Influence from Polarized Galactic Background Noise on L-band Measurements of the Sea Surface Salinity

Sten Schmidl Søbjærg; Niels Skou

doi:10.1109/IGARSS.2004.1368669

Influence from Polarized Galactic Background Noise on L-band Measurements of the Sea Surface Salinity

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

390 Downloads (Orbit)

Abstract

The polarimetric EMIRAD radiometer, based on novel digital down conversion and detection techniques, has been installed on a C-130 aircraft from the Royal Danish. Air Force during the L-band Ocean Salinity Airborne Campaign (LOSAC) in 2001 and 2003. Full 360° circle flight patterns around the same target area as well as clover leaf patterns have been measured, and both provide an azimuth signature of the ocean at a constant incidence angle. The resulting azimuth signatures show significant variations in all the three first Stokes parameters, and a correlation is found between the downwelling galactic background signal and the measured results. The measured 3rd Stokes parameter has variations of the same order of magnitude as the two linear polarizations, and to verify this result, an experiment for direct observation of the sky over long time is set up. This experiment confirms the presence of a polarized galactic background signal, and conclusions are made with respect to the necessity for polarimetric corrections in future measurements over the sea at L-band.

Original language	English
Title of host publication	Proceedings of IGARSS'04
Number of pages	4
Volume	2
Publisher	IEEE
Publication date	2004
ISBN (Print)	0-7803-8742-2
DOIs	https://doi.org/10.1109/IGARSS.2004.1368669
Publication status	Published - 2004
Event	2004 IEEE International Geoscience and Remote Sensing Symposium - Anchorage, United States Duration: 20 Sept 2004 → 24 Sept 2004 http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=9436

Conference

Conference	2004 IEEE International Geoscience and Remote Sensing Symposium
Country/Territory	United States
City	Anchorage
Period	20/09/2004 → 24/09/2004
Internet address	http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=9436

Bibliographical note

Copyright: 2004 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

Access to Document

10.1109/IGARSS.2004.1368669

SkouFinal published version, 430 KB

OpenUrl availability

Check availability in DTU Findit

Cite this

@inproceedings{194c7146de9f41cb8b100562602fde2a,

title = "Influence from Polarized Galactic Background Noise on L-band Measurements of the Sea Surface Salinity",

abstract = "The polarimetric EMIRAD radiometer, based on novel digital down conversion and detection techniques, has been installed on a C-130 aircraft from the Royal Danish. Air Force during the L-band Ocean Salinity Airborne Campaign (LOSAC) in 2001 and 2003. Full 360° circle flight patterns around the same target area as well as clover leaf patterns have been measured, and both provide an azimuth signature of the ocean at a constant incidence angle. The resulting azimuth signatures show significant variations in all the three first Stokes parameters, and a correlation is found between the downwelling galactic background signal and the measured results. The measured 3rd Stokes parameter has variations of the same order of magnitude as the two linear polarizations, and to verify this result, an experiment for direct observation of the sky over long time is set up. This experiment confirms the presence of a polarized galactic background signal, and conclusions are made with respect to the necessity for polarimetric corrections in future measurements over the sea at L-band.",

author = "S{\o}bj{\ae}rg, \{Sten Schmidl\} and Niels Skou",

note = "Copyright: 2004 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE; 2004 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2004 ; Conference date: 20-09-2004 Through 24-09-2004",

year = "2004",

doi = "10.1109/IGARSS.2004.1368669",

language = "English",

isbn = "0-7803-8742-2",

volume = "2",

booktitle = "Proceedings of IGARSS'04",

publisher = "IEEE",

address = "United States",

url = "http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=9436",

}

TY - GEN

T1 - Influence from Polarized Galactic Background Noise on L-band Measurements of the Sea Surface Salinity

AU - Søbjærg, Sten Schmidl

AU - Skou, Niels

N1 - Copyright: 2004 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

PY - 2004

Y1 - 2004

N2 - The polarimetric EMIRAD radiometer, based on novel digital down conversion and detection techniques, has been installed on a C-130 aircraft from the Royal Danish. Air Force during the L-band Ocean Salinity Airborne Campaign (LOSAC) in 2001 and 2003. Full 360° circle flight patterns around the same target area as well as clover leaf patterns have been measured, and both provide an azimuth signature of the ocean at a constant incidence angle. The resulting azimuth signatures show significant variations in all the three first Stokes parameters, and a correlation is found between the downwelling galactic background signal and the measured results. The measured 3rd Stokes parameter has variations of the same order of magnitude as the two linear polarizations, and to verify this result, an experiment for direct observation of the sky over long time is set up. This experiment confirms the presence of a polarized galactic background signal, and conclusions are made with respect to the necessity for polarimetric corrections in future measurements over the sea at L-band.

AB - The polarimetric EMIRAD radiometer, based on novel digital down conversion and detection techniques, has been installed on a C-130 aircraft from the Royal Danish. Air Force during the L-band Ocean Salinity Airborne Campaign (LOSAC) in 2001 and 2003. Full 360° circle flight patterns around the same target area as well as clover leaf patterns have been measured, and both provide an azimuth signature of the ocean at a constant incidence angle. The resulting azimuth signatures show significant variations in all the three first Stokes parameters, and a correlation is found between the downwelling galactic background signal and the measured results. The measured 3rd Stokes parameter has variations of the same order of magnitude as the two linear polarizations, and to verify this result, an experiment for direct observation of the sky over long time is set up. This experiment confirms the presence of a polarized galactic background signal, and conclusions are made with respect to the necessity for polarimetric corrections in future measurements over the sea at L-band.

U2 - 10.1109/IGARSS.2004.1368669

DO - 10.1109/IGARSS.2004.1368669

M3 - Article in proceedings

SN - 0-7803-8742-2

VL - 2

BT - Proceedings of IGARSS'04

PB - IEEE

T2 - 2004 IEEE International Geoscience and Remote Sensing Symposium

Y2 - 20 September 2004 through 24 September 2004

ER -

Influence from Polarized Galactic Background Noise on L-band Measurements of the Sea Surface Salinity

Abstract

Conference

Bibliographical note

Access to Document

OpenUrl availability

Fingerprint

Cite this