COMPASS-1 emergency mode


● (No.596) COMPASS-1 emergency mode (2008年8月18日)
 ---------------------------------------------------

8月14日 10:15 UTC の 1ビーコンを最後に、COMPASS-1 からは no signal 状態
が続いており、世界各地で復旧作業(DTMF信号送信) が試みられていて、現在の
ところドイツ局の集約において、3回のコンタクトが確認されています。


Thursday, August 14th, 2008 by DK3WN in COMPASS-1
still in emergency mode
 - battery voltage very low (3.2V)
 - only one beacon heard

0838 UTC 28° elev pass - no signal
1015 UTC 34° elev pass - compass ff073900070300210000a300ff
1133 UTC 05° elev pass - no signal
1805 UTC 06° elev pass - no signal
1938 UTC 39° elev pass - no signal
2114 UTC 25° elev pass - no signal

Wednesday, August 13th, 2008 by DK3WN in COMPASS-1
0820 UTC 19° elev pass - no signal
0956 UTC 52° elev pass - no signal
1133 UTC 08° elev pass - no signal
1748 UTC 03° elev pass - no signal
1920 UTC 27° elev pass - no signal
2055 UTC 37° elev pass - no signal

---------------------------------------------------------------------------

Subject: [amsat-bb] COMPASS-1 in emergency mode
From: Mike Rupprecht
Date: Thu, 14 Aug 2008 16:55:46 +0200 

Hi all, we need your help !

COMPASS-1 is in emergency mode since Sunday night. The battery voltage is
very low and the satellite is rebooting every pass. The CW beacon is on in
sunlight - but only in 8 minutes interval.

We need telemetry - so much as possible. Could you help us please and
listen to COMPASS on 437.275 MHz?

Any reports are very appreciated. You can find a simple CW telemetry
decoder on my website http://www.dk3wn.info/software.shtm
(also mp3 or wav files are welcome).

Please send your reports to compass1cubesat [at] googlemail.com or
post via this list.

Thank you very much in advance - on behalf the COMPASS-team

Mike, DK3WN

---------------------------------------------------------------------------

Subject: COMPASS-1
From: Mike Rupprecht
To: Mineo Wakita
Date: Sat, 16 Aug 2008 15:27:46 +0200

Hi Mineo,

We need your help !!! COMPASS-1 is in emergency mode and we cannot hear
the beacon since 2 days. Could you help us please?

Are you able to send DTMF tones (simply from loudspeaker via microphone) ?

There is an good and free DTMF dialer to download here:
http://www.polar-electric.com/DTMF/Index.html#Encoder

Could you try this for us and send the following code please: ****14#164#

Cf.
****14#200#   heater off to -55 degr
THIS IS THE VERY IMPORTANT COMMAND

****13#200#   heater on to -55 degr
****16#170#   critical batt threshold to 3.3V 
****15#255#   low batt threshold to max -> charge batteries

The commands consist of 4 stars, two numbers, a hash, 3 numbers, and a hash.

This commando should switch the internal heater off. I think that's the only
way to save power. If COMPASS receive this sequence successfully you can
hear a short confirmation beep.

Uplink:   145.*** MHz FM
Downlink: 437.275 MHz CW

If you have any questions, please ask me. Thank you very much in advance !!!

73, Mike
DK3WN

---------------------------------------------------------------------------

回路というほどのものではありませんが、COMPASS-1 復旧用の
DTMF信号送信ケーブルを作成しました。(常時送信状態を実現)
本日(8/17)夜のパスで実験してみます。
※ dtmf.exe を使って、DTMF wav 音声ファイルを事前に作成。 Tnx>JA0CAW
http://homepage2.nifty.com/plasma/program/dtmf_dec.html





Subject: COMPASS-1 DTMF status
From: Mike Rupprecht
To: Mineo Wakita
Date: Sun, 17 Aug 2008 20:09:45 +0200

Hi Mineo,

thank you very much for your effort. We now have 3 successfullycontacts.
Always during a long period in full sunlight.

73, Mike

-----Ursprungliche Nachricht-----
Von: Mineo Wakita
Gesendet: Sonntag, 17. August 2008 15:40
An: mike rupprecht
Betreff: COMPASS-1 DTMF status

Hello Mike,

I made DTMF wav file and DTMF uplink cable.
I had tried to uplink many a time, but we could not hear any signal
from COMPASS-1.
We will try again it.

JE9PEL, Mineo Wakita

---------------------------------------------------------------------------

Compass-1 recovery efforts

COMPASS-1 にコマンドが通ったというニュースが駆け巡っています。
8/18夜20:07JST のパスで確認してみます。(日照時のことらしい.)


COMPASS is in emergency mode and the beacon is transmitting every 8..9
minutes if the voltage is higher than 2.8 volts. The RX/TX seems to work
with voltages down to 2.4 volt. This explains why COMPASS responds to
commands but no beacon sends.

