New improved algorithm for sky calibration of L-band radiometers JLBARA and ELBARA II

Marin Dimitrov; K. G. Kostov; François Jonard; Khan Jadoon; Mike Schwank; Lutz Weihermüller; Normen Hermes; Jan P. Vanderborght; Harry Vereecken

doi:10.1109/MicroRad.2012.6185259

New improved algorithm for sky calibration of L-band radiometers JLBARA and ELBARA II

Marin Dimitrov, K. G. Kostov, François Jonard, Khan Jadoon, Mike Schwank, Lutz Weihermüller, Normen Hermes, Jan P. Vanderborght, Harry Vereecken

Biological, Environmental Sciences and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Scopus citations

Abstract

We propose a new algorithm for sky calibration of the L-band radiometers JLBARA and ELBARA II, introducing the effective transmissivities of the instruments. The suggested approach was tested using experimental data obtained at the Selhausen test site, Germany. It was shown that for JLBARA the effective transmissivities depend strongly on the air temperature and decrease with increasing air temperature, while for ELBARA II such strong dependence was not observed. It was also shown that the effective transmissivities account for the antenna and feed cable loss effects, and for the variations of the radiometer gain due to air temperature changes. The new calibration algorithm reduces significantly the bias of brightness temperature estimates for both radiometers, especially for JLBARA. © 2012 IEEE.

Original language	English (US)
Title of host publication	2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)
Publisher	Institute of Electrical and Electronics Engineers (IEEE)
ISBN (Print)	9781467314701
DOIs	https://doi.org/10.1109/MicroRad.2012.6185259
State	Published - Mar 2012

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KAUST Repository Item: Exported on 2020-10-01

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10.1109/MicroRad.2012.6185259

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Dimitrov, M., Kostov, K. G., Jonard, F., Jadoon, K., Schwank, M., Weihermüller, L., Hermes, N., Vanderborght, J. P., & Vereecken, H. (2012). New improved algorithm for sky calibration of L-band radiometers JLBARA and ELBARA II. In 2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad) Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1109/MicroRad.2012.6185259

@inproceedings{5f77069f58ae4b3c9ccd0c616e16e014,

title = "New improved algorithm for sky calibration of L-band radiometers JLBARA and ELBARA II",

abstract = "We propose a new algorithm for sky calibration of the L-band radiometers JLBARA and ELBARA II, introducing the effective transmissivities of the instruments. The suggested approach was tested using experimental data obtained at the Selhausen test site, Germany. It was shown that for JLBARA the effective transmissivities depend strongly on the air temperature and decrease with increasing air temperature, while for ELBARA II such strong dependence was not observed. It was also shown that the effective transmissivities account for the antenna and feed cable loss effects, and for the variations of the radiometer gain due to air temperature changes. The new calibration algorithm reduces significantly the bias of brightness temperature estimates for both radiometers, especially for JLBARA. {\textcopyright} 2012 IEEE.",

author = "Marin Dimitrov and Kostov, {K. G.} and Fran{\c c}ois Jonard and Khan Jadoon and Mike Schwank and Lutz Weiherm{\"u}ller and Normen Hermes and Vanderborght, {Jan P.} and Harry Vereecken",

note = "KAUST Repository Item: Exported on 2020-10-01",

year = "2012",

month = mar,

doi = "10.1109/MicroRad.2012.6185259",

language = "English (US)",

isbn = "9781467314701",

booktitle = "2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)",

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Dimitrov, M, Kostov, KG, Jonard, F, Jadoon, K, Schwank, M, Weihermüller, L, Hermes, N, Vanderborght, JP & Vereecken, H 2012, New improved algorithm for sky calibration of L-band radiometers JLBARA and ELBARA II. in 2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad). Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1109/MicroRad.2012.6185259

New improved algorithm for sky calibration of L-band radiometers JLBARA and ELBARA II. / Dimitrov, Marin; Kostov, K. G.; Jonard, François et al.
2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad). Institute of Electrical and Electronics Engineers (IEEE), 2012.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - New improved algorithm for sky calibration of L-band radiometers JLBARA and ELBARA II

AU - Dimitrov, Marin

AU - Kostov, K. G.

AU - Jonard, François

AU - Jadoon, Khan

AU - Schwank, Mike

AU - Weihermüller, Lutz

AU - Hermes, Normen

AU - Vanderborght, Jan P.

AU - Vereecken, Harry

N1 - KAUST Repository Item: Exported on 2020-10-01

PY - 2012/3

Y1 - 2012/3

N2 - We propose a new algorithm for sky calibration of the L-band radiometers JLBARA and ELBARA II, introducing the effective transmissivities of the instruments. The suggested approach was tested using experimental data obtained at the Selhausen test site, Germany. It was shown that for JLBARA the effective transmissivities depend strongly on the air temperature and decrease with increasing air temperature, while for ELBARA II such strong dependence was not observed. It was also shown that the effective transmissivities account for the antenna and feed cable loss effects, and for the variations of the radiometer gain due to air temperature changes. The new calibration algorithm reduces significantly the bias of brightness temperature estimates for both radiometers, especially for JLBARA. © 2012 IEEE.

AB - We propose a new algorithm for sky calibration of the L-band radiometers JLBARA and ELBARA II, introducing the effective transmissivities of the instruments. The suggested approach was tested using experimental data obtained at the Selhausen test site, Germany. It was shown that for JLBARA the effective transmissivities depend strongly on the air temperature and decrease with increasing air temperature, while for ELBARA II such strong dependence was not observed. It was also shown that the effective transmissivities account for the antenna and feed cable loss effects, and for the variations of the radiometer gain due to air temperature changes. The new calibration algorithm reduces significantly the bias of brightness temperature estimates for both radiometers, especially for JLBARA. © 2012 IEEE.

UR - http://hdl.handle.net/10754/564526

UR - http://ieeexplore.ieee.org/document/6185259/

UR - http://www.scopus.com/inward/record.url?scp=84860763004&partnerID=8YFLogxK

U2 - 10.1109/MicroRad.2012.6185259

DO - 10.1109/MicroRad.2012.6185259

M3 - Conference contribution

SN - 9781467314701

BT - 2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)

PB - Institute of Electrical and Electronics Engineers (IEEE)

ER -

New improved algorithm for sky calibration of L-band radiometers JLBARA and ELBARA II

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