KAI-1 telemetry


1k2 AFSK, modulation of the second data packet still unclear

2022-08-12 11:06:58.190
Packet number 1
0000: C0 00 86 A2 40 40 40 40 40 A4 A6 64 6C A6 40 21
0010: 0C 01 30 31 30 31 30 34 30 34 30 30 30 30 3B 55
0020: 31 42 53 3D 38 30 34 37 3B 55 32 42 53 3D 38 30
0030: 36 34 3B 55 33 42 53 3D 38 30 36 34 3B 49 41 42
0040: 3D 2D 36 34 3B 49 53 55 4E 3D 32 37 32 3B 54 43
0050: 50 55 3D 31 35 3B 54 31 41 42 3D 31 31 3B 54 32
0060: 41 42 3D 31 3B 54 33 41 42 3D 31 3B 54 34 41 42
0070: 3D 32 3B 54 52 46 3D 33 3B 66 42 43 4B 3D 33 46
0080: 3B 66 31 63 64 3D 33 3B 66 31 73 70 3D 31 33 3B
0090: 66 32 63 64 3D 30 3B 66 32 73 70 3D 31 32 C0

!..010104040000;U1BS=8047;U2BS=8064;U3BS=8064;IAB=-64;ISUN=272;TCPU=15;T1AB=11;T2AB=1;T3AB=1;T4AB=2;TRF=3;fBCK=3F;f1cd=3;f1sp=13;f2cd=0;f2sp=12

2022-08-12 11:07:58.190
Packet number 2
0000: C0 00 86 A2 40 40 40 40 40 A4 A6 64 6C A6 40 21
0010: 0E 01 30 31 30 31 30 34 30 34 30 31 30 30 3B 55
0020: 31 42 53 3D 38 30 38 38 3B 55 32 42 53 3D 38 30
0030: 36 34 3B 55 33 42 53 3D 38 30 36 34 3B 49 41 42
0040: 3D 2D 32 35 36 3B 49 53 55 4E 3D 34 38 30 3B 54
0050: 43 50 55 3D 31 35 3B 54 31 41 42 3D 31 31 3B 54
0060: 32 41 42 3D 31 3B 54 33 41 42 3D 31 3B 54 34 41
0070: 42 3D 32 3B 54 52 46 3D 33 3B 66 42 43 4B 3D 33
0080: 46 3B 66 31 63 64 3D 33 3B 66 31 73 70 3D 31 33
0090: 3B 66 32 63 64 3D 30 3B 66 32 73 70 3D 31 32 C0
00A0:

!..010104040100;U1BS=8088;U2BS=8064;U3BS=8064;IAB=-256;ISUN=480;TCPU=15;T1AB=11;T2AB=1;T3AB=1;T4AB=2;TRF=3;fBCK=3F;f1cd=3;f1sp=13;f2cd=0;f2sp=12
**********************************************************

GEOSCAN-EDELVEIS – 9k6 beacons


traffic between the ground station and satellite

2022-08-11 13:52:51.200
Packet number 32
0000: C0 00 01 00 26 04 20 84 8A 82 86 9E 9C 60 A4 A6
0010: 64 60 A6 40 60 03 F0 0C 00 E1 05 BD 05 1B 00 09
0020: 00 58 9E C7 09 E6 EB 00 F8 01 00 00 00 00 00 00
0030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0040: 00 00 C0

2022-08-11 13:53:23.760
Packet number 33
0000: C0 00 01 00 26 04 20 84 8A 82 86 9E 9C 60 A4 A6
0010: 64 60 A6 40 60 03 F0 0C 00 E1 05 BD 05 1B 00 09
0020: 00 58 9E C7 09 E6 EB 00 F8 01 00 00 00 00 00 00
0030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0040: 00 00 C0

2022-08-11 13:53:56.320
Packet number 34
0000: C0 00 01 00 26 04 20 84 8A 82 86 9E 9C 60 A4 A6
0010: 64 60 A6 40 60 03 F0 0C 00 E1 05 BD 05 1B 00 09
0020: 00 58 9E C7 09 E7 EC 00 F8 01 00 00 00 00 00 00
0030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0040: 00 00 C0

SKOLTECH-B1 and -B2 very strong


435.000MHz 9k6 GMSK USP

both satellites use the same AX.25 call …

1:Fm R0AJU-1 To R0AJU [01:20:48R]
2022-08-10 23:20:48.555
Packet number 11
0000: C0 00 A4 60 82 94 AA 40 60 A4 60 82 94 AA 40 63
0010: 00 F0 B1 A0 0E 00 01 00 18 00 CE CC CC 3F 99 99
0020: 99 3F AE 47 E1 BE 00 00 00 00 00 00 00 00 00 00
0030: 00 00 C0

