2018-07-04 00:31:08 UTC
The Acutime GG is pretty much the worst performing device in my collection... it is L1 pseudorange only, it is a small sealed unit with a built-in patch antenna, and it was sitting 8" above the ground in a horrible multi-path infested position.
The first way the data was decimated was to reduce the 16 hours of 1 second interval data to 1/5/10/30 second intervals. The lat/lon/alt error ellipses were:
1 second: 188/175/488 mm
5 second: 259/241/673 mm
10 second: 297/277/773 mm
30 second: 371/346/966 mm
The second way it was decimated was to take the first 2/4/8/16 hours of 1 second intervals:
2 hours: 628/667/1756 mm
4 hours: 439/415/1022 mm
8 hours: 288/270/738 mm
16 hours: 192/178/496 mm
The results with Ublox LEA4/5/6/8T (carrier phase and pseudorange) receivers with 16 hours of 1 second intervals were around 125/130/250 mm. With 2 hours of data and/or 10 second intervals the errors were around half of what the Acutime GG produced.
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