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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Spring OSCAR News

The Spring edition of the AMSAT-UK colour A4 newsletter OSCAR News is being posted to members this week.

In this issue
– Dick Daniels W4PUJ SK
– VEGA Maiden Flight Report
– My way to solve the TLE lottery by Mike DK3WN
– Your Spacecraft recording wanted, urgently
– Getting back on the Satellites by Andrew Sellers G8TZJ
– Sumbandilasat
– FUNcube satellite project update
– The Clive Wallis G3CWV Column
– A Swiss satellite to tackle space debris
– ARISSat-1/KEDR goes silent
– FUNcube satellite models part 2
– KickSat – your personal spacecraft in space!
– Shorts

You can get OSCAR News by joining AMSAT-UK online at http://tinyurl.com/JoinAMSAT-UK

AMSAT-UK is a voluntary organisation that supports the design and building of equipment for amateur sadio satellites. Its members are currently building the satellite FUNcube-1.

We invite you to write an article for AMSAT-UK OSCAR NEWS.

If you have written or would like to write an article for AMSAT-UK’s OSCAR News, please email your articles including any photo and artwork to m0tfo@amsat.org

A sample copy of OSCAR NEWS can be found here http://www.uk.amsat.org/on_193_final.pdf

 

We are looking for articles relating to ham radio satellites or anything related to ham radio in space. This can be anything from tips on working your favorite satellite
to using satellite tracking software or your latest project.

Please state within your Email: “For publication”

 

 

 

Qtmm soundcard modem for decoding AFSK1200

 

Qtmm soundcard modem receiving APRS trafficQtmm is a simple AFSK1200 decoder that uses the computer’s sound card for input. It can be used to decode packet radio, APRS and telemetry from OSCAR and Cubesats.
Testing shows a good performance in monitoring the International space station APRS Beacon. More @ Qtmm soundcard modem for decoding AFSK1200

 

Telemetry reception from the AO-27 amateur radio satellite, which also uses AFSK.

Video of AMSAT Symposium Project OSCAR Talk

In this video Lance Ginner, K6GSJ, describes the early days of Project OSCAR, which put Amateur Radio into orbit and lead to the foundation of AMSAT.

Watch AMSAT Symposium 2011 Keynote Speech

Article – “OSCAR-1 Launched 50 Years Ago” http://www.uk.amsat.org/4026

Article – "OSCAR-1 Launched 50 Years Ago"

Lance Ginner K6GSJ with OSCAR 1

Lance Ginner K6GSJ with OSCAR 1

The ARRL have released an English translation of an article about the pioneering amateur radio satellite OSCAR-1

A new, highly informative article on how the world’s first Amateur Radio satellite, OSCAR-1, came to be designed, built and launched has been posted to the ARRL’s Space Communication web page (see the “Articles” section). Written by Andreas Bilsing, DL2LUX, “OSCAR-1 Launched 50 Years Ago” was first published in the German magazine Funkamateur. It is reprinted with their permission. OSCAR-1 was launched just over 50 years ago, on December 12, 1961.

Link the the article in English http://www.arrl.org/files/file/Technology/Bilsing.pdf

ARRL Space Communication page http://www.arrl.org/space-communication