AMSAT UK

Syndicate content AMSAT-UK
Radio Amateur Satellites
Actualizado: hace 2 mins 10 segs

FUNcube-1’s Birthday

Vie, 11/14/2014 - 11:16

AO-73 (FUNcube-1) – Image credit Wouter Weggelaar PA3WEG

Hi Folks,

It seems amazing to us that FUNcube-1 – AO73, was launched nearly one year ago, in fact at 07:10 UTC on 21 Nov 2013. The very first signals were received by ZS1LS in South Africa at 07:37 UTC and he was even able to upload the resulting data to the Warehouse so the results could be seen immediately.

We are extremely happy to say that, since then, the satellite has been performing very satisfactorily, the battery voltage doesn’t drop below 8 volts, and becomes fully charged within about 7 – 10 minutes after re-entering sunlight from eclipse.

Howard Long G6LVB working AO-73 while Ciaran Morgan M0XTD captures the downlink passband data using a FUNcube Dongle Pro+ and Microsoft Surface Tablet

On Friday 21 Nov 2014, we will be celebrating the satellite’s first birthday. To mark the occasion, we will be activating the transponder earlier than normal – late on Thursday 20 Nov, so that it will be available for use during the whole of Friday. So please make as many contacts as possible through the transponder during Friday, FUNcube’s actual birthday. You are invited to make a note of any stations worked on this day, or any other comments on the FUNcube Forum. Please use the existing “FUNcube-1’s Birthday” topic, under the Welcome heading. The URL of the Forum is http://forum.funcube.org.uk/

Please also remember the ’73 on 73′ Award which is kindly being organised by Paul Stoetzer N8HM. See http://amsat-uk.org/funcube/73-on-73-award/ for more details.

Wouter Weggelaar PA3WEG talking about FUNcube-1 to students at Abbeys Primary School in Bletchley

We would like to take this opportunity of thanking all of our ‘users’, both those who download telemetry and forwarding it to the warehouse, and of course, all users of the transponder. This telemetry data is invaluable, both as an educational resource and to enable us to see how the spacecraft systems are performing and surviving. So far we have collected almost 400MB of unique data via stations from all around the world.

Of course we are hoping that the satellite continues to function nominally for several more years to come even though we may never reach AO7’s record!

73s AMSAT-UK and AMSAT-NL

First 73 on 73 Award issued to Wyatt Dirks AC0RA

The AMSAT-UK Flickr Group is at https://www.flickr.com/groups/amsatuk/
Please upload your pictures of amateur satellites, satellite ground stations, satellite demonstrations or any other satellite related event.

73 on 73 Award http://amsat-uk.org/funcube/73-on-73-award/

Data Warehouse – Telemetry Archive http://warehouse.funcube.org.uk/

Dashboard App – Telemetry Decoder http://funcube.org.uk/working-documents/funcube-telemetry-dashboard/

49.9 MHz Backscatter Radar 16 kW with 64 Antennas

Mié, 11/12/2014 - 21:25

First 18 of the 49.9 MHz radar antennas pointing skywards

An impressive back-scatter radar on 49.9 MHz is currently being constructed in Ethiopia.

The Bahir Dar coherent backscatter radar is being assembled by researchers from the University of Oulu, Finland and Boston College, USA.

The radar will operate at 49.9 MHz with a 16 kW solid-state transmitter and 64 antennas. The sampling is based on a number of USRP X300-series boxes (the USRP was developed by Matt Ettus N2MJI).

Backscatter radar http://blog.sgo.fi/2014/11/bahir-dar-coherent-backscatter-radar.html

Lassi Roininen on Twitter https://twitter.com/LassiRoininen

Sodankylä Geophysical Observatory
https://www.facebook.com/pages/Sodankyl%C3%A4-Geophysical-Observatory/551697518290573

Predictions App for Deep Space Ham Radio Satellite

Mié, 11/12/2014 - 17:03

ARTSAT2 DESPATCH Deep Space Sculpture

Two amateur radio satellites ARTSAT2: DESPATCH (437.325 MHz CW) and Shin’en 2 (145/435 MHz linear transponder + 437 MHz WSJT) should be launched into deep space at the end of November.

Masahiro JI1IZR has announced that prediction software is available for ARTSAT2: DESPATCH:

One of the new deep space small satellites, “ARTSAT2: DESPATCH”, will be launched on the end of this month.

