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Sunnyvale, CA | We have discontinued the use of a static filter in any of our current AgGPS receivers. However, some GPS vendors still have a static filter for when a receiver is stationary to make it look better than it really is during static tests, but that is a trap that we avoid, since some of our customers move very slowly and they don't want their GPS receiver to always read the same position. We have implemented our OnPath filter to notice the changes in the constellation and find it works quite well. you can turn that filter on and off, and change its time constant in the setup menu.
it makse no difference where the WAAS reference receivers are located because WAAS uses a wide area correction which smooths the iono and ephemeris over the CONUS. And it is this very nature of smoothing over a very large area that allows the beacon to be better when you are close to a beacon. During the peak of the sunspots about 4-5 years ago, the beacon users had a decided advantage if they are within 60 miles. now with the low sunspot numbers, the beacons have a better range for good corrections. with a beacon 20 miles away, you should see terrific performance now and in the future - even with the expected high sunspot count 5 years from now. | |
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Like a homesick angel
