GNSS Solutions Ephemeris Data

Could the issue be with France?????

Obviously it could be but I can't get any info from the US site either.
I have looked on the internet to try and find how to set up other sources but can't find any info that looks to relate to setting a source up in processing software.

Stephen

Have you tried to manually down the IGS/NGS Precise Ephemeris, path the SW to this local folder/Desktop on your PC? It could be the www internet link/path inside the SW is incorrect, or the ftp link has changed.

-BbB, B-)

Can you let me know of a url I can use to do that please?

Otherwise I am reliant on a GNSS Solutions user advising me on the settings they use.

Cheers

Stephen

Default is "Precise SP3"

igs*****.SP3 is the Precise Orbit.

If igs is not available it looks for the igr or Rapid Orbit.

If igr is not available it looks for igu or Ultra-Rapid orbit.

The ephemeris are applicable worldwide so your source can be almost anywhere.

Since I still sometimes use Ashtech Solutions I then have to manually look for orbit data.

I first look at IGS DataProjects.

http://igscb.jpl.nasa.gov/components/prods_cb.html

I can get Ultra-Rapid, Rapid or Precise which is found by opening a Week Folder (i.e. 1753 etc.). 1753 is the GPS week number, followed by 0-7, 0 is Sunday, 6 is Saturday, 7 is the whole week.

Ashtech Solutions does not like the changes made a fews ago to the igr or igs .SP3 files and refuses to use them. That means I grab igu*****_18.sp3. The ultra rapid 18 file contains the rapid for the first 18 hours and predicted for the last 6. Ultra Rapid orbits are available 4 times a day for zero, 06, 12 and 18. The Rapid is available about noon UTC the next day. The Precise about 2 weeks later.

If I am getting data from NGS the orbits are available in the daily CORS RINEX ftp folders.

ftp://www.ngs.noaa.gov/cors/rinex/

This is by Year and GPS day number. Look for igr, igs or igu in the middle of the list.

A GPS calendar should include GPS day and GPS week numbers.

Paul in PA

Default is "Precise SP3"

Thanks Paul I will try that now.
Stephen

Default is "Precise SP3"

Paul in PA's information lead me to a page that had the set up details for downloading the data. I immediately noticed that the default settings in GNSS Solutions for both the US and French emphemeris sites has a http// url instead of a ftp url.

I just changed the url to ftp: and the US site works now, so I guess the French will to when I check it out.

Thanks to all responders.

Stephen