Abstract

High-accuracy GPS observations can be affected by the GPS antenna type and mount. However, these effects can be corrected using anechoic chamber or field measurements. The corrections range from the 1 mm level to the 100 mm level for commonly used geodetic quality antennas and mounts, but the res... Show moreHigh-accuracy GPS observations can be affected by the GPS antenna type and mount. However, these effects can be corrected using anechoic chamber or field measurements. The corrections range from the 1 mm level to the 100 mm level for commonly used geodetic quality antennas and mounts, but the residual errors may be as large as 20 mm. In order to calibrate a variety of geodetic antennas and mounts, we conducted tests on short baselines in the field and in a state-of-the art anechoic antenna chamber. The results are summarized here and are described in detail in the UNAVCO Academic Research Infrastructure (ARI) Receiver and Antenna Test Report. Also examined here are the effects of high and low antenna heights, snow at the site and protective antenna radomes. Show less