Spectral overview taken with Callisto during ISWI MAGDAS workshop in Cianjur, Indonesia. Green markers show frequency ranges which are protected for Radio Astronomy but shared with other services. The whole range might be used for solar observations except the FM range with strong local transmitters. Even in the TV range above 500 MHz there are still quite a lot of channels available for scientific observations.
0 dB interference corresponds to a noise temperature of 10 dB which is about 3'000 Kelvin
Integration time = 1 msec
Radiometric bandwidth = 300 KHz
Antenna was omni directional with 0 dB of gain at 50 ohm impedance
Plot comprizes 13'200 frequency channels between 45.0 MHz and 870 MHz