This routine calculates the maximum acceptable e.i.r.p. of terrestrial transmitters that must be respected to protect
the Radio Astronomy Service using a free space propagation model given in Recommendation ITU-R P.525 while to estimate the atmospheric
attenuation, Recommendation ITU-R P.676 is used.
This routine can also be used to estimate
the separation distance between the transmitter and the radio astronomy station for an aggregate of transmitting devices. In this, calculations are done
for different minimum distance values until the maximum tolerable e.i.r.p. is reached.
The calculation uses the geographic summation methodology. Since a generic solution is anticipated, no terrain model is included.
The protection criteria for Radio Astronomy is given in Recommendation ITU-R RA.769.
The tolerable data loss to radio astronomy observations and percentage-of-time
criteria resulting from degradation by interference for frequency bands
allocated to the radio astronomy on a primary basis are given in Recommendation ITU-R RA.1513.