● (No.269) AO-40 姿勢変更 (2001年 5月25日) ------------------------------------------ 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
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