As one goes up in frequency the Doppler goes up. That said, these would be great on a geostationary bird or something that moved much slower than the short Leo passes for most of our satellites. There are some satellites build and pending launch for amsat phase IV in geosynchronous orbit. Those launches are not cheap though and rides are much more difficult to come by. At least a few of the sats awaiting launches will use the microwave bands you speak of for their uplink and downlink. The advantage of using that spectrum is multiple MHZ of passband (think the entirety of all amateur spectrum 6m and below easily on one transponder 24x7x~365.25 to anyone in the footprint. It would be nice if amsat would provide better support for these projects and the teams that work on them.
Eric
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On Jul 16, 2018, at 5:29 AM, Samudra Haque [TTLLC] [email protected] wrote:
Hi, I am experimenting with RF carriers above 2 GHz in my lab. According to FCC and ITU tables there are several AMATEUR-SATELLITE bands allocated above 2 GHz, to very very high frequencies.
What is the status of those frequencies in terms of past, present or planned utilization on AMSAT / other satellites ?
If those bands haven't been used, should they be not used or plans to use them to protect them from being de-assigned to other services? Is there room for experimental RF super high frequency and extremely high frequency payloads on any mission to make some use of these great resource?
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