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[jamsat-bb:8644] AO-40 S2 status May 25
本日(5/25)、衛星AO-40 の LOS間際の 5/24 23:22:25UTC (衛星内部時刻) に
(5/25 08:22:25JST) 受信した、S2ビーコン「CRC VALID OK」の 1ブロックを
次に示します。観測地点から最も遠い、6万4千km の彼方の宇宙から飛んでき
たデジタル信号のデータです。
昨日(5/24)、AO-40 コマンドチームの DB2OS/Peter Guelzow 氏が、amsat-bb
で 姿勢変更と運用スケジュール変更について広報していたとおり、AO-40 の
受信データでも、ALON/ALAT は「0/-10」に、 U/L1->S2 は「MA 100-180」と
なっていました。
AO-40 S2-beacon
29ele.Loop(Maki) + PreAmp.(Maki) + Converter(Drake)
JST MHz(USB) MA RS km
08:22:25 2401.322 145 45 64070
WPSKDEC 1.2b - AMSAT-FRANCE Registred to JE9PEL
## AO-40 IHU-1 Telemetry Display - OE1KIB, OE1VKW, F1HDD, XTOPHE ##
A HI, THIS IS AMSAT OSCAR-40 2001-05-24 23:22:25 #01A4
+--------------------------------------------------------------+
| ALON/ALAT=0/-10; EXPERIMENTAL U/L1->S2, MA 100-180, AVOID MB!|
+--------------------------------------------------------------+
________________________ Orbit data ____________________________
AMSAT day 08544 Time 23:22:25.02 UTC Orbit No 00260 Phase 145
________________________ Status ________________________________
RX: U(-1.3dB Leila1) L1(0.7dB S2/Ku) L2(-0.3dB)
TX: S2(0x62W L1 Leila1 MB)
Beacons: GB(PSK;) MB(EB source; S2/Ku)
Ant/Pre-amps: V-Rx=hi V-Tx=om U-Rx=hi U-Tx=om L-hi+preamp
Experiments: RUDAK GPS B-Cam Cedex-ctrl Cedex-pwr
Main battery on; Memory soft error count: 3
________________________ Temperatures [.C] _____________________
SolPan1 -5.8 SolPan2 9.4 SolPan3 8.7 SolPan4 7.4
SolPan5 7.4 SolPan6 -3.8
BCR1 8.1 BCR2 14.7 BCR3 11.4
MainBatB2 8.7 MainBatB4 97.7 MainBatB6 -5.8
AuxBatB1 12.7 AuxBatB5 16.6
V-TX 13.3 U-Excit 11.4 U-Amp 11.4 S1-TX 19.3
S2-TX 21.2 X-TX 85.6 X-TX TWT 87.3
U&V-RX 19.3 L1-RX 19.3 L2-RX 19.3 S1-HF RX 10.7
S2-C RX 11.4 IHU 4.1 SEU 1.5 EPU 12.7
HP1+X-Y 11.4 HP2+X+Y 12.7 HP2+X-Y 14.0 HP2-X 97.7
HP3+X 17.3 HP3-X 17.9 HP4+X+Y 19.9
NH3 B2 10.7 MMH B3 12.7 N2O4-X-Y 97.7 N2O4+X+Y 19.9
He Tank 97.7
Top 97.7 Bottom 97.7 Back 97.7 Side2Pan 12.0
Side4Pan 10.0 S ant 18.6
________________________ Voltages [V] __________________________
Main-Bat 28.9 Aux-Bat 19.7
BCR1-In 25.6 BCR2-In 21.2 BCR3-In 10.5
28V Bus 28.7 10V-C1BCR2 10.5 10V-C2BCR3 10.6
________________________ Currents [mA] _________________________
SP1-BCR1 16224 SP4-BCR2 16224 SP2-BCR3 16224
SP6-BCR1 16123 SP5-BCR2 16224 SP3-BCR3 16224
10V-C1BCR2 2013 10V-C2BCR3 2013 28V-SSEU 0xa9
28V-Bat 50 28VU1EPU -1 28VU2Bus 2807
28VU3-S 517 28V-BCR 2624
28VS-PA/M 5845 10VS-PA/M 0xa4 X-Helix 3 K-Tx 0x9a
________________________ Sun/Earth Sensors _____________________
Sensor mode: spin
SS1 PLL: locked SS2 count: 30 SpinRate[rpm] 5.2
SS Z-25 -25. SS Y-25 -25. SS Up-X 4. SS Up-Y 4.
SS Z-45 -44. SS Y-45 -44. SS Dwn-X 4. SS Dwn-Y 4.
###### AO-40 IHU-1 Telemetry Display --- End of A/E Block ######
CRC VALID : 4b5
> Date: Thu, 24 May 2001 09:40:50 +0000
> From: Peter Guelzow <peter.guelzow@arcormail.de>
> To: amsat-bb@amsat.org, info@amsat-dl.org, P3-D Mailing Liste
> <p3d-dev@amsat.org>
> Subject: [amsat-bb:47235] AO-40: Schedule change
>
> Dear All,
>
> In order to escape the rapidly approaching sun and get ready for our
> move to 270/0, we have lowered ALAT to approximately -11 degs.
>
> ALON is currently estimated at 3 degs.
>
> These values will be tweaked with YACE images shortly (Orbit 259,
> download starting at about 0600 UTC on 5/24).
>
> We will continue to lower ALAT to about -25 degs, before beginning
> to move ALON past the sun.
>
> The result of all this is that there is no reason to continue the
> X-Tx, K-Tx, or C-Rx testing at the moment as >11 deg. minimum squint
> is not enough for useful signals. In addition, the RUDAK team has
> asked for more time for RUDAK.
>
> Accordingly, the schedule will be modified to stop the K-Tx, X-Tx,
> C-Rx testing and give RUDAK more uninterrupted time with a relatively
> good squint angle.
>
> The schedule for S2 downlink will be as follows:
>
> MA Mode
> ------------------------------
> 240-039 beacon only
> 040-099 RUDAK
> 100-179 L1/U passband On
> 180-239 RUDAK
>
> The S2 MiddleBeacon (MB) is continuously On.
>
> Message blocks will be updated to reflect these new and slightly
> reduced transponder times.
>
> 73s Peter DB2OS for the P3-D team
先日、144帯 または 430帯のアップリンクが 2400帯の感度抑圧に影響する、
という話題を今石さんがしていましたが、その許容限界(?)を越えると コン
バータのRF-AMP部に悪影響(破壊)を及ぼすという可能性はないでしょうか?
--------------------------------------------
Name : JE9PEL/1 脇田
Mail : je9pel@jamsat.or.jp
URL : http://www.asahi-net.or.jp/~ei7m-wkt/
QTH : Yokohama, Japan
Date : May 25, 2001
--------------------------------------------