CEPT considers use of 5830-5850 MHz satellite band

CEPT LogoThe CEPT SE24 Short Range Devices meeting M72 took place in Vienna on August 26-27, 2013.

The meeting discussed the use of the frequency bands 5350-5470 MHz and 5725-5925 MHz (‘WAS/RLAN extension bands’) for wireless access systems including radio local area networks (WAS/RLANs).

Any use of Amateur Satellite Service downlink band of 5830-5850 MHz for this purpose would inevitably raise the noise floor making the weak satellite signals even harder to receive.

Read the CEPT working document at M72_Info2_SE24_att_RSCOM13-32rev3_Draft Mandate CEPT 5 GHz RLAN

CEPT SE24 meeting documents can be downloaded from
http://www.cept.org/ecc/groups/ecc/wg-se/se-24/client/meeting-documents

A Ham Radio AX.25 Open Source Soundcard Modem

Audio from AX.25 packet radio - Image credit Sivan Toledo 4X6IZ

Audio from AX.25 packet radio – Image credit Sivan Toledo 4X6IZ

AX.25 packet radio is currently the most popular data protocol for use in CubeSats.

Radio amateur Alejandro Santos LU4EXT is developing extmodem an open source APRS compatible AX.25 packet radio modem.

It is currently capable of both sending and receive packets at 1200 bps AFSK. The main feature of the software is that it is currently running three different demodulators in parallel, increasing the quality of reception. The first modem is Thomas Sailer HB9JNX / AE4WA‘s multimon, the other two are described by Sivan Toledo 4X6IZ in an article in the July/August 2012 issue of QEX.

Download extmodem for Windows from
http://extradio.sourceforge.net/extmodem.html

QEX article – A High-Performance Sound-Card AX.25 Modem
http://www.tau.ac.il/~stoledo/Bib/Pubs/QEX-JulAug-2012.pdf

APRS destination address for ham radio satellites
https://amsat-uk.org/2013/08/23/aprs-destination-address-for-ham-radio-satellites/

LU4EXT on Twitter https://twitter.com/alejolp

SpaceUp India 2012 Videos

FSpace F-1 Amateur Radio CubeSatDhruva Space have released several videos recorded at the SpaceUp India event held in December 2012.

Among the presentations are those from
• Thu Trong Vu XV9AA
• Hackerspace Global Grid
• Suri VU2MY

Watch SpaceUp India 2012 – F1 CubeSat from Vietnam, Thu Trong Vu XV9AA

Watch SpaceUp India 2012 – Hackerspace Global Grid, Uni Stuttgart

Watch SpaceUp India 2012 – Amateur Radio, Suri, VU2MY

Other presentations from the event can be seen at http://www.youtube.com/user/DhruvaSpace

SpaceUp India 2013 takes place December 6-7 in Manit, Bhopal http://spaceupindia.org/

Facebook https://www.facebook.com/pages/SpaceUp-India/479467792071870

SpaceUp http://spaceup.org/

UK radio ham’s Lunar CubeSat to go ahead

Pocket Spacecraft

Pocket Spacecraft

Michael Johnson M0MJJ gave a presentation on his Pocket Spacecraft: Mission to the Moon project to the AMSAT-UK International Space Colloquium held in July at Guildford.

Michael - Founder

Michael – Founder

He aimed to raise funding for the project by using the Kickstarter crowd-funding website.

The 60 fund raising period ended on August 26, 2013 and it fell short of target raising pledges for £69,079 ($107,735) out of the £290,000 ($452,284) goal. However, it appears that thanks to donations from other sources, the Pocket Spacecraft: Mission to the Moon is still going ahead.

Update #6 on the Kickstarter page says:

“More than 350 private individuals, universities and companies have backed the project via Kickstarter so far, but what we weren’t expecting are the amazing direct offers of financial support and support in kind that are too big or unable to be pledged via Kickstarter. Thanks to this support from private individuals, companies, government bodies, non-profits and others, we’re excited to be able to confirm that Pocket Spacecraft: Mission to the Moon will go ahead!”

Melania - Microgravity Experiment Lead

Melania – Microgravity Experiment Lead

The plan is that a 3U CubeSat will carry Pocket Spacecraft known as ‘Scouts’ to the Moon. A ‘Scout’ is a disk with flexible electronics, smaller than a CD, containing a transceiver, antenna and solar cells. The CubeSat should first release a batch of the wafer thin Scout satellites into Earth orbit and then deploy another batch of the Scout satellites into Lunar orbit.

It is understood the mission plans to use the 435 MHz and 2400 MHz bands.

The Kickstarter page says “If you are, or would like to be, a radio amateur, we’ll show you how to communicate directly with your spacecraft in space when it is nearby using inexpensive UHF and S-band equipment. Communication at (cis-)lunar distances is more expensive (typically requiring 5-24m+ steerable dishes), but available to some clubs and enthusiasts.”

KickSat

KickSat

Pocket Spacecraft is believed to be the first UK satellite project to have used Kickstarter. Several USA satellite projects have already successfully raised money on Kickstarter:

Radio ham Zac Manchester KD2BHC used Kickstarter to raise $74,586 in donations to fund the development and deployment of 200 amateur radio KickSat sprite satellites expected to take place later this year.

Radio amateurs Jeroen Cappaert KK6BLQ, Joel Spark KK6ANB and Jonathan Oxer VK3FADO are on the team of the ham radio satellite project ArduSat. They managed to raise donations of $106,330 in just 30 days.

Tim DeBenedictis and Anna Vital with the SkyCube satellite

Tim DeBenedictis and Anna Vital with the SkyCube satellite

SkyCube which will transmit on 915 MHz in the 902-928 MHz amateur radio band raised $116,890.

