[amsat-bb] Re: FO-29 Operation

WILLIAMS MICHAEL k9qho6762 at sbcglobal.net
Mon Sep 28 05:30:21 PDT 2009

This is probably the most important email about FO-29. I've high lighted and underlined the most important parts of the message. I looks like FO-29 will not be in full operation until the first part of 2010. At this moment it is only commanded on over Japan as noted in the schedule.  With the issue of the batteries, it seems JAMSAT would consider similiar operations as it is now doing when FO-29 enters long periods of darkness in the future. This would possibly allow a  longer life for this great bird.
Thanks to JE9PEL for this important infornation.
Mike (K9QHO)
AMSAT 33589
--- On Wed, 9/9/09, WILLIAMS MICHAEL <k9qho6762 at sbcglobal.net> wrote:

From: WILLIAMS MICHAEL <k9qho6762 at sbcglobal.net>
Subject: FO-29
Date: Wednesday, September 9, 2009, 11:06 PM

Start of FO-29 article:-----------------------------------------------------
FO-29 status in 2009

FO-29 launched in August 1996 and has been working 14 years.

FO-29 is planning to operate the consecutive use with the analog 
transponder until the end of August 2009, but it was confirmed that a 
transponder stopped on August 25.

In the later pass, the transponder operation is confirmed when we sent a 
command of transponder ON from the control station, but we stopped 
transponder temporarily now.

We had the a similar symptom of stopping the transponder in the spring 
of 2007 .

FO-29 is in the "high shade rate period" now.
Both of the transponder stop in the spring of 2007 and this time are 
thought that by this "high shade rate" and by the rise of the internal 
resistance of the deterioration of the battery and by the influence of 
the temperature of the battery.

The power control system FO-29 (PCU) watches a terminal voltage of the 
battery and turns off the power supply of the transmitter automatically 
if it becomes less than the setting voltage. In addition, When FO-29 
enters the sunshine area and it recovers to the setting voltage by sun 
battery power, it is designed to turn on a transmitter automatically.
However malfunction occurred for this function in 2007.

Because of transmitter was not turned on automatically, We made an 
operation schedule plan from the summer of 2007 and managed 1-2 times on 
in a day.
This management operation worked well. The electricity income and 
expenditure restored or it was cured spontaneously.The transponder has 
been worked without control command from control station from summer of 

The power supply circumstances of current FO-29 is almost same situation 
as stop period spring of 2007, scheduled operation period, the 
consecutively operative period from the summer of 2008 and it is in a 
"high shade rate". This transponder off is supposed to be a similar 
situation as when transponder stopped in the spring of 2007.

***From this , We decided that we make the operation schedule plan, and 
manage the limit of the operative number of times in one day like last 
time to keep the electricity income and expenditure untill improve the 
"shade rate" which is in January, 2010.

Thanks control team

JA1COU Yutaka Murata

Message: 7
Date: Tue, 08 Sep 2009 20:25:03 +0900
From: Mineo Wakita <ei7m-wkt at asahi-net.or.jp>
Subject: [amsat-bb] FO-29 schedule Sep. and Oct.
To: amsat-bb at amsat.org
Message-ID: <10CA3077029EECei7m-wkt at asahi-net.or.jp>
Content-Type: text/plain; charset=us-ascii

FO-29 still has some trouble.
Therefore it is examination use for a while only over Japan.
We do not yet understand when it recover.
There are the reception report from South America and Europe.
You may listen to CW with luck over your area.

Control station says that you may be listen in Australia,
South America, North America, and Europe in particular.

Control station says more as follows.
The transmitter becomes OFF by UVC automatically in the eclipse.
The station confirmed the moment when the transmitter became OFF
please inform it of the date and time at the following address.

lab (at) jarl.or.jp

The below * is a predicted pass that command work take time.
And please consent to be a possibility that we cannot turn ON
the transponder by the state of the line.

September, UTC
11 21:37
12 12:21*, 22:26
13 11:30
14 22:23
15 None
16 12:15*, 22:20
17 None
18 12:03*, 22:15
19 11:15, 21:20
20 12:05*
21 12:55*, 22:58
22 10:10, 22:10
23 12:50
24 None
25 10:58, 22:50
26 11:50*, 21:55
27 12:36*
28 21:50
29 12:35*, 22:45
30 11:40*, 21:45

October, UTC
1 12:30*, 22:35
2 11:35, 21:45
3 12:25, 22:28
4 11:28
5 22:25
6 13:08, 21:33
7 12:10, 22:23
8 13:05, 21:35
9 None
10 11:12, 23:08
11 12:05*, 22:12
12 11:08
13 None

JE9PEL, Mineo Wakita


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