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| Title:
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Challenges in application of Active Cold Loads for microwave radiometer calibration |
| Type:
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Article in proceedingsArticle in proceedings |
| Participant(s):
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Technical University of Denmark
Email:
National Space Institute, Technical University of Denmark, 0rsteds Plads, Bygning 348, 2800 Kongens Lyngby, Denmark
Email:
National Space Institute, Technical University of Denmark, 0rsteds Plads, Bygning 348, 2800 Kongens Lyngby, Denmark
Email:
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| Abstract:
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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. |
| Published:
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part of: Proceedings of the 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad) (ISBN: 978-1-4673-1468-8), 2012, IEEE, Rome |
| DOI:
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| Presented at:
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12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad), Rome |
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