Author: SM0TGU

Ett nytt nummer av den fantastiska tidningen ESR Resonans har kommit från AMSAT-SMs samarbetsförening ESR. Ur innehållet (ej allt…):

• Omvärldsbevakning
• Frekvensomriktare, EMC-och radiostörningar
• 3,5 MHz radiofyr
• Månadens mottagare National HRO-500
• Plötsligt i Karribien!
• En ATU för symmetrisk matning eller “Steampunk ATU”
• Frekvensanalys – del 6
• Nästa nummer

Tidningen kan laddas ner här.

Mer info om ESR på deras hemsida.

Nytt nummer av AMSAT-DL Journal har kommit! Denna gång med bla. följande innehåll:

• Nytt runt ISEE-3
• Flyplansscatter – avancerade beräkningar
• 4M
• CanSat
• Protokoll från AMSAT-DL årsmöte
• FUNcube från Goonhilly
• Satellitnotiser

Så har det satts ännu ett mottagningsrekord att ta signaler från satelliten DESPATCH. Avstånd denna gång var hela 4.695.550 km! Det är OK1DFC som har lyckats med denna bedrift med följande utrustning:
DISH 10m diameter, loop feed horn, LNA ATF 54143 optimized for 437 MHz 0,26dB N/F – 21dB gain, SDR receiver – Signal Hound 1 Hz-4,4 GHz with special RX software ( courtesy of Milan OK1FMF – thank you very much !) – HDSDR SW and PC DELL Vostro.

Läs mer på: http://www.ok1dfc.com/eme/despatch/despatch.htm

Teamet bakom UWE-3 meddelar nu att det kommer bli mindre aktivitet från satelliten:

Källa: ANS 348

UWE-3 was launched with FUNcube-1 on November 21, 2013, the team says they will
now be temporarily ending operations.

Today, more than one year after launch, there will be a temporary end of
operations caused by the end of funding.

However, UWE-3 is in a very good health condition with fully charged batteries
and operations may be continued depending on future research plans.

Without any reception from ground, UWE-3 will carry out a warm reset every four
days and switch regularly between the redundant on-board processors and radios.
Therefore, UWE-3 will switch back to its nominal frequency of 437.385 MHz.

Nevertheless we appreciate the extensive support we received from the HAM
amateurs in the past and hope that also in the future the status of UWE-3 will
be monitored with your support, like you did so many times in the past year.
Thank you so much for the very helpful cooperation in this respect!

UEW-3 News
http://www7.informatik.uni-
wuerzburg.de/forschung/space_exploration/projects/uwe_3/uwe_3_news/

Nu har satelliten DESPATCH fått ett Oscar-nummer: FO-81 eller Fuji OSCAR 81.

Källa: ANS 348:

Prof. Akihiro Kubota of the Tanegashima Space Center in Japan has informed
AMSAT-NA of the successful launch on December 3 of deep space probe DESPATCH.

One important mission for DESPATCH is an experiment in what is called
“cooperative diversity communication.” In this experiment, an attempt will be
made to collect signals from the spacecraft received not only at the ground
station in Tokyo, but also at many ham radio stations around the world. This is
in order to reconstruct the original data from the spacecraft.

Reception of such weak signals to reconstruct data from the spacecraft will
require the expertise of exceptionally skilled ham operators. The builders are
thereby providing a rare opportunity to receive radio signals transmitted by a
spacecraft in deep space, and ask for cooperation radio amateurs around the
world in the project.

Initially, it was expected that the spacecraft would last only a few days but
now it appears that this assessment was pessimistic with a longer life now
expected..

Since DESPATCH appears to have met all of the requirements for an OSCAR number,
including IARU coordination, I hereby with the authority vested in me be the
AMSAT-NA President, do confer on DESPATCH, the OSCAR number Fuji OSCAR 81 or
FO-81.

I use the Fuji designation in recognition of the long history of contributions
the Japanese have made to Amateur Radio satellites.

I trust that Fuji OSCAR-81’s mission will be successful and much valuable date
collected.

73,
William (Bill) Tynan, W3XO
OSCAR Number Administrator