title: PAU/RAD: Design and Preliminary Calibration Results of a New L-Band Pseudo-Correlation Radiometer Concept.
abstract: The Passive Advanced Unit (PAU) for ocean monitoring is a new type of instrument that combines in a single receiver and without time multiplexing, a polarimetric pseudo-correlation microwave radiometer at L-band (PAU-RAD) and a GPS reflectometer (PAU-GNSS/R). These instruments in conjunction with an infra-red radiometer (PAU-IR) will respectively provide the sea surface temperature and the sea state information needed to accurately retrieve the sea surface salinity from the radiometric measurements. PAU will consist of an array of 4x4 receivers performing digital beamforming and polarization synthesis both for PAU-RAD and PAU-GNSS/R. A concept demonstrator of the PAU instrument with only one receiver has been implemented (PAU-One Receiver or PAU-OR). PAU-OR has been used to test and tune the calibration algorithms that will be applied to PAU. This work describes in detail PAU-OR's radiometer calibration algorithms and their performance.
authors.affiliation: Remote Sensing Lab, Dept. Teoria del Senyal i Comunicació, Campus Nord D3, Universitat Politècnica de Catalunya, 08034 Barcelona, Spain. xavier.bosch@tsc.upc.edu.
authors.forename: Xavier
authors.initials: X
authors.lastname: Bosch-Lluis
authors.affiliation: Remote Sensing Lab, Dept. Teoria del Senyal i Comunicació, Campus Nord D3, Universitat Politècnica de Catalunya, 08034 Barcelona, Spain.
authors.forename: Adriano
authors.initials: A
authors.lastname: Camps
authors.affiliation: Remote Sensing Lab, Dept. Teoria del Senyal i Comunicació, Campus Nord D3, Universitat Politècnica de Catalunya, 08034 Barcelona, Spain.
authors.forename: Isaac
authors.initials: I
authors.lastname: Ramos-Perez
authors.affiliation: Remote Sensing Lab, Dept. Teoria del Senyal i Comunicació, Campus Nord D3, Universitat Politècnica de Catalunya, 08034 Barcelona, Spain.
authors.forename: Juan Fernando
authors.initials: JF
authors.lastname: Marchan-Hernandez
authors.affiliation: Remote Sensing Lab, Dept. Teoria del Senyal i Comunicació, Campus Nord D3, Universitat Politècnica de Catalunya, 08034 Barcelona, Spain.
authors.forename: Nereida
authors.initials: N
authors.lastname: Rodriguez-Alvarez
authors.affiliation: Remote Sensing Lab, Dept. Teoria del Senyal i Comunicació, Campus Nord D3, Universitat Politècnica de Catalunya, 08034 Barcelona, Spain.
authors.forename: Enric
authors.initials: E
authors.lastname: Valencia
keywords: calibration; field-programmable gate array (FPGA).; pseudo-correlation; radiometer; reflectometer