Challenges in application of Active Cold Loads for microwave radiometer calibration

Sten Schmidl Søbjærg; Jan E. Balling; Niels Skou

doi:10.1109/MicroRad.2012.6185258

Challenges in application of Active Cold Loads for microwave radiometer calibration

Sten Schmidl Søbjærg, Jan E. Balling, Niels Skou

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

Abstract

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 language	English
Title of host publication	Proceedings of the 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)
Number of pages	4
Place of Publication	Rome
Publisher	IEEE
Publication date	2012
ISBN (Print)	978-1-4673-1468-8
DOIs	https://doi.org/10.1109/MicroRad.2012.6185258
Publication status	Published - 2012
Event	12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment - Tor Vergata University of Rome Villa Mondragone, Rome, Italy Duration: 5 Mar 2012 → 9 Mar 2012 Conference number: 12 http://www.geok.it/microrad2012/index.html

Conference

Conference	12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment
Number	12
Location	Tor Vergata University of Rome Villa Mondragone
Country/Territory	Italy
City	Rome
Period	05/03/2012 → 09/03/2012
Internet address	http://www.geok.it/microrad2012/index.html

Keywords

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

Access to Document

10.1109/MicroRad.2012.6185258

OpenUrl availability

Full text

Cite this

@inproceedings{43561e7a41bd431889c2c0928072e428,

title = "Challenges in application of Active Cold Loads for microwave radiometer calibration",

abstract = "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.",

keywords = "Calibration, Radiometry, Switches, Temperature measurement, Temperature sensors, Thermal stability, Active cold load, Radiometer",

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

year = "2012",

doi = "10.1109/MicroRad.2012.6185258",

language = "English",

isbn = "978-1-4673-1468-8",

booktitle = "Proceedings of the 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)",

publisher = "IEEE",

address = "United States",

note = "12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment, MicroRad 2012 ; Conference date: 05-03-2012 Through 09-03-2012",

url = "http://www.geok.it/microrad2012/index.html",

}

Søbjærg, SS , Balling, JE & Skou, N 2012, Challenges in application of Active Cold Loads for microwave radiometer calibration. in Proceedings of the 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad). IEEE, Rome, 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment, Rome, Italy, 05/03/2012. https://doi.org/10.1109/MicroRad.2012.6185258

Challenges in application of Active Cold Loads for microwave radiometer calibration. / Søbjærg, Sten Schmidl ; Balling, Jan E.; Skou, Niels.

Proceedings of the 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad). Rome : IEEE, 2012.

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

TY - GEN

T1 - Challenges in application of Active Cold Loads for microwave radiometer calibration

AU - Søbjærg, Sten Schmidl

AU - Balling, Jan E.

AU - Skou, Niels

N1 - Conference code: 12

PY - 2012

Y1 - 2012

N2 - 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.

AB - 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.

KW - Calibration

KW - Radiometry

KW - Switches

KW - Temperature measurement

KW - Temperature sensors

KW - Thermal stability

KW - Active cold load

KW - Radiometer

U2 - 10.1109/MicroRad.2012.6185258

DO - 10.1109/MicroRad.2012.6185258

M3 - Article in proceedings

SN - 978-1-4673-1468-8

BT - Proceedings of the 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)

PB - IEEE

CY - Rome

T2 - 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment

Y2 - 5 March 2012 through 9 March 2012

ER -

Challenges in application of Active Cold Loads for microwave radiometer calibration

Abstract

Conference

Keywords

Access to Document

OpenUrl availability

Fingerprint

Cite this