[amsat-bb] AO-85 high speed data/telemetry testing Dec. 29-30, 2015
scott23192 at gmail.com
Sun Dec 27 04:06:59 UTC 2015
Nice overhead pass of AO-85 just now; decoded 52 packets with v1.03a of
FoxTelem in auto mode.
Question: Even though I heard a couple of stations attempting to work the
voice transponder, there seemed to be a constant carrier that looked like
data to me. Quite different from the sub-audio data that I have copied in
the past. On the SDR waterfall, it occupied maybe 12-15k KHz of the RF
spectrum, I believe. Has something changed since the last time I
downloaded AO-85 telemetry? Any idea what I was seeing? Were BOTH the
voice transponder and high-speed data on at the same time somehow?
IQ recording available if needed.
-Scott, K4KDR FM17es
Montpelier, VA USA
On Fri, Dec 25, 2015 at 12:59 PM, Mark L. Hammond <marklhammond at gmail.com>
> Hello All,
> Greetings. In an effort to test a new autobaud selection feature in
> FoxTelem 1.03, the Operations Team will be conducting some experimental
> sessions with AO-85 next week (Dec. 29 and 30, 2015).
> Telemetry collectors in/near the US are encouraged to participate and help
> with testing the autobaud selection feature by installing the 1.03 test
> version available here:
> I suggest you do a clean/fresh install in a new folder so you can always
> go back to 1.02 if you prefer. (It's possible to upgrade only the new
> files, but if you have to ask how, you'd better not do it ;))
> You'll see a new "Auto" button option, next to the Low and High speed
> buttons; use it.
> Specifically, during the following passes we'll be switching from the
> current voice transponder operation with low speed telemetry, to high speed
> telemetry (Note: in high speed mode, voice operations are OFF). The
> switches will take place about every minute or two during the pass. Please
> avoid making contacts during these testing periods.
> 29.12.2015 AO-85 11:19 11:32 UTC
> 29.12.2015 AO-85 13:00 13:12 UTC
> 30.12.2015 AO-85 11:45 11:59 UTC
> During 2016, two or three more Fox satellites are planned for launch into
> orbit, and these birds will need to operate in high speed data mode from
> time to time to download space photos, experimental data, etc. Taking
> advantage of some in orbit testing with Fox-1A/AO-85 will be very helpful
> to the further development of the FoxTelem ground station software. All
> the thanks go to Chris Thompson AC2CZ for his extraordinary efforts on the
> telemetry software (both client and server side)!
> Feedback about your experiences will be appreciated. Email to the list is
> preferred so all can learn.
> Mark L. Hammond [N8MH]
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