Hej!
Dagens nät med
SM4EFW
SM5HL
SM6NZV
SM7WSJ
*FOX-1 upp 2014
Ersättaren till den populära FM satelliten AO-51 har ju redan ordnat
sponsrad uppskjutning, så nu kan vi se fram mot en fin satellit för portabla
satellitkontakter.
AMSAT Fox-1 Launch Date Announced
NASA announced on May 13, 2013 that AMSAT’s Fox-1 spacecraft has been
assigned for launch in 2014 on the ELaNa XII mission. The expected orbit is 470 x 780
km at 64 degrees inclination. This orbit has a lifetime of about 11 years.
AMSAT Vice President Engineering, Tony Monteiro, AA2TX, reported that the
software development team successfully brought up the Fox-1 system software
on the Internal Housekeeping Unit (IHU). The IHU is the brains of the Fox-1
satellite and it has a 32-bit, STM32L microprocessor. The operating IHU card was
shown in the AMSAT Engineering booth at the Dayton Hamvention.
The Fox-1 Engineering Team will deliver the satellite for integration with
the launch vehicle during May, 2014 with the launch scheduled for November,
2014. Tony commented, “While this is later than we had hoped, it is well within
the normal variance of ELaNa launch dates and the extra time will be most
welcome for additional satellite testing. This is very exciting news and really puts the
focus on finishing the satellite and ground station software development.”
President Barry Baines says, “AMSAT’s focus on STEM education and development of
a cubesat platform capable of flying a science mission with a reliable communications link resulted in the selection of Fox-1 in the third round
and RadFxSat (Fox-1B) in the fourth round of NASA’s Cubesat Launch Initiative.”
All Fox cubesats are designed to host advanced science payloads to support
future science missions that help us to continue qualify for NASA ELaNa
(free) launches. The Phase 1 Fox satellites are 1-Unit CubeSats. They each include
an analog FM repeater that will allow simple ground stations using an HT and an
“arrow” type antenna to make contacts using the satellite. This was the mode
made so popular by AO-51. The Phase 1 CubeSats also have the capability of
operating in a high-speed digital mode for data communications. Phase 2 Fox
satellites will include software-defined-transponders (SDX) like the one
tested on ARISSat-1. These will be able to operate in a wide variety of analog and
digital communications modes including linear transponders. Since this
requires more power for reliable operation, these will probably all be 3-Unit
CubeSats.
Watch the AMSAT Journal and the AMSAT web (http://www.amsat.org) page for
more news and details.
*ISS kommer med videolänk på 2,4 GHz
Frequencies announced for HamTV from the International Space Station
Frequencies have been announced for the new Ham Radio Digital TV transmitter
that will send video from the ISS in the amateur radio 2400 MHz band.
The main mission of HamTV is to perform school contacts between the
astronauts onboard ISS and the scholarship, not only by voice, but also by
unidirectional video from the ISS to the ground within the ARISS program.
In addition to the existing VHF radio amateur station, ISS will host a
S-Band video transmitting station. This new equipment can broadcast images from the ISS
during the school contacts or other pre-recorded video images up to 24 hours
a day to allow ground stations tuning.
It is planned to transmit DVB-S signals on 2.4GHz at either 1.3Msps or
2.3Msps with 10 watts of RF from the ISS Columbus module. The IARU Amateur Satellite Frequency Coordination Panel have announced
frequencies of 2422.0 MHz and 2437.0 MHz.
HamVideo is the name of the onboard DATV S-band transmitter. HamTV is the
name of the complete system, comprising DATV downlink and VHF voice uplink.
Kaiser Italia SRL was the prime-contractor for the design and development of the flight
and ground segment http://www.kayser.it/index.php/exploration-2/ham-tv
Italian astronaut Luca Parmitano KF5KDP is planned to launch from Baikonur
in Kazhakstan to the ISS on May 28 (see High School Student’s RocketHub
Project). It is understood that the HamTV equipment will be carried to the ISS on the
Japanese HTV-4 spacecraft currently planned for a launch on August 4.
HamTV on Facebook https://www.facebook.com/Hamtvproject
More information from AMSAT-Italia at
http://www.amsat.it/Amsat-Italia_HamTV_brochure.pdf
Link Budget http://www.amsat.it/Amsat-Italia_HamTV.pdf
ARISS Antennas Installed on Columbus http://www.ariss-eu.org/columbus.htm
Vi hörs på 370 KHz nästa söndag.
73 Håkan SM7WSJ