Premium
Interference from terrestrial sources and its impact on the GRAS GPS radio occultation receiver
Author(s) -
Isoz Oscar,
Buehler Stefan A.,
Kinch Kjartan,
Bonnedal Magnus,
Akos Dennis M.
Publication year - 2014
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1002/2013rs005243
Subject(s) - global positioning system , gnss applications , interference (communication) , remote sensing , radio occultation , electromagnetic interference , noise (video) , satellite , computer science , carrier to noise ratio , environmental science , telecommunications , physics , geography , signal to noise ratio (imaging) , astronomy , channel (broadcasting) , artificial intelligence , image (mathematics)
It is well known that terrestrial GPS/Global Navigation Satellite Systems (GNSS) receivers are vulnerable and have suffered from intentional and unintentional interference sources. Unfortunately, space‐based GPS/GNSS receivers are not exempt from radio frequency interference originating from the Earth. This paper explores data recorded by the GNSS Receiver for Atmospheric Sounding (GRAS) instrument onboard MetOp‐A in September 2007, which is assumed to be representative of the typical environment for GPS/GNSS instrumentation in LEO orbit. Within these data it is possible to detect both pulsed interference and variations in the background noise. One plausible source of the pulsed interference is identified. We also show that neither the pulsed interference nor the variations in the background noise degrades the performance of the higher level products from GRAS.