Absolute temperature stability of passive imaging radiometers

Neil Anthony Salmon; Jonathan R. Borrill; David G. Gleed

doi:10.1117/12.277072

27 June 1997 Absolute temperature stability of passive imaging radiometers

Neil Anthony Salmon, Jonathan R. Borrill, David G. Gleed

Proceedings Volume 3064, Passive Millimeter-Wave Imaging Technology; (1997) https://doi.org/10.1117/12.277072
Event: AeroSense '97, 1997, Orlando, FL, United States

Abstract

A challenge in the development of multi-channel millimeter wave imaging radiometers is overcoming effects associated with the temperature dependence of receiver responsivity. In this paper, the stability of absolute radiation temperature measurements, made with direct and heterodyne detection radiometers, is investigated theoretically and experimentally. The agreement between theory and experiment is found to be good. Changes in measured radiation temperatures were found to be between 6 degree(s)K at 35 GHz and 145 degree(s)K at 220 GHz, for a one degree change in instrumental temperature. Suggestions are made, as to how the temperature stability of radiometers may be improved.

Citation Download Citation

Neil Anthony Salmon, Jonathan R. Borrill, and David G. Gleed "Absolute temperature stability of passive imaging radiometers", Proc. SPIE 3064, Passive Millimeter-Wave Imaging Technology, (27 June 1997); https://doi.org/10.1117/12.277072

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