The COSETI Observatory
Relative Antenna Gains.
- Optical transmitters can have effective isotropic radiated powers (EIRPs) 100 million times stronger than their microwave counterparts for the same transmitter power. A 10-meter Keck-type optical telescope can be 80 dB more powerful than a 300-meter Arecibo-type radio telescope.
- Many in the MSETI community would suggest that transmitter antenna gains in excess of 74 to 94 dB are not practical because of the point-ahead targeting problem. However, other OSETI researchers have suggested optical transmitter gains as high as 174 dB. Stuart Kingsley has proposed gains as high as 154 dB
- (> 1015).
Relative Doppler Shifts.
- Over 100,000 times greater at optical frequencies.