Transcript
Helicopter Satellite Communications System (HSA)
Direct transmission from helicopter
●Burst modem synchronization through blade rotation ●Steady transmission everywhere without interruption from mountains or buildings ●10Mbps high-definition video transmission＊1 (＊1)Transmission rate depends on the satellite conditions.
Newly developed lightweight parabolic antenna, strong FEC（LDPC）and H.264 codec enables high-speed, high-definition video transmission from the helicopter. Stable transmission technique（time diversity reception and intermittent transmission）avoids satellite signal blockage by blade rotation.
Photographs courtesy of：Institute for fire safety and Disaster Prepardness Eurocopter Japan Co.,Ltd. 1) Disaster photograph：INSTITUTE FOR FIRE SAFETY & DISASTER PREPAREDNESS 2) Helicopter photograph：EUROCOPTER JAPAN CO., LTD.
Automatic tracking system captures satellite instantly and keeps tracking while in flight or hovering.
Entire system can be controlled from a ground station, including bandwidth assignment for multiple helicopters and bidirectional voice communication between helicopters and ground stations.
Helicopter Satellite Communications System (HSA) Standard Specifications Item
Description
Remarks
System Operating Frequency
Transmission：14.00∼14.40GHz Reception：12.25∼12.75GHz
Function
Video transmission、interactive wireless call、data transmission
Transmission Method
Return link：Transmission timing synchronized with blade rotation Forward link：Time diversity
Career Assignment
PAMA method
DAMA optional
Antenna & Transceiver Antenna
0.4mφ parabolic antenna
Satellite Tracking System
Conical scan + Rate sensor
Polarization
Linear V/H or H/V selectable
EIRP
45dBW standard
Modulation & Demodulation Modulation Method
Return link：BPSK or QPSK, Forward link：BPSK
Error Correction Method
LDPC
Transmission Rate＊
Return link：384kbps∼10Mbps, Forward link：16∼64kbps
Operational Requirements Maximum Speed
160kt
Maximum Altitude
11000ft
Pitch Angle
±30°
Bank Angle
±20°
Others
Outdoor Equipment
Indoor Equipment
Power Supply
28VDC < 850W
Operating Temperature
−25°C∼50°C
0°C∼40°C
Dimensions(mm)
Antenna with redome：600φ×560 Transmitter：460×450×130
490×360×530
Weight(kg)
Approx. 30
Approx. 20
(＊)Transmission rate depends on the satellite conditions.
■ Helicopter ( HSA) Block Diagram
■ Ground Station Block Diagram
Voice
Antenna （0.4m diameter）
TX/RX
overlay
RFU （Transceiver unit）
TX RX
Modem （DVB-S2 modulator）
Operation panel Location information Video
ACU （Antenna controller）
GPS antenna
ICS
（Ｉ ｎ ｔ ｅ ｒ ａｃ ｔ ｉ ｖｅ）
Rotation timing
Magnetic pick-up
H.264 codec
AV system
Camera
Transmitter-receiver devices
TX RX
Microphone and speaker Modem （DVB-S2 modulator）
H.264 codec Video/Audio devices
HSA equipments
System ｃontroller
Audio/Video equipments Helicopter equipments
■ HSA System Equipment Indoor equipment
Outdoor equipment Auto-tracking antenna
ACU
Codec
Modem
RFU
HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN http://www.mitsubishielectric.com
Contact: Satellite Communications Marketing Dept. Phone: +81-3-3218-3346 Email:
[email protected]
E-E02-1-B8804-C HQ1209 (MDOC) Printed in Japan
© Copyright 2011 Mitsubishi Electric Corporation. All rights reserved.
New edition June 2011 Specifications are subject to change without notice.
