[amsat-bb] LF Satellite ideas?

Bob Bruninga bruninga at usna.edu
Sat Dec 11 11:13:33 PST 2010

Is 137 KHz possible from space?

Our next Cubesat will have a 1100 meter long antenna (think tether satellite).  It will ultimatelly be an electrodynamic tether but the first one will have NO ACTIVE ELECTRONICS connected to the tether.

So I have asked them to make it 1100m long instead of a generic 1km tether to try to make it resonant in an amateur band.  THe path loss at 137 KHz is 60 dB LESS than it is at 2 meters, so it shouldn't take much to communicate with an 1100m long antenna.

I'm sorry I didnt think of this sooner, but I need a real SCIENCE justification for this.  Maybe LF that low will never punch through the ionosphere, or maybe it will be completely absorbed.  Can give good science on this idea?


More information about the AMSAT-BB mailing list