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| FDMA Helicopter with HSA40
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Mitsubishi Electric delivered the world’s first helicopter
satellite communication system (HSA40) to Japan’s Fire and
Disaster Management Agency (FDMA) at the end of March.
The HSA40 system can transmit high-speed and real-time
aerial video of disaster areas from helicopters. It began
operating in early April after installation of the on-board
components in Kyoto City Fire Department helicopter and of
ground station facilities at both the Kyoto City Fire Department
and the FDMA in Tokyo.
In the Heli-TV system currently used in disaster photography,
TV images are transmitted from the helicopter to a ground
relay station. This requires the establishment of relay stations
and transmissions are prone to disruption due to mountains or
buildings, sometimes resulting in blank image zones.
The new system has been devised to overcome such
problems. Video and voice data are sent from the helicopter
to a communications satellite and then transmitted directly to
ground stations without the need for relay stations.
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The HSA40 system uses technology which synchronizes
data signals with the rotor blades to ensure stable and
uninterrupted transmission. It also uses the latest H.264/
MPEG-4 Advanced Video Coding image compression
technology to realize high-resolution images. Other features
include bi-directional voice and data communication between
helicopter and ground stations, as well as retransmission of
video and information via ground
communication networks or ground
stations.
The system is attracting much
attention for its importance in the initial
stages of a major disaster when it
enables information from the disaster
area to be gathered rapidly and allow
the most appropriate emergency
measures to be taken. |
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Antenna inside the radome
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■http://www.MitsubishiElectric.com/news/2013/0328.html
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