Giodis processing Change?

James Suttles

Active Member
I reduce the base files here at the office daily, just to be sure that nothing has changed with the location. I noticed on February 3rd, Giodis reduced the file with a fairly significant difference in the easting. Basically 0.16' while the northing seems to be relatively close to what has been processed in the previous days. I then compared the Justin and OPUS reductions and they do not share in the same difference as Giodis.

I continued to process the files, to see if it was a bad space weather day, or if there was some noisy data, etc. The result is Giodis is consistent in its reduction of where it feels the base antenna is located.

So, should I just process JUSTIN and OPUS for a check from now on? Is there something that Giodis is doing that the others are not?

Physical conditions, are we had a significant amount of straight line wind around the first of February, and I thought maybe the antenna moved, or the mast attached to the antenna may have slightly bent, but based on OPUS and JUSTIN, I do not believe that to be the issue.

See attached spreadsheet for difference.

Thanks
 

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  • Differences OPUS - JUSTIN - GIODIS.pdf
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