I developed a predict utilities that display the information got from the Web API data provided by the “ARTSAT” project team.

You can get the utilities and information from:
http://ji1izr.air-nifty.com/ham_satellite/in_english/index.html

You will also have the information of the satellite “ARTSAT2: DESAPTCH” from:
http://artsat.jp/en/project/despatch
http://pre.artsat.jp/wp-content/uploads/2014/07/despatch_abstract_en_ver1.0.1.pdf

I appreciate your notice for the project.

Thank you.

Masahiro Sanada JI1IZR

Art and Ham Radio in Deep Space http://amsat-uk.org/2013/11/03/art-and-ham-radio-in-deep-space/

Shin’en 2 has a linear transponder http://amsat-uk.org/2014/09/01/japanese-asteroid-mission-to-carry-amateur-radio/

4M – End of Mission

Mar, 11/11/2014 - 23:45

LX0OHB-4M amateur radio lunar payload – Credit LuxSpace

The JT65B amateur radio payload, which successfully completed a lunar flyby, has fallen silent after transmitting for 438 hours.

During the afternoon of November 10 the battery voltage dropped from 13.1V to 12.1V and continued falling. The last signal was received by Rein W6SZ at 01:35 UT on November 11 when the battery voltage had fallen to 8.4 volts.

Ghislain LX2RG posted the following to the Moon Net list:

Here at Luxspace, we have to thank you all for the reports, for the tracking, and we also hope that we provided you with the challenges you expected.

4M may possibly awaken from time to time if illumination becomes better.

We shall now endeavor to prepare the next one.

Manfred Memorial Moon Mission (4M) LX0OHB-4M http://moon.luxspace.lu/blog/

4M Lunar Payload http://amsat-uk.org/2014/10/15/4m-lunar-payload-integrated-keps-released/

40 Years of Tracking OSCAR-7

Dom, 11/09/2014 - 20:57

Satrack showing OSCAR 7 (AO-7)

William Leijenaar PE1RAH shows how people tracked satellites in the time before PC’s and AMSAT Argentina show how it’s done today.

In the 1974 radio amateurs tracked OSCAR 7 (AO-7) using an OSCARLOCATOR that comprised a polar great circle map and overheads for each satellite.

40 years later OSCAR 7 is still operational when in sunlight and thanks to William Leijenaar PE1RAH you can now download the map and overheads to make your very own OSCARLOCATOR. Read his article at
http://www.qsl.net/pe1rah/oscarlator.htm

AMSAT Argentina has recently released the online satellite tracker Satrack, use it at http://amsat.org.ar/sat.htm

The PC version can be downloaded from http://amsat.org.ar/Satrack.htm

Special Event Station for 40th Anniversary of OSCAR 7 Launch
http://amsat-uk.org/2014/10/31/special-event-station-for-40th-anniversary-of-oscar-7-launch/

OSCAR 7 in Space

 

Ham Radio in Hackaday Prize Finals

Sáb, 11/08/2014 - 20:46

SatNOGS – Satellite Networked Open Ground Station

Two of the five finalists for the Hackaday Prize involve amateur radio, the prize is a ticket to travel into space.

Six months ago Hackaday challenged their readers to realize the future of open, connected devices. They have now announced the five finalists vying for The Hackaday Prize.

The SatNOGS project involves a network of satellite ground stations, they are using crowdsourced data collection for something that is literally out of this world: listening to the ever-increasing number of amateur satellites orbiting the planet.
http://hackaday.com/2014/11/07/hackaday-prize-finalist-a-network-of-satellite-ground-stations/

PortableSDR is a completely stand-alone (no computer needed), compact, Portable Software Defined Transceiver. Originally designed for backpacking use by Ham Radio operators. It includes complete coverage up to about 30 MHz.
http://hackaday.com/2014/11/05/hackaday-prize-finalist-a-portablesdr/

The contest was open to entries from around the world with the exception of residents of Quebec, Italy, Cuba, Iran, Myanmar, North Korea, Sudan, Syria, or any jurisdiction where the Contest would be restricted or prohibited by law.

