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[jamsat-bb:12007] AO-7 Technical data
今石さん、菊川さん、皆さん、
再発見された28年前の衛星AO-7のテクニカルデータとテレメトリ換算式の詳細
が、K2UBC/Davidoff Martin 氏により、AMSAT-BB上に公開されました。それを
用いて、G8ATE/Robert Turlington 氏が、受信データを解析しています。参考
のため、長文になりますがここに転載します。 (この記事の最後のURL参照)
Date: Sun, 23 Jun 2002 14:16:09 -0400
From: "Davidoff, Martin", K2UBC
To: "AMSAT-BB@amsat.org"
Subject: AO 7 Technical data
AMSAT-OSCAR 7
Beacons
29.502 MHz (200 mw) Used in conjunction with Mode A
145.972 MHz (200 mw) Used in conjunction with Mode B and C
[low power Mode B]
435.100 MHz (intermittent problem -- switches between 400 mw and 10mw)
2304.1 MHz (40 mw) Must be commanded on. Auto off after 15 minutes.
Requires STA to operate.
Transponder I: Mode A (2m/10m)
type: linear, non-inverting
uplink passband: 145.850 - 145.950 MHz
downlink passband: 29.400 - 29.500 MHz
translation equation:
downlink (MHz) = uplink (MHz) - 116.450 MHz +/- Doppler
output power: 1.3 watts PEP (start of life)
Transponder II: Mode B (70cm/2m) and Mode C (low power)
type; linear, inverting
uplink passband: 432.125 - 432.175 MHz *See Note
downlink passband: 145.975 - 145.925 MHz
translation equation:
downlink (MHz) = 578.100 - uplink (MHz) +/- Doppler
output power: 8 watts PEP Mode B(start of life!), 2.5 watts PEP Mode C
*Note: Due to changes in Radio Amateur Service and Radio
Amateur Satellite Service there are questions as to
legality of US Amateurs transmitting to AO-7 on this frequency.
Date: Sun, 23 Jun 2002 13:27:03 -0400
From: "Davidoff, Martin", K2UBC
To: "Amsat-BB@amsat.org"
Subject: OSCAR 7 Telemetry decoding info
AMSAT BB Readers may be interested in the decoding equations which
follow. [Please post any updates or corrections]
Also,
IF 1. Speculation that long term chemical changes in one
or more battery cells have led to increased cell
resistance enabling the spacecraft to operate while
in sunlight are correct and
2. Reports indicating that beacons, telemetry systems,
and possibly transponders are operating
THEN The prognosis for long term spacecraft operation are excellent.
If any of the old command stations are reading this I suggest that
they step in and test the command system!
Finally, the orbit is very circular and very stable but some good
orbital elements would help.
CHNL Parameter Measurement Range Calibration Equation
---- --------- ----------------- --------------------
1A Total Solar Array Current 0 to 3000 ma I = 29.5 N (ma)
1B +X Solar Panel Current 0 to 2000 ma I = 1970 - 20N (ma)
1C -X Solar Panel Current 0 to 2000 ma I = 1970 - 20N (ma)
1D +Y Solar Panel Current 0 to 2000 ma I = 1970 - 20N (ma)
2A -Y Solar Panel Current 0 to 2000 ma I = 1970 - 20N (ma)