If the batteries are charged and the voltage is higher than 3.7 volts (!)
COMPASS will switch autonomous into NORMAL mode. Only in this mode the FM
transmitter (437.405MHz) is on and the satellite can send packets on request.


COMPASS は現在、緊急モードにあり、電圧が 2.8ボルト以上であればビーコンは
8-9分ごとに送信されている。RX/TX は現在、2.4ボルトまで下がっているようだ。
このことは、なぜ COMPASS がコマンドに反応しているのに ビーコンが送信され
ないのか、という説明になっている。

もしバッテリーが好転し電圧が 3.7ボルト以上あれば、COMPASS は自動的に正常
モードになるだろう。このモードの時にのみ FM送機(437.405MHz) は on になり、
衛星は要求どおりパケットを送信することができる。

---------------------------------------------------------------------------

Subject: [amsat-bb] Re: COMPASS-1 beacon heard
From: Mike Rupprecht
Date: Fri, 22 Aug 2008 12:00:19 +0200

Hi all,

A replay of the previous pass!
All commands sent and acknowledged at 0939 UTC.

Beacon received at 0943 UTC: 00 compass ff0740150600002100009000ff

Solar Cell Voltage     5.00 V
Solar Panel 6 Cur      43.92 mA
Solar Panel 2 Cur      0.00 mA
Solar Panel 3 Cur      37.65 mA
Solar Panel 4 Cur      131.76 mA
Solar Panel 5 Cur      401.57 mA
EPS Reset Counter      0 
Power Level            Critical Battery Capacity 
Heater Active          Battery Heater ON 
Power Safe Counter     0 
Emergency Mode Counter 0 
Battery Voltage        2.82 V
Battery Current        0.00 mA
Battery Temperature    -1 °C

Heater still on - I think there is no internal communication between
the units (I2C bus down).
Mhh, I haven't got a clue.

73, Mike
DK3WN

---------------------------------------------------------------------------

COMPASS-1 CW beacon

9月8日夜21時51分JST のパスで CW beacon を受信してみました。復活を予感さ
せるほど明瞭な了解度でした。解析してみるとバッテリー電圧が 3.80V もあり、
バッテリーヒーターも OFF になっていました。




08.09.2008 12:53UTC    90002900065900202907c20004
---------------------------------------------------
Solar Cell Voltage     2.82 V
Solar Panel 1 Cur      0.00 mA
Solar Panel 2 Cur      257.25 mA
Solar Panel 3 Cur      0.00 mA
Solar Panel 4 Cur      37.65 mA
Solar Panel 5 Cur      558.43 mA
EPS Reset Counter      0
Power Level            Critical Battery Capacity
Heater Active          Battery Heater OFF
Power Safe Counter     41
Emergency Mode Counter 7
Battery Voltage        3.80 V
Battery Current        0.00 mA
Battery Temperature    4 C
---------------------------------------------------

http://www.ne.jp/asahi/hamradio/je9pel/80908cmp.wav



COMPASS-1 一周年記念

DO-64 (DELFI-C3), CO-65 (CUTE1.7+APDII), CO-66 (SEEDS-II), AAUSAT-II,
COMPASS-1 が昨年(2008年4月28日) 打ち上げられてから明日でちょうど一年
になります。それを記念して、COMPASS-1 はコマンドがオープンされました。
次の広報では、二日間だけのイベントのようです。なお、DTMFトーンの作成
には、DTMF Encoder (Ver1.2)、 DTMF Dial Tone Generator (Ver1.0) など
のソフトが使いやすいかと思います。

Subject: [amsat-bb] Happy Birthday COMPASS-1
From: Mike Rupprecht
Date: Sun, 26 Apr 2009 15:52:17 +0200 

All,
in two days we will celebrate the first anniversary of COMPASS-1.

We are happy to announce three DTMF commands to the whole community
in order to say THANK YOU.

Uplink frequency: 145.980 MHz FM, DTMF tones

These are as follows:

**35##  - request a test beacon CW
**36##  - request a test packet 1k2 AFSK FM (UI-Frame)
**60##  - request a housekeeping frame in 1k2 AFSK FM (KISS frame)

Every command will be confirmed with a short "beep" on the CW frequency.

* frequency for CW beacon is    437.275 MHz
* frequency for packet radio is 437.405 MHz

See here for COMPASS decoding software,
http://www.dk3wn.info/software.shtml

We'd be happy if you send us your received data to
compass1cubesat@googlemail.com
If you have any questions please don't hesitate to ask us.

Have much fun, 73 and thank you !

Kevin, DG9KK
Mike,  DK3WN

(参考)
http://www.raumfahrt.fh-aachen.de/news.htm
http://ja0caw-je0mzi.mo-blog.jp/syumi/2009/04/compass1_51e9.html


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