CUTE-1.7+APDII AFSK/GMSK, Earth Pictures
AFSK
GMSK
SRLL
Earth Picture #1
Earth Picture #2,#3,#4
Earth Picture #5,#6
Earth Movie #1,#2
HK data analysis
-----------------------------------------------------
AFSK
437.475MHz, 1200bps AFSK, HK_data
Over Japan only
Received JE9PEL
Using OBJECT C:
JQ1YTC>JQ1YCZ [04/29/08 11:47:00z] <UI C>:.....
JQ1YTC>JQ1YCZ [04/29/08 11:47:03z] <UI C>:.....
JQ1YTC>JQ1YCZ [04/29/08 11:47:06z] <UI C>:.....
JQ1YTC>JQ1YCZ [04/29/08 11:47:09z] <UI C>:.....
JQ1YTC>JQ1YCZ [04/29/08 11:47:12z] <UI C>:.....
JQ1YTC>JQ1YCZ [04/29/08 11:47:15z] <UI C>:.....
JQ1YTC>JQ1YCZ [04/29/08 11:47:18z] <UI C>:.....
JQ1YTC>JQ1YCZ [04/29/08 11:47:21z] <UI C>:.....
JQ1YTC>JQ1YCZ [04/29/08 11:47:24z] <UI C>:.....
JQ1YTC>JQ1YCZ [04/29/08 11:47:39z] <UI C>:.....
JQ1YTC>JQ1YCZ [04/29/08 11:47:42z] <UI C>:.....
JQ1YTC>JQ1YCZ [04/29/08 11:47:45z] <UI C>:.....
JQ1YTC>JQ1YCZ [04/29/08 11:47:48z] <UI C>:.....
JQ1YTC>JQ1YCZ [04/29/08 11:47:51z] <UI C>:.....
JQ1YTC>JQ1YCZ [04/29/08 11:48:00z] <UI C>:.....
JQ1YTC>JQ1YCZ [04/29/08 11:48:03z] <UI C>:.....
JQ1YTC>JQ1YCZ [04/29/08 11:48:12z] <UI C>:.....
JQ1YTC>JQ1YCZ [04/29/08 11:48:15z] <UI C>:.....
JQ1YTC>JQ1YCZ [04/29/08 11:48:18z] <UI C>:.....
JQ1YTC>JQ1YCZ [04/29/08 11:48:21z] <UI C>:.....
JQ1YTC>JQ1YCZ [04/29/08 11:48:33z] <UI C>:.....
JQ1YTC>JQ1YCZ [04/29/08 11:49:00z] <UI C>:.....
JQ1YTC>JQ1YCZ [04/29/08 11:49:21z] <UI C>:.....
JQ1YTC>JQ1YCZ [04/29/08 11:49:24z] <UI C>:.....
JQ1YTC>JQ1YCZ [04/29/08 11:49:30z] <UI C>:.....
Subject: [amsat-bb] Emergency in Cute-1.7
From: Hiroki Ashida
Date: Wed, 30 Apr 2008 12:34:44 +0900
Hello All,
I'd like to inform you about the current status of our satellite,
Cute-1.7 + APD II.
There has been some strange behaviours on Cute that the battery voltage
is very low in the FM packet though it is nominal value in the CW frame.
The level of the voltage from FM packet indicates that our satellite may
be in danger.
We've been investigating the problem but informations we have are very
small, so I'd like to appeal for your kind cooperation.
Our satellite transmits its beacon at 437.275MHz by CW(Morse Code) and
the beacon includes the battery voltage.
Details are explained in the web-page:
http://lss.mes.titech.ac.jp/ssp/cute1.7/cwtelemetry_e.html
There's no FM telemetry transmission excpept over Japan but CW
information is remakably helpful for us.
If you have any questions, please don't hesitate to contact me.
Best Regards,
Hiroki
Cute-1.7 + APD II
--
Hiroki Ashida
Laboratory for Space Systems
Department of Mechano-Aerospace Engineering
Tokyo Institute of Technology
----------------------------------------------------------------------
Subject: [amsat-bb] Cute-1.7 Follow-up Report
From: Hiroki Ashida
Date: Thu, 01 May 2008 11:23:56 +0900
Hello All,
I'd like to inform you the current status of the Cute-1.7 + APD II.
First of all, thank you very much for many kind cooperations! We are
grateful to you all.
According to the informations you gave us, now we believe that our
satellite is normal.
Using an engineering model, we confirmed the same phenomena, which has
different battery voltages between one in CW frame and another one in
FM packet, occurs on rare occasions. But in fact, there's no voltage
reduction because the frequency of the CW beacon is very stable.
We are going to operate it carefully, but no more an emergency mode.
Thanks again!
