IARU Paper: APRS Harmonization and removal of OSCAR sub-band

IARU_Region_1_logoIARU Region 1 has released the papers for the Interim Meeting to be held in Vienna April 15-17, 2016.

Among the papers for the C5 VHF/UHF/Microwave Committee is one on harmonizing APRS.

VIE16_C5_41_1.pdf – 144 /435 MHz APRS Harmonisation

The paper covers global band planning considerations and among the recommendations says:

Emphasise that spaceborne APRS must be confined to globally coordinated amateur satellite sub bands. Therefore items that are ambiguous and generate confusion in national band plans such as ‘Space communications’ and ‘New Oscar Sub band’ should be removed as soon as possible in all Regions in accordance with IARU-AC and Satellite Coordination guidance

It is believed that ‘New Oscar Sub band’ refers to the USA’s ARRL 144 MHz band plan and ‘Space communications’  to the Australian WIA 144 MHz band plan. These band plans, as well as those for some other countries, show 144.300 – 144.500 MHz as being for Amateur Satellite use.

Direct link for C5 VHF/UHF/Microwave Papers

Links for all committee papers and email addresses of Committee Chairs are at
[Although URL says 2017 the meeting is 2016]

ARRL 144 MHz Band Plan http://www.arrl.org/band-plan

WIA 144 MHz Band Plan http://www.wia.org.au/members/bandplans/data/documents/Australian%20Band%20Plan%202m%20150729.pdf

New OSCAR Satellite Status Page

OSCAR Satellite Status Page

OSCAR Satellite Status Page

Thanks to the efforts of Joe KM1P and Peter 2E0SQL, and with the permission of David KD5QGR, we have set up a copy of the OSCAR satellite status page.

This page will be maintained by multiple volunteers, including myself, and we will be able to add and delete satellites as required, as well as keep information links current. It will take a few days to populate the database, but please begin using this page as soon as possible. In the near future the old page will point to this one for a while, until people get used to the new address.

There are still some satellites to add and delete, so this will be a work in progress for a bit. First and foremost we will delete the reentered sats, and add Fox-1A for next Thursday [Oct 8]!

73, Drew KO4MA
AMSAT VP Operations

OSCAR Satellite Status Page http://www.amsat.org/status

Online satellite orbital predictions http://www.amsat.org/amsat-new/tools/predict/

Summer issue of OSCAR News now available

OSCAR News Summer 2014 Front CoverE-members of AMSAT-UK can now download the Summer edition of OSCAR News here. In this issue is a picture of Brent Salmi KB1LQD and Bryce Salmi KB1LQC at the National Radio Centre in Bletchley Park where they met up with AMSAT-UK’s Graham Shirville G3VZV.

The paper edition should be posted to members in 2-3 weeks.

In this issue:
• Prof Colin Pillinger obituary
• AGM Calling Notice
• AO7 40th Birthday
• Astronaut Wubbo Occels remembered
• AMSAT-UK satellite Projects update
• UK CubeSat Forum report
• FUNcube-1 Lessons learnt
• DUO 817 Satellite Controller
• FUNcube-1 Activity report
• The FUNcube Dongle and SDR Software School Experiments at UCF in Cuba
• FUNcube Turnstile announcement
• Colloquium 2014 Booking Details

AMSAT-UK FUNcube Mission Patch

AMSAT-UK FUNcube Mission Patch

Membership of AMSAT-UK is open to anyone who has an interest in amateur radio satellites or space activities, including the International Space Station (ISS).

E-members of AMSAT-UK are able to download OSCAR News as a convenient PDF that can be read on laptops, tablets or smartphones anytime, anyplace, anywhere. Join as an E-member at Electronic (PDF) E-membership

There are two rates for the paper edition to cover the extra postage costs:
Rest of the World (Overseas)

PDF sample copy of “Oscar News” here.

Join AMSAT-UK using PayPal, Debit or Credit card at

E-members can download their copies of OSCAR News here.

APRS destination address for ham radio satellites

APRS LogoAPRS has standardized an ID series for amateur radio OSCAR spacecraft – APOxxx

At the request of Juan Carlos, LU9DO, AMSAT-LU wanted a series of APRS designators for uniquely identifying AMSAT APRS applications.  He suggested those beginning with the letter O for OSCARS.

ALL APRS applications include this identifier in their packets so that the source of APRS data can be known.  See the list at



APRS UK Yahoo Group http://groups.yahoo.com/group/APRSUK

UK STRaND-1 CubeSat Video

Dr Chris Bridges and STRaND

Dr Chris Bridges and STRaND hardware

In this video Surrey Space Centre’s Dr. Peter Shaw talks us through the anatomy of the highly advanced UK CubeSat STRaND-1.

The innovative amateur radio STRaND-1 CubeSat aims to carry a NEXUS Android Smartphone into space to demonstrate the feasibility of using cheap Smartphone electronics to control a spacecraft.

A software-based speech synthesiser will be included to pay homage to the UOSAT family of satellites (OSCAR-9 and OSCAR-11) that were launched in the 1980′s.

STRaND-1 will carry an amateur radio payload with an AX.25 packet radio downlink on 437 MHz using data rates of 9k6 or 19k2 bps.

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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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