Tag Archives: Ham Radio

Jan 31 2012

Video – Vega's First Launch Campaign

A time-lapse video is available of the first Vega launch campaign that began November 7, 2011 at the ESA Spaceport in Kourou. Vega will carry eight student built amateur radio satellites.

This time-lapse shows the full assembly of the first Vega launcher at the launch pad, in preparation for its qualification flight. It starts with the transfer and installation of the P80 first stage from the Vega Booster Storage and Preparation Building to the launch pad, followed by the two solid-propellant second and third stages, the Zefiro-23 and Zefiro-9. The next step was to add the AVUM — Attitude & Vernier Upper Module — liquid-propellant fourth stage to the vehicle. The ‘upper composite’ — the fairing and payload — was moved to the pad on January 24 and integrated over night.

Watch Vega’s First Launch Campaign

Vega Satellite Deployments http://www.uk.amsat.org/4235

Student Amateur Radio Satellites on Vega http://www.uk.amsat.org/4180

Vega Masa-1 Elliptical Orbit Video http://www.uk.amsat.org/4119

Jan 30 2012

Vega Satellite Deployments

Artists impression of Vega launch

Artists impression of Vega launch

Vega is presently scheduled to launch at 0900 UT on Thursday, Feb 9, with eight student built amateur radio satellites.

The launcher will first deploy the main payload,  the LARES the Laser relativity Spacecraft and will then make an additional firing of the final Attitude & Vernier Upper Module (AVUM) stage before deploying the secondary payloads. the planned timing for these deployments are as follows:

T0+ 4245.30secs first PPOD, with (in order of ejection) XatCobeo, e-st@r, and Goliat
T0+ 4255.30secs second PPOD, with (in order of ejection) Robusta, MaSat-1 and  PW-Sat
T0+ 4265.30secs third PPOD, with UniCubeSat only
These Cubesats will not deploy their antennas until >1800 seconds after they leave their PODS
T0+ 4275.30secs  AlmaSat-1 – it is not known how soon this spacecraft will start transmitting after deployment

Pre-launch TLEs have not yet been made available but all the teams will certainly appreciate reception reports on the day. All observers are being encouraged to join the CubeSat IRC chat channel to pass on their news and comments in realtime. Using the irc.freenode.net server please join the #cubesat channel. It is recommended that you change you nickname to “name_callsign”.

For frequencies of the eight student amateur radio satellites to be deployed by Vega see http://www.uk.amsat.org/4180

Vega Elliptical Orbit Video http://www.uk.amsat.org/4119

Jan 30 2012

Working the FM-Sat SO-50

Saudisat SO-50

Saudisat SO-50

Simon 2E0HTS has released a video that shows him making contacts via the amateur radio satellite SO-50.

This satellite carries an FM transponder that receives signals on 145.850 MHz and retransmits them on 436.795 MHz (+/- 10 kHz Doppler shift). Operation is a little more complex that some other satellites since the transponder needs to initially be activated by a CTCSS (PL) tone of 74.4 Hz which starts a 10 minute timer and then a 67 Hz tone is used for the contact.

The order of operation is: (allow for Doppler as necessary):
1) Transmit on 145.850 MHz with a tone of 74.4 Hz to arm the 10 minute timer on board the spacecraft.
2) Now transmit on 145.850 MHz (FM Voice) using 67.0 Hz within the 10 minute window.
3) Sending the 74.4 Hz tone again within the 10 minute window will reset the 10 minute timer.

You can set the memory channels in your handheld as follows:
Ch     TX              RX            CTCSS
1     145.850     Timer Reset 74.4 Hz
2     145.850     436.805       67 Hz
3     145.850     436.800       67 Hz
4     145.850     436.795       67 Hz
5     145.850     436.790       67 Hz
6     145.850     436.785       67 Hz
At the start of the pass tune to 436.805 and then decrease the frequency during the 10+ minute pass.

