OSSI CubeSat – Ground Station Video

Hojun Song with Hannes Gassert wearing OSSI GS Backpack

Hojun Song with Hannes Gassert wearing OSSI Ground Station Backpack and holding a Yagi antenna

Korean artist Hojun Song DS1SBO has made available videos showing the construction of his satellite OSSI.

In addition to radio communications (145 MHz uplink, 435 MHz downlink) OSSI is fitted with LED’s that can flash in Morse Code and is also flying Super-Capacitors.

The backpack ground station that he’s developed features a novel fold up antenna.

OSSI will take off on a Soyuz rocket from Baikonour in Kazakhstan this August.

Watch Setting up the OSSI Satellite Ground Station

 The OSSI ground station has been delivered to etoy. etoy is art and invests all resources in the production of more art, see http://www.etoy.com/

OSSI carries LED’s that can signal in Morse Code

Watch Building the Onboard Computer (OBC)

OSSI Art CubeSat to Launch in August http://www.uk.amsat.org/6993

Funds have been raised by selling T-shirts

Glasgow school wins CanSat launch competition

The UK’s Alpha team from Bearsden Academy in Glasgow were awarded first place in the second European CanSat Competition. 14 secondary school teams, from different ESA member states, participated in the finals of the competition at the Andøya Rocket Range in Norway.

The first prize was awarded to team Alpha, from the UK. Credits: ESA / J Makinen. (JPG, 61 Kb) CanSats are miniature simulation satellites the size of a soda can. The students had to build their own space experiments, fitting all the major subsystems including radio communications on 433/434 MHz and power into just 350ml.

The tiny CanSats were designed to separate from their rocket and conduct their missions as they descended on parachutes to the ground for recovery by the teams. They were launched in pairs from seven small Intruder rockets up to an altitude of about 1km.

Setting up an Intruder rocket for launch. Credits: ESA / J Makinen. (JPG, 68 Kb) Despite very strong winds, all of the CanSats were successfully recovered, with the exception of the Spanish one, which failed to communicate with the ground station.

The UK team received good telemetry data on 434.25 MHz, but were a little disappointed that their miniature rover deployed earlier than planned. The other teams, from Denmark, Belgium, the Netherlands, France, Spain, Austria, Czech Republic, Norway, Romania, Italian, Irish, Greek, Portugese had varying degrees of success.

Once they analysed the results of their missions, the teams were judged by a board composed of technical experts from space agencies and industry. Following the UK team in second place was the Icaromenippus 3D team from the 3rd General Lyceum of Mytilini, Strati Myrivili, Greece, with the Portuguese Azorean Shearwater team from EBS Santa Maria, Vila do Porto in the Azores in third place.

“The standard of the projects was really high and the judges were very impressed by the professional attitude of the students,” said Helen Page, the ESA CanSat Project Coordinator. “They learned an enormous amount about space science, engineering and technology, as well as developing practical skills and experiencing the excitement of a launch campaign at a world-class rocket range.”

Students from the Norwegian team Navican testing their CanSat's parachute. Credits: ESA / J Makinen. (JPG, 72 Kb) The 2012 European CanSat competition was organised by ESA’s Education Office in collaboration with the Norwegian Centre for Space-related Education (NAROM). For more details about the teams involved visit the ESA website.

The Scottish CanSat Competition was organised using the STEM Ambassador Network, a list of the Scottish schools involved and 70cm frequencies is at
http://www.fistraltraining.co.uk/index.php?option=com_content&view=article&id=126&Itemid=75

Scottish CanSat Facebook http://www.facebook.com/pages/Scottish-Cansat-Competition/136524309785701

CanSat website http://cansat.eu/

Atlas V Launches AEHF-2 Satellite For Classified U.S. Messages

A United Launch Alliance Atlas V carries a U.S. Air Force/ Lockheed Martin AEHF spacecraft to orbit. The AEHF-2 satellite will carry the most highly-classified U. S. satcom traffic. This flight marks the 30th successful Atlas V mission; the launch vehicle has a 100 percent success record. Photo Credit: Alan Walters/awaltersphoto.com

 

The second U.S. Air Force Advanced Extreme High Frequency (AEHF) communications spacecraft was successfully launched into a super synchronous transfer orbit May 4 atop a United Launch Alliance (ULA) Atlas V 531 rocket.

