[jamsat-bb:4952] Re: LO-19 CW telemetry

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[jamsat-bb:4952] Re: LO-19 CW telemetry

To: jamsat-bb@jamsat.or.jp
From: "M. Wakita" <je9pel@jamsat.or.jp>
Date: Sat, 15 Jan 2000 16:20:57 +0900
Reply-To: jamsat-bb@jamsat.or.jp

　衛星LO-19のCWテレメトリ運用再開の情報が、JH4DHX/3 大谷氏により
　報告されました。[jamsat-bb:4949, Jan 15, 2000]　本日(Jan 15)、
　10:42JST～10:57JST(01:42～01:57UTC) のパスで、当局 JE9PEL/1 に
　おいてもCWテレメトリの送信を再確認しました。  (Tnx.JH4DHX/3)

　大谷氏の報告のとおり、ゆっくりしたCWビーコンを１分間隔で送信し
　ていて、1フレームは3桁の略数字(下記資料(3)参照)の8個のデータで
　構成されていました。　437.125MHz  1200bps  CW_mode  に設定して
　 dxterm.exe を用いて受信しましたが、ドップラー偏移により周波数
　は +/-10kHzほど変化し 、デコードもシビアなので、受信には繊細な
　チューニングが要求されます。

　次に受信データを抜粋します。各１行目が実際の受信データ、２行目
　は下記資料(3)によりそれを数値に置き換えたものです。


  E LUSAT HI HI 40 AUN ABB AV6 ADT AUN AED AET AE6
  5 LUSAT HI HI 40 129 177 136 180 129 158 150 156

  E LUSAT HI HI 40 AUN ABE AV6 ABN AUN AEB A44 AE6
  5 LUSAT HI HI 40 129 175 136 179 129 157 144 156

  E LUSAT HI HI 40 AUN AB4 AVE ABD AUN AEB A44 AE6
  5 LUSAT HI HI 40 129 174 135 178 129 157 144 156


　では次に下記資料をもとに、この１行目のデータを解析してみます。
　同様に解析していくと、+10バッテリ電圧(CH2)・出力電力(CH4)・
　 +Zパネル電圧(CH7)の値が、減少傾向にあることがわかります。

  CH 1: +5 voltage             636/129=4.9              Volts
  CH 2: +10 battery voltage    0.064*177=11.3           Volts
  CH 3: CW transmitter temp    0.354*(134.7-136)=-0.5   Deg.C
  CH 4: Output power TX        ((10.9+180)^2)/40.1=909  mW
  CH 5: Box temperature #4     0.356*(136-129)=2.5      Deg.C
  CH 6: +10 v current          0.7*158=111              mA
  CH 7: +Z voltage panel       0.15*150=22.5            Volts
  CH 8: +8.5 voltage           0.056*156=8.8            Volts


  ----- [資料(1)] -----
> Date: 24 Dec 1999 12:09:36 EDT
> Subject: [jamsat-amsat-bb:27582] LUSAT CHANGED
> From: gustavoc@bbs.pinos.com
> To: amsat-bb@amsat.org
> 
> Lusat have changed to CW beacon at 437.125 MHz, so PSK downlink it 's at
> 437.150 MHz. The CW beacon is sending eight telemetry channels and one
> status channel.
> The format is:
> 
> LUSAT HI HI VL N1 N2 N3 N4 N5 N6 N7 N8.
> 
> V is the EPROM's program version from 1 to 8.
> L is the ram micro test. L=O, (okey) L=E, (error).
> 
> Remember that numeric value are in compact codification.
> Reports are wellcome.
> Merry X-Mas and HAPPY NEW YEAR from AMSAT-LU
> Gustavo Carpignano, LW2DTZ


  ----- [資料(2)] -----
> Date: Sat, 25 Dec 1999 18:08:18 +0100
> Subject: [jamsat-amsat-bb:27597] LUSAT Cw-Beacon
> From: "Miguel A. Menendez" <ea1bcu@amsat.org>
> To: amsat-bb@amsat.org
> 
>                 <LUSAT CW/12ppm Telemetry 437.125 Mcs>
> 
> The Lusat sends one status channel (NL)  and 8 data channels.
> 
> LUSAT HI HI NL  N1 N2 N3 N4 N5 N6 N7 N8
> 
> NL = Status Channel:
> N   = It is the number of Eprom program version. The program is loaded 7
> times to prevent a crash, and it goes loading successive versions when error
> is detected in the active version. (N = 1,2,3,4,5,6 or 7)
> 
> L = it is the result of the RAM/6508 test, if L=O the RAM is OK, if
> the value of L=E is error in the RAM.
> 
> Ch1# =    +5 Reg Volts                 636/N1    V
> Ch2# =    +10v Battery               0.064*N2    V
> Ch3# =    CW Tx Temp          0.354(134.7-N3)    C
> Ch4# =    CW Tx Power/Out    (10.9+N4)^2/40.1   mW
> Ch5# =    Temp Box4             0.356(136-N5)    C
> Ch6# =    +10V Current                 0.7*N6   mA
> Ch7# =    +Z Volts                    0.15*N7    V
> Ch8# =    +8.5 Volts                 0.056*N8    V
> 
> 73 de Miguel, EA1BCU
> 
>   Miguel A. Menendez  // Apdo. 79  Aviles // 33400 ASTURIAS Spain.
>    E-mail: ea1bcu@amsat.org       http://www.ctv.es/USERS/ea1bcu


