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Carrier phase delay altimetry with GPS‐reflection/occultation interferometry from low Earth orbiters
Author(s) -
Cardellach E.,
Ao C. O.,
de la Torre Juárez M.,
Hajj G. A.
Publication year - 2004
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 - 10.1029/2004gl019775
Subject(s) - altimeter , global positioning system , geodesy , remote sensing , interferometry , geology , occultation , reflection (computer programming) , gravimetry , phase (matter) , radio occultation , sensitivity (control systems) , geophysics , ionosphere , optics , physics , astronomy , computer science , telecommunications , engineering , quantum mechanics , electronic engineering , programming language
GPS signals reflected off the surface of the Earth can be detected by receivers aboard occulting Low Earth Orbiters (LEOs). In this work, carrier phase interferometry between the reflected and direct occultation signals is performed to infer its relative delay at centimetric error. Our analysis shows that submeter sensitivity on the surface heights can formally be reached with this technique. The potential applications to polar ice altimetry are discussed.