The winner of the Hackaday Prize for the best example of an open, connected device should be announced at the Electronica trade show in Munich on November 13.
http://hackaday.io/prize

Announcing the Five Finalists for The Hackaday Prize
http://hackaday.com/2014/10/13/announcing-the-five-finalists-for-the-hackaday-prize/

SatNOGS – Satellite Networked Open Ground Station https://satnogs.org/

Ex-Ofcom employee now ITU Deputy Secretary-General

Jue, 11/06/2014 - 20:48

Malcolm Johnson

Malcolm Johnson of the United Kingdom has been elected as the ITU’s new Deputy Secretary-General  at the 19th International Telecommunication Union (ITU) Plenipotentiary Conference in Busan, Korea.

Wiki records that he has represented UK in several international organizations, including the International Maritime Organization (IMO), Inmarsat, and the European Space Agency (ESA). He was employed at the Telecommunication Regulations Division of the European Commission between 1987 and 1992.

Later on, from 1992 to 2003, he was Director of the UK’s Radiocommunications Agency. In 2003, Johnson joined the UK Office of Communications (Ofcom) at its inception, he was International Coordinator with lead responsibility for UK in ITU and European Conference of Postal and Telecommunications Administrations (CEPT). He remained in this position until 2006.

Malcolm Johnson was elected Director of the Telecommunication Standardization Bureau (TSB) of the ITU Standardization Sector (ITU-T) by the ITU Plenipotentiary Conference 2006. He took office on January 1, 2007 and was re-elected at the ITU Plenipotentiary Conference 2010.

Beijing’s Houlin Zhao was elected Secretary-General of the ITU replacing radio amateur Dr. Hamadoun Touré HB9EHT. Houlin Zhao had served 8 years as Deputy Secretary-General.

Read the ARRL story at http://www.arrl.org/news/view/the-itu-elects-a-new-secretary-general

Wiki – Malcolm Johnson http://en.wikipedia.org/wiki/Malcolm_Johnson_%28administrator%29

Japanese Microsatellites Launched

Jue, 11/06/2014 - 09:30

A typical Dnepr launch – Credit ISC Kosmotras

On Thursday, November 6 at 07:35:49 UT a Dnepr rocket carrying the primary payload Asnaro-1 and four microsatellites was launched from Dombarovsky near Yasny. Kosmotras report all spacecraft have been inserted into their target orbits.

The four Japanese microsatellites are:
- ChubuSat-1 (Kinshachi-1) 437.485 MHz CW/AX.25 (Digipeater uplink 145.980 MHz)
- TSUBAME 437.250 MHz CW and 437.505 AX.25
- Hodoyoshi-1 467.674 MHz
- QSAT-EOS (Tsukushi) an AX.25 GMSK payload has been reported but the frequency is unknown.

Signals have been received from both ChubuSat-1 and TSUBAME.

The 50kg class ChubuSat-1 aims to
• Relay messages in amateur service (AX.25 packet radio Digipeater)
• Take pictures of particular site on Earth commanded from the Earth station with an optical camera and an Infra-red camera
• Try to take pictures of space debris commanded from the Earth station with above two cameras
It will have 3 axis stabilisation

The 30kg class TSUBAME aims to
• Demonstrate satellite bus technology for 30kg-class microsatellite and verification of COTS components such as micro-processors, memory and Li-ion batteries in the space environment
• Verify of Control Moment Gyros developed by the Laboratory for Space Systems
• Demonstrate of high-speed attitude manoeuvres technology using Control Moment Gyros. Some sensor data acquisition experiments will be conducted at the same time in order to demonstrate applications of CMGs
• Demonstrate of SRLL communication protocol developed by Tokyo Institute of Technology and high-speed GMSK data downlink
• Collect data through internet with the aid of radio amateurs all over the world

TSUBAME TLE http://www.dk3wn.info/p/?p=51785

Kosmotras announcement http://www.kosmotras.ru/en/news/155/

Satellite info and launch video http://russianspaceweb.com/dnepr_asnaro.html

ChubuSat-1 Slides http://www.frontier.phys.nagoya-u.ac.jp/chubusat/ChubuSat-20130311.pdf

UHF Satellite frequencies http://www.satellitenwelt.de/freqlisten/SatFreq-UHF.txt

IARU Satellite Frequency Coordination Panel Status Pages http://www.amsat.org.uk/iaru

UAE’s first CubeSat Nayif-1

Mar, 11/04/2014 - 16:35

The Dubai based Emirates Institution for Advanced Science and Technology (EIAST), in partnership with American University of Sharjah (AUS) are developing the UAE’s first CubeSat Mission, Nayif-1, which they hope will be launched on a Falcon 9 by the end of 2015.

