[amsat-bb] Re: Cute-1.7 : FM Packets for 24hours

[Mike Rupprecht]

Hi,

low elevation pass for me (only 6°) but could decode some frames.

packet frame every 16 seconds:

[26 Bytes KISS Frame (without CRC)]
ctrl: 3   PID: F0 {UI}   7 Payload Bytes
from JQ1YTC to JQ1YCZ: 
   1 > D0 14 84 3A 20 32 30 
Ð.„: 20


2008-06-03 18:05:33.110 UTC: D0 14 88 00 00 00 00 
2008-06-03 18:05:49.130 UTC: D0 14 88 00 00 00 00 
2008-06-03 18:06:37.130 UTC: D0 14 87 00 00 00 00 
2008-06-03 18:06:53.130 UTC: D0 14 87 00 00 00 00 
2008-06-03 18:07:25.130 UTC: D0 14 86 00 00 00 00 
2008-06-03 18:07:41.130 UTC: D0 14 86 00 00 00 00 
2008-06-03 18:07:57.130 UTC: D0 14 86 00 00 00 00 
2008-06-03 18:08:13.130 UTC: D0 14 86 00 00 00 00 
2008-06-03 18:08:29.130 UTC: D0 14 86 00 00 00 00 
2008-06-03 18:09:01.130 UTC: D0 14 85 00 00 00 00 
2008-06-03 18:09:17.130 UTC: D0 14 85 00 00 00 00 
2008-06-03 18:09:33.130 UTC: D0 14 85 00 00 00 00 
2008-06-03 18:09:49.130 UTC: D0 14 85 00 00 00 00 
2008-06-03 18:10:05.130 UTC: D0 14 85 00 00 00 00 
2008-06-03 18:10:21.130 UTC: D0 14 85 00 00 00 00 
2008-06-03 18:10:37.140 UTC: D0 14 84 00 00 00 00 
2008-06-03 18:11:25.140 UTC: D0 14 84 00 00 00 00 
2008-06-03 18:11:41.140 UTC: D0 14 84 00 00 00 00

73, Mike
DK3WN

-----Ursprüngliche Nachricht-----
Von: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] Im
Auftrag von Hiroki Ashida
Gesendet: Dienstag, 3. Juni 2008 13:59
An: AMSAT Bulletin Board
Betreff: [amsat-bb] Cute-1.7 : FM Packets for 24hours

Dear All,

I'm Hiroki Ashida at Tokyo Institute of Technology (JQ1YCZ). I'd like
to inform you about our satellite's operation.

We started a long-run (continuous 24hours) of the APD sensor at 11:30,
Jun 3 (UTC) and it will be turned off on 11:30, Jun 4(UTC). During the
APD is turned on, the APD status packet can be heard everywhere in the
world.

FM packets are transmitted on 437.475MHz and packet formats are
available in the following web-page.
http://lss.mes.titech.ac.jp/ssp/cute1.7/fm_mode_apd_e.html

4A-51-31-59-54-43-3E-4A-51-31-59-43-5A-3A-D0-30-77-B8-03-16-99
For exapmle, according to an above APD status packet we can obtain
informations as;
4A-51-31-59-54-43-3E-4A-51-31-59-43-5A-3A : Header(JQ1YTC>JQ1YCZ)
D0 : APD Packet ID (Fixed)
30 : Status Code
	APD Status : Operational
	HV Status  : Set Value = Output Value
	Temp Correction : Active
	Data Mode  : Counter Valid
	Detector   : APD A
	APD Gain   : Gain 30
	Threshold  : 219mV
77 : Temperature
	0x77 = 119 -> (119/255)*91.712-48.569 = -5.7 [degC]
B8 : High Voltage
	0xB8 = 184 -> (184/255)*396.5 = 286 [V]
03-16-99 : Counter
	0x1699 = 5785 -> 5785 * 2^3 = 46280

Latest TLE from NORAD is;
Cute-1.7 + APD II
1 32785U 08021C   08154.79960534  .00000134  00000-0  24077-4 0   664
2 32785 097.9934 214.7536 0014695 178.3289 181.7972 14.81362228  5275

Though the observation data will be stored in FRAMs, we'd like to know a
real-time status of the APD during the observation. Your kind reports
will be highly appreciated!

Best Regards,
Hiroki Ashida
Cute-1.7 + APD II
-- 
Hiroki Ashida <hiroki at lss.mes.titech.ac.jp>
Laboratory for Space Systems
Department of Mechano-Aerospace Engineering
Tokyo Institute of Technology
TEL/FAX : +81-3-5734-2644
Room 554, Ishikawadai 1st Bldg, Tokyo Institute of Technology
2-12-1 O-okayama, Meguro-ku, Tokyo, Japan
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