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GPS surveying with 1 mm precision using corrections for atmospheric slant path delay
Author(s) -
Alber Chris,
Ware Randolph,
Rocken Christian,
Solheim Fredrick
Publication year - 1997
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/97gl01877
Subject(s) - remote sensing , global positioning system , geodesy , satellite , altimeter , multipath propagation , environmental science , radiometer , geology , synthetic aperture radar , elevation (ballistics) , calibration , atmospheric sounding , radar , meteorology , computer science , physics , telecommunications , computer network , channel (broadcasting) , quantum mechanics , astronomy
Multipath and atmospheric effects can limit GPS surveying precision. We surveyed a 43 km baseline using large diameter choke ring antennas to reduce multipath and pointed radiometer and barometric data to correct for atmospheric slant delay. Based on 11 daily solutions, atmospheric slant delay corrections improved vertical precision to 1.2 mm rms and horizontal precision to sub‐mm. Applications for high precision GPS surveying include deformation monitoring associated with earthquake and volcanic processes, subsidence, isostasy, and sea level measurements; monitoring of atmospheric water vapor for climate and global change research, and to improve the resolution of synthetic aperture radar; calibration of satellite altimeters; and precise satellite orbit determination.