Rotorcraft has the characteristics of fast speed, low altitude, flexible mobility and free from geographical conditions, it plays an important role in aerial forest protection, supplies delivery, emergency rescue and disaster relief, search and rescue, and major event security. Based on the design features of communication satellites and combined with the complementary advantages of traditional wide-beam satellites, the general aviation airborne satellite broadband communication service with "high bandwidth rate, wide coverage range and excellent service quality" is launched for each application scenario of rotorcraft. The service realizes the connection with the ground satellite earth station and the ground communication network through the antenna terminal installed on the aircraft, which effectively guarantees the safe production of the aircraft during the operation and improves the operation efficiency.

GA300 is a satellite communication system designed for small and medium-sized rotorcraft (manned & unmanned) general aviation aircraft, which enables the aircraft to carry out real-time video backhaul, IP calls and broadband Internet access through the satellite during the flight, and has the characteristics of small volume and light weight.

MODEL	GA300
Dimension (diameter*height)	Φ440mm×415mm
weight	≤13.5kg
Frequency range	RX：12.25～12.75GHz     TX：14.00～14.50GHz
Type	Panel waveguide horn array
Receive G/T(pitch 10°）	8.8dB/K（Normal temperarure@27℃,LNB noise factor @0.8dB,Radome excluded）
transmit EIRP(dBW)	47.5dBW（40W BUC，Radome excluded）
GAIN（RX）	29.5dB@12.50GHz
GAIN（TX）	30.5dB@14.25GHz
Cross pollsolation	≥30dB
Power consumption	90W(excluded BUC）
Azimuth range	360°continuous rotation
Pitch range	0°～90°
AZ/EI Velocity	＞60°/s
AZ/EI acceleration	＞100°/s2
Tracking accuracy	≤0.2°（R.M.S）
DC power	DC 18~32V
Operating temperature	-40℃ ~ +75℃
altitude	16800Meters(55000Feet)

As an important part of the satellite communication link, the airborne satellite communication control terminal MODMAN highly integrates the modem (Modem), control unit (ACU), video codec, etc. The terminal has the functions of signal processing, system control, video and voice output.

MODMAN Technical Parameter（Inside antenna equipment）

MODEL	specification
Dimension	L416mm×W220mm×H110mm
weight	≤6.5kg
DC Power	DC18~32V
Power	60W
Operating Temperature	-20℃ ~ 60℃

1）MODEM Technical Parameter

Item	Specification
IF interface	Frequency range：950~2150MHz，Step in 100KHz Tx signal level range：-35~-5dBm，1dBm Step in In-band Spurious output：≤-50dBc Rx signal level range：-65~-25dBm
Modulation Mode	QPSK
Information Rate	64kbps~4096kbps，64kbps Step in
Spread Spectrum Ratio	2 times spread spectrum, 4 times spread spectrum (small spread spectrum mode)
Form Coefficient	0.35、 0.25、 0.2
Error Threshold	Eb/n0=2.7dB，Pe≤1×10-6
Channel Coding	LDPC code

2）Encoder Technical Parameter