Various calculations

• Conversion from pfd level (dB(W/m²)) into field-strength (dB(microVolt/meter)) and e.i.r.p. (dBm)
• Conversion from pfd level (dB(W/m²)) into e.i.r.p. (dBm)
• Conversion from erp (dBm) to e.i.r.p. (dBm)
• Conversion from e.i.r.p. (dBm) into pfd level (dB(W/m²))
• Conversion from e.i.r.p.(dBm) into field-strength (dB(microVolt/meter)), pfd level (dB(W/m²) and power level (dBW)
• Conversion from field-strength (dB(microVolt/meter)) into pfd level (dB(W/m²))
• Conversion from power (dB(W)) to power flux density, pfd, (dB(W/m²))
• Conversion from hour angle and declination to azimuth and elevation

• Estimates of sensitivity and detrimental interference levels for radio astronomy (Rec. ITU-R RA.769)
• Impact on the radio astronomy service of unwanted emissions in excess of the levels defined by Recommendation ITU-R RA.769. (Re: ITU-R 1-7/26 (2001) and ITU-R SM.1633)
• Estimate of visibility radius from a space station, aeronautical station or HAPS station to a radio astronomy station

• Estimate of acceptable e.i.r.p. of interfering transmitter using free space attenuation (Rec. ITU-R P.525)
• Estimate of acceptable e.i.r.p. of interfering transmitter (for frequencies above 0.7 GHz) (Rec. ITU-R P.452)
• Estimate of acceptable e.i.r.p. of interfering transmitter (for frequencies between 0.1 and 105 GHz) (Rec. ITU-R P.620)
• Calculation of pfd value at the surface of the Earth for FSS satellite

• Transmission loss for specified distance between transmitter and receiver (for frequencies above 0.7 GHz) (Rec. ITU-R P.452)
• Path loss attenuation for specified distance between transmitter and receiver (Rec. ITU-R P.525)
• Transmission loss for diffraction scenario for specified distance between transmitter and receiver (Rec. ITU-R P.452 and P.526)

• Rough separation distance estimate from e.i.r.p. and pfd for single interferer and simple free space propagation
• Separation distances required for sharing (Rec. ITU-R P.452)
• Separation distances for short range devices required to protect a radio astronomy station (Rec. ITU-R P.452)
• Separation distances for short range devices required to protect victim service (Rec. ITU-R P.1411 - using free space approach)
• Separation distances for terrestrial transmitting stations using free space attentuation (Rec. ITU-R P.525)
• Separation distances for land MESs at 1.6 GHz (ERC Report 26)
• Separation distances for terrestrial transmitting stations (ERC Report 26 and for frequencies between 0.7 and 30 GHz)

• SEAMCAT