2B RF Power Out 70cm/2m 0 to 8 watts P = 8(1-0.01N)^2 (watts)
2C 24 Hour Clock Time 0 to 1440 min. t = 15.16N (min)
2D Battery Charge/Discharge -2000 to 2000 ma I = 40(N - 50) (ma)
3A Battery Voltage 6.4 to 16.4 V V = 0.1N + 6.4 (volts)
3B Half-Battery Voltage 0 to 10 V V = 0.10N (volts)
3C Bat. Chg. Reg. #1 0 to 15 V V = 0.15N (volts)
3D Battery Temperature -30 to +50 deg. C T = 95.8 - 1.48N (deg.C)
4A Baseplate Temperature -30 to +50 deg. C T = 95.8 - 1.48N (deg.C)
4B PA Temp. 2m/10m -30 to +50 deg. C T = 95.8 - 1.48N (deg.C)
4C +X Facet Temp. -30 to +50 deg. C T = 95.8 - 1.48N (deg.C)
4D +Z Facet Temp. -30 to +50 deg. C T = 95.8 - 1.48N (deg.C)
5A PA Temp. 70cm/2m -30 to +50 deg. C T = 95.8 - 1.48N (deg.C)
5B PA Emit. Current 2m/10m 0 to 1167 ma I = 11.67N (ma)
5C Module Temp. 70cm/2m -30 to +50 deg. C T = 95.8 - 1.48N (deg.C)
5D Instrument Sw. Regulator
Input Current 0 to 93 ma I = 11 + 0.82N (ma)
6A RF Power Out 2m/10m 0 to 10,000 mw P = (N^2)/1.56 (mw)
6B RF Power Out 70 cm 0 to 1,000 mw P = 0.1(N^2) + 35 (mw)
6C RF Power Out 13 cm 0 to 100 mw P = 0.041(N^2) (mw)
6D Midrange Telemetry Calib. 0.500 V V = 0.01N(0.50 +/- 0.01) (V)
Date: Sun, 23 Jun 2002 18:14:13 -0400
From: Gilbert Mackall gmackall, N3RZN
To: Robert Turlington, G8ATE
Cc: amsat-bb@amsat.org
Subject: Re: AO7 telemetry today
Here is a decode:
1A: Total Solar Array Cur 0.00 ma
1B: +X Solar Panel Cur 430.00 ma
1C: -X Solar Panel Cur 390.00 ma
1D: +Y Solar Panel Cur 1030.00 ma
2A: -Y Solar Panel Cur 1810.00 ma
2B: RF Pwr. out 70/2 0.77 watts
2C: 24-Hr Clock Time 30.32 min
2D: Batt Chg/Dischg Cur 160.00 ma
3A: Battery Voltage 13.90 volts
3B: High-Batt Voltae 6.40 volts
3C: Bat. Chg. Reg. #1 4.65 volts
3D: Battery Temp. 15.88 c
4A: Baseplate Temp. 30.68 c
4B: PA emp. -2/10 Rptr 14.40 c
4C: +X Facet Temp. 23.28 c
4D: +Z Facet Temp. 17.36 c
5A: PA emp. -70/2 Rptr 35.12 c
5B: PA Emit. Cur. 2/10 11.67 ma
5C: Modul Temp 70/2 18.84 c
5D: Instr SW. reg. Input Cur. 34.78 ma
6A: RF Pwr out-2/10 0.00 mw
6B: RF Pwr Out-435 35.10 mw
6C: RF Pwr Out-2304 0.04 mw
6D: Midrange TLM Calibration 0.51 v
1A: Total Solar Array Cur 0.00 ma
1B: +X Solar Panel Cur 290.00 ma
1C: -X Solar Panel Cur 150.00 ma
1D: +Y Solar Panel Cur 610.00 ma
2A: -Y Solar Panel Cur 1170.00 ma
2B: RF Pwr. out 70/2 6.48 watts
2C: 24-Hr Clock Time 1000.56 min
2D: Batt Chg/Dischg Cur -1880.00 ma
3A: Battery Voltage 6.60 volts
3B: High-Batt Voltae 0.20 volts
3C: Bat. Chg. Reg. #1 3.30 volts
3D: Battery Temp. 17.36 c
4A: Baseplate Temp. 91.36 c
4B: PA emp. -2/10 Rptr 41.04 c
4C: +X Facet Temp. -41.84 c
4D: +Z Facet Temp. 4.04 c
5A: PA emp. -70/2 Rptr -3.36 c
5B: PA Emit. Cur. 2/10 81.69 ma
5C: Modul Temp 70/2 7.00 c
5D: Instr SW. reg. Input Cur. 61.02 ma
