Title :
Effects of Faraday rotation on microwave remote sensing from space at L-band
Author :
Le Vine, D.M. ; Kao, M.
Author_Institution :
Lab. for Hydrospheric Processes, NASA Goddard Space Flight Center, Greenbelt, MD, USA
Abstract :
The effect of Faraday rotation on the remote sensing of soil moisture from space is investigated using the International Reference Ionosphere (IRI) to obtain electron density profiles and the International Geomagnetic Reference Field (IGRF) to model the magnetic field. With a judicious choice of satellite orbit (6 am, sunsynchronous) the errors caused by ignoring Faraday rotation are less than 1 K at incidence angles less than 40 degrees
Keywords :
Faraday effect; UHF measurement; UHF radio propagation; geophysical techniques; hydrological techniques; ionospheric electromagnetic wave propagation; moisture measurement; polarimetry; radiometry; remote sensing; soil; Faraday rotation; IGRF; IRI; International Geomagnetic Reference Field; International Reference Ionosphere; L-band; UHF; electron density profile; geomagnetic field; geophysical measurement technique; hydrology; ionosphere; land surface; microwave radiometry; microwave remote sensing; polarimetry; radiowave propagation; satellite method; soil moisture; terrain mapping; water content; Brightness temperature; Electrons; Extraterrestrial measurements; Frequency; Ionosphere; L-band; Polarization; Remote sensing; Rough surfaces; Space technology;
Conference_Titel :
Geoscience and Remote Sensing, 1997. IGARSS '97. Remote Sensing - A Scientific Vision for Sustainable Development., 1997 IEEE International
Print_ISBN :
0-7803-3836-7
DOI :
10.1109/IGARSS.1997.615890