Kickstarter is not just about raising large sums of money, for example Sandy Antunes used Kickstarter to raise $2,780 to buy a ham radio transceiver and antennas to create an amateur radio satellite ground station Calliope.

Read Pocket Spacecraft Update #6 at
http://www.kickstarter.com/projects/1677943140/send-your-own-pocket-spacecraft-on-a-mission-to-th/posts/576993

Kickstarter page http://www.kickstarter.com/projects/1677943140/send-your-own-pocket-spacecraft-on-a-mission-to-th/

Daily Mail article http://www.dailymail.co.uk/sciencetech/article-2352652/Now-send-personalised-spacecraft-moon-just-99–monitor-it-travels-space.html

Ham Radio Satellites at Tokyo Ham Fair

JAMSAT stand at the Tokyo Ham Fair 2013

JAMSAT stand at the Tokyo Ham Fair 2013

The JARL Ham Fair 2013 was held at Tokyo Big Sight, Ariake, Tokyo on August 24-25. JAMSAT and several amateur radio satellite projects were represented.

The University of Tsukuba CubeSat ITF-1 YUI “Binding” support project was there. The formal name ITF-1 comes from the initial letter of the university slogan “Imagine The Future”.  The satellite also has a popular name YUI which means bond or binding in Japanese, it came from the project’s concept‚ “Creating the Worldwide Human Community”.

The ITF-1 satellite beacon on 437.525 MHz will send telemetry by a Morse Code audio tone on an FM transmitter running 300 milliwats output. It should be possible to receive it using simple equipment such as a handheld transceiver or scanner.

According to the ITF-1 website the “Binding” support project is organized by the student volunteers to support the construction of a consolidated network and expand public relation activities with the aim of encouraging many reception reports when the satellite is launched.  ITF-1 will fly with the primary payload the Global Precipitation Measurement Dual-Frequency Precipitation Radar GPM-DPR satellite in 2014.

ARTSAT stand at the Tokyo Ham Fair

ARTSAT stand at the Tokyo Ham Fair

The ARTSAT stand featured the Invader CubeSat which is being developed by students at Tama Art University. The IARU has coordinated 437.325 MHz and 437.200 MHz for Invader which aims to have a camera for Earth imaging and a Digi-Talker, to transmit voice data using FM. Invader will be on the same launch as ITF-1.

Also at the fair was the SPROUT project. This nano-satellite, built by students from Nihon University, is 20 x 20 x 22 cm with a mass of 6.7 kg. It plans to launch with the L-band (1236.5 MHz/1257.5 MHz/1278.5 MHz) Synthetic Aperture Radar (SAR) satellite ALOS-2 in December, 2013.

SPROUT will have a digi-talker and will transmit, using Slow Scan TV (SSTV) and FM packet, pictures of the Earth taken by an on-board camera. It is believed that radio amateurs will be able to make use of the digipeater and possibly even command when pictures are taken.

ITF-1 project in Google English http://tinyurl.com/ITF-1-Yui-Binding-Project
Imagine The Future https://amsat-uk.org/2012/01/19/itf1-cubesat-imagine-the-future/

ARTSAT project in Google English http://tinyurl.com/ARTSAT
A student art satellite https://amsat-uk.org/2012/04/12/invader-cubesat-a-student-art-satellite/

SPROUT project in Google English http://tinyurl.com/Sprout-Satellite
SSTV satellite https://amsat-uk.org/2012/08/24/sprout-amateur-radio-sstv-satellite-to-launch-in-2013/

JARL Ham Fair 2013 in Google English http://tinyurl.com/JARL-Ham-Fair-2013

Reports on previous JARL Ham Fairs http://www.jarl.or.jp/English/4_Library/A-4-6_ham-fair/ham-fair.htm

Tokyo Ham Fair 2013

Tokyo Ham Fair 2013

Good News for CubeBug-1

CubeBug-1

CubeBug-1

The amateur radio satellite CubeBug-1, also known as El Capitán Beto, launched April 26, 2013, is recovering from the power budget issue that caused the transmitter to be turned off for several days.

This was achieved after one of the AMSAT-LU stations in coordination and in conjunction with Satellogic team, send a command to reconfigure onboard software to turn off attitude control circuits feeding magnetorquers this last weekend .

Telemetry text mode command taken before change can be seen at
http://www.amsat.org.ar/images/cubebug130818.txt

CubeBug - command sent shown top and satellite response below

CubeBug – command sent shown top and satellite response below

Operation was with a RTL SDR dongle, connected directly to antenna, using HDSDR recording software as IF mode only, that helped not to record big amount of data from Orbitron connected to DDE, also automatically compensating Doppler.

After reset, Cubebug-1 went to ‘mission state’, batteries showing adequate level of charge.

Good reports were received from several amateurs from different parts of the globe.

This activity is performed as part of the agreement of mutual collaboration that Satellogic and AMSAT-LU signed on July 2013.

The satellite transmits 1200 bps AFSK, on 437.438 MHz, packets are sent every 30 seconds. The signal is at a low level and a directional antenna and preamp are needed for adequate reception.

Cubebug-1 telemetry information at http://1.cubebug.org/coms/telemetry

73, LU7AA, AMSAT-LU
email: info at amsat.org.ar/
http://www.cetra.org.ar/
http://www.amsat.org.ar/
http://facebook.com/AMSAT.LU

CubeBug-1 carries a packet radio digipeater which it is hoped will be activated for amateur radio use when the primary mission has been completed. Further information at https://amsat-uk.org/satellites/cubebug-1/