Premium
Improving GPS surveying with modeled ionospheric corrections
Author(s) -
Rocken Christian,
Johnson James M.,
Braun John J.,
Kawawa Hiroshi,
Hatanaka Yuki,
Imakiire Tetsuro
Publication year - 2000
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 - 10.1029/2000gl012049
Subject(s) - global positioning system , ionosphere , geodesy , satellite , remote sensing , geology , grid , epoch (astronomy) , baseline (sea) , computer science , geophysics , telecommunications , physics , stars , oceanography , astronomy , computer vision
We model the ionospheric delay of Global Positioning System (GPS) signals with high precision and use it to correct single frequency (L1) GPS baseline estimations. We find that baselines up to 30 km in length are more precisely determined using corrected L1 data than using dual frequency data. The high resolution ionospheric modeling technique (called HiRIM in this paper) is demonstrated with 195 days of data from a 25‐site GPS network at ∼1 km spacing in central Japan. The network was designed for high vertical precision tectonic studies. We compute ionospheric corrections using data from a surrounding grid of nine GPS sites spaced ∼50 km. Based on the observations from the surrounding grid, epoch and satellite specific ionospheric delays are interpolated to correct L1 observations from the internal sites. HiRIM has potential post‐processing and real‐time applications in navigation, surveying, and GPS meteorology.