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Bernese GPS Software Version 5.0 - Bernese GNSS Software

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13. Differential Code Biases<br />

================================================================================<br />

PART 6: VERIFICATION OF RECEIVER TRACKING TECHNOLOGY<br />

================================================================================<br />

STATION NAME MULTIPLIER RMS ERROR SUGGESTED RECEIVER TYPE GIVEN RECEIVER NAME/TYPE MATCH<br />

--------------------------------------------------------------------------------------------------------<br />

BRUS 13101M004 -G -0.227 0.049 P1/P2 4.674 25.279 ASHTECH Z-XII3T P1/P2 OK<br />

FFMJ 14279M001 -G -0.113 0.057 P1/P2 1.985 19.606 JPS LEGACY P1/P2 OK<br />

MATE 12734M008 -G 0.868 0.055 C1/X2 2.405 15.757 TRIMBLE 4000SSI C1/X2 OK<br />

ONSA 10402M004 -G -0.107 0.045 P1/P2 2.349 24.393 ASHTECH Z-XII3 P1/P2 OK<br />

PTBB 14234M001 -G -0.126 0.054 P1/P2 2.339 20.903 ASHTECH Z-XII3T P1/P2 OK<br />

VILL 13406M001 -G -0.067 0.047 P1/P2 1.401 22.461 ASHTECH Z-XII3 P1/P2 OK<br />

ZIMJ 14001M006 -G 0.057 0.051 P1/P2 1.115 18.346 JPS LEGACY P1/P2 OK<br />

ZIMM 14001M004 -G 1.134 0.049 C1/X2 2.742 23.230 TRIMBLE 4000SSI C1/X2 OK<br />

Figure 13.5: Verification of the receiver tracking technology: excerpt of a PPP BPE processing<br />

summary file (PPP031390.PRC).<br />

Figures 13.6 and 13.7 illustrate how DCB parameters are to be set up in program <strong>GPS</strong>EST.<br />

You have to mark the option “Differential code biases” in panel “<strong>GPS</strong>EST 5.2: Setup of Parameters<br />

and Pre-Elimination 2” to get panel “<strong>GPS</strong>EST 6.12: Differential Code Biases”, where you can select<br />

one particular DCB parameter type (P1–P2, P1–C1, or P1–C1 MULTIPLIER).<br />

13.3.4 Remark on GLONASS Code Biases<br />

In case of GLONASS, frequency-dependent code biases are present, namely specific to each<br />

satellite and each individual receiver. The <strong>Version</strong> <strong>5.0</strong> of the <strong>Bernese</strong> <strong>GPS</strong> <strong>Software</strong> is<br />

not yet able to tackle such frequency-dependent biases. Anyway, the code bias corrections<br />

discussed in this chapter may be considered as adequate first-order corrections.<br />

Page 286 AIUB

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