A report in Satellite Pro magazine says students will go through an intense systems design and testing training and will partake in the program as their Senior Engineering Design project and participate in the design, assembly, integration and testing of the CubeSat. Nayif-1 will carry out a 1U Communication Mission with development taking place in AUS, EIAST’s facilities and Delft in the Netherlands.

Read the Satellite Pro story at
http://www.satelliteprome.com/news/eiast-launches-uaes-first-cubesat-mission-nayif-1/

Gulf News
http://gulfnews.com/news/gulf/uae/education/eiast-and-aus-launch-uae-s-first-cubesat-mission-1.1408034

EIST http://eiast.ae/en

IARU Region 1 Approve Youth Budget and Satellite Allocation

Lun, 11/03/2014 - 23:53

Lisa Leenders PA2LS

The minutes of the Final Plenary, 23rd IARU Region 1 General Conference have been released.

The Conference approved these Youth budgets:
a. Youth Projects – 25,000 Swiss Francs for the years 2015, 2016 and 2017
b. Youth Working Group – 2,000 Swiss Francs for the years 2015, 2016 and 2017
One Swiss Franc is roughly equivalent to £0.65, $1.04, €0.83.

It was agreed to set up a Youth Working Group which will be Chaired for three years by Lisa Leenders, PA2LS.

A new satellite Space-to-Earth (downlink) band from 144.000 – 144.025 MHz with a maximum signal bandwidth of 2.7 kHz was agreed. This allocation is now available in all three IARU regions.

Read the minutes at
http://rsgb.org/main/files/2013/05/VA14_IARU-R1_Conference-Plenary-minutes.pdf

Additional information is in annexes/minutes which are awaiting release, check
http://rsgb.org/main/about-us/committees/spectrum-forum/sf-iaru-matters/sf-iaru-r1-conference/

Special Event Station for 40th Anniversary of OSCAR 7 Launch

Vie, 10/31/2014 - 21:52

OSCAR 7 in Space

Patrick Stoddard WD9EWK/VA7EWK has secured the special call sign W7O (Whiskey Seven Oscar) for use in commemorating the 40th anniversary of the launch of OSCAR 7 on November 15, 1974.

OSCAR 7 in anechoic chamber with Perry Klein K3JTE and Jan King K8VTR/W3GEY – Credit Dick Daniels W4PUJ

On the AMSAT Bulletin Board he writes:

I plan on having this call on the air between November 15-24 2014, working satellites and possibly other bands.  I will work satellite passes from Arizona, including AO-7 passes, and hope to recruit a small group of operators who can work other passes that cover eastern North America along with other places I can’t work from here (Europe, North Africa, South America).  I may also try to get some operators working HF with this call.

I will handle the QSL requests for W7O during this period. I am thinking of incorporating the original QSL card design AMSAT used to confirm AO-7 reception reports from the 1970s in the W7O card.

The QSL cards will be printed after the W7O activity wraps up.  I will also upload W7O QSOs to ARRL’s Logbook of the World system.

Please contact me directly if you have any questions related to this operation, or if you are willing to operate on satellites and/or HF as W7O during this 10-day period.

Thanks in advance, and 73!

Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/

OSCAR 7 with Dick Daniels W4PUJ, Jan King K8VTR-W3GEY, Marie Marr and Perry Klein K3JTE

The amateur radio satellite AMSAT-OSCAR 7 was launched by a Delta rocket from Vandenberg Air Force Base on November 15, 1974 and provided many years of service until it went silent from battery failure in mid 1981.

For 21 years nothing more was heard until June 21, 2002 when Pat Gowen G3IOR came across a beacon sending slow 8 -10 wpm CW on 145.973.8 MHz. It sounded like old OSCAR satellite telemetry, it had the familiar HI HI followed by a string of numbers in groups of three. After monitoring by many radio amateurs it turned out to be OSCAR-7, and it seemed to have come back from the dead.

Pat’s email to the AMSAT Bulletin Board announcing his discovery can be seen at

http://www.amsat.org/amsat/archive/amsat-bb/200206/msg00525.html

It is believed that in 1981 the batteries failed short-circuit, however, in 2002 they became open-circuit enabling the satellite to run again from the solar panels. Since that day OSCAR 7 has been operational when in sunlight and provided radio amateurs with many long distance (DX) SSB/CW contacts.