Liftoff of the 197 ft. tall 2.7 million lb. thrust vehicle from Launch Complex 41 at Cape Canaveral Air Force Station occurred at 2:42 p.m. EDT.

“The 13,600 lb. satellite cost $1.7 billion”,  said USAF Capt. John Francis, the AEHF project lead in charge of Operations and Sustainment. This makes it one of the most expensive military spacecraft ever launched from Cape Canaveral. The first AEHF spacecraft launched in August 2010 also cost $1.7 billion.

“The AEHF satellite series is the most sophisticated military communications system ever built and it will be a integral part of our national space security architecture,” said Steve Tatum, Lockheed-Martin’s Communications Director.

Three Aerojet solid rocket boosters along with the Russian-built RD-180 engine send out a massive plume of fury as the Atlas V 531 roars into Florida’s blue sky. Photo Credit: Jeffrey J. Soulliere

 

“We’re extremely pleased and excited with today’s launch,” said USAF Capt. Francis. “We have a big AEHF-2 team and it all culminated today,” he said.  It’s kind of like the Super Bowl – and we just scored the winning touchdown.”

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ISS Symposium 2012: A Personal Reflection

ISS Model at the 2012 ISS Symposium

Andy Thomas G0SFJ was invited to attend the ISS Symposium 2012, organised by ESA and DLR in Berlin on May 2-4. This is his personal reflection of the event. Official highlights are on their own website, Twitter, YouTube etc.

It’s impossible to single out any particular speaker, so I’d like to give only an account of some things that resonated with my own amateur experience.

Dr Julie Robinson ISS Programme Scientist at NASA - Image Credit ESA

I was very pleased to see in an early presentation by Julie Robinson the images of both “ends” of an ARISS contact, and equally it was heartening to see in the NASA “Assembly complete edition of the Reference Guide to the ISS” on page 95, Communications, a diagram in which we see  “Ham radio transmits directly to the ground”. The theme of engagement with young people was a constant throughout the Symposium with many references to them being inspired by astronaut/cosmonaut contacts, and I felt that ARISS was recognised as an important programme in this, hence my invitation described on my label , amongst the space professionals, as “Radio amateur -G0SFJ”.

Roscosmos/ TsNiiMash also referred to the Shadow experiment which relies on sending a beacon or “Mayak” signal from the ISS and received on Earth by us hams – and as a participant I talked with TsNiiMash delegates about that – and illustrated their presentations with Chiblis-M and with the MAI SSTV experiment. And the 3D journey in an adjoining salon visited the antennae on the Columbus module, both in simulation and in a real 3D picture!

Over dinner I discussed my personal view that some of us as hams would like to see more contacts of opportunity with the crew as time allowed, and I also described our work in receiving and passing on CubeSat data. There was a view expressed that CubeSats’ reliance on COTS radio equipment did not always teach much about radio, and student CubeSat projects did not always lead to the next level of bigger and more complex space equipment. I was interested in this common problem between space science and ham radio, of getting young people involved, in this age of throwaway mobile phones and laptops. I was a little surprised that some German delegates I spoke to did not know of the work of the ISEI in Leipzig and the Kosmonautenzentrum in Chemnitz, who both stimulate young people into space exploration in their own ways, and I think the people who do this good work should enjoy a higher recognition.

Many presentations demonstrated the utility of space-generated data to Earth based problems, and a good example came from the reinterpretation of data taken on salt consumption by Sigmund Jähn on an Intercosmos flight in 1978. It was both interesting and disturbing to see that bone tissue had not regrown to pre-flight levels in many long duration astronauts and cosmonauts. Visual problems were also becoming obvious.

