Am 30. Juni 2003, 1415 UTC startete eine zweistufige Rockot-Rakete vom Plesetsk-Raumfahrtzentrum mit neun Satelliten. Neben einem russischen, einem tschechischen und einem kanadischen MicroSat, waren 6 weitere Satelliten einer neuen und preiswerten Bauart, sogenannte CubeSat’s an Bord. Die “Würfel-Satelliten” haben eine Kantenlänge von 10 cm und werden als NanoSat’s klassifiziert. Alle CubeSat’s tragen auch eine Amateurfunk-Nutzlast (Bake).
Der Name von ISSL’s CubeSat ist “XI” ([ sai ] X-Faktor, Forscher). Abgeleitet von seiner quadratischen Form (XI bedeudet Domino auf japanisch) stellt er den nachforschenden Geist in Richtung zur Neuerkenntnis und zur Technologie dar.
Downlink
437,490 MHz FM FSK AX.25, 1k2, 800mW
436,8475 MHz CW 50wpm, 100mW
Call
JQ1YCW
Status
ACTIVE
Orbital Parameter
NORAD 27848 COSPAR designator 2003-031-J Inclination 98.709 RA of A. Node 278.562 Eccentricity 0.0009094 Argument of Perigee 350.475 Revs per day 14.21244834 Period 1h 41m 19s (101.32 min) Semi-major axis 7 199 km Perigee x Apogee 815 x 828 km BStar (drag term) 0.000179190 1/ER Mean anomaly 163.004
Telemetrie
Status Information
Address bytes format conversion explanation
0 6 AST 'XIC01F'(Header)
6 6 AHX y = x Time[sec]
12 1 AST 'V'
13 2 AHX y = x / 255 * 4.77 Battery Voltage[V]
15 2 AHX y = x / 255 * 4.77 Solar Cell Voltage[V]
17 1 AST 'I'
18 2 AHX y = x / 255 * 4.77 * 100 Charge Battery Current[mA]
20 2 AHX y = x * 3.92 Communication System Consumption Current[mA]
22 1 AST 'S'
23 2 AHX (*1) Solar[0]
25 2 AHX (*1) Solar[1]
27 2 AHX (*1) Solar[2]
29 2 AHX (*1) Solar[3]
31 2 AHX (*1) Solar[4]
33 2 AHX (*1) Solar[5]
35 1 AST 'T'
36 2 AHX y = ( x + 298.43 ) / 149.66 * 105.25 - 287.12 +X Panel Temperature[degrees centigrade]
38 2 AHX y = ( x + 298.36 ) / 149.82 * 105.82 - 287.89 -X Panel Temperature
40 2 AHX y = ( x + 296.79 ) / 149.13 * 104.96 - 287.44 +Y Panel Temperature
42 2 AHX y = ( x + 297.80 ) / 149.51 * 106.16 - 288.55 -Y Panel Temperature
44 2 AHX y = ( x + 298.51 ) / 149.75 * 104.55 - 285.08 +Z Panel Temperature
46 2 AHX y = ( x + 297.81 ) / 149.55 * 106.57 - 289.76 -Z Panel Temperature
48 2 AHX y = ( x + 297.06 ) / 149.31 * 105.86 - 287.71 Transmitter Temperature
50 2 AHX y = ( x + 299.60 ) / 150.17 * 106.91 - 290.31 Battery Temperature
52 1 AST ' '(Space)
53 2 BIT (*2) Status 1
55 2 BIT (*2) Status 2
57 2 BIT (*2) Status 3
AST: ASCII STRING AHX: ASCII HEXADECIMAL BIT: BIT STRING
Solar Cell Current[mA] s[i] = solarI[i] / 255 * 4.77 * 10 (i=0-5)
+X Panel 10.49881 * s[0]
-Y Panel 8.251522329 * s[1] - 0.482939447 * s[2] - 0.024941879 * s[3] - 0.636795098 * s[4]
+Y Panel -0.482939447 * s[1] + 6.672955921 * s[2] - 0.017974511 * s[3] - 1.050451843 * s[4]
-Y Panel -0.024941879 * s[1] - 0.017974511 * s[2] + 9.840646080 * s[3] - 0.023700861 * s[4]
+Z Panel -0.636795098 * s[1] - 1.050451843 * s[2] - 0.023700861 * s[3] + 8.464182598 * s[4]
-Z Panel 7.515946019 * s[5]
Status
------
bit7(upper bits) -> bit0(Lower bits)
Status1 0: Telemetry ROM Mode (0:detail 1:rough)
1-7: Camera ROM Overwrite Flag (0:permit 1:prohibit) Prohibit Overwriting after takeing a image
Status2 0-4: Uplink Counter
5-7: Camera Counter
Status3 0-2: Communication System SEL(Single Event Latch Up) Reset Counter
3: Antenna Deploy (0:Before Deploy 1:After Deploy)
4-5: CW Duty Ratio (0:0 1:Under 0.3 2:0.3 3:Over 0.3) Default is 0.3
6: Cause of Reset (0:Normal 1:WDT(Watch Dog Timer) Reset)
7: State of Charge (0:Rapid Charging 1:trickle charging)
CW Beacon Format
[UT1 WWW.SPACE.T.U-TOKYO.AC.JP URL of ISSL.
