[teqc] Question

Sam Storm van Leeuwen samsvl at nlr.nl
Wed Mar 8 01:13:34 MST 2006

Hi Daniele,

The data looks like single frequency data of a low cost receiver, right?
If this is the case, you can ,with limited accuracy, interpolate the
range data (pseudorange, integrated carrier) using the following steps:
1. calculate the 'stand alone' positions for each epoch. As a by-product
you'll get the receiver clock error with reasonable accuracy.
2. For each epoch: correct epoch time by applying the clock error, and
correct pseudorange and integrated carrier again by applying clock error
3. Most probably the epoch time will not be a full second.
Now you can interpolate the ranges to the full second.
and this process is of limited accuracy.

Maybe better than nothing!



At 20:43 7-3-2006 +0000, you wrote:
>Good afternoon,
>I would like to know if it is possible to correct the
>GPS observables (of a RINEX file) of the receiver
>For example:
>  05  5 25  0  0 15.2230000  0  8G16G 3G22G14 ...
>   31687139.09146  24649869.97746  89193652.7594
>    4021695.90246   3073693.39846  89490059.7434
>   20737659.47748  16132538.86747  87108723.2594
>The observables are degraded by receiver error that is
>0.223. Is it possible to correct the observables and
>consequently change 15.2230000 to 15.000???
>Thanks, Daniele Barroca.
>Sao Paulo State, Brazil.
>Yahoo! Acesso Grátis - Internet rápida e grátis. Instale o discador agora!
>teqc mailing list
>teqc at ls.unavco.org

Sam Storm van Leeuwen                       e-mail: samsvl at nlr.nl
National Aerospace Laboratory NLR       web: http://www.nlr.nl
POBox 90502, 1006BM Amsterdam       phone: +31 20 511 3562
Netherlands                                          fax: +31 20 511 3210

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