Subject: [IGSMAIL-5915]: Re: need help about sp3 download
From: "Jim.Ray" <[email-masked]>
To: tamer elgharbawi <[email-masked]>
Cc: [email-masked]
Date: Wed, 11 Mar 2009 08:57:04 -0400

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IGS Electronic Mail      11 Mar 05:57:31 PDT 2009      Message Number 5915
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Author: Jim Ray

A simple web search will find many algorithms and routines
to interpolate the IGS 15-minute SP3 files to arbitrary
sampling intervals.  It is straightforward to use most of
these approaches to derive the associated satellite velocities.
References to some published methods are also cited on the
front page of the ACC website at acc.igs.org.

Future inquiries should be directed to the IGS Central Bureau
(igscb @ igscb.jpl.nasa.gov) for general matters or to the ACC
(igs.acc @ noaa.gov) for product-specific issues.

tamer elgharbawi wrote:
> ******************************************************************************
> IGS Electronic Mail      11 Mar 03:38:37 PDT 2009      Message Number 5914
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> 
> Author: Tamer El-Gharbawi  
> Dear IGS Colleagues:
> i need to download the sp3 files that include the velocity vectors of the satellites
> but all i can find in the download area is
> sp3 files type c and  p flag
> i need to know whether the velocity vectors for the GPS satellites is available on your network or not, and where can i get it if it's not available
> on your network?
> Sincerely, Tamer El-Gharbawi