[UT2 AA BB CC] Time information.
[UT3 DD EE FF GG]
DD, EE:Status information.
FF[0]: OBC's state.(0:alive,1:dead)
FF[1]: Tx-TNC's state.(0:waiting, 1:sending)
FF[2]~[7]: (undefined)
GG: Max. of RSSI.
[UT4 HH II JJ]
HH: BATT V.
II: Solar REF.
JJ: Tmp BATT.
[UT5 KL MN OP]
Upper bits of Solar I - each data(4bit)*6=3byte.
[UT6 QR ST UV WX GG]
Q~X is Upper bits(4big) of each data.
Q~V: Temperature of each panel.
W : Temperature of battery.
X : Temperature of FM tramsmitter.
GG : Max. of RSSI.
UT1 05.07.2003, 0600 UTC 436,8475 MHz: www.space.t.u-tokyo.ac.jpUT2 05.07.2003, 0600 UTC 436,8475 MHz: 06 3A 2AUT3 05.07.2003, 0600 UTC 436,8475 MHz: E3 B8 00 3BUT4 05.07.2003, 0600 UTC 436,8475 MHz: 2F 43 57UT5 05.07.2003, 0600 UTC 436,8475 MHz: 10 20 04UT6 05.07.2003, 0600 UTC 436,8475 MHz: 64 55 55 54 3E
erste empfangene Telemetrie
ut3 1. .. 00 46 ut4 2e 43 49 ut5 00 00 00
01.07.2003, 1707 UTC, 436,856 MHz
erste empfangene CW-Telemetrie am 01.07.2003, 1707 UTC
ut3 19b80046 ut4 2f4256 ut5 041370 ut6 6666656644 ut1 www.space.t.u-tokyo.ac.jp ut2 1d0895 ut3 19b80048 ut4 30435e ut5 00a011 ut6 776676775e ut1 www.space.t.u-tokyo.ac.jp ut2 1d0903 ut3 19b80045 ut4 2f4257 ut5 100370 ut6 666776663b ut1 www.space.t.u-tokyo.ac.jp ut2 1d0971 ut3 19b.0038 ut4 324259 ut5 0a7130 ut6 677775663a ut1 www.space.t.u-tokyo.ac.jp ut2 1d09df ut3 19380035 ut4 33357f ut5 401000 ut6 9998989838 ut1 www.space.t.u-tokyo.ac.jp ut2 1d0a52 ut3 19b80023 ut4 2f425b ut5 083340 ut6 7677756622 ut1 www.space.t.u-tokyo.ac.jp ut2 1d0ac0 ut3 19b80027 ut4 2f4258 ut5 202006 ut6 6776656622 ut1 www.space.t.u-tokyo.ac.jp ut2 1d0b2e
11.10.2006, 1738-1751UTC, 436.856 MHz
ut2 23070d ut3 24b80022 ut4 314254 ut5 045013 ut6 666676672c ut1 www.space.t.u-tokyo.ac.jp ut2 23077b ut3 24b8002c ut4 33425b ut5 300510 ut6 77788787..
16.10.2007, 1533UTC, 436.856 MHz
11.04.2008 1153 XIIV ---------------------------- ut3 afb80061 ut4 334265 ut5 402004 ut6 7777777748 ut1 www.space.t.u-tokyo.ac.jp ut2 aa81c0 ut3 afb80051 ut4 2f4352 ut5 0a4070 ut6 6676656642 ut1 www.space.t.u-tokyo.ac.jp ut2 aa8229 ut3 afb8004b ut4 304253 ut5 205004 ut6 6766666645 ut1 www.space.t.u-tokyo.ac.jp ut2 aa8297 ut3 afb80037 ut4 304252 ut5 041540 ut6 6666666637 ut1 www.space.t.u-tokyo.ac.jp ut2 aa8300 ut3 afb80036 ut4 2f4252 ut5 007007 ut6 776766662a ut1 www.space.t.u-tokyo.ac.jp ut2 aa836e ut3 afb8002c ut4 314252 ut5 112720 ut6 7676677726 ut1 www.space.t.u-tokyo.ac.jp ut2 aa83dc ut3 afb80027 ut4 314252 ut5 00000a ut6 666666662a
11.04.2008, 1553UTC, 436.856 MHz
Homepage und weitere Info’s
http://www.space.t.u-tokyo.ac.jp/gs/en/index.html
QSL Info
Anschrift für SASE
113-8656 Nakasuka Lab, Dep. of Aeronautics and Astronautics, School of Engineering, Univ. of Tokyo, 7-3-1 Hongo Bunkyo-ku Tokyo JAPAN
Weitere Infos findet man unter http://www.space.t.u-tokyo.ac.jp/cubesat/swl/index-e.html