr, ion corr, trop corr, diff corr, mg std
...
Last PRN number, x, y, z, clk corr, ion corr, trop corr, diff corr, mg std
variable *xx Checksum *23
variable [CR][LF] Sentence terminator [CR][LF]