1:Fm R0AJU-1 To R0AJU [01:20:52R]
2022-08-10 23:20:52.805
Packet number 12
0000: C0 00 A4 60 82 94 AA 40 60 A4 60 82 94 AA 40 63
0010: 00 F0 42 9C 0D 00 01 00 54 00 68 00 80 0E 68 38
0020: 00 00 6D 38 5F 38 5F 38 00 00 F9 05 8E 00 A3 3B
0030: F4 62 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 C0

1:Fm R0AJU-1 To R0AJU [01:20:53R]
2022-08-10 23:20:53.335
Packet number 13
0000: C0 00 A4 60 82 94 AA 40 60 A4 60 82 94 AA 40 63
0010: 00 F0 B1 A7 0D 00 01 00 30 00 5A 00 5A 00 69 00
0020: 78 00 C1 FF 4B 00 69 00 FE FF F6 FF FB FF C5 FF
0030: 57 00 00 00 00 80 75 FF 84 00 96 00 CD FF A2 FF
0040: 9F FF 9F FF 93 FF 8E FF 8E FF B2 A7 0D 00 01 00
0050: 50 00 74 13 7C 1F E4 0C 0E 00 2B 00 25 00 A0 0F
0060: 90 07 A8 0F 74 1F 70 1F 58 1F 74 1F 70 1F AD 1F
0070: BC 1F 02 00 02 00 D4 07 00 00 02 00 04 00 74 00
0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0090: 39 01 AB 00 8F 00 F6 00 2D 00 00 00 00 00 00 00
00A0: 00 00 C0

1:Fm R0AJU-1 To R0AJU [01:20:53R]
2022-08-10 23:20:53.875
Packet number 14
0000: C0 00 A4 60 82 94 AA 40 60 A4 60 82 94 AA 40 63
0010: 00 F0 B1 A0 0D 00 01 00 18 00 00 00 00 00 00 00
0020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0030: 00 00 C0

SWSU-55 satellites – determination of the spin rate

I am currently working on determining the spin rate of the SWSU-55 satellites. You see from most SSTV images that all SWSU-55 satellites spinning very fast.
Now we are lucky and can read the angular velocity (xyz axis) from the beacon. This shows that the satellite is rotating in all 3 axes, i.e. it is tumbling.
If you look at the field strength, you can see a period of 4.5 sec. I assume that this is one rotation. This results in a value of 13.3 rpm.


Based on the SSTV image you can also see 8 noise dips (lines) within the 36 seconds.

The angular velocity can be computed as w = sqrt(Vx^2 + Vy^2 + Vz^2) and the rotation axis can be computed as the unit vector (Vx, Vy, Vz)/w.

So we see similar rotation values. This is what we get from the gyros, and also from the fades in the signal power and SSTV image. Based on the radiation pattern of a dipole I assume the assignment to the axis as shown in my drawing below.

… and we still observe the Dzhanibekov effect, also called the intermediate axis theorem or tennis racket theorem describes the behaviour of a rigid body with three distinct principal moments of inertia.

13:08:39 RS5S>ALL>UI,C,F0 (1124 baud):
SWSU-55 #7 S=290 U1=4.51 U2=4.37 T1=12.72 Mx=9.643372 My=32.069817 Mz=-48.665386 Vx=-38.816795 Vy=56.412212 Vz=45.847328 Time=1080475103 R
13:09:18 RS5S>ALL>UI,C,F0 (1124 baud):
SWSU-55 #7 S=291 U1=4.48 U2=4.45 T1=13.04 Mx=-16.819834 My=4.709554 Mz=-3.812496 Vx=-48.839695 Vy=-9.167939 Vz=70.931297 Time=1080510009 R
13:12:40 RS5S>ALL>UI,C,F0 (1127 baud):
SWSU-55 #7 S=294 U1=4.43 U2=4.28 T1=14.01 Mx=7.400727 My=-52.253620 Mz=-47.319801 Vx=-48.114502 Vy=6.099236 Vz=-69.580154 Time=1080625225 R
14:42:50 RS5S>ALL>UI,C,F0 (1124 baud):
SWSU-55 #7 S=391 U1=5.00 U2=4.98 T1=12.72 Mx=25.117619 My=42.161720 Mz=34.536728 Vx=-52.977100 Vy=51.541985 Vz=-45.351147 Time=1085566194 R
14:46:13 RS5S>ALL>UI,C,F0 (1125 baud):
SWSU-55 #7 S=394 U1=4.48 U2=4.46 T1=13.37 Mx=-16.595570 My=4.036760 Mz=11.213223 Vx=-45.190838 Vy=-70.725189 Vz=-12.167939 Time=1085680123 R
14:51:34 RS5S>ALL>UI,C,F0 (1126 baud):

