衛星LO-19 CWテレメトリ解析


● (No.190) 衛星LO-19 CWテレメトリ解析 (2000年1月15日)
 -------------------------------------------------------

 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" 
> To: amsat-bb@amsat.org
> 
>                 
> 
> 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 
> 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. -=-=-=-=-=-=-=-=-=-=-=-



--------------------------------------------------------------
LO-19 CW telemetry on Jan 15, 2000  (by JE9PEL / Mineo Wakita)
--------------------------------------------------------------

I received LO-19 CW telemetry every one minute on Jan 15, 2000,
The followings are some nominal data on 01:42-01:57UTC, Jan 15.
One frame contains eight numbers data of three figures as below.

................................................
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
................................................

First line is the actual received data and second line is the 
replaced data with real number by the transformation.  And
I analyzed these data by the equations in [SpaceNews 27-Dec-99].


      0 -       T            5 .         E
      1 .-      A            6 -....     6
      2 ..-     U            7 -...      B
      3 ...-    V            8 -..       D
      4 ....-   4            9 -.        N


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


----------------------------------------------------
Freq : 437.125MHz, 1200bps, CW mode
Rig  : TS-790S (KENWOOD)       ; 144/430MHz
Antn : ZQ-81H  (RAMDA)         ; Cubical Quad 8 ele.
       WHS-32N (MASPRO)        ; Yagi 2×20 ele.
Rotr : KR400, KR500A (KENPRO)  ; Rotator
       CS232, CX500  (KENPRO)  ; Controler
Amp  : GPA-720J (ANTEN)        ; 430 PreAmp
Comp : 486DX2/66MHz (VIP)      ; DOS/V
       PC-9801nv (NEC)         ; Note type
TNC  : TNC-241, TMB-965 (TASCO); G3RUH
Soft : Satellite Tracking Program_II (KENPRO)
       DXTERM,   WinTrak V3.5
       WiSP3213; GSC      2.03 , MsgMaker  2.10a
                 View-Dir 2.00e, ProcMail  2.00g
                 MSPE     2.00f, MsgView   2.00b
                 UpdKeps  2.00c,
Name : JE9PEL/Mineo Wakita, Member of JAMSAT
QTH  : Yokohama Japan, GL:PM95TJ
       LAT 35.22'50"N, LON 139.36'52"E
Mail : je9pel@jamsat.or.jp
URL  : http://www.ne.jp/asahi/hamradio/je9pel/
Date : Jan 15, 2000
----------------------------------------------------


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