AMSAT-UK

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HFsat will have 21 to 29 MHz transponder

Posted: 02 Nov 2016 12:44 PM PDT
https://amsat-uk.org/2016/11/02/hfsa...z-transponder/

HFsat concept of operations

US Naval Academy students are planning an amateur radio CubeSat HFsat
carrying an HF transponder as well as 2m APRS.

They are working with Bill N6GHZ on the HF transponder card which will
provide a bandwidth of 30 kHz, the frequencies are currently 21.4 MHz
uplink and 29.42 MHz downlink. Doppler shift will be reduced to less than 2
Hz per second by using an inverting transponder.

The satellite will be gravity gradient stabilized by its long full size 10
meter band halfwave HF dipole antenna with tip masses

Read more about HFsat at http://aprs.org/hfsat.html

IARU satellite frequency coordination page http://www.amsat.org.uk/iaru/

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UBAKUSAT linear transponder satellite

Posted: 02 Nov 2016 12:37 PM PDT
https://amsat-uk.org/2016/11/02/ubak...der-satellite/

UBAKUSAT Amateur Radio CubeSat

Turkeys 3U CubeSat UBAKUSAT carrying an amateur radio 145/435 MHz SSB/CW
transponder is planned to be deployed from the ISS in 2017.

The linear transponder is almost the same as that on the TURKSAT-3USAT
which was launched on April 26, 2013.
UBAKUSAT CubeSat

The satellite is being developed by Istanbul Technical University, Faculty
of Aeronautics and Astronautics, Space Systems Design and Test Lab (SSDTL)
along with TAMSAT, GUMUSH and ERTEK Ltd, with some support of the RF lab of
ITU (RFL) and Ministry of Transportation, Communication and Maritime in
collaboration with the Japanese Government.

The first ever CubeSat of Turkey, ITUpSAT1 was also successfully developed
by SSDTL. ITUpSAT1 was placed in a LEO orbit of 720 km, on September 23,
2009 by a PSLV rocket. Its beacon signals are still heard by amateur radio
stations worldwide.

The primary mission of UBAKUSAT is to provide voice communications for
amateur radio stations around the globe. Additionally the satellite will
carry the TAMSAT Simplesat card which will send telemetry data, including
the relative radiation data absorbed by the card, to ground stations. There
is also a CW beacon.

The satellite also contains typical subsystems that are required for its
successful operation: structure, EPS, batteries, solar panels, OBC, antenna.

The estimated duration of the satellite mission is about 6 to 12 months
before re-entry. The launch from Japan to the International Space Station
is planned for late 2016 or early 2017 and deployment from the ISS will
occur sometime later.

IARU coordinated frequencies:

• 437.225 MHz CW Beacon

• 437.325 MHz Telemetry

• SSB/CW transponder:

145.940-145.990MHz

435.200-435.250 MHz

IARU satellite frequency coordination pages http://www.amsat.org.uk/iaru/

Turkish Amateur Satellite Technologies Organization (TAMSAT)

http://tinyurl.com/TurkeyTAMSAT

https://www.facebook.com/tamsat.amsattr

https://twitter.com/tamsat_tr

http://www.youtube.com/user/tamsatvideo