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On-board phase and modulus calibration of large aperture synthesis radiometers: study applied to miras.
Torres Torres, Francisco; Camps Carmona, Adriano José; Bará Temes, Francisco Javier; Corbella Sanahuja, Ignasi; Ferrero Pintor, Roberto
Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció
On-board calibration of bidimensional aperture synthesis radiometers with a large number of antennas by the standard correlated noise injection method is technologically very critical because of the stringent requirements on mass, volume, and phase equalization of the noise distribution network. A novel approach, which makes use of a set of uncorrelated noise sources uniformly distributed in the array, is proposed. Each noise source drives correlated noise only to a small set of adjacent antennas. These sets of antennas are overlapped in order to maintain phase and modulus track along the array. This approach reduces drastically mass and volume of the noise distribution network. Moreover, its phase matching requirement is strongly relaxed because it is only necessary within small sets of adjacent antennas. Power stability of the uncorrelated noise sources is also not a stringent requirement. This procedure allows independent phase and modulus calibration by making use of a reduced number of redundant correlations.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció
Radar Equipment and supplies
Remote sensing applications
Earth sciences
Microwave measurements
Boundary layer (Meteorology)
calibration
geophysical techniques
microwave imaging
radiometry
remote sensing
MIRAS
bidimensional aperture synthesis radiometer
geophysical measurement technique
land surface
large aperture synthesis radiometry
microwave radiometry
modulus calibration
onboard phase calibration
phase matching
satellite remote sensing
terrain mapping
Radar
Sensors remots
Ciències de la terra
Microones -- Mesurament
Capa límit (Meteorologia)
Article
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
         

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