Watch Simon 2E0HTS working CT2GOY, F0FVK, SP5XSD & EA6SW/portable 6, via SAUDISAT 1C SO-50

Simon 2E0HTS Ham Radio Operator Blog http://www.hamradiooperator.blogspot.com/

You can read Howard G6LVB’s SO-50 article at http://www.g6lvb.com/Articles/operatingSO50.htm

SO-50 http://www.amsat.org/amsat-new/satellites/satInfo.php?satID=4

N2YO Real Time Satellite Tracking http://www.n2yo.com/

Satscape Satellite Tracking Software http://www.satscape.info/home/?q=node/2

John Heath G7HIA’s article  ‘Getting started on amateur radio satellites’ can be downloaded from http://www.uk.amsat.org/267

Jan 28 2012

CUSat-1/2 to launch on SpaceX

CUSat-1/2

The IARU amateur satellite frequency coordination panel have agreed frequencies for CUSat-1/2, planned to launch on a SpaceX mission in the last quarter of 2012.

CUSat-1/2 is a 45kg satellite that will split into two parts sometime after separation from the launcher. Image and positioning data will be downlinked using 9k6 AX25 packet on 70cm from a 2 watt transmitter. Cross linking between the two parts will also take place on 70cm.

The coordinated frequencies are:
– CUSat-1   437.405 MHz
– CUSat-2   437.485 MHz
– Cross link 437.305 MHz

Using centimeter accuracy carrier-phase differential GPS, the two satellites will perform autonomous relative navigation. One satellite will capture imagery of the other satellite and send these images to a ground station on Earth for the reconstruction of a 3-D model of the partner satellite. The images will also act to verify the relative GPS implementation. Doing so will demonstrate how one spacecraft can diagnose the structural health and configuration of another.

CUSat http://cusat.cornell.edu/

Jan 28 2012

Masat-1 Elliptical Orbit Video

Artists impression of Vega launch

Artists impression of Vega launch

Vega is planned to launch on February 9 from the ESA launch site at Kourou in the Caribbean. It will carry seven amateur radio CubeSats and an amateur radio Microsatellite called ALMASat.

This HD clip shows how one of those CubeSats, Masat-1 (437.345 MHz), is going to orbit around Earth. You can see the satellite establishing contact with the primary ground station at BME, joined by the radio amateurs in Europe and all over the World. The radio contact is possible only if the satellite is above the Horizon at the given location. This is symbolized with thin green lines between the satellite and the ground stations, represented by coloured dots on the Globe.

Everybody is welcome to join in recieving the satellite using the ground station software freely downloadable from the Masat-1 website!

Watch Masat-1 Elliptical Orbit and Pass over European Ground Stations

The Masat-1 Ground Station Client Software was prepared to process the 437.345 MHz GFSK 625/1250 bps transmission received from the satellite Masat-1. The software provides the following functions:

– Audio demodulation
– Packet decoding
– Packet data visualization
– Frequency waterfall plot to aid radio tuning

Download the software and a test WAV file from http://cubesat.bme.hu/en/foldi-allomas/kliens-szoftver/

Frequencies and links for the amateur radio satellites on Vega are at http://www.ne.jp/asahi/hamradio/je9pel/esa9cubf.htm

IARU Amateur Satellite Frequency Coordination pages http://amsat.org.uk/iaru/

Jan 26 2012

2E0HTS Working the OSCAR-7 Satellite

A video from Simon 2E0HTS shows him working F6HRO and DG1EA via the amateur radio satellite OSCAR-7 which was launched in 1974.

His new assistant is showing good radio com skills especially rotating and elevating the satellite antennas.

Watch Simon’s video – AO-7 Satellite QSO (with a little help from my new radio partner)

Simon 2E0HTS Ham Radio Operator Blog http://www.hamradiooperator.blogspot.com/

Working the SSB satellites http://www.uk.amsat.org/2712