27 Dec. 2009 XW-1 Linear Tansponder Turn On: 20:20...South Africa 20:30...Europe,North Africa 20:40...Europe,North America, North Africa,North Pole 20:50...North America, Europe,North Pole 20:55...Turn Off
28 Dec. 2009 XW-1 Linear Tansponder Turn On: 01:40...South America 01:55...North South America,South NA 02:10...North America 02:15...North NA,Russia,North Pole 02:20...Turn Off
28 Dec. 2009 XW-1 Linear Tansponder Turn On: 12:31...South Australia,South Pole 12:35...Australia,South Pole 12:41...Turn Off
28 Dec. 2009 XW-1 FM and Digital Transponder Turn On: 12:51...South Asia, North Australia 12:55...East Asia, South Asia 13:05...East Asia, North Asia, Middle Asia 13:06...Turn Off
28 Dec. 2009 XW-1 Linear Tansponder Turn On: 21:45...South Africa 21:55...South America,West Africa 22:05...West Europe, West North Africa 22:15...North America, Europe,North Pole 22:20...North America, North Europe, North Asia,North Pole 22:25...Turn Off
73 Alan Kung, BA1DU HO-68(XW-1) Project Manager www.camsat.cn
First, thank you to CAMSAT for this wonderful satellite!!!
Alan: would it be possible to schedule the satellite for passes over North America in FM mode, but with tone access turned off? It would be very interesting to see if it is easier to access without the tone requirement.
Thank you.
George, KA3HSW
Yesterday afternoon, Mark, N8MH and myself ran a little experiment on AO-51. We linked the SQRX receiver, listening on 145.825, to the 435.150 transmitter for several minutes over the eastern US. I wanted to see how congested the 145.825 uplink was with unattended packet beacons. We heard about a dozen packets, about two per minute. Most of them were not very strong.
The implication here is that HO-68 may be impacted by these unattended beacons while in FM/Packet mode, but not very much. Most users would have much stronger signals, and the interference is typically very short in duration. PL issues, and interference between the Voice and Packet system over densely populated areas is a separate issue.
73, Drew KO4MA
Also, the interfering packet(I'm assuming you're talking about packet's attempting to get digi'd by ISS and PCSAT) won't get acknowledged(or processed as a packet) by HO-68 as the digi(BBS) callsign is incorrect. So, these would only effect someone in the immediate area of the offending unattended station, On the uplink only. On the other hand, I myself would of chose a different uplink frequency. I also agree it still looks like an overuse, and PL issue. When the newness wears off, HO-68 in FM mode will work just fine, except on FD :)
73 Jeff kb2m
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Andrew Glasbrenner Sent: Sunday, December 27, 2009 12:59 PM Cc: [email protected] Subject: [amsat-bb] HO-68 145.825 uplink
Yesterday afternoon, Mark, N8MH and myself ran a little experiment on AO-51. We linked the SQRX receiver, listening on 145.825, to the 435.150 transmitter for several minutes over the eastern US. I wanted to see how congested the 145.825 uplink was with unattended packet beacons. We heard about a dozen packets, about two per minute. Most of them were not very strong.
The implication here is that HO-68 may be impacted by these unattended beacons while in FM/Packet mode, but not very much. Most users would have much stronger signals, and the interference is typically very short in duration. PL issues, and interference between the Voice and Packet system over densely populated areas is a separate issue.
73, Drew KO4MA _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
participants (4)
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Alan Kung -
Andrew Glasbrenner -
George Henry -
Jeff KB2M