earth online



L-band radiometer onboard a C-130 aircraft
EMIRAD L-band radiometer onboard a C-130 aircraft.
Position during take-off and landing.

What was the purpose of LOSAC?

L-band Ocean Salinity Airborne Campaign (LOSAC) is a part of the preparation for ESA's SMOS mission, and the overall interest is to understand the nature of the wind driven signatures in order to evaluate, if corrections are necessary prior to salinity estimations based on the radiometer signals.

What was the outcome of LOSAC?

The LOSAC campaign was planned to identify eventual azimuth dependence over a full circle signature, carried out over the ocean. This has been done in six flights, providing six different wind conditions. At first sight all data show large peak-to-peak variations, typically in the order of many Kelvin. From a single circle, the identification of polarimetric signatures in the order of 100 mK is hence difficult or impossible.

Download the LOSAC campaign final report

L-band radiometer onboard a C-130 aircraft
EMIRAD L-band radiometer - the antenna in measurement
position at 23 degree depression angle.
Campaign Summary
Data Coverage (Year)2000-2002
Geographic SiteNorth Sea
Field of ApplicationOcean
Data Size0.8 MB
Workshop Proceedingsesa sp-525

Digital Object Identifier: - LOSAC: "The L-band Ocean Salinity Airborne Campaign, LOSAC"


The campaign data is available online via FTP upon submission of a data access request. An active EO Sign In account is required to submit the request.

For further information about the EO Sign In Service you can visit TellUs

Should you need support please contact EOHelp