Taurus-1 with Codec-2 transponder launched

Taurus-1 with solar sail deployed

Taurus-1 with solar sail deployed

Taurus-1 (Jinniuzuo-1) carrying an amateur radio FM to Codec-2 transponder was launched on a CZ-4B rocket from the Taiyuan Satellite Launch Center on Thursday, September 12 at 0326 GMT.

Taurus-1 is a CubeSat project developed by Aerospace System Engineering Research Institute of Shanghai for youth education and amateur radio.

The transponder is similar to that used on LilacSat-1 receiving FM with 67 Hz CTCSS on 145.820 and retransmitting it as Codec-2 9600 bps BPSK digital voice along with the telemetry data on a nominal frequency of 435.840 MHz +/-10 kHz Doppler shift.

On Friday, September 13, Mark Jessop VK5QI tweeted:
“Good signals from #Taurus-1 on 435.840 MHz! Doesn’t look like the FM/Codec2 Transponder is enabled yet though (no response on 436.760 MHz when transmitting on 145.820 MHz)” Note: this was sent before it was realized Codec2 voice and the telemetry were on the same frequency.
https://twitter.com/vk5qi/status/1172505034551988225

Taurus-1 beacon received by Mark Jessop VK5QI

Taurus-1 beacon received by Mark Jessop VK5QI

Codec2 9600 bps BPSK Downlink information by Daniel Estévez EA4GPZ
https://destevez.net/2016/10/lilacsat-1-codec-2-downlink/

Adam Whitney K0FFY documented how to receive the similar Codec2 Digital Voice transponder originally flown on LilacSat-1 using the FUNcube Dongle Pro+ SDR
http://adamwhitney.net/working-lilacsat-1/

A paper by Paul Stoetzer N8HM on the FM-Code2 transponder is at
https://www.amsat.org/wordpress/wp-content/uploads/2019/03/N8HM_LilacSat_LO-90.pdf

Nico Janssen PA0DLO reports the actual telemetry downlink frequency is 435.8387 MHz and Doppler measurements show that Taurus 1 is object 44530 (2019-059C).

Keplerian Two Line Elements (TLEs) ‘Keps’ for new satellites launched in past 30 days
http://celestrak.com/NORAD/elements/tle-new.txt

LilacSat-1 CubeSat deployed from ISS

Students installing antennas at BY2HIT

Students installing antennas at BY2HIT

The student built LilacSat-1 carries an amateur radio 145/436 MHz FM to Codec2-BPSK digital voice transponder, APRS Digipeater and camera.

Image of ISS Solar Panels taken by LilacSat-1 just after deployment

Image of ISS Solar Panels taken by LilacSat-1 just after deployment

The satellite was developed at the Harbin Institute of Technology and is part of the QB50 mission which aims to study the lower thermosphere. It was deployed from the International Space Station at 0835 GMT on Thursday, May 25, 2017.

Shortly after deployment LilacSat-1 took a picture of the solar panels on the ISS. The image was downloaded by the students on 436.510 MHz +/- 10 kHz Doppler Shift using 9600 bps BPSK.

The FM to Codec2-BPSK transponder was activated late afternoon GMT on Thursday, May 25:
• FM Uplink 145.985 MHz with 67 Hz CTCSS (PL Tone)
Codec2 9600 bps BPSK Downlink 436.510 MHz

The first contact using the Codec2 transponder took place on May 31 between Mike Rupprecht DK3WN and John Grant GI7UGV http://www.dk3wn.info/p/?p=79889

LilacSat-1 radio information is at http://lilacsat.hit.edu.cn/?page_id=594

Adam Whitney K0FFY has documented how to receive the LilacSat-1 Codec2 Digital Voice transponder using the FUNcube Dongle Pro+ SDR http://adamwhitney.net/working-lilacsat-1/

M6SIG live CD for LilacSat 1 and 2
http://chertseyradioclub.blogspot.co.uk/2017/06/m6sig-live-cd-for-lilacsat-1-and-2.html

Lilacsat 1 and 2 decoder now available on Experimental Raspberry Pi (3) image with GNU radio / gr-lilacsat
http://chertseyradioclub.blogspot.co.uk/2017/06/lilacsat-1-and-2-decoder-now-available.html

LilacSat-1 Codec2 downlink by Daniel Estévez EA4GPZ / M0HXM
http://destevez.net/2016/10/lilacsat-1-codec-2-downlink/

Updated LilacSat-1 Live CD from M6SIG latest link at http://lilacsat.hit.edu.cn/?page_id=594

The main payload is an ion and neutral particle mass spectrometer (INMS) developed by the University of London (UCL) to measure the mass and distribution of charged and neutral atoms.

LilacSat-1 signal received by JA0CAW

LilacSat-1 signal received by JA0CAW

In preparation for the deployment HIT students installed new VHF and UHF antennas for the ground station.

Harbin Institute of Technology Amateur Radio Club BY2HIT
http://www.by2hit.net/
http://weibo.com/by2hit/
http://www.qsl.net/by2hit/
https://www.qrz.com/db/BY2HIT

LilacSat-1 page (use Google translator) http://lilacsat.hit.edu.cn/?page_id=143

QB50 LilacSat-1 information https://upload.qb50.eu/detail/CN02/

IARU information http://www.amsatuk.me.uk/iaru/finished_detail.php?serialnum=343

Keplerian Two Line Elements (TLEs) ‘Keps’ for new satellites launched in past 30 days
http://celestrak.com/NORAD/elements/tle-new.txt

LilacSat-1 CubeSat

LilacSat-1 CubeSat