ARLA/CLUSTER: A transmissão do sinal digital de video da ISS pode vir a ter por base um Raspberry Pi

[João Costa > CT1FBF]

Raspberry Pi could generate ISS HamTV video

The ARISS meeting minutes for August 16, 2016 cover the discussion
about using a Raspberry Pi computer board to generate video to feed
the ISS Digital ATV transmitter

An idea was proposed by Jean-Pierre Courjaud F6DZP for using Raspberry
Pi at the transmitting ground stations for generating a H264 video
stream that modulates a DVB-S or DVB-52 carrier. His report was
distributed to the ARISS team on August 12, 2016.

Discussion:  Jean-Pierre Courjaud had brought this idea to a Ham TV
Technical (HTT) meeting for using Raspberry Pi to generate a H264
video stream. Raspberry Pi is used in the United Kingdom for DATV on 2
meters.

Gaston Bertels ON4WF termed this a cost effective solution, probably
easy to work on, many people and schools would be able to receive
video from the ISS, and he inquired if this idea was proposed for the
Paolo Nespoli IZ0JPA flight next year. Jean-Pierre Courjaud related
that Paolo Nespoli had asked about it, and the team hopes he could use
it if the idea is presented for review to the ARISS-International
Technical Evaluation & Support Committee and approved by ARISS
Delegates.

Jean-Pierre Courjaud explained that Raspberry Pi could be a solution
for two things—first, the webcam could be used instead of the onboard
ISS camera, and second, signals received by schools could be
transmitted back to the crew.  Frank Bauer KA3HDO felt the astronauts
would like this.

Dave Taylor W8AAS asked about the type of receiver schools would need
and how signals would be uplinked.  Jean-Pierre Courjaud clarified
that schools would have a narrowband ATV receiver that uses a USB
dongle; this would bring the signal to the Surface Pro computer that
Paolo Nespoli plans to fly on ISS, and modified mini-tutioune software
would decode the uplink signal received from the L-band antenna.

Dave Taylor inquired what new hardware would have to be tested and
certified for flight.  Jean-Pierre Courjaud said that Nespoli plans to
take the Surface Pro, and to be tested and launched would be the USB
interface that would work with the L-band antenna and serve as an
L-band receiver with the Surface Pro. During Nespoli’s mission the
mini-tutioune software could be uploaded to his Surface Pro.

Oliver Amend DG6BCE planned to share the meeting discussion with
Emanuele D’Andria I0ELE and ask him and the committee, because the
project originated with AMSAT-Italia, to give the plan, including what
must be tested and launched, to Mark Steiner K3MS, chair of the
ARISS-International Technical Evaluation & Support Committee.

Read the full ARISS Meeting Minutes August 16, 2016 at
http://www.ariss.org/meeting-minutes/august-2016