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Cedar Rapids, Iowa | A base station functions by monitoring the amount of signal delay as it comes through the atmosphere. To calculate this, the base station has to be stationary and operating with a fixed latitude/longitude/altitude. When the location of the receiver is known, and the location of the satellites is known, then the atmospheric delay can be directly measured.
The easiest way to come up with that fixed location is to have the receiver operate as a rover for a while and collect data. The idea is that if you collect enough data, you can average it all together and come up with the actual location of the receiver, or at least pretty close.
Base stations that are intended to be portable will do a self survey every time they boot up, usually only for a minute or two. Permanently mounted base stations will often collect data for 1-2 days, in order to get a more accurate absolute position. However, one a permanent base station has that fixed location, it won't change. This gives you long term repeatability in the field. | |
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Can anyone explain RTK base station "self survey" in laymans terms
