Amateur Space Communication Talks at RSGB Convention

Professor Cathryn Mitchell M0IBG University of Bath

Professor Cathryn Mitchell M0IBG University of Bath

There is an impressive line-up of speakers for the RSGB Convention, taking place in Milton Keynes Oct 7-9, and amateur space communications feature prominently.

Presentations during the weekend include:
• Sat 10:45 The new world of amateur satellites by Graham Shirville G3VZV
• Sat 12:00 Try amateur satellites by Peter Goodhall 2E0SQL
• Sat 14:40 Inspiring the next STEM generation 10 amateur radio contacts with Tim Peake GB1SS by Ciaran Morgan M0TXD & Susan Buckle UK Space Agency
• Sat 15:45 Making the Tim Peake GB1SS contacts a reality by Graham Shirville G3VZV & Noel Matthews G8GTZ
• Sun 13:30 Space Weather by Prof. Cathryn Mitchell M0IBG

The full schedule and booking information are available on the RSGB Convention page at http://rsgb.org/convention

Twitter #RSGBconv2016

Balloon FM Transponder Launch

a-dutch-balloon-launchAt around 1100 GMT on Sunday, Sept 11, a Dutch High Altitude Balloon will launch with a UHF/VHF FM transponder, 23cm ATV transmitter and beacon, the range should be over 500 km.

The weather balloon will be launched from the Netherlands, amateur radio stations in nearby countries have to wait a while to hear the signals until the balloon reach a higher altitude! (the maximal altitude might reach 30km it also did in the past!).

Balloon transmitters frequency information:
Beacon:  145.450 MHz (100 mW FM/N).
FM crossband voice transponder uplink: 432.550 MHz downlink: 145.475 MHz (1 Watt FM/N).
ATV video transmitter 1252 MHz (1 Watt FM, camera looking down to earth).
The balloon camera video stream can be world wide seen on the website (see the urls below).

Ground control stations:
PI4RCG      7.080 kHz, 3.650 kHz (+/- 10kHz QRM).
PI2NOS    430.125 MHz (+1.6 Shift) ground repeater in the Netherlands (also audible via echolink).
PI3UTR    145.575 MHz (-0.6 Shift / 77Hz) ground repeater in the Netherlands (also audible via echolink).

The official balloon fox hunt website and social media websites:
http://www.pi6atv.com/ live video from the balloon camera
https://www.ballonvossenjacht.nl (you can choose the English language from the menu).
http://www.facebook.com/ballonvossenjacht
https://twitter.com/ballonvosjacht (often with quick update news messages!).

73’s Cor PD0RKC

Pratham student satellite

SolidWorks rendering of the Pratham satellite - Credit IIT Bombay

SolidWorks rendering of the Pratham satellite – Credit IIT Bombay

The satellite Pratham built by students at the Indian Institute of Technology Bombay is expected to launch on the Indian PSLV-C35 mission planned for 0342 UT on Monday, September 26, 2016.

Pratham, a 300x300x300mm satellite with a mass of 10 kg, aims to measure total electron count in a 800 km altitude Sun Synchronous Orbit (SSO).

Aayush Yadav of the Pratham team writes:

We, students of IIT Bombay, are glad to inform you that our project, Pratham, is ready and expected to launch with PSLV-C35. We would be really happy if  you all joined us in receiving our satellite’s beacon, details given below:

The beacon is estimated to switch on in the window of 25-30 degrees North and 4-8 degrees East as per the current TLE’s. Once switched on, it will remain so through out it’s orbit. The telemetry data will be switched on only over Europe (France) and India because of our power constraints. If you could, please receive the beacon and/or telemetry of the satellite and report back to the mail id’s as given below. The information for the satellite transmissions is given below,

Beacon:
Frequency: 145.980 MHz
Modulation: CW
Words per minute: 30
Power Emitted: 0.2 W (23 dBm)

Telemetry: To be switched on only over India and Europe (France)
Frequency: 437.455 MHz
Modulation: FSK
Rate: 1200 bps
Power Emitted: 0.06 W (18 dBm)

Pratham Initial KEPS / TLE 
1 99999U 16005A  16270.24769735  .00000368  00000-0  70534-4 0  1235
2 99999 98.2056 327.8012 0027951 267.5222 9.4278 14.63691895 13

Kind Regards.
Team Pratham

Further information at http://www.aero.iitb.ac.in/pratham/

Facebook https://www.facebook.com/iitb.student.satellite/

Twitter https://twitter.com/SatlabIITB

5 GHz to 10 GHz Lunar Transponder Mission

View of Earth from the Moon AdobeStock_77398324AMSAT-NA plans 5 GHz to 10 GHz transponders on a spacecraft expected to launch in September 2018 into a Lunar orbit.