Remember when working OSCAR 7 use the least uplink power possible to minimize your downlink power usage, and maximize the number of simultaneous contacts supported in the passband.

A BBC News report Radio ham finds lost satellite about the reception of OSCAR 7 by Dave Rowan G4CUO can be seen at http://news.bbc.co.uk/1/hi/england/2149381.stm

A collection of photos by Dick Daniels W4PUJ taken during the construction, test and launch of the AMSAT-OSCAR 7 spacecraft in 1973 and 1974 can be viewed at http://n4hy.smugmug.com/AMSAT/AMSAT-Oscar-7

Oscar 7 Information http://ww2.amsat.org/?page_id=1031

Video of 2E0HTS Working the OSCAR-7 Satellite http://amsat-uk.org/2012/01/26/2e0hts-working-the-oscar-7-satellite/

2010 video of the then AO-7 distance record http://www.southgatearc.org/news/january2010/new_ao7_record.htm

‘Getting started on amateur radio satellites’ by G7HIA published in the March 2007 RadCom. Download the article at http://ukamsat.files.wordpress.com/2011/05/satellites_radcom_mar07.pdf
Copyright 2007 Radio Society of Great Britain. For personal use only – no copying, reprinting or distribution without written permission from the RSGB.

Join the AMSAT Bulletin Board AMSAT-BB http://amsat.org/mailman/listinfo

 

ISS HamTV Presentation by G3VZV

Vie, 10/31/2014 - 18:22

Front panel of the HamTV transmitter

In this video radio amateur Graham Shirville G3VZV talks about the International Space Station (ISS) HamTV project. The presentation was given to the BATC Convention on October 26, 2013.

Watch ISS Ham TV

Noel Matthews G8GTZ, Chair of the BATC, has announced the first 11 presentation videos from the CAT13 convention on ATV/DATV, held October 26, 2013, have been put up on the BATC video archive area.

They can be found in the http://batc.tv/ Film Archive by selecting the BATC CAT13 category.

The direct links are as follows:

BATC review http://www.batc.tv/streams/cat1301

LNB developments http://www.batc.tv/streams/cat1302

HAB introduction http://www.batc.tv/streams/cat1303

Early colour cameras http://www.batc.tv/streams/cat1304

SMD techniques http://www.batc.tv/streams/cat1305

DTX1 DVB-S xmtr http://www.batc.tv/streams/cat1306

DATV in practice http://www.batc.tv/streams/cat1307

Spectrum matters http://www.batc.tv/streams/cat1308

10 GHz Tx multipliers http://www.batc.tv/streams/cat1309

10GHz PLL LNBs http://www.batc.tv/streams/cat1310

ISS HAMTV http://www.batc.tv/streams/cat1311

Press coverage of 4M ham radio lunar payload

Jue, 10/30/2014 - 23:35

LX0OHB-4M amateur radio lunar payload – Credit LuxSpace

The successful amateur radio lunar payload 4M launched on October 23 has generated a number of articles, the latest is in The Daily Beast.

Read The Daily Beast article about the first privately-funded spacecraft to travel the Moon at http://www.thedailybeast.com/articles/2014/10/26/luxembourg-and-china-team-up-on-private-mission-to-the-moon.html

Since its launch 4M has been transmitting the digital mode JT65B on 145.980 MHz. The signal was first picked up 79 minutes after launch by Roland Zurmely PY4ZBZ in Brazil. The signal was very weak as 4M flew around the Moon but radio amateurs still managed to copy it. 4M is now heading back toward Earth.

4M reception by Berend PA3ARK

Ghislain Ruy LX2RG has provided some additional information on the 4M project:

This project is entirely funded by our company [Luxspace], with strictly no commercial purpose. It means also that it had to be cheap, fast, efficient. In the partner page, you will find all those partner companies that have provided their services for free or at reduced cost. http://moon.luxspace.lu/partners/

I had only 6 months to set it all up, starting from blank page or quite so. I mean all really. And on top of that a mission from my boss: take the youngest by the hand and lead them to success. Done. I have repaid what I have been given by the elders when I was a beginner.

Here are at Luxspace, we are quite a lot of skilled high level engineers, and to say the truth, we do not object having fun on top of that.

LSE space offered for free to deal with all the data handling and setup all the website, data base, and so on. They did it in a very few months, and choose the most practical way for them in order to be in time and operational. And we are. As simple as it is.