all ten SXC3 satellites active and decoded

SXC3-212 (MGU) RS32S 437.550 MHz
1:Fm RS32S-1 To R2ANF [00:00:49R]
2022-08-09 22:00:49.702 UTC
000 > C0 00 A4 64 82 9C 8C 40 60 A4 A6 66 64 A6 40 63 00 F0 16 42
020 > 02 00 01 00 42 00 CF 04 E8 0D 92 15 82 04 02 00 7F 00 28 00
040 > 00 00 1B 00 00 00 00 00 00 00 01 00 02 00 01 00 00 20 00 00
060 > 00 1F 9E D2 00 00 1F D9 F2 62 D4 0C 0B 09 FF 7E 1E 15 7D 0E
080 > 20 D9 F2 62 5A D2 00 00 1E 00 1C 1F C0

SXC3-213 (HSE-AIS) RS21S 435.570 MHz
1:Fm RS21S-1 To R2ANF [23:59:44R]
2022-08-09 21:59:44.590 UTC
000 > C0 00 A4 64 82 9C 8C 40 60 A4 A6 64 62 A6 40 63 00 F0 16 42
020 > 02 00 01 00 42 00 F4 14 E4 14 6A 15 00 00 03 00 00 01 64 00
040 > 00 00 1D 00 00 00 00 00 FE FF FE FF FE FF FE FF 00 20 00 00
060 > 00 1F 19 D2 00 00 DF D8 F2 62 3C 0C 07 05 FF 75 24 1D CF 0E
080 > DF D8 F2 62 E2 D1 00 00 1E 00 18 1F C0

SXC3-214 (MIET-AIS) RS28S 437.900 MHz
1:Fm RS28S-1 To R2ANF [00:04:19R]
2022-08-09 22:04:19.962 UTC
000 > C0 00 A4 64 82 9C 8C 40 60 A4 A6 64 70 A6 40 63 00 F0 16 42
020 > 02 00 01 00 42 00 07 00 1D 00 0B 00 01 00 04 00 00 00 E9 FF
040 > 00 00 1E 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20 02 00
060 > D4 1E CE D2 00 00 F2 D9 F2 62 1B 0C 08 06 FF 65 21 1A 1D 0E
080 > F2 D9 F2 62 96 D2 00 00 1E 00 DC 1E C0

SXC3-215 (Vizard) RS33S 437.800 MHz
1:Fm RS33S-1 To R2ANF [23:57:47R]
2022-08-09 21:57:47.600 UTC
000 > C0 00 A4 64 82 9C 8C 40 60 A4 A6 66 66 A6 40 63 00 F0 16 42
020 > 02 00 01 00 42 00 92 14 9E 14 E9 14 97 00 0F 00 01 00 33 00
040 > 00 00 1E 00 00 00 00 00 FE FF FF FF FF FF FF FF 00 20 00 00
060 > E8 1E 36 D2 00 00 A3 25 D7 62 51 0C 07 06 FF 80 20 17 FA 0E
080 > A3 25 D7 62 00 D2 00 00 1E 00 00 1F C0

SXC3-216 (UTMN) RS23S 435.670 MHz
1:Fm RS23S-1 To R2ANF [00:03:29R]
2022-08-09 22:03:29.732 UTC
000 > C0 00 A4 64 82 9C 8C 40 60 A4 A6 64 66 A6 40 63 00 F0 16 42
020 > 02 00 01 00 42 00 16 00 6E 00 3E 00 02 00 28 00 0F 00 E1 FF
040 > 00 00 23 00 00 00 00 00 02 00 02 00 02 00 02 00 00 20 00 00
060 > C4 1E CD D2 00 00 BF D9 F2 62 EF 0C 0A 09 FF 76 20 18 0A 0E
080 > DB DC D9 F2 62 96 D2 00 00 25 00 DC 1E C0

