Calibration, performance, and imaging tests of a fully digital synthetic aperture interferometer radiometer
Visualitza/Obre
Calibration, Performance, and Imaging Tests of.pdf (2,738Mb) (Accés restringit)
Sol·licita una còpia a l'autor
Què és aquest botó?
Aquest botó permet demanar una còpia d'un document restringit a l'autor. Es mostra quan:
- Disposem del correu electrònic de l'autor
- El document té una mida inferior a 20 Mb
- Es tracta d'un document d'accés restringit per decisió de l'autor o d'un document d'accés restringit per política de l'editorial
10.1109/JSTARS.2012.2193118
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/17449
Tipus de documentArticle
Data publicació2012-06-28
Condicions d'accésAccés restringit per política de l'editorial
Llevat que s'hi indiqui el contrari, els
continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
:
Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
This work presents the calibration, characterization,
and imaging tests of the Passive Advanced Unit-Synthetic Aperture
instrument (PAU-SA). PAU-SA is a fully digital -shaped
two-dimensional synthetic aperture interferometric radiometer
operating at the Global Positioning System (GPS) L1 band
( GHz), conceived as a test-bed for potential
technological improvements in future instruments. Calibration
of instrumental offsets is performed by looking to a microwave
absorber and the “cold” sky. Since the instrument operates in
the GPS L1 band, GPS satellites are imaged therefore, a new
way to compute the Flat Target Response (FTR) has been devised.
Internal phase/amplitude calibration is performed using
a new technique that consists of injecting pseudo-random noise
signals. Different paths from the input switch to the antennas
are calibrated by means of an external beacon. A near-field to
far-field transformation is applied to compensate for differences
in the propagation paths. Finally, absolute amplitude calibration
is achieved by imaging the GPS satellites constellation when
pointing to the zenith. Evaluation of the images’ quality in terms
of angular resolution, radiometric resolution and precision, show
the goodness of the techniques applied to compensate for instrumental
errors, the imaging capabilities of the instrument, and
demonstrate their applicability in future missions.
CitacióRamos, I. [et al.]. Calibration, performance, and imaging tests of a fully digital synthetic aperture interferometer radiometer. "IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing", 28 Juny 2012, vol. 5, núm. 3, p. 723-734.
ISSN1939-1404
Versió de l'editorhttp://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6197242
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
Calibration, Performance, and Imaging Tests of.pdf | 2,738Mb | Accés restringit |