We have learned a lot during these 6 months, and the last 6 days have been quite an education also.

The next mission will integrate all what was discovered and learned. My homework this week is to write it all down. Now, it is Java, and that’s it. Could have been better, but it works as expected or so, and that’s what counts. Fine tuning will come later.

Believe or not, I knew nothing of JT65B 7 months ago. We have put it all in a small microprocessor, including SDR !

Read the 4M blog at http://moon.luxspace.lu/blog/

For tracking information just enter your latitude and longitude at http://moon.luxspace.lu/tracking/

Lunar Ham Radio Payload Launched http://amsat-uk.org/2014/10/23/lunar-ham-radio-payload-launched/

ARRL – Radio Amateurs Report Hearing 4M Moon Orbiter JT65B Signal
http://www.arrl.org/news/radio-amateurs-report-hearing-4m-moon-orbiter-jt65b-signal

AMSAT-UK
Facebook https://www.facebook.com/amsatuk
Twitter https://twitter.com/AMSAT_UK

Bandplan released for 146 MHz

Jue, 10/30/2014 - 18:48

Friday, October 31 is the formal start of the 146-147 MHz ‘experiment’ for Full licence holders with NoV’s and the RSGB has released a bandplan.

The bandplan has an allocation for digital modes with up to 500 kHz bandwidth and 12.5 kHz channels for narrowband digital modes including digital voice.

Users of wideband modes may need to use bandwidth tailoring to ensure no RF extends into the weak signal satellite segment at 145.8-146.0 MHz (the Lunar 4M JT65B beacon uses 145.980 MHz) or goes above 147.0 (or 146.93750 where applicable).

Download the bandplan from http://rsgb.org/main/files/2014/10/146-147-Initial-Bandplan.pdf

Some amateurs will be active in the early hours of Friday with the digital voice mode FreeDV which uses Codec2, download FreeDV from http://freedv.org/tiki-index.php

Apply now for your NoV at http://rsgb.org/main/operating/licensing-novs-visitors/online-nov-application/146mhz-147mhz-nov/

146-147 MHz Usage and Band Planning FAQ
http://amsat-uk.org/2014/10/28/146-147-mhz-usage-and-band-planning-faqs/

RSGB 146 MHz Information
http://rsgb.org/main/operating/band-plans/vhf-uhf/vhf-spectrum-release/

Join AMSAT-UK

Jue, 10/30/2014 - 16:04

AMSAT-UK Logo

Founded in 1975 AMSAT-UK is a voluntary organisation that supports the design and building of equipment for amateur radio satellites.

AMSAT-UK initially produced a short bulletin called OSCAR News to give members advice on amateur satellite communications. Since those early days OSCAR News has grown in size and the print quality has improved beyond recognition. Today, OSCAR News is produced as a high-quality quarterly colour A4 magazine consisting of up to 40 pages of news, information and comment about amateur radio space communications.

The new lower-cost E-membership provides OSCAR News as a downloadable PDF file giving members the freedom to read it on their Tablets or Smartphones anytime, anyplace, anywhere.

An additional advantage is that the PDF should be available for download up to 2 weeks before the paper copy is posted.

AMSAT-UK FUNcube Mission Patch

The Membership year lasts for 12 months starting on January 1 each year.

If you join after July 31 of any particular year, then you will receive complimentary membership for the whole of the following year, i.e. join on August 10, 2014, and you have nothing more to pay until Dec 31, 2015.

Take out an Electronic membership here http://shop.amsat.org.uk/shop/category_9/Join-Amsat-UK.html

E-members can download their copies of OSCAR News from http://www.amsatuk.me.uk/on

A sample issue of OSCAR News can be downloaded here.

146-147 MHz Usage and Band Planning FAQ

Mar, 10/28/2014 - 11:00

The new 146-147 MHz allocation is available to UK Full licence holders from October 31, 2014. The RSGB have issued a FAQ document which answers some of the common questions about the new allocation.

They say in terms of enabling innovation and experimentation it might have been preferable if Ofcom was prepared to grant 146 MHz NoVs to holders of all classes of UK amateur licence. However, the Ofcom view was that because Full licensees have demonstrated a greater comprehension of the interference aspects, NoVs will only be available for holders of full amateur licences.

