SRMSAT spurious emission or FCD front-end overload ?

 SRMSAT    Spurious emission or FCD  front-end overload ?

The center frequency was ok with Doppler  .
Spaces between the main frequency and Spurious frequencies was 25 KHz at both side .

Pre-Amp position does not affect the presence of it.
For sure it's most prominent during on position.
Need more  digital  tracking  and dusting off my analogue gear  :)
Have fun with fun-cube.

                      

SRMSAT and JUGUN TLM

SATUTC 22:00 22:18
Jugnu not heard !!!

UTC 22:19 22:36
Good signal RX , A continuous loop of :
SRMVUCZZPPC
SRMVUCZZPPC

KNSAT-1 Decoder analysis :

Satellites Name were Swapped !!

SRMVU TLM

16:58 17:15 UTC

SRMVUCZZPXC
SRCVUCZZPXC
SRMVUCZZPXC
SRCVUCZZPXC

Still I’ve noticed the swap between the names of SRMSAT and JUGNU satellite since last week?? Kep elements are ok .Only the names had been swapped.!!!

SRMVU & HRD satellite tracking software.

SRMSAT CW TLM

See and listen to SRMVU CW telemetry Beacon .

SRMVU CW TLM

19:27 19:42 UTC
Orbit #164
Max EL 20*

Telemetry Beacon sending the same loop (srmvuczzpccsrmvuczzpccsrmvuczzpcc).
Still Object D (2011-058D) is most accurate Object to track!

SRMSAT TLM

21:40 21:51 UTC
ORBIT # 137
Max El 41*

SRMSAT TLM

19:53 20:07 UTC
Orbit #136
srmvuczzpcc
srmvuczzpcc
srmvuczzpcc
srmvuczzpcc

SRMVU Beacon Telemetry

23:42 23:59 UTC
Orbit # 124
TLM
srmvuczzpccsrmvuczzpccsrmvuczzpccsrmvuczzpccsrmvuczzpccsrmvuczzpccsrmvuczzpcc
srmvuczzpccsrmvuczzpcc

SRMVU CW TLM

22:05 22:22 UTC
Orbit # 109
Max El 31*

I've been using object D
It does a great job with HRD satellite tracking.

SRMVU (Object D)CW TLM Received :


srmvuczzpcc
srmvuczzpcc
srmvuczzpcc
srmvuczzpcc
srmvuczzpcc
srmvuczzpcc

SRMVU CW TLM

22:18 22:34 UTC
Orbit # 95
The accurate object to follow is Object D.

2011-058D
1 37841U 11058D 11290.65819802 .00000264 00000-0 00000+0 0 60
2 37841 19.9762 33.5860 0011753 37.8214 322.3015 14.10073457 778
/EX

Last CW TLM Received :

srmvuczzpcc
srmvuczzpcc
srmvuczzpcc
srmvuczzpcc
srmvuczzpcc
srmvuczzpcc

SRM CW Dedoder Help de Mineo Wakita Blog

KN-Sat1 を開発中の、インド Khartoum大学 (University of Khartoum) により、
｢SRMSAT CW Decoder｣ が公開されました。ダウンロード方法、および解析結果を
次に英文で紹介します(文責 JE9PEL/1)。 なお、解析結果は txtファイルとして
保存できますが、見やすくするため少し編集しました。

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

Sourse

SRMVU Telemetry!

22:27 22:42 UTC
Orbit # 81
Max EL 23*
Telemetry
srmvuczzpcc
srmvuczzpcc
srmvuczzpcc
srmvuczzpcc

SRMVU CW Decoding Software

As a contribution from CubeSat Project Team in the University of Khartoum to SRM University for the success in launching SRMVU nanosatellite. Here is a version of Telemetry Decoding Software which was developed by University students for studying the University of Khartoum Cube satellite (KN-SAT1)telemetry data. A modification was made to be used with SRMVU data.

click the following link to download it, please report any problems to the team.

SRMVU Decoder

http://cubesat.uofk.edu

SRM University's satellite to take to the skies

Students of SRM University explaining the features of SRMSAT to be launched along with Megha-Tropiques satellite, on board PSLV-C18, to university president P. Sathyanarayanan and Chancellor T.R. Pachamuthu in Chennai on Monday. Photo: M. Vedhan

As the PSLV-C18 carrying Megha-Tropiques, an Indo-French venture to study the atmosphere in the tropical regions, blasts off from Satish Dhawan Space Centre at Sriharikota on October 12, students will be holding their breath at the ground station at SRM University in the city outskirts.

Along with Megha-Tropiques, SRMSAT, a nano-satellite, to monitor the green house gases, carbon-dioxide and water vapour in the tropics using a grating spectrometer will be launched.

“Fifty students were involved in design and development of SRMSAT, one of the first nano-satellites to be launched by a private university in the country,” said P. Sathyanarayanan, president, SRM University.

“There is a dedicated lab at the university. All the students involved in the project worked at the lab, after college hours, for the past two years, choosing to stay late in the night designing and testing each and every instrument,” says L.B. Vishal, a mechanical engineering student.

When they found that the power amplifier on board was dissipating heat, the students came up with heat sinks. Likewise, communication systems were arrived at after a lot of simulation. Students of 12 departments began work on the satellite with the survey of literature and Loganathan, a former ISRO scientist and product architect of space systems at the university, was available 24x7 to make the dream project a reality. ISRO scientists conducted a review of the project every month and gave insights.

Of cuboid model, the nano-satellite weighs 10.4 kg with three solar panels and was made at a cost of Rs.1.5 crore. The grating spectrometer will monitor earth-based sources and sinks of green house gases for the next two years.

Already in place, the ground station consists of two Yagi-Uda antennae with low noise amplifiers and Trans-receiver and auto tracking is through a satellite tracking programme. “The ground station has been tested by tracking the existing satellites,” says D. Narayana Rao, Director, Research.

“The University is in talks with ISRO to start a Centre for Space Sciences in its Chennai campus. It will take six months to crystallize,” Mr. Sathyanarayanan said. University Chancellor T.R. Pachamuthu and Vice-Chancellor M. Ponnavaikko were present.

Sorse

SRMVU CW Decoder

SRMVU heard over Africa

23:33 -23:46 UTC.
Orbit # 11.
Max Eleveation 11 deg.
The beacon was clear with on and off deep QSB !.
Dopper corection HRD.

73's

SRMVU Entire Pass Vedio Clip

Congratulation to SRMVU team for the great succes

Without a break to hold a breath ,A continous telemetry received with the same data.

Srmvuczzpxc srmvuczzpxc srmvuczzpxcc srmvuczzpxcc srmvuczzpxcc srmvuczzpxcc etc

Signal was stable and strong .

INHO for such a simple telemetry they had missed to give a break for the transmitter .At least for a period of several seconds