SXC3-217 (Siren) RS30S 437.750 MHz
1:Fm RS30S-1 To R2ANF [23:58:24R]
2022-08-09 21:58:24.630 UTC
000 > C0 00 A4 64 82 9C 8C 40 60 A4 A6 66 60 A6 40 63 00 F0 16 42
020 > 02 00 01 00 42 00 D3 05 67 14 57 14 10 00 02 00 B0 00 36 00
040 > 00 00 1C 00 00 00 00 00 FA FF FA FF FA FF FB FF 00 20 00 00
060 > E8 1E FD D1 00 00 8F D8 F2 62 D1 0C 04 03 FF 80 20 15 01 0E
080 > 8F D8 F2 62 C4 D1 00 00 1E 00 0C 1F C0

SXC3-218 (KuzSTU) RS34S 437.700 MHz
1:Fm RS34S-1 To R2ANF [00:01:39R]
2022-08-09 22:01:39.712 UTC
000 > C0 00 A4 64 82 9C 8C 40 60 A4 A6 66 68 A6 40 63 00 F0 16 42
020 > 02 00 01 00 42 00 B0 05 C7 14 07 12 04 00 70 00 2A 00 29 00
040 > 00 00 1E 00 00 00 00 00 FF FF FF FF FF FF FF FF 00 20 00 00
060 > DC 1E 93 D2 00 00 51 D9 F2 62 45 0C 08 06 FF 7F 21 1B 77 0E
080 > 52 D9 F2 62 5A D2 00 00 1E 00 FC 1E C0

SXC3-219 (Medex) RS19S 437.650 MHz
1:Fm RS19S-1 To R2ANF [00:02:24R]
2022-08-09 22:02:24.298 UTC
000 > C0 00 A4 64 82 9C 8C 40 60 A4 A6 62 72 A6 40 63 00 F0 16 42
020 > 02 00 01 00 42 00 63 00 8A 01 F1 02 22 00 14 01 68 02 E8 FF
040 > 00 00 1C 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20 00 00
060 > E8 1E 56 D2 00 00 7E D9 F2 62 0E 0C 09 07 FF 7E 20 19 E2 0E
080 > 7F D9 F2 62 1E D2 00 00 1E 00 FC 1E C0

SXC3-2110 (Voenmeh) RS29S 436.050 MHz
1:Fm RS29S-1 To R2ANF [00:05:30R]
2022-08-09 22:05:30.043 UTC
000 > C0 00 A4 64 82 9C 8C 40 60 A4 A6 64 72 A6 40 63 00 F0 16 42
020 > 02 00 01 00 42 00 09 00 07 00 07 00 01 00 02 00 00 00 EA FF
040 > 00 00 1E 00 00 00 00 00 01 00 01 00 01 00 01 00 00 20 00 00
060 > BC 1E DC D3 00 00 38 DA F2 62 4C 0C 0B 09 FF 83 20 07 CA 0E
080 > 38 DA F2 62 A4 D3 00 00 1E 00 DC 1E C0

SXC3-2111 (SibSU) RS8S 435.380 MHz
1:Fm RS8S-1 To R2ANF [00:06:04R]
2022-08-09 22:06:04.912 UTC
000 > C0 00 A4 64 82 9C 8C 40 60 A4 A6 70 A6 40 40 63 00 F0 16 42
020 > 02 00 01 00 42 00 07 00 12 00 0B 00 00 00 04 00 01 00 E1 FF
040 > 00 00 24 00 00 00 00 00 FD FF FE FF FE FF FE FF 00 20 00 00
060 > C8 1E 63 D3 00 00 5A DA F2 62 12 0C 05 03 FF 80 22 19 3A 0E
080 > 5B DA F2 62 2C D3 00 00 24 00 E0 1E C0

AO-73 : Funcube-1

Rotation Period

29 Jul 2022 = 2.27 seconds (from the Sun Sensor Data)
30 Jul 2022 = 2.24 seconds (from the Sun Sensor Data)
31 Jul 2022 = 2.29 seconds (from the Sun Sensor Data)
01 Aug 2022 = 2.27 seconds (from the Sun Sensor Data)
02 Aug 2022 = 2.25 seconds (from the Sun Sensor Data)
03 Aug 2022 = 2.24 seconds (from the Sun Sensor Data)
04 Aug 2022 = 2.29 seconds (from the Sun Sensor Data)

AO-73 continues spinning about the Z-Z axis at a fast rate with the Z-Z axis very slowly precessing about AO-73’s centre of mass in a relatively stable attitude.

73 de Colin VK5HI.