Map illustrating where 146 MHz cannot be used

It is expected the allocation will be used for wideband digital transmissions. Bandwidth tailoring will be imperative to ensure no RF extends into the weak signal satellite segment at 145.8-146.0 MHz (the Lunar 4M JT65B beacon uses 145.980 MHz). Narrow band users in 147 MHz must also be protected from any increase in the noise floor.

The FAQ says:

The 146‐147 MHz band is ideal for testing new forms of medium bandwidth data transmission that can surpass traditional methods such as amateur AX25 packet data. Some higher speed data modes used by amateurs on microwave frequencies produce a very wide transmitted spectrum and are clearly not suitable for the 146‐147 MHz band. Even the 128kbps medium data rate D‐Star ‘DD Mode’ used on the 1296 MHz band fills up over 500 kHz of bandwidth at 60dB down on the peak transmitted power. However we do expect that amateurs will be able to develop solutions compatible with the spectral constraints of the 146‐147 MHz band.

In the initial 146‐147 MHz band plan there is a recommendation that wider bandwidth data modes should be centred at 146.500 MHz to make sure that all of the sidebands are contained within the 146‐147 MHz band. For initial experiments the recommendation is to use data rates of no more than 350 kbps and measure the total bandwidth at the transmitter output in order to ensure maximum protection of other users at the 147 MHz band edges and amateur satellite users below 146 MHz. As amateur radio access to the 146‐147 MHz band has been granted on a non‐interference basis, it is important that all amateurs adhere to these guidelines in order to ensure that there is no interference with users of adjacent bands. In the longer term it might be possible with bandwidth tailoring and pre‐distortion techniques to produce cleaner transmitters to permit greater data rates with sharper spectral slopes.

Apply now for your NoV at http://rsgb.org/main/operating/licensing-novs-visitors/online-nov-application/146mhz-147mhz-nov/

The application asks you for your Licence Number which appears on page 1 of your licence. If you don’t have it simply login to the Ofcom licencing page and download a new licence PDF at https://services.ofcom.org.uk/

RSGB 146 MHz http://rsgb.org/main/operating/band-plans/vhf-uhf/vhf-spectrum-release/

FAQ PDF http://rsgb.org/main/files/2014/03/146-147MHz_FAQ.pdf

146 MHz talk slides http://rsgb.org/main/files/2014/03/RSGB_146-147MHz.pdf

UK radio hams start 146 MHz development
http://www.southgatearc.org/news/2014/october/uk_radio_hams_start_146_mhz_development.htm

New UK Amateur Radio 146 MHz allocation
http://amsat-uk.org/2014/10/13/new-uk-amateur-radio-146-mhz-allocation/

FUNcube-1 Telemetry Statistics

Dom, 10/26/2014 - 23:15

AO-73 (FUNcube-1) – Image credit Wouter Weggelaar PA3WEG

FUNcube-1 was launched on November 21, 2013 and since then radio amateurs and schools have been collecting the telemetry which has been stored in the Data Warehouse.

The Data Warehouse statistics as of 21:49 GMT on October 25, 2014 were:

Number of registered users: 1286
Number of active users (data received in last two weeks): 195
Number of active users since launch: 757

Number of packets transmitted by satellite since deployment: 5865120 (1.5GB)
Number of packets uploaded by users before deduplication: 6370976 (1.63 GB)

Number of packets stored in warehouse: 1466239 (376.9 MB) which also
represents the same number of realtime data points (collected once every
5 seconds),

Whole orbit Data: 276.3 days of data (collected once every minute)
High Resolution Data: 806 hours of data (collected once every second, for a period of a minute, every other minute)

Whole orbit Data: 276.3 days of data (collected once every minute)
High Resolution Data: 806 hours of data (collected once every second, for a period of a minute, every other minute)

Recovery rates:
Realtime  (25%)
WOD (81%)
HiRes (22%)

As always, many thanks to all those who have and continue to send data.

Data Warehouse – Telemetry Archive http://warehouse.funcube.org.uk/
Dashboard App – Telemetry Decoder http://funcube.org.uk/working-documents/funcube-telemetry-dashboard/

Facebook https://www.facebook.com/amsatuk
Twitter https://twitter.com/AMSAT_UK

4M Lunar Payload Update

Sáb, 10/25/2014 - 13:14

LX0OHB-4M amateur radio lunar payload – Credit LuxSpace

On October 25 Ghislain Ruy LX2RG provided this update on the 4M lunar amateur radio payload.

