What we found at the Onsala Space Observatory, was that satellites in low declination added some error due to atmospheric tindering. What was also discovered was that conical radomes on the Leica antennas also was not optimum. Therefore, spheric radomes was substituded and the antennas was selected to minimize coverage for low declination satellites. Cheers Ulf Kylenfall SM6GXV Senior Research Engineer (Retired)ex Onsala Space Observatory
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