SRMSAT

SRMSAT, Jugnu




The PSLV C-18 Mission is a Grand success. All the four satellites,
Megha-Tropiques, VesselSat-1, SRMSAT, Jugnu were successfully injected
into their precise orbits. The Jugna was injected at 05:56 UT.
India have been successfully placed in orbit at 11:32 Am IST, 12 Oct 2011.

SRMSAT beacon: 437.425MHz CW
Jugnu  beacon: 437.275MHz CW

SRM
1 99999U 11072A   11278.34967500  .00001077  00000-0  60876-3 0  1233
2 99999  20.0603  97.4017 0010015 338.6461 208.4324 14.09199968    14
JNU
1 99999U 11072A   11285.24724444  .00001785  00000-0  96625-3 0  1235
2 99999  20.0506  66.7109 0018405   5.1080 190.7439 14.11338922    19

Heard CW on 437,275 MHz (JNU) over France during last pass (08h45 UT)


SRMSAT
Organisation: SRM University, India
Freq: 437.425MHz CW
Freq: Up 145.900MHz / Dn 437.500MHz
Rate: Up 1 kbps  / Dn 2.4 kbps
http://www.srmsat.in/

SRMSAT


Jugnu
Organisation: Indian Institute of Technology Kanpur, India
Freq: 437.505MHz, (CW)437.275MHz
Rate: ?
http://www.iitk.ac.in/me/jugnu/

Jugnu




SRMSAT CW analysis

20:27-20:39UTC, 12 Oct 2011, Ele 9 S-SE, 437.425MHz CW
http://www.ne.jp/asahi/hamradio/je9pel/11013srm.mp3
...PXCSRMVUCZZPXCSRM...

SRMVU
1 55555U 11072A   11285.24558449  .00001106  00000-0  60777-3 0  1231
2 55555  19.9698  66.2533 0014244 344.0462 200.8483 14.10647952    17


I analyzed CW data 'SRMVUCZZPXC' captured today morning as follows.

1 2 3 4 5 6 7 8 91011
S R M V U C Z Z P X C

6  C  ... Normal Mode
7  Z  ... Ready
8  Z  ... GPS Status Z
9  P  ... Payload Status P
10 X  ... 10 to 20 degree celcius
11 C  ... Less than 7 V

Cf.
http://srmsat.in/srmvu.html

Character 6: Satellite Mode
1. P - Sensing Mode
2. X - Communication Mode
3. C - Normal Mode
4. Z - Detumbling Mode

Character 7: Magnetometer Status
1. C - On
2. P - Off
3. X - Error
4. Z - Ready

Character 8: GPS Status

Character 9: Payload Status

Character 10: Temperature Status
1. C - < 0 degree celcius
2. P - 0 to 10 degree celcius
3. X - 10 to 20 degree celcius
4. Z - 20 to 30 degree celcius
5. 6 - 30 to 40 degrees celcius
6. 4 - Above 40 degrees celcius

Character 11: Battery Status
1. C - Less than 7 V
2. P - >7V and <7.3V
3. X - >7.3V and <7.6V
4. Z - >7.6V and <7.9V
5. 6 - >7.9V and <8.1V
6. 4 - >8.1V


SRM CW Decoder

This software were developed by University of Khartoum, India.

 1. Install 'winrar401j.exe'(for Japanese) or 'wrar401.exe'(for English).
 2. Confirm 'MSVCR71.DLL' in your C:\windows\sistem32.
 3. Download 'SRM CW Decoder.rar' from http://www.megaupload.com/?d=7PWS7GEA
 4. Wait 44 seconds, then 'Regular download' button are appeared and click!
 5. Install 'SRM CW Decoder.rar'.
 6. Click on Beacon menu in 'SRMVU_Decoder.exe'.
 7. Import a text file that contains SRMVU telemetry data like a next example.
 8. SRMVUCZZPXC
    SRMVUPPXP64
    SRMVUXXXXCC
    SRMVUPCCCZZ
 9. Click an item button to display a graph.
10. Click 'Save As' button, then a text file is generated as follows.

No. SatName  Satellite Mode  Magnetometer Status  GPS Status  Payload Status  Temperature Status  Battery Status
0   SRMVU    Normal Mode     Ready                Ready       OFF             10 to 20            Less than 7
1   SRMVU    Sensing Mode    OFF                  Error       OFF             30 to 40            >8.1V
2   SRMVU    Communication Mode   Error           Error       Error           < 0                 Less than 7
3   SRMVU    Sensing Mode    ON                   ON          ON              20 to 30            >7.6V and <7.9V




Re: Jugnu (JNU)

--- Original Message ---
Subject: [amsat-bb] Re: Jugnu (JNU)
From: Shashank Chintalagiri
Date: Mon, 17 Oct 2011 12:32:33 +0530

For the record, the TLE we track with us that for object E.
The frequency is 437.275 and TLE defined doppler. I'm in class right now,
so can't look for the specific number. We heard it in 4 and 17 degree
elevation passes, so when it is on, signal strength is probably not an issue.

Our payload turns on whenever we command it to, and downlink is initiated
from the ground. That is on a separate frequency, though, and we aren't
doing it just yet while we try to understand the power situation.

Chintalagiri Shashank
Indian Institute of Technology, Kanpur
http://blog.chintal.in
ttp://home.iitk.ac.in/~chintal/downloads/resume_core.pdf


I, JE9PEL think that 'separate frequency' mentioned above is

Jugnu: CW Beacon - 437.275MHz
       Pay load  - 437.505MHz

Because there are some reception reports in 437.275MHz.


Jugnu CW

Received by JE1CVL over Japan.
22:21-22:33UTC, 19 Oct 2011, Ele 12 deg, 437.275MHz CW

JUGNUPPPPPKMCKAATEAAAAAMZXYAAAFGAAAO
JUGNUPPPPPKOKKAATEAAAAAMZXYAAAGGAAAS
JUGNUPPPPPKPCKAATEAAAAAMZXYAAAGVAAAA
JUGNUPPPPPKBDKAATEAAAAAMZXYAAAFGAAAT
JUGNUPPPPPKDBKAATEAAAAAMZXYAAAEGAAAQ
JUGNUPPPPDKEDKAATEAAAAAMZXYAAAGGAAAP

9:58-10:08UTC, 2 Nov 2011, Ele 6 S-SE, 437.275MHz CW, by JE9PEL
http://www.ne.jp/asahi/hamradio/je9pel/11102jug.mp3

JUGNUMPPPPYHFCAATGAAAAANZXYAAAFGAZO
JUGNUMPPPPYKFCAATGAAAAANZXYAAAGGAZO
JUGNUMPPPPYPFCAATGAAAAANZXYAAAGGAZT

9:43-9:53JUTC, 3 Nov 2011, Ele 7 WS-S-SN, 437.275MHz CW
JUGNUMPPPPZLBCAATEAAAAANZXYAAAGGASAT
JUGNUMPPPPZOBCAATEAAAAANZXYTAAGGZAAV