Challenges in application of Active Cold Loads for microwave radiometer calibration

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2012

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Two Active Cold Loads (ACLs) for microwave radiometer calibration, operating at X-band, are evaluated with respect to important stability parameters. Using a stable radiometer system as test bed, absolute levels of 77 K and 55 K are found. This paper identifies and summarizes potential challenges and uncertainties in future application of ACLs in air and space borne missions, and important parameters, such as temperature sensitivity and long term stability are addressed. For the devices under test, temperature sensitivities are found to be in the range from 0.2 K/°C to 0.4 K/°C, and typical long term drift up to 1.5 K/year is estimated.
Original languageEnglish
TitleProceedings of the 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)
Number of pages4
Place of publicationRome
PublisherIEEE
Publication date2012
ISBN (print)978-1-4673-1468-8
DOIs
StatePublished

Conference

Conference12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)
Number12
CountryItaly
CityRome
Period05/03/1209/03/12
Internet addresshttp://www.microrad2012.org/
CitationsWeb of Science® Times Cited: No match on DOI

Keywords

  • Calibration, Radiometry, Switches, Temperature measurement, Temperature sensors, Thermal stability, Active cold load, Radiometer
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