Definition of standards and methods of calibrating for Imaging Microwave Radiometers (IMR)
Abstract
Two extremely high frequency (23.8 and 36.5 GHz) noise sources, cooled by liquid nitrogen, with passband frequency = 1 GHz, were developed for IMR calibration. Error analysis shows that maximum peak error is + or - 0.21 K for the 23.8 GHz source, + or - 0.4 K for the 36.5 GHz source, with maximum probable error + or - 0.13 and + or - 0.22 K respectively. Functional autonomy is assured by regulating the level of liquid nitrogen.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- March 1982
- Bibcode:
- 1982STIN...8329671A
- Keywords:
-
- Calibrating;
- Extremely High Frequencies;
- Microwave Radiometers;
- Standardization;
- Error Analysis;
- Liquid Nitrogen;
- Low Temperature Tests;
- Noise Generators;
- Temperature Effects;
- Waveguides;
- Instrumentation and Photography