Heimdallr is a 3 axis stabilized 6U CubeSat with a mass of approximately 8 kg. It will have a Cold Gas Thruster for inertia dump and a star tracker for navigation. Deployable, gimbled solar panels will produce up to 100 watts of DC power, electric propulsion will be used to achieve lunar orbit.

There will be a combination of omni and directional patch antennas on one side of spacecraft.

The first part of mission is to provide Telemetry, Tracking, and Command (TT&C) to obtain lunar orbit. The second part is to perform the data downlink experiment while the final part is to provide a two way regenerative repeater and analog repeater in lunar orbit for lifetime of satellite.

Proposing these downlinks:
• Omni transponder: 10.451 GHz +/- 0.5 MHz
• Directional transponder: 10.4575 GHz. +/- 3.5 MHz
• Analog transponder: 10.4665 GHz. +/- 2.0 MHz

For the first part of the mission (TT&C) using 300 bps BPSK 1/2 rate viterbi Ranging 1.5 Mbps BPSK DSSS. For the  second part of mission 4.5 Mbps QPSK ½ rate DVB-S2. For the final part of mission 25 kbps BPSK 1/5 rate DVB-S2.

Proposing these Uplinks
• Omni transponder: 5.651 GHz +/- 0.5 MHz
• Directional transponder: 5.6575 GHz. +/- 3.5 MHz
• Analog transponder: 5.665 GHz. +/- 2.0 MHz

A link budget is available at
https://drive.google.com/folderview?id=0B3u-mSOWBMISYnZyZGJpeThKeU0&usp=sharing

It is anticipated that a 1 or 2 metre dish will be required using the AMSAT designed ground station equipment.

Source IARU Satellite Frequency Coordination Status pages http://www.amsat.org.uk/iaru/

Heimdallr satellite – 5 Teams Share First Round of NASA CubeSat Prizes
http://spacenews.com/5-teams-share-first-round-of-nasa-cubesat-prizes/

 

Video of Portable Satellite Operation Talk

Peter Goodhall 2E0SQL with portable satellite antennas

Peter Goodhall 2E0SQL with portable satellite antennas

Peter Goodhall 2E0SQL, well known for satellite operating from remote Scottish Islands and the Channel Islands, gave a presentation titled ‘Satellite Operations in the Field’ to the 2016 AMSAT-UK International Space Colloquium.

The talk explores experience gained from 5 years of satellite operations from Scottish Islands (Isle of Arran, Mull & Lewis) and the Channel Islands (Guernsey), looking at equipment from using simple handheld equipment to fully automated stations, techniques and issues experienced along the way.

Thanks to volunteers from the British Amateur Television Club (BATC) the presentation has been made available on YouTube.

Watch Satellite Operations in the Field by Peter Goodhall 2E0SQL

AMSAT-UK Space Colloquium Videos Now Available https://amsat-uk.org/2016/08/03/space-colloquium-videos/

The book – Getting Started with Amateur Satellites – is now available from the AMSAT-UK shop at http://shop.amsat-uk.org/

A popular antenna for satellite working is the Elk 2m/70cms Log Periodic available in the AMSAT-UK shop at http://shop.amsat-uk.org/ELK_2m70cms_Log_Periodic_Antenna/p3815740_15628555.aspx

UK CubeSat Forum – Lunar opportunity

View of Earth from the Moon AdobeStock_77398324Surrey Satellite Technology Ltd (SSTL) and Goonhilly Earth Station (GES) are looking for CubeSat passenger payloads on a Lunar mission.

SSTL and GES are teaming up with ESA to create the world’s first commercial deep space mission. They plan to carry customer payload in the form of CubeSats into lunar orbit and provide the relay link back to Earth via Goonhilly. The launch is planned for 2019.

Orbital passengers e.g. nanosatellites and CubeSats will be deployed from the Mothership and will operate in lunar orbit.

The UK CubeSat Forum can help in creating new contacts for joint proposals, so do post on their site should you want to be involved!
http://www.cubesatforum.org.uk/wordpress/2016/08/30/call-for-lunar-missions-payloads/

Twitter: https://twitter.com/UKCubeSatForum

Download the related documents from http://www.goonhilly.org/lunar