Best Regards,
Hiroki
Cute-1.7 + APD II
--
Hiroki Ashida
Laboratory for Space Systems
Department of Mechano-Aerospace Engineering
Tokyo Institute of Technology
----------------------------------------------------------------------
CUTE-1.7 + APD II, AFSK hexadecimal
Ascii:
JQ1YTC>JQ1YCZ [05/01/08 19:54:17] <UI C>:.Sx
JQ1YTC>JQ1YCZ [05/01/08 19:54:19] <UI C>:.Sx
JQ1YTC>JQ1YCZ [05/01/08 19:54:48] <UI C>:.Sx
Binary:
4A 51 31 59 54 43 3E 4A 51 31 59 43 5A 20 5B 30 35 2F 30 31 2F 30 38 20 20 31 39 3A 35 34 3A 31 37 5D 20 3C 55 49 20 43 3E 3A D0 13 78 00 00 00 00 0D 0A
4A 51 31 59 54 43 3E 4A 51 31 59 43 5A 20 5B 30 35 2F 30 31 2F 30 38 20 20 31 39 3A 35 34 3A 31 39 5D 20 3C 55 49 20 43 3E 3A D0 13 78 00 00 00 00 0D 0A
4A 51 31 59 54 43 3E 4A 51 31 59 43 5A 20 5B 30 35 2F 30 31 2F 30 38 20 20 31 39 3A 35 34 3A 34 38 5D 20 3C 55 49 20 43 3E 3A D0 13 78 00 00 00 00 0D 0A
----------------------------------------------------------------------
FM packet analysis data from 2008/4/30 10:10
Transmit DAQ gyro data
Gyro censor
magnet censor
(C)Tokyo Institute of Technology
----------------------------------------------------------------------
CUTE1.7+APDII Telemetry Decoder
http://www.ne.jp/asahi/hamradio/je9pel/cut17dec.htm
----------------------------------------------------------------------
CUTE1.7+APDII Telemetry formula
Subject: [amsat-bb] Cute-1.7 : FM Packets for 24hours
From: Hiroki Ashida
Date: Tue, 03 Jun 2008 20:58:46 +0900
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
Laboratory for Space Systems
Department of Mechano-Aerospace Engineering
Tokyo Institute of Technology
CUTE-1.7+APDII camera Earth Picture
(C) Tokyo Institute of Technology
This above picture is directly linked into 'Tokyo Institute of Technology' from here. And
it is the effort of the grand station and the result of the reports from many satelliter.
Cute-1.7 position at the time of the photography
Latitude : N 28.905 deg
Longitude: E 146.040 deg
Altitude : 620.178002 km
Re: CUTE-1.7+APDII camera Earth Picture
The grand station says as follows:
The CMOS camera like Mobile device is carried in Cute-1.7 + APD II.
A picture is acquired by controlling from PDA which is OBC.
Furthermore JPEG conversion is performed inside PDA. And the file size
is compressed, and the downlink is carried out on the ground station
using FM packet with a U-band.
When a camera turned to the direction of the earth, a photograph was
set up and taken so that a shutter might be cut. However, since this
function worked normally, it is still under examination whether it is
that the earth was reflected.
Cute-1.7 + APD II took four photographs by the present and carried out
the downlink of the thumbnail (64*48 pixels) about these all.
The photograph of the full-size picture (640*480 pixels) which the earth
is reflected finely and the downlink has completed is only what was
exhibited on my website the other day.
Earth Picture analysis by the grand station
CUTE-1.7+APDII camera Earth Picture was analyzed by the grand station as follows.
First, rotate the picture by 180degrees.
Can you see land in the left side of the picture?
Using the Google Earth and see Japan from the position of Cute-1.7
then trim the image by 60 degrees. Coastlines are identical.
To clearly compare them, look at the picture below.
In the picture, parts of coastlines are accentuated. Also, shapes of clouds looks the same.
JA1GDE/Mr.Kasei gives us the following picture which clearly shows
what was in the picture. We'd like to say thank you for Mr.Kasei.
The other Earth pictures: http://www.ne.jp/asahi/hamradio/je9pel/cut17ap2.htm
GMSK
I decoded today, 25Jun2008, CUTE-1.7+APDII GMSK (9600bps).
Ground Station is now testing to digipeat GMSK over Japan.
JQ1YTC>JQ1YCZ [06/25/08 12:00:35z] :GMSK Test
JQ1YTC>JQ1YCZ [06/25/08 12:00:37z] :GMSK Test
JQ1YTC>JQ1YCZ [06/25/08 12:00:42z] :GMSK Test
JQ1YTC>JQ1YCZ [06/25/08 12:01:00z] :GMSK Test
JQ1YTC>JQ1YCZ [06/25/08 12:01:05z] :GMSK Test
JQ1YTC>JQ1YCZ [06/25/08 12:01:06z] :GMSK Test
JQ1YTC>JQ1YCZ [06/25/08 12:01:09z] :You'reGmskReceiver!
JQ1YTC>JQ1YCZ [06/25/08 12:01:12z] :You'reGmskReceiver!
JQ1YTC>JQ1YCZ [06/25/08 12:01:36z] :You'reGmskReceiver!
More information: http://www.ne.jp/asahi/hamradio/je9pel/ct17gmsk.htm
SRLL protocol
SRLL protocol: http://www.ne.jp/asahi/hamradio/je9pel/srllprot.htm
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