Tag Archive: HamVideo

Jun 13

Space Center Houston, TX, telebridge via ON4ISS

The ARISS contact on Tue 2017-06-13 15:19:26 UTC 84 deg with OR4ISS and Space Center Houston, Houston, TX, via ARISS telebridge ground station ON4ISS (Aartselaar, Belgium) was successful. Astronaut Jack Fischer K2FSH answered 15 questions. HamTV video was great, thanks to all European partners. The ARISS contact event will be an impactful part of Space …

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Introduction to digital satellite television technology

Gaston Bertels – ON4WF The Moving Picture Experts Group (MPEG) is a working group of authorities that was formed in 1988 by ISO (International Organization for Standardization) and IEC (International Electrotechnical Commission) to set standards for audio and video compression and transmission. First published in 1996, H.262 or MPEG-2 Part 2 is a video coding …

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Feb 13

FX0ISS-F4KJT ARISS-Europe HamTV demo successful

The ARISS contact between Collège Andre Malraux, Chatelaillon-Plage F4KJT and Thomas Pesquet KG5FYG/FX0ISS Mon 2017 feb 13 14:00:35 UTC 67 deg, was successful with 19 questions answered, the HamTV downlink was streamed on the new BATC merger facility, so the students, professors, public and media were totally impressed by the event. Live HamTV on 2395Mhz. …

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ARISS HamTV Minitiouner

Following the successful inaugural use of HamTV during ARISS Scheduled Contacts in the UK with ESA Astronaut Tim Peake, there has been much interest in radio amateurs establishing their own HamTV station. Jean-Pierre Courjaud, F6DZP, designer and implementer of the successful Tutioune series of software created a new USB connected DATV decoder and related software …

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European chained HamTV ground stations

To provide 10 minutes of HamVideo reception, a chain of ground stations located along the pass of the ISS footprint, is needed. In Europe, the following stations participate to this chain: For descending passes: EI9FHB, Cork, Ireland F6DZP, Poitiers, France IK1SLD, Casale Monferrato, northern Italy IZ7EVR, southern Italy (not operational) On the world map, one …

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Noise Power Measurement tool (NPM)

Noise Power Measuring Tool  Jean-Pierre Courjaud F6DZP wrote software to facilitate antenna setup. The Noise Power Measuring tool (NPM) can be used to measure the sun noise on S-band. A special version of Orbitron/whispDDE sends commands to the azimuth and elevation motors, providing offsets  from minus 10° to plus 10° from the sun coordinates. The …

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Tutioune 1600 receiving software

Jean-Pierre Courjaud F6DZP wrote dedicated software for the reception of HamVideo signals. The Tutioune 1600 software commands the TT S2-1600 PCI card and handles the transport stream. In ISS mode it also adds the missing DVB tables. The program not only delivers video and audio, but also provides technical parameters such as RF power and …

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HamTV reception with TT S2-1600 PCI card

Since 2014, ground stations have used the Techno Trend TT S2-1600 PCI card for reception of the DATV signals transmitted by the HamVideo transmitter. This card is not produced anymore, but some are offered for purchase on Ebay. The TT S2-1600 PCI card comprises: a zero tuner a QPSK DVB-S demodulator a Transport Stream to …

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HamTV Home Page

HamTV Status In principle, the HamVideo DATV transmitter is permanently transmitting from Columbus, the European ISS  module. The camera is not activated. These so-called “blank transmissions” are used by ground stations for fine tuning their setup. The transmit frequency is 2395 MHz. For different reasons, blank transmissions must be interrupted now and then. Scheduled “power …

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HamTV Power Levels

The HamVideo power levels in the table at the bottom of this page result from worst case computations, intended for the  evaluation of system efficiency. See Link budget computation by I0KPT. As shown in fig 2, the ISS orbits at about 400km above the surface of the earth. That is the distance between the ISS …

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