These seem interesting with 5 MBPS OFDM downlink on 5.8 GHz.
I'm wondering if there are sufficient details published to do an SDR?
Bob N4HY
I have not seen ANY details published beyond what's in the IARU coordination request.
73,
Paul, N8HM
On Thu, Jan 25, 2018 at 12:49 PM, Robert McGwier rwmcgwier@gmail.com wrote:
These seem interesting with 5 MBPS OFDM downlink on 5.8 GHz.
I'm wondering if there are sufficient details published to do an SDR?
Bob N4HY
-- Bob McGwier Founder, Federated Wireless, Inc Founder and Technical Advisor, HawkEye 360, Inc Research Professor Virginia Tech Chief Scientist: The Ted and Karyn Hume Center for National Security and Technology Senior Member IEEE, Facebook: N4HYBob, ARS: N4HY Faculty Advisor Virginia Tech Amateur Radio Assn, Trustee K4KDJ Director of AMSAT Member of PVRC (Roanoke-Blacksburg), TAPR, life member of ARRL and AMSAT, NRVR.ORG (Rocketry) _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Hi Bob,
These seem interesting with 5 MBPS OFDM downlink on 5.8 GHz. I'm wondering if there are sufficient details published to do an SDR?
Here is a link to their IARU frequency coordination submission: http://www.amsatuk.me.uk/iaru/finished_detail.php?serialnum=556
While the frequencies are listed, the team did not provide many additional details about their ODFM. The submission form does have a contact e-mail though.
-- 73 de JoAnne K9JKM k9jkm@amsat.org
I emailed a couple of addresses associated with those satellites not long after launch but have not gotten any reply.
Here is a look at what is known so far in regard to their transmissions on 70cm:
http://destevez.net/2018/01/a-first-look-at-ty-2/
-Scott, K4KDR
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On Thu, Jan 25, 2018 at 12:56 PM, JoAnne K9JKM joanne.k9jkm@gmail.com wrote:
Hi Bob,
These seem interesting with 5 MBPS OFDM downlink on 5.8 GHz. I'm wondering if there are sufficient details published to do an SDR?
Here is a link to their IARU frequency coordination submission: http://www.amsatuk.me.uk/iaru/finished_detail.php?serialnum=556
While the frequencies are listed, the team did not provide many additional details about their ODFM. The submission form does have a contact e-mail though.
-- 73 de JoAnne K9JKM k9jkm@amsat.org
El 25/01/18 a las 18:49, Robert McGwier escribió:
These seem interesting with 5 MBPS OFDM downlink on 5.8 GHz.
I'm wondering if there are sufficient details published to do an SDR?
Bob N4HY
Hi Bob,
That would probably be hard. Most likely the 5GHz OFDM downlink only works by request of the groundstation. Also, a OFDM is rather complex to reverse engineer and such.
Let us first try to get some information from the team regarding the 70cm telemetry, since this transmits continuously and uses a much simpler protocol (but we're still unable to do much).
In any case, anyone with the appropriate receiver can give it a go and try to record the 5GHz downlink during a pass. If something shows up in the recording, it would be interesting and I would surely give it a good look.
73,
Dani.
participants (5)
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Dani EA4GPZ -
JoAnne K9JKM -
Paul Stoetzer -
Robert McGwier -
Scott