|
850 Sligo Ave. Suite 600 Silver Spring, MD 20910 1-888-322-6728 |
| Satellite Detail - Fuji-OSCAR 29 |
|
|
|
Current Keplerian ElementsFO-29 1 24278U 96046B 10038.61528290 -.00000066 00000-0 -34004-4 0 2401 2 24278 98.5211 245.6073 0351396 99.9677 264.1300 13.52947164665580
| Weekly Satellite ReportFO-29 update from JARL via Mineo Wakita, JE9PELJARL says: The eclipse rate of FO-29 suddenly changes from January to February, but it seems that the possibility of consecutive operation is low, because the malfunction occurs in the battery control circuit. But we make a temporary operative plan and operate it, because there is the possibility of the spontaneous cure to be before approximately 2 years. When the surplus occurred for the electricity income and expenditure, we review an operative plan and do it. It is operated until time to be OFF by UVC after a transmitter turned ON on the following date and time. Jan. UTC 16 21:00- 22 22:33- 24 10:35- 29 21:25- 31 09:30- Feb. UTC 5 22:00- 7 10:00- 11 11:40- 12 20:53- 14 10:40- It does not limit the use of the analog system transponder, but please do uplink with the reasonable power. We may cancel the use of the next day depending on the situation of the examination use. JARL report about FO-29 (Fuji-3) power status Translated by Mineo Wakita, JE9PEL 7 Aug 2007 The internal impedance of the battery in FO-29 (Fuji-3) is now rising extremely due to the deterioration caused by almost 12 years in orbit.. According to the telemetry data a 25 minute eclipse duration is estimated as a limit as for the analog battery system use. Because the eclipse length of FO-29 (Fuji-3) is currently about 30% or almost 32 minutes, the power supply of the relay with the battery cannot serve a period of the eclipse. A malfunction also occurs in part of the electricity control system. The malfunction is the UVC which is an automatic function for electricity management. When the satellite is in the eclipse, and the light of the sun is not the solar battery, the transmitter is turned OFF by the UVC. It is designed so that later an analog system transmitter becomes ON automatically when the terminal voltages of the battery exceed a set value after the power is available from the solar battery. However, it appears likely that a malfunction occurs for this function, and the terminal voltage cannot turn on a transmitter even if it exceeds the set value unless commanded from the ground. The length of eclipses for FO-29 (Fuji-3) will rise in future and rises to 34% in March 2008 and comes over a peak of the eclipse duration. When it goes over this peak, the eclipses will decrease slowly, and drop to 20% in August 2009. By February 2010 it is all sunshine with no eclipses for about 8 months. It seems that we can apply the analog system relay consecutively for this period. ----- Please send reception reports to lab2 'at' jarl.or.jp. Please use the subject line: 'FO-29 reception report'. Mineo, JE9PEL, has an FO-29 satellite telemetry analysis program that will automatically analyze all digital telemetry from the satellite (such as current, voltage and temperature). FO29CWTE is available at: http://www.ne.jp/asahi/hamradio/je9pel/ Detailed DescriptionFO-29 carrys a 100KHz wide SSB/CW linear transponder that operates in mode V/U. It additionally carries a 1k2/9k6 digital BBS that is no longer operational and a Digitalker beacon that transmits a digital voice on FM. Orbit
Launch
Mission subsystem (communication subsystem)JAS-2 operates in mode J, that is, 145MHz band for uplink and 435MHz band for downlink.
Bus subsystem
Reference Documents:
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Copyright©The Radio Amateur Satellite Corporation 2004
,2009 - All Rights Reserved Report a bug on this page |