MMA Memo: 225: Radiometer Calibration at the Cassegrain Secondary Mirror

@inproceedings{Fleming1998MMAM2,
  title={MMA Memo: 225: Radiometer Calibration at the Cassegrain Secondary Mirror},
  author={Matt Fleming},
  year={1998}
}
The technique presently used at most millimeter telescopes is the "Chopper Wheel Method" introduced by Penzias and Burrus (ARAA, 1973, 11,51), in which the output de ection of an observed source is compared with the di erence between the sky brightness and that of an ambient temperature load. The physical temperature of the absorbing atmosphere is then… CONTINUE READING