Author: SM0TGU

SSTL har meddelat att UO-22 r i s dligt skick att den snart att ha ntt sitt slut. Satelliiten har varit aktiv sedan 1991. Se nedanstende:

AMSAT-UK have been informed by SSTL that UO-22 is not in good shape, and its looks as though its useful life may be over. The SSTL Ground Station control centre at the University of Surrey have attempted several times in recent weeks to reactivate the satellite.

After one attempt it did come back to life, but only briefly. Other attempts have failed completely. As time permitts, the Control Station may make further attempts at reactivation, but it seems unlikely that they will be completely successful.

The cause if the satellite s demise is unknown, but may be related to the batteries which have been in space for more than 10 years, or to the fact that the satellite is very hot due to the orbit preccessing such that it is generall in full sunlight. The elevated temparature was causing problems with the receivers, as well as the battery.
UO-22 was laaunched in July 1991 from Kourou, French Guiana, and served for many years as the store and forward satellite for the Amateur Radio Packet Radio world wide SatGate service, which linked packet radio networks in many countries.

Klla: ANS 298

Fljande schema gller numera fr Echo under resten av september och hela oktober:
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Update 27 Sept — Schedule and Info

Echo Schedule for October listed below.

FM Repeat and 9k6 BBS Open — 27 Sept thru 28 Sept

FM repeat mode OPEN
Uplink 145.920 FM with 67 hz tone
Downlink 435.300 FM

FM 9k6 BBS mode OPEN for user activity, uploading of messages and small to
moderate filesize pictures is OK
FM 9k6 BBS mode OPEN
Uplink 145.860 FM 9k6 digital, PBP
Downlink 435.150 FM 9k6 digital, PBP

Experimenters Wednesday for 29 September

PSK31 Test (Round 2)

Uplink: 28.140 USB PSK31 ONLY
Downlink: 435.300 FM, 1 watt output

October 2004 AO-51 (Amsat Echo) Schedule
Updated 27 Sep 2004

Sep 30
FM Repeater, V/U, High Power Mode ON
9k6 Digital, V/U, PBP BBS OFF, TXA OFF

Oct 6 Experimenters Wednesday
38k4 Digital Downlink, V/U, PBP BBS OPEN for Users
FM Repeater OFF, TXB OFF

Oct 7
FM Repeater, V/U, ON
9k6 Digital, V/U, PBP BBS, OPEN for Users

Oct 13 Experimenters Wednesday
No Mode Change Scheduled, Continue current Mode

Oct 14
FM Repeater, V/U, ON
9k6 Digital, V/U, PBP BBS, OPEN for Users

Oct 20 Experimenters Wednesday
FM Repeater, L/U, ON, Output Power TBD
9k6 Digital, V/U, PBP BBS OFF, TXA OFF

Oct 21
FM Repeater, L/S, ON
9k6 Digital, V/U, PBP BBS OFF, TXA OFF

Oct 27 Experimenters Wednesday
TBD, Check back later for Planned Mode

Klla: AMSAT-NA

Nu p onsdag 22/9 krs 38k4-tester p AO-51 enligt nedanstende:

Experimenters Wednesday for 22 September

Start: 22 Sep at 0145 utc
End: 23 Sep at 0245 utc

38k4 BBS mode. We will open the BBS up for user testing with the 38k4 downlink. The uplink will be at 9k6.

Uplink: 145.860 FM, 9k6 Digital, Pacsat Broadcast Protocol (PBP)
Downlink: 435.150 FM, 38k4 Digital, PBP, 1 watt output

Klla: AMSAT-NA