Tag Archives: Ham Radio

Mar 14 2012

HAMSAT VO-52 Dutch Transponder Activated

VO-52 on FUNcube Dongle by Dave G4DPZ

VO-52 received on an AMSAT-UK FUNcube Dongle by Dave Johnson G4DPZ during the 17:27 pass on March 14, 2012

The Dutch SSB/CW linear transponder on the AMSAT-India amateur radio satellite HAMSAT VO-52 has been successfully activated.

Transponder # 1, which had been operating for over 6 years, fell silent on February 28 and efforts have been underway to activate transponder # 2.

Mani VU2WMY reports that the commands to ‘Turn On’ the transponder # 2 on-board HAMSAT VO-52 were successfully sent on March 14 during the 1400 UT 35 deg ascending Node pass over Bangalore, India.

The commands were successful and the CW message beacon of the Dutch transponder # 2, built by William Leijenaar PE1RAH, was heard in Bangalore loud and clear, some 6 years and 4 months since it was last switched on.

The Dutch SSB/CW transponder uses these frequencies:
Uplink:         435.2250 – 435.2750 MHz SSB/CW
Downlink:     145.9250 – 145.8750 MHz SSB/CW
Beacon:       145.8600 MHz CW

When working through linear transponder satellites such as VO-52 use as little power as possible, this will help extend the lifetime of the transponder and satellite batteries. As a guide ensure your downlink signal is no stronger than the satellite beacon. Low duty cycle modes such as SSB and CW are recommended.

How to work the SSB satellites such as VO-52 http://www.uk.amsat.org/2712

AMSAT-India Thanks You http://www.uk.amsat.org/5777

HAMSAT VO-52 Activation Planned For Wednesday http://www.uk.amsat.org/5685

HAMSAT VO-52 Falls Silent http://www.uk.amsat.org/5217

Leijenaar Electronics http://www.leijenaarelectronics.nl/

AMSAT-India http://www.amsatindia.org/

Mar 14 2012

HAMSAT VO-52 Activation Planned For Wednesday

HAMSAT VO-52

HAMSAT VO-52

Mani VU2WMY reports that due to ‘Operational Constraints’ the commands to turn on the Dutch SSB/CW transponder on HAMSAT (VO-52) could not be sent on Tuesday and attempts at 01:44 UT and 03:20 UT Wednesday were unsuccessful.

The next attempt will be made during the 14:00 UT pass over India.

William Leijenaar PE1RAH, designer and builder of the Dutch SSB/CW linear transponder on HAMSAT (VO-52), requests reports when the transponder is activated. He says:

! ! !  Please don’t use high uplink powers !!! (We don’t want it to rise temperature very fast just after cold switch on) ! ! !

Please listen for the CW beacon at 145.860, which is a good reference.
(Audio records and reports are very welcome at ISRO and myself)

73 de PE1RAH,
William Leijenaar

The frequencies used will be:

Uplink:         435.2250 – 435.2750 MHz SSB/CW
Downlink:     145.9250 – 145.8750 MHz SSB/CW
Beacon:       145.8600 MHz CW

How to work the SSB satellites http://www.uk.amsat.org/2712

HAMSAT VO-52 Falls Silent http://www.uk.amsat.org/5217

Leijenaar Electronics http://www.leijenaarelectronics.nl/

AMSAT-India http://www.amsatindia.org/

Mar 13 2012

New Amateur Satellite Frequency Coordination Request Form

Hans van de Groenendaal ZS6AKV

Hans van de Groenendaal ZS6AKV

IARU Satellite Advisor Hans van de Groenendaal ZS6AKV has made available a new version of the Amateur Satellite Frequency Coordination request form.

Frequency coordination for amateur radio satellites is provided by the IARU through its Satellite Advisor, an official appointed by the IARU Administrative Council, its top policymaking body.

