iGage iG5, Руководство пользователя

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53 iG5 User Manual
If you are in Michigan:
There are a lot of CORS stations within 250 KM of
everywhere. OPUS-RS is likely to always succeed, even if a
few of the stations are offline, are missing data or are very
noisy and must be discarded.
If you are in the middle of Utah there are very few CORS sites
available on a good day:
On a bad day, if a few stations are offline or have not yet
archived data then your OPUS-RS solution will fail because
there are not enough stations close to your occupation.