Tag Archive: HamTV

ARISS calendar with scheduled contacts by the ARISS operations team

The ARISS Operations Team meets weekly by telephone conference and much more frequently via e-mail and telephone. Activities coordinated by the ARISS operations team will be announced in this calendar. These are the ARISS school contacts, HamTV activities (other than blank transmission) and SSTV activities.   Calendar integration features On this page we show the …

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VK5ZAI

Station location: Kingston SE  South. Australia –  PF93VD Operator: Tony Hutchison, VK5ZAI VK5ZAI is an ARISS VHF-UHF telebridge station as well as a HamTV ground station.   Telebridge VHF-UHF system 10 turn helix 2m antenna crossed Yagi 20 + 20 70cm antenna VHF and UHF antennas are both about 5.5m long The reflector measures 4m …

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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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VK5EI

Station Location: South Australia, Adelaide, PF95GD Operator: Joe Pereira   Station Summary – 25th April 2017   Reflector:             Parabolic Prime Focus 1.8m mesh type Antenna:              S-band Patch feed, fabricated by James R Miller Converter:           Model 2400-HAMTV-DC, High Sierra Microwave Feeder Cable:    RG6 Quad Core / cable run 8 meters Rotator:               SPID  Model …

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VK4KHZ

Station location: Glenden Queensland Australia  QG48BU Operator: Shane Lynd, VK4KHZ VJ4KHZ is an ARISS VHF-UHF telebridge station as well as a HamTV ground station.   Below is a summary of the HAMTV equipment and any relevant findings observed or experienced during set-up at VK4KHZ in Queensland Australia. I have assembled three HAMTV stations at VK4KHZ, …

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IK1SLD

Station location: Casale Monferrato  North-western Italy  JN45FC Operator: Claudio Ariotti IK1SLD IK1SLD is an ARISS VHF-UHF telebridge station as well as a HamTV ground station.   Telebridge VHF-UHF system crossed Yagi 15 + 15, , both VHF and UHF Preamplifiers installed near the antennas: SSB SP-2 VHF and SHF MVV 432/2 UHF switching Hor or …

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Measuring DVB parameters for DATV reception

Adapted from a paper by Jean-Pierre Courjaud – F6DZP Gaston Bertels – ON4WF IQ Symbols and Constellations A DVB-S transmitter produces a continuous Transport Stream of data (see Introduction to digital satellite television technology). The Transport Stream modulates the RF carrier. In general, DATV uses QPSK modulation. The data transmitted are IQ Symbols or “Symbols” …

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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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SP3QFE

Armand Budzianowski, SP3QFE working on his HamTV dish  Most HamTV ground stations use a 1.2m dish. With accurate azimuth and elevation tracking, they receive the signal for 5 to 6 minutes during a favorable pass. For ARISS school contacts, 3 or more ground stations, located 800 km to 1000 km from each other along the …

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Minitioune Software

Minitioune Software by Jean-Pierre Courjaud F6DZP.  This screen shot shows the MiniTiouner receiving an excellent signal: Frequency: 1255MHz RF Power: -64 dBm MER: 31.8 dB (Modulation Error Ratio) – Digital S/N Ratio Constellations: strong concentration, proving excellent QPSK demodulation   The Minitioune software in Expert Mode  Central Panel  The tuner is never on the wanted …

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