Question

Hi:

Would you please describe to me what is the term wide lane biase means in RDD file. Is it the residuals of wide lane combination in code.

Also, I'm working with version 1.20 and i'm trying to see the DD residual in carrier phase on L1 and L2 to isolate Multipath. So, i'm interest to see the residuals in L1 and L2 phase when applying both wide lane and iono-free linear combination.

The last question is a question that asked before which is i'm doin a DD over a very short baseline 65 m and i have the problem and i have trend linear and quadratic sometimes with magnitude of 10 cm in L1 DD residuals and i'm sure i added my stations positions very accurate in the DDBASE. So, i don't know why is this trend, could it be due to the different of the rate of change of the Doppler in the satellites that involved in the DD process.

Thanks for your time and i hope to get your reply soon.

-- AhmedElghazouly - 23 Nov 2007

Answer

ALERT! If you answer a question - or have a question you asked answered by someone - please remember to edit the page and set the status to answered. The status is in a drop-down list below the edit box.

The wide lane bias is the difference of the narrow lane range and the wide lane phase, or the Welborne-Wubbena combination; this is a standard, simple linear combination of the dual frequency p-range and phase that eliminates all but a combination of the phase biases. Any trend in the raw DDs must be due either to a position error or to multipath. I can't tell anymore without seeing the data....

-- BrianTolman - 26 Nov 2007

Thank you so much....

-- AhmedElghazouly - 27 Nov 2007 No such template def TMPL:DEF{PROMPT:supportquery}

Topic revision: r4 - 27 Nov 2007, RickMach
 

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