6A: RF Pwr out-2/10 830.77 mw
6B: RF Pwr Out-435 612.60 mw
6C: RF Pwr Out-2304 13.28 mw
6D: Midrange TLM Calibration 0.62 v
1A: Total Solar Array Cur 0.00 ma
1B: +X Solar Panel Cur 750.00 ma
1C: -X Solar Panel Cur 150.00 ma
1D: +Y Solar Panel Cur 830.00 ma
2A: -Y Solar Panel Cur 1870.00 ma
2B: RF Pwr. out 70/2 1.34 watts
2C: 24-Hr Clock Time 591.24 min
2D: Batt Chg/Dischg Cur -1200.00 ma
3A: Battery Voltage 12.70 volts
3B: High-Batt Voltae 5.30 volts
3C: Bat. Chg. Reg. #1 3.90 volts
3D: Battery Temp. 17.36 c
4A: Baseplate Temp. 51.40 c
4B: PA emp. -2/10 Rptr 94.32 c
4C: +X Facet Temp. 21.80 c
4D: +Z Facet Temp. 17.36 c
5A: PA emp. -70/2 Rptr 26.24 c
5B: PA Emit. Cur. 2/10 0.00 ma
5C: Modul Temp 70/2 20.32 c
5D: Instr SW. reg. Input Cur. 33.14 ma
6A: RF Pwr out-2/10 2.56 mw
6B: RF Pwr Out-435 35.00 mw
6C: RF Pwr Out-2304 0.04 mw
6D: Midrange TLM Calibration 0.51 v
1A: Total Solar Array Cur 0.00 ma
1B: +X Solar Panel Cur 1410.00 ma
1C: -X Solar Panel Cur 170.00 ma
1D: +Y Solar Panel Cur 510.00 ma
2A: -Y Solar Panel Cur 1190.00 ma
2B: RF Pwr. out 70/2 1.10 watts
2C: 24-Hr Clock Time 15.16 min
2D: Batt Chg/Dischg Cur 160.00 ma
3A: Battery Voltage 13.30 volts
3B: High-Batt Voltae 2.70 volts
3C: Bat. Chg. Reg. #1 3.75 volts
3D: Battery Temp. 15.88 c
4A: Baseplate Temp. 24.76 c
4B: PA emp. -2/10 Rptr 14.40 c
4C: +X Facet Temp. 20.32 c
4D: +Z Facet Temp. 17.36 c
5A: PA emp. -70/2 Rptr 26.24 c
5B: PA Emit. Cur. 2/10 11.67 ma
5C: Modul Temp 70/2 18.84 c
5D: Instr SW. reg. Input Cur. 33.96 ma
6A: RF Pwr out-2/10 0.00 mw
6B: RF Pwr Out-435 35.10 mw
6C: RF Pwr Out-2304 0.00 mw
6D: Midrange TLM Calibration 0.50 v
On Sunday, June 23, 2002, at 12:15 PM, Robert Turlington wrote:
> Hi all
> took the following Oscar7 CW telemetry on the 2mtr downlink today at
> about 1535 utc using Hamscope. I also managed momentarilr to hear my
> own downlink before taking the Tlm
>
> hi hi
> 100 177 179 147
> 208 269 202 254
> 375 364 331 354
> 444 455 449 453
> 541 501 552 529
> 600 601 601 651
> hi hi
> 100 184 191 168
> 240 210 266 203
> 302 302 322 353
> 403 437 493 462
> 567 507 560 561
> 636 676 618 662
> hi hi
> 100 161 191 157
> 205 259 239 220
> 363 353 326 353
> 430 401 450 453
> 547 500 551 527
> 602 600 601 651
> hi hi
> 100 128 190 173
> 239 263 201 254
> 369 327 325 354
> 448 455 451 453
> 547 501 552 528
> 600 601 600 650
《参照URL》
http://www.amsat.org/amsat/ftpsoft.html#ss
http://www.amsat.org/amsat/ftp/software/spreadsheet/AO7tlmSS.zip
-------------------------------------------
Name: JE9PEL/1 脇田
Mail: ei7m-wkt@asahi-net.or.jp
URL : http://www.asahi-net.or.jp/~ei7m-wkt/
QTH : Yokohama, Japan
Date: Jun 24, 2002
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