Solar Submillimeter-wave Telescope

   Description of SST 212 and 405 GHz real-time qualitative monitoring

1. Upper plots are in relative units, proportional to the antenna temperatures for the channels 2 (212 GHz) and 5 (405 GHz).
2. Lower plots are scintillation indices for channels 2 and 5, defined as the ratio of the 50 ms data sigma of fluctuations over the solar mean value above the sky level, taken every 3 seconds. Indices are useful for quick detection of:
   (a) a genuine solar pulsating burst;
   (b) atmospheric transmission fluctuations;
   (c) system malfunctions.
3. The cluster of six beams, shown in the diagram, is directed to the active region selected for tracking. Tracking is positioned on beam 5.

4. Fluxes can be determined ONLY after two corrections are made:
   (a) the source actual spatial position with respect to all beams as calculated by comparing the outputs from 212 GHz beams 2,3 and 4;
   (b) correction for atmosphere transmission, dependent on elevation angle (which are larger at 405 GHz).
5. Plots show calibrations, solar maps, and sky temperature vs. elevation scans used to calculate atmosphere opacity. They are useful as qualitative information on the quality of observations and of sky transmission.

   Corrected data on events can be calculated and made available under request.