HamTV system delivered to the ISS

The hardware for a system to transmit digital TV over the over the amateur radio station on the ISS was carried aboard the Japanese HTV cargo module recently launched to the station .

There has been slow scan TV but not true video over the ISS ham system. This document gives the history and status of efforts to implement video transmission : Ham Video: A DATV transmitter on Columbus – AMSAT.org – 2013 (pdf).

From the latest AMSAT News Bulletin:

 HamTV Transmitter Launched to ISS

On Saturday, August 3 at 1948 UT the Japanese HTV-4 cargo vessel was successfully launched to the International Space Station (ISS). On-board was the HamTV transmitter and a number of CubeSats carrying amateur radio payloads.

The Japanese space agency JAXA has announced details of four CubeSats on the launch. They will be deployed from the ISS by the JEM Small Satellite Orbital Deployer (J-SSOD) between October 2013 and
March 2014.

The four CubeSats are:
• PicoDragon a 1U CubeSat developed by Vietnam National Satellite Center(VNSC), University of Tokyo, IHI aerospace. CW beacon on 437.250 MHz and 1k2 AFSK AX.25 telemetry on 437.365 MHz
• ArduSat-1 and ArduSat-X 1U CubeSats developed by Nanorack, NanoSatisfi. ArduSat-1 437.325 MHz 9k6 MSK CCSDS downlink. ArduSat-X 437.345MHz 9k6 MSK CCSDS downlink.
• TechEdSat-3 a 3U CubeSat developed by NASA Ames Research Center

The company NanoRack has announced it is sending 36 Units of CubeSats to the ISS (believed to be 26 separate CubeSats, some 2U or 3U in size). At the time of writing it is believed they will be going on a later cargo vessel.

The main mission of HamTV is to perform contacts between the astronauts on the ISS and school students, not only by voice, but also by unidirectional video from the ISS to the ground within the ARISS program.

The ESA Columbus module on the ISS will host the 2.4 GHz video transmitting station in addition to the existing 144 MHz FM amateur radio 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 2.4 GHz at either 1.3Msps or 2.3Msps with 10 watts of RF.

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

Read the HamTV overview paper here.

HamTV Link Budget
http://www.amsat.it/Amsat-Italia_HamTV.pdf

HamTV on Facebook
https://www.facebook.com/Hamtvproject

ARISS DATV Antennas Installed on Columbus
http://www.ariss-eu.org/columbus.htm

Spaceflight story – Japan’s HTV-4 launches supplies and science to
the ISS http://tinyurl.com/ANS-216-C

Italy, the Moon, and a passing moment on the ISS

Italian astronaut Luca Parmitano on the International Space Station posts some beautiful pictures and a wonderful description of seeing his country at night from space:

Moon-rise-1024x679[1]The edge of the Moon is seen through high altitude noctilucent clouds.

Parmitano writes vividly about his view from the Cupola:

Using my torch, I enter Cupola and slowly, deliberately, I open each window, one after the other. Even though there are just a matter of minutes left before we fly over Italy, we are still above central Africa, where a raging monsoon stretches to fill my entire field of vision, from one horizon to the other, for hundreds of kilometres. In the darkness of the orbital night, lightning flashes an unreal light on one of the most beautiful scenes I have ever seen. The blue light streaks across my view, flaring from dozens of storm cells. With a frantic, syncopated rhythm worthy of the greatest percussionists, the white clouds lit up by the lightning momentarily rip open the black African night, made darker by the absence of street lighting. There is a violence to it that I can almost feel from up here, 400 kilometres above the highest clouds. The lack of thunder lends a surreal air to the storms, and the silence is deafening.

[…]

Looking towards the north, I see the Balearic Islands fully lit, and I consciously refrain from looking east straight away: I want to savour these moments. Beneath me, through Cupola’s central window, I see Tunis, Hammamet and then Sfax, and I realise there’s not much time left. Through the window right in front of me, lit up like village streets in Carnival, I see one of the most overwhelming sights I’ve ever seen as an astronaut: an unmistakable shape, completely cloudless, the boot of Italy lies perfectly outlined by lights that run continuously from the tip of Calabria to the Ligurian coast, tracing its profile like a brand-new constellation in the nocturnal depths of the Mediterranean Sea. Sardinia and Corsica, not as bright as the rest, move slowly across the scene, and on the north-eastern horizon, a violent storm seems to ravage central Europe, from Austria to Germany. From up here, Naples and Rome proudly dominate the scene, radiating a splendour above all other cities. But Bologna, Florence, Milan, Turin – they are all visible, thousands of kilometres away. Vesuvius forms a dark circle in a land utterly saturated by light.

[…]

It’s late, and tomorrow will be a long day. With those lights still filling my eyes, I slowly close the seven windows and cross the Station to return to my sleeping pod. Not even dreams could replace the beautiful reality that revolves, oblivious, beneath us.

Mediterraneo[1]

Astronaut Barbie from Mattel

Mattel puts Barbie into space. And a new space collectible is born. Remember not to open the package!

 

A list of 5 underrated sci-fi movie “masterpieces”

I will have to track down the two of these that I have not seen: The Five Underrated Sci-Fi Movie Masterpieces – TIME.com

Video: Perpetual Ocean

Perpetual Ocean is a cool visualization of some of the world’s surface ocean currents.

Everyone can participate in space