1
VR2GY 發表於 31-10-2011 22:59 static/image/common/back.gif
1
November 29, 2011
It is with a heavy heart I report that AO-51 has ceased transmission and is not responding to commands. The last telemetry data indicated that the third of six batteries was approaching failure to short, and observations indicate the voltage from three cells is insufficient to power the UHF transmitters. The IHU may continue to be operative. Initial tests with the S band transmitter were also not positive, although more attempts are in order. We have tried leaving the satellite in an expected state where if voltages climb high enough, the 435.150 transmitter may possibly be heard.
The command team will regularly attempt communications with the satellite over the coming months (and years). There is always the possibility that a cell will open and we could once again talk to our friend while illuminated. Thanks to all who helped fund, design, build, launch, command, and operate AO-51. It's 7 year mission has been extraordinary. Please support AMSAT's Fox-1 project, and other AMSAT projects worldwide with your time and money.
For the AO-51 Command Team,
73, Drew KO4MA
AMSAT-NA VP Operations
本帖最後由 VR2VBU 於 1-12-2011 09:20 編輯
VR2VBU 發表於 30-11-2011 18:03 static/image/common/back.gif
November 29, 2011
It is with a heavy heart I report that AO-51 has ceased transmission and is n ...
英文內容翻譯為中文, 如容如下 ---由 VR2VBU-2 翻譯
2011年11月29日
我以沉重的心情來報告，AO- 51已停止傳輸且無法接受指令。最後的遙測數據資料顯示，在六組電池中, 有三組己接近失效，表面觀察顯示三組電池已無法提供足夠電源予 UHF。
IHU將可繼續嘗試使它運作。儘管一些測試成功，但S波段傳送器的初步測試並不樂觀。若電壓可再度回升，我們仍會令衛星維持原狀，到時 435.150 發射器仍可被使用。
在未來數月(甚或數年)，指揮隊將會定期再繼續嘗試與衛星聯繫。相信其一組電池仍有恢復運作的可能性，令我們可以再次與朋友進行溝通。感謝所有曾經提供資金、協助設計、建造、發射和運作AO- 51的朋友。運作了7年，已是一個非凡的成就！
歡迎以金錢和時間來支持 AMSAT 的 Fox-1 項目及其他AMSAT的全球項目。
AMSAT Announces End of OSCAR 51 Mission (From ARRL)
AMSAT-OSCAR 51 -- the popular FM repeater satellite -- has likely reached the end of its operational lifespan. AMSAT-NA Vice President of Operations Drew Glasbrenner, KO4MA, issued the following statement on November 29: "It is with a heavy heart I report that AO-51 has ceased transmission and is not responding to commands. The last telemetry data indicated that the third of six batteries was approaching failure to short, and observations indicate the voltage from three cells is insufficient to power the UHF transmitters. The IHU may continue to be operative. Initial tests with the S band transmitter were also not positive, although more attempts are in order. We have tried leaving the satellite in an expected state where if voltages climb high enough, the 435.150 transmitter may possibly be heard. The command team will regularly attempt communications with the satellite over the coming months (and years). There is always the possibility that a cell will open and we could once again talk to our friend while illuminated. Thanks to all who helped fund, design, build, launch, command, and operate AO-51. Its 7 year mission has been extraordinary."