  ----- [資料(3)] -----
> Date: Sun, 26 Dec 1999 21:18:45 -0500 (EST)
> Subject: [jamsat-amsat-bb:27597] LUSAT Cw-Beacon
> From: John Magliacane <magliaco@email.njin.net>
> To: ans@amsat.org
> 
> SB NEWS @ AMSAT $SPC1227
> * SpaceNews 27-Dec-99 *
> BID: $SPC1227
> 			       =========
> 			       SpaceNews
> 			       =========
> 		 	MONDAY DECEMBER 27, 1999
> 
> * LUSAT-OSCAR-19 NEWS *
> =======================
> In anticipation of the 10th anniversary of the Microsat satellite launch
> on January 22, 2000, AMSAT-Argentina activated LUSAT-OSCAR-19's CW
> telemetry beacon transmitter on December 21, 1999.  PSK is now being
> transmitted by the satellite on 437.150 MHz, and CW is available on
> 437.125 MHz.  The digipeater is currently active, and the PSK beacon
> is currently transmitting the following text message:
> 
> ---------------------------------------------
> Dec 21.
> CW beacon active for some hours
> Pse send your report and get a nice QSL card.
> 73 de Nestor, LU7XAC
> ---------------------------------------------
> 
> LO-19, a 7 inch square microsat satellite, orbits 780 km above the
> earth's surface.  Solar cells and NiCad batteries aboard LO-19 are
> maintaining better than 60% efficiency after over 51,600 consecutive
> charge/discharge cycles in space.  The satellite is currently
> delivering over 1 watt of output power on both transmitters.
> 
> Controllers invite everyone to copy either the CW or PSK telemetry
> transmissions from LO-19, and submit them to AMSAT-Argentina in exchange
> for a colorful QSL card.  Reports may be sent via packet radio to:
> LU7AA@LU7AA.CF.ARG.SOAM, or via e-mail at lu7xac@amsat.org.  AMSAT-LU's
> Web site is available at: http://www.amsat-lu.org/
> 
> The morse sent by LO-19 on 437.125 MHz is abbreviated slightly to save
> transmission time and conserve on-board electrical power.  Morse is sent
> at 12 WPM, and is coded as follows:
> 
> 		0 -       T		5 .         E
> 		1 .-      A		6 -....     6
> 		2 ..-     U		7 -...      B
> 		3 ...-    V		8 -..       D
> 		4 ....-   4		9 -.        N
> 
> The beacon has one status channel and eight 3 digit data channels.  Data
> for each channel follows, and the formulas that follow provide the correct
> value.
> 
> The message format is:  LUSAT HI HI VL N1 N2 N3 N4 N5 N6 N7 N8
> VL: Version of redundant software.  N1 to N8 telemetry data of each channel.
> 
> 	CH 1: N1 +5 voltage			636/N1 Volts
> 	CH 2: N2 +10 battery voltage		0.064*n2 Volts
> 	CH 3: N3 CW transmitter temp		0.354*(134.7-N3) Deg. C
> 	CH 4: N4 Output power TX		((10.9+N)^2)/40.1 mW
> 	CH 5: N5 Box temperature #4		0.356*(136-N5) Deg. C
> 	CH 6: N6 +10 v current			0.7*N6 mA
> 	CH 7: N7 +Z voltage panel		0.15*N7 Volts
> 	CH 8: N8 +8.5 voltage			0.056*N8 Volts
> 
> LUSAT's BBS code is expected to be reloaded in mid-January 2000.
> 
> Thanks go to LUSAT's first ground control station, Nestor Pavan, LU7XAC,
> for building up a team and placing LO-19 in full operation.  Special thanks
> also go out to AMSAT-NA, AMSAT-UK, AMSAT-Brasil, and Weber College with
> whom AMSAT-Argentina has shared the Microsat's Quest during the last ten
> years.
> 
> [Info via LU7XAC and LU7AA]
> 
> -=-=-=-=-=-=-=-=-=-=-=-=- John A. Magliacane, KD2BD -=-=-=-=-=-=-=-=-=-=-=-=-
> Internet  : kd2bd@amsat.org          |  Voice : +1.732.224.2948
> Satellite : AO-16, KO-25             |  Morse : -.-  -..  ..---  -...  -..
> Packet    : KD2BD @ N2TDU.NJ.USA.NA  |  WWW   : http://www.njin.net/~magliaco/> 
> Video     : 426.250 MHz/439.250 MHz  |  FAX   : +1.732.224.2060
> -=-=-=-=-=-=-=-=-=-=-=- Linux Doesn't Cost.  It Pays. -=-=-=-=-=-=-=-=-=-=-=-


　----------------------------------------------
　Name : JE9PEL/1 脇田
　Mail : je9pel@jamsat.or.jp
　URL  : http://www.ne.jp/asahi/hamradio/je9pel/
　QTH  : Yokohama, Japan
　Date : Jan 15, 2000
　----------------------------------------------
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