The development of a cryogenically cooled filter radiometer for use with high altitude balloons is discussed. The radiometer has features which include the options for remote operation of two filter wheels each containing six filters at helium temperature and a cryogenic rotary chopper which may be run at 200 cycles per second or positioned open or closed, and a remotely operable chopped blackbody calibration source. The radiometer contains a ten inch diameter liquid nitrogen cooled Cassegrain telescope with nine individually filtered field stops in the focal plane. The telescope is mounted on a two-axis servo operated gimbal which is used to make sky scans under the control of an onboard programmer.
A balloon-borne cryogenically cooled filter radiometer
1974-11-01
Conference paper
No indication
English
BaR-SPOrt: Balloon-Borne Radiometer for Sky Polarisation Observations
British Library Conference Proceedings | 2001
|SIRTF, A Cryogenically Cooled IR Telescope
SPIE | 1986
|Flight Testing of a Cryogenically Cooled Hygrometer
NTIS | 1973
|Microwave Loss Reduction in Cryogenically Cooled Conductors
British Library Online Contents | 2008
|