Performance Measurements on Active Cold Loads for Radiometer Calibration

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Abstract

Two semi-conductor Active Cold Loads (ACLs) to be used as cold references in spaceborne microwave radiometers have been developed. An X-band frequency has been chosen, and the target noise temperature value is in the 50 to 100 K range. The ACLs are to be characterized in the operating temperature range 0-50 degrees C, and long term stability must be assessed. To this end a Test Bed has been developed. This Test Bed is actually a stable radiometer, and its design and development is discussed. The test setup is described, and preliminary test campaign results indicate output temperatures of 73 K and 51 K for the two ACLs. The temperature sensitivity is slightly below 0.4 K/degrees C for the units, and excellent stability seems to prevail.
Original languageEnglish
Title of host publicationIGARSS: 2007 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM : SENSING AND UNDERSTANDING OUR PLANET
PublisherIEEE
Publication date2007
Pages2431-2434
ISBN (Print)978-1-4244-1211-2
DOIs
Publication statusPublished - 2007
Event2007 IEEE International Geoscience and Remote Sensing Symposium - Barcelona, Spain
Duration: 23 Jul 200728 Jul 2007
http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=4422707

Conference

Conference2007 IEEE International Geoscience and Remote Sensing Symposium
CountrySpain
CityBarcelona
Period23/07/200728/07/2007
Internet address

Bibliographical note

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