SOPAC GPS Services
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Real-Time Streaming Position Messages

Following Applet shows the streaming real-time position messages collected from three GPS networks discussed in this page.

Initial parameters are set according to SOPAC NaradaBrokering server installation. To see the real-time data select one of the three ASCII topics and click “Start Subscriber” button. To subscribe another topic terminate the current subscription (if alive) by clicking “Stop Subscriber” first.

 

The messages shown in this Applet are decoded from binary RYO messages which are collected from the RTD server operated by SOPAC.

The ASCII position message format is explained in the following sample reading:

  Site Information
Date-Time Site No Site Count Site Name
2005-06-30/02:53:46PM-PDT 10 12 PIN1

XYZT Position ( (ITRF X,Y and Z position values and tropospheric zenith delay)
X Y Z T
-2369510.5864573503 -4761206.955201118 3511396.2089700387 2.0160536713070343

Lat Lon Height
33.61215610356556 -116.45815929197931 1256.0985413365834

Position Quality
L1/L2 Phase

Optional Blocks Present in this message
XYZ Satellite

Optional XYZ variance/covariance block
Scale X variance Y variance Z variance
0.07080725787539775 0.012033158002938162 0.057956332905291355 0.03346255082946604
YX covariance YZ covariance ZX covariance  
0.02303386860670539 -0.038576748472372344 -0.014979541645732198  

Optional Satellite Block
Satellite Count GDOP
9 2.530494863140125

Satellite No PRN PRN Flags Elevation Azimuth
1 1 7 34 67
2 11 7 22 -141
3 13 7 11 -74
4 14 7 3 87
5 16 7 41 128
6 20 7 68 -47
7 23 7 39 -57
8 24 7 28 -68
9 25 7 38 44

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