ISS Symposium 2012 exhibition - Image credit ESA

The debate extended beyond the current use of the ISS into the future of space exploration, Waleed Abdalati giving an inspirational speech about the future. Essentially our sphere of action extends only to the asteroid belt. From the floor I asked the symposium a question of medical ethics, whether the Mars crew should be a younger or an older crew. As I recall, Chiaki Mukai immediately picked up on “Because of the radiation!” and the panel agreed with her and with psychologist Peter Suedfeld, who said that life taught many experiences in problem solving, that an older crew – by which I think we meant over about 55 – would be the ones who should go. Oleg Orlov from IBMP in Moscow concurred. Later, when Charles Bolden spoke about the US commitment to a manned flight to Mars in 2030, I fell to thinking that the US crew who would go would be currently Astronauts aged about 40. That is my personal conclusion. Bolden added in his speech “- and comes back to Earth and has lost his vision. Should we be thinking of that? I think we should be thinking of that”. There is no doubt in my mind that a manned expedition to Mars is not yet possible and Bolden said we also had to look at new ways of communications in working up to it. Interesting that in discussions over dinner, AMSAT-DL’s proposed satellite mission to Mars, the dish at Bochum and the possible use of a 30 m dish elsewhere was also recognised as a potential contributor.

It seemed evident to me, too, that the compromises inherent in the design of the ISS were beginning to show. Roscosmos emphasised their interest in flying a separate vehicle unattended by humans except at the beginning and end of its experiments, in order to take away the minimal disturbances describes by Bolden as “some astronaut jumping about on a treadmill”, but also I think attitude changes in pitch, roll and yaw, which are corrected for to an extent in experiments, are also a potential problem to zero gravity experiments such as crystal growth or metallurgy. And it was evident to me that the data on ozone depletion by a JAXA experiment SMILES only touched the edges of the problem region due to the ISS inclination of 51.6 degrees.

The “elephant in the room” was China – there is no possibility of her joining any current space treaty as a nation. However I fell to wondering whether her commercial interests might not find a locker in the new commercial availability of experimental space on board the ISS – money talks – we shall see.

I stress all the above is my personal observation, opinion and commentary, one day after the end of the conference.

The Symposium was very stimulating and enjoyable, and I’d like to thank ESA and the organisers for inviting me.

73 de Andy G0SFJ

ESA ISS Symposium Blog http://blogs.esa.int/iss-symposium2012/

ISS Symposium 2012 http://www.isssymposium2012.com/

Research Overview of the International Space Station Partnership http://blogs.esa.int/iss-symposium2012/files/2012/05/Robinson_02_May_1545.pdf

Receiving PRISM CW satellite beacon with FUNcube Dongle Pro

watch?v=gVCiDziXLWc

This video demonstrates the AMSAT-UK FUNcube dongle pro receiving
CW signals from PRISM.

The You Tube video has the following comment by the publisher

“I was only using a vertical VHF/UHF antenna hooked up to the FUNcube Dongle Pro. Software is SDR-Radio and HRD Satellite Tracker, both by Simon HB9DRV”

You can purchase the FUNcube dongle pro HERE

AO-27 Demo

AO-27 transmits with a power output of 0.5 W into a quarter-wavelength whip antenna. Satellites are approximately 500 miles (800 km) distant when directly overhead and over 2,000 miles (3,200 km) distant when near the horizon. For use on AO-27 with a half-wavelength whip, your receiver sensitivity at 436 MHz should be at least 0.18 uV for 12 dB SINAD, which corresponds to the approximate signal strength of AO-27 at 10 degrees elevation when your whip antenna is correctly positioned for the polarization of the incoming signal. At the horizon, AO-27’s signal strength, under similar conditions, is approximately 0.13 uV. Most modern, high-quality amateur radio transceivers will meet these specifications if designed to operate at this frequency (i.e., without modifications). Most scanners, and most radios which have had to be modified to cover 436 MHz, will not.
AO-27 transmits FM on about 436.795 MHz, plus/minus Doppler shift of up to 10 kHz on either side. Their uplink frequency is 145.850 MHz, plus/minus Doppler corrections of up to approximately 3.4 kHz.
by Ray Soifer, W2RS

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