Hong Kong Aