CW SRM Nanosat decoding software

The CubeSat Project Team in the University of Khartoum have made available software to decode the telemetry beacon of the new Amateur Radio satellite built by the SRM University.

The Telemetry Decoding Software was developed by University students for studying the University of Khartoum CubeSat (KN-SAT1) telemetry data. It has now been modified to handle SRMVU data

Download the software at


Good signals received from SRMSAT and JUGNU

Radio Amateurs thanked for Jugnu reports

The Jugnu team say the continuous stream of satellite beacon reports from Radio Amateurs across the world surpassed all their expectations. The team welcome further reports.

On the AMSAT bulletin board Chintalagiri Shashank writes:

I’m the system engineer for the Jugnu nanosatellite project. This is the nanosatellite which is more generally known on this list as JNU, since that was the identifier sent along with the TLE. I’ve been lurking on this list for the past couple of years, ever since we started working on the nanosatellite. I did learn a lot from occasionally perusing through the posts here. Not being a licensed HAM myself, I apologize for intruding into your space here today.

On behalf of the entire Jugnu team, I’d like to thank all of you for the beacon reports you’ve sent our way, both on the list as well as through Mani (VU2WMY). Its been a long couple of years on the project, but the last few days have been a much more intense roller coaster ride. The continuous stream of beacon reports from across the world surpassed all of our expectations, and were the mainstay of our emotional support while we were having difficulties recieving the beacon ourselves. If I do get to meet any of you in person, the beer’s on me.

The telemetry gathered by HAMs across the world has been extremely useful in our analysis of the spacecraft’s condition. I hope to be able to release, at least partially, the details of the format for the beacon string in a couple of days. In the meanwhile, we welcome any additional telemetry that you can send our way. Even information about the AOS/LOS has been very useful in trying to figure out where exactly the satellite is.

NORAD / celestrak has released 5 TLE’s tagged with the PSLV C-18 launch (2011-058<A-E>). We arent yet sure which one, if any, is Jugnu. We do know that SRMSat is one of the cluster of 3 objects (B,C,D). We’ve been able to recieve our beacon when we attempt to track C, but the signal strength is low and we generally see it clearly only near AOS. Due to reasons I’m probably not allowed to discuss in public, we have reason to believe that Jugnu is moving away from the other objects (SRMSat, VesselSat, and until later today, MT) at a velocity of approximately 1.5 to 3 meters per second since separation from LV. We expect this velocity to be tangential to the orbit. If you’re trying to track Jugnu, I would suggest that for the moment, C is a good starting point, and it may be better to track a little ahead of
it. We will be trying to do the same in some of the later passes ourselves.

In the case of SRMSat, we’ve had good signals at object B until earlier today, but we think that C did a better job of it in the last decent pass we had earlier this evening, about 6 hours ago.

I’d be more than delighted to try and answer any questions you may have about Jugnu, so please feel free to contact me on or off list if you would like to know more about it.

Thanks and Regards,

Chintalagiri Shashank

Head, System Integration and Electronic Hardware Design,
Jugnu Nanosatellite Project
Indian Institute of Technology, Kanpur
Email: shashank.chintalagiri at

JUGNU 437.275 MHz reports should be sent to

SRMSAT 437.425 MHz reports should be sent to KC2YQJ <at>

Note due to the 20 degree inclination orbit these satellites are not receivable in high latitude countries such as the United Kingdom.

Getting started on Amateur Radio Satellites PDF

Good signals received from SRMSAT and JUGNU

JUNGU on an AMSAT-UK FUNcube Dongle SDR

JUNGU received by N8MH on an AMSAT-UK FUNcube Dongle SDR

Radio Amateurs have been reporting good signals on 437.425 MHz and 437.275 MHz from the new Amateur Radio satellites SRMSAT and JUGNU.

Unfortunately due to the 20 degree inclination of the orbit hams in the United Kingdom are unable to hear them.

Mark Hammond N8MH reports on the FUNcube Yahoo group that he has been using his AMSAT-UK FUNcube dongle Software Defined Radio to receive signals from JUGNU.

Watch the lift off of SRMSAt and JUGNU on the PSLV-C18 launcher

Information on how to decode the telemetry from SRMSAT can be found at

JUGNU 437.275 MHz reports should be sent to

SRMSAT 437.425 MHz reports should be sent to KC2YQJ <at>

The Hindu launch report

JUGNU in The Economic Times

AMSAT Bulletin Board (AMSAT-BB)

Join the FUNcube Yahoo Group at

Launch of Indian Amateur Radio Satellites

Amateur Radio satellites SRMSAT and Jugnu launched Wednesday, Oct 12 at 05:32 UT and hams are asked to send in reception reports of the signals on 437.275 MHz and 437.425 MHz. A video of the launch can be seen at

These satellites were launched into a 20 degree inclination orbit so are not receiveable in high latitude countries such as the United Kingdom. See

On the AMSAT bulletin board Mani, VU2WMY, writes

I’m herewith forwarding the mail from Mr. Shantanu Agarwal, Team Lead for the ‘Jugnu’, requesting the Global Amateur Radio fraternity to provide the CW Beacon signal Report along with the plain decoded morse message, if possible.

Any help in this regard would be greatly appreciated, as this would be very helpful to evaluate various on-board system performance.

‘Jugnu’ beacon is at 437.275 MHz, OOK.

The reports can be sent to the following mail ID.s

The predicted TLE’s:

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
1 88888U 11072A   11278.34967500  .00001077  00000-0  60876-3 0  1233
2 88888  20.0603  97.4017 0010015 338.6461 208.4324 14.09199968    14

Thanks in advance and looking forward to your valuable reports.

Additional SRMSAT Information:
Telemetry downlink and CW beacon: 437.425 MHz (10 dbm)
Keps file:
Send SRMSAT reports to KC2YQJ <at>

AMSAT Bulletin Board (AMSAT-BB)

Getting started on Amateur Radio Satellites PDF

SRMSAT and JUGNU to launch October 12

SRMSAT Keps and Downlink Details

SRMSAT, a NanoSat developed by the students of SRM University, India will be launched on October 12, 2011 along with the Megha Tropique satellite on the PSLV-C18 launch vehicle from ISRO’s spaceport in Sriharikota, India.

On the AMSAT bulletin board Dinesh Cyanam KC2YQJ provides an update on SRMSAT:

Payload Details: SRMSAT will monitor the greenhouse gases in near infrared region (900nm – 1700nm).

Launch Date and Time: October 12, 2011 0530 hrs UTC

Telemetry down link and CW beacon on the same frequency: 437.425 MHz (10 dbm) (Telemetry decoding info will be posted soon)

Preliminary TLEs from ISTRAC (ISRO Telemetry, Tracking and Command Network):
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

Keps file:


All Radio Amateurs are requested to track SRMSAT and provide us with the reception reports via AMSAT-BB mailing list or via email to KC2YQJ <at>

AMSAT Bulletin Board (AMSAT-BB)

Getting started on Amateur Radio Satellites PDF
SRMSAT and JUGNU to launch October 12