The IARU Satellite Advisor is assisted by an Advisory Panel of qualified amateurs from all three IARU Regions. The panel meets regularly via Skype to consider amateur satellite frequency coordination requests for satellites planned for operation on frequencies in the amateur service. The panel members often provide advice and assist satellite builders with the selection of   the best possible frequencies to meet the objectives of their mission.

The Amateur Satellite Frequency Coordination request form has been updated (Version 27) and is available for download from http://www.iaru.org/satellite.

On the IARU web satellite page there are also available a number of guideline documents which will assist satellite builders, including a document on the ITU requirements for Amateur Radio Satellites.

73

Hans van de Groenendaal ZS6AKV
IARU Satellite Advisor

A list of coordinated amateur radio satellites can be found at http://www.amsat.org.uk/iaru

Mar 12 2012

GOMX-1 to test CubeSat Space Protocol

GOMX-1 is a student built amateur radio 2U CubeSat. The mission is being flown under the auspices of a Government research grant covering space related radio research. It will qualify a number of subsystems and provide extensive in-flight data.

A large number of future amateur/educational CubeSat missions depend on the important data that will be generated by this mission. This will help these mission teams across the globe to achieve higher reliability and improved utilization.

The mission will also test the use of the open source Cubesat Space Protocol (http://code.google.com/p/cubesat-space-protocol/) for a complete mission including the space link.

A camera payload will take color images of the Earth and an experimental Software Defined Radio receiver will be carried and its performance characterized.

More than 15 students at Aalborg University have been actively involved in the development of this payload as part of their semester projects.

It is planning to use GMSK telemetry with selectable 1k2/2k4/4k8/9k6 rates on UHF with approx 28dBm power to a deployed antenna. Launch is expected in late 2012 into a near sun syncronous orbit on a DNEPR rocket from Yasny in Russia with a number of other amateur radio satellites,  see Gunter’s Space Page http://space.skyrocket.de/doc_chr/lau2012.htm

GOMspace http://gomspace.com/

Mar 11 2012

Howard Long G6LVB featured speaker at AMSAT/TAPR Banquet

Howard

Howard Long G6LVB

The AMSAT/TAPR Banquet on Friday night, May 18 is one of the main AMSAT activities during the 2012 Hamvention at Dayton.

AMSAT-NA is pleased to announce that Howard Long G6LVB will be the featured speaker for the evening event. Howard will be talking about his  FUNcube Dongle, the 64 – 1700 MHz Software Defined Receiver.

This innovative USB device is the size of a thumbdrive and has an SMA antenna socket. Multiple SDR control and display software programs can be used with the FUNcube Dongle.

Banquet tickets will not be sold at the AMSAT booth during the Hamvention so reservations must be made through the AMSAT-NA Store http://www.amsat-na.com/store/item.php?id=100158
Tickets are $30 apiece.

Thanks to Gould Smith, WA4SXM for the above information

Mar 11 2012

Radio Amateur Encourages Engineering as a Career

Ali Guarneros Luna KJ6TVO has been involved in the development of the amateur radio CubeSat TechEdSat. In this video she talks to teenagers at a Careers Night about her aspiration to become an engineer.

Watch Career Night – Ali Luna

Ali Guarneros Luna KJ6TVO was born in Mexico City and now lives in San Jose, California. She received her BS in Aerospace Engineering at San Jose State University in 2010 and will complete her MS in Aerospace Engineering from San Jose State University in 2012.

She currently works with the Edison Program, Small Spacecraft Payload and Technologies (SSPT) and SPHERES National Lab at NASA Ames Research Center. Under the Edison Program, Ali works on development of CubeSat projects, including TechEdSat, as the System Engineering, Mission And Ground Operations, and Launch Vehicle Service expert.

Under the Small Spacecraft Payload and Technologies Program, Ali works as Engineering Support for different missions, most currently in NLAS. At SPHERES National Lab, Ali works as Engineer support for Ground Lab and Operation Support.