Signals from 4M are quite weak. This is not due to a loss of power as telemetry shows normal parameters, but to the attitude of the last stage that places a deep of the radiation pattern in the direction of the Earth. I hope that Earth’s movement with respect to the inertial attitude of the last stage will give better results in the coming days.

The 4M is becoming a real challenge now, and receiving the signals during flyby will be quite an achievement. A little bit away from the original goal though, but this risk was known.

One sure result is the radiation measurement that showed what was to be expected, and the graphs will soon be pubished on the blog.

I hope you will be able to receive during the AMSAT-DL AGM this weekend, but you will have to put 16+dB [antenna] gain at least.

Radio amateurs are encouraged to receive and report the signals http://moon.luxspace.lu/receiving-4m/

For tracking information just enter your latitude and longitude at http://moon.luxspace.lu/tracking/

See the 4M payload Blog at http://moon.luxspace.lu/blog/

Lunar Ham Radio Payload Launched http://amsat-uk.org/2014/10/23/lunar-ham-radio-payload-launched/

4M Lunar Payload http://amsat-uk.org/2014/10/15/4m-lunar-payload-integrated-keps-released/

AMSAT-UK
Facebook https://www.facebook.com/amsatuk
Twitter https://twitter.com/AMSAT_UK

UK STEM 434 MHz Balloon Flight to Release Plane

Sáb, 10/25/2014 - 12:34

Elysium, a MARS Balloon flight is expected to launch at noon (+/- 1 hour) on Sunday, October 26. The 434 MHz USB signal should cover much of the UK and can also be received world-wide online using the SUWS WebSDR.

The balloon will be launched from the Mendips (51.254, -2.714) and is expected to travel almost directly east for a landing near Basingstoke. The estimated flight time is 135 minutes with a peak altitude of 30 km.

Callsign $$ELYSIUM frequency 434.250 MHz, USB RTTY 50 Baud 560 Hz Shift ASCII-7 no parity 2 stop bits

55 science experiments submitted by 36 schools from across the UK will soar 30 km up into the atmosphere and back. The flight will also contain a plane from Bristol SEDS, activated before launch and to be released at peak altitude, with a separate onboard tracker. Expected to fly further east than Basingstoke.

Callsign $$UBSEDS3 frequency 434.600 MHz LSB RTTY 50 baud 400 Hz shift ASCII-8 no parity 2 stop bits.

Updates on Twitter @marsballoon hashtags #STEM #MARSBalloon
Facebook https://www.facebook.com/marsballoon
Elysium Tracking http://marsballoon.com/elysium-2/
Web http://www.marsballoon.com/

Useful links for tracking and receiving 434 MHz balloons http://amsat-uk.org/beginners/balloons/

Pupils at the King Edward VI Grammar School (KEGS) Chelmsford, Essex are among those who have developed an experiment for MARS Balloon, see @KEGS_engineers

SUWS VHF/UHF/Microwave WebSDR http://amsat-uk.org/2014/08/15/suws-websdr-moves-to-new-site/

NoV suggestion for Airborne Ham Radio

Vie, 10/24/2014 - 14:26

The RSGB response to the Ofcom licence consultation raises the suggestion of the use of NoV’s for aeronautical amateur radio operation.

The UK amateur radio licence currently prohibits airborne operation and amateurs have had to transmit using licence exempt spectrum instead.

The Society is critical of Ofcoms’ proposals regarding 470 kHz pointing out they do not align with the Wireless Telegraphy Act, nor are they the minimum necessary under the ITU Radio Regulations. The RSGB also say the 470 kHz proposals set a dangerous precedent in relation to interference.

Regarding the proposal to remove the 15 minute ID requirement and replace it with ‘as frequently as practicable’ the Society say it is open to too great a range of interpretation (and in some cases might be more burdensome than the well known 15-minute rule). The RSGB also suggests there is currently an ambiguity regarding embedding callsign data in modes such as Digital Voice.

In total over 2,000 people responded which is believed to be a record for an Ofcom consultation. It is thought Ofcom may take some time to publish all the responses but when they do they should be at
http://stakeholders.ofcom.org.uk/consultations/amateur-radio-licence/?showResponses=true

Read the full RSGB response, airborne is referenced in Question 9
http://rsgb.org/main/files/2014/09/141020_RSGB_LicenceReview-Response.pdf

RSGB – UK Amateur Licence Review http://rsgb.org/licencereview