Aaah Trevor, you raise another important issue!
It is the convention (I can't cite the international rules here) that
all communication/telemetry satellites have the ability to be commanded
off. Clearly the Sprites don't presently have that capability.
Additionally, I don't believe that just because they are in the
unlicensed bands, that they would be permitted to use those bands in
space. But I'm not clear here. Perhaps an experimental license could be
granted to operate in space by our FCC but that would only be good over
the US. Again the command/control issue comes into play.
I have had several emails with Zac and he's very receptive to getting
our comments. I also encouraged him to forge ahead while trying to
understand some of these sticky issues. His concept surely would push
the envelope of current Amateur communications and satellite "art" and
that's worthy of this efforts.
What will be interesting is the reported 10 mw telemetry beacon being
used by SRMSAT, since that's the EIRP the Sprite is planning to have. So
a "real" test at that power level is eminent. Good luck on the launch!!!
Regards...Bill - N6GHz
On 10/10/2011 3:07 PM, Trevor . wrote:
--- On Mon, 10/10/11, Tony Langdon<vk3...@gmail.com> wrote:
Still seems a strange choice of frequency, given that GSM
phones use these frequencies in many parts of the world.
ITU Region 1 seems to be moving closer to permitting unlicensed low power use,
RFID etc, around 915-921 MHz but as you say the rest is mobile phones.
Given there is no mechanism to command these Sprite ChipSats so they are only
on over the USA the use of 902 MHz would seem inapropriate.
73 Trevor M5AKA
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