ARLA/CLUSTER: Videos de palestras realizadas no colóquio da AMSAT-UK a 26 de julho, disponíveis para visualizações

[João Costa > CT1FBF]

ISEE-3 Presentation video now available

Mario Lorenz DL5MLO and Achim Vollhardt DH2VA from AMSAT-DL Bochum
gave a presentation on the ISEE-3 (ICE) spacecraft to the AMSAT-UK
International Space Colloquium in Guildford on July 26, 2014

The video of the presentation which included a live demonstration of
telemetry reception from the spacecraft can now be viewed on the web
or downloaded to your PC. The presentation slides and a recording of
ISEE-3 telemetry are also available.

The International Sun-Earth Explorer (ISEE-3) is a NASA spacecraft
that was launched in 1978 to study Earth’s magnetosphere. It was
repurposed and renamed the International Cometary Explorer (ICE) in
1983 to study two comets and has been in a heliocentric orbit since
then, traveling just slightly faster than Earth. It’s finally catching
up with Earth from behind with the closest approach expected in
August, 2014.

Since NASA no longer has the capability to receive and command the
spacecraft a group of amateurs, with NASA’s permission, decided to do
it for themselves.

On March 1-2, 2014 radio amateurs at the Bochum Amateur Radio Facility
in Germany were able to detect the beacon signal from the spacecraft
over a distance of 43 million km. After some changes to the ground
equipment and aligning the receive antenna to the predicted position
in the sky, the 2 GHz beacon signal could positively be identified due
to its frequency, the position in the sky and the frequency shift due
to the radial velocity (Doppler shift).

The 20m dish at Bochum was used to receive the signals. In 2003,
AMSAT-DL converted this former industrial monument into a fully
functional groundstation for deep space probes. Since 2009 the
facility is being used by volunteers almost full time as ground
receive station for data from the STEREO mission with its two
spaceprobes monitoring the sun from different viewing angles.

In June Dennis Wingo KD4ETA and other volunteers succeeded in
commanding the spacecraft using the Arecibo dish in Puerto Rico.

Links to the ISEE-3 video, slides and ISEE-3 telemetry recording are at
http://amsat-uk.org/colloquium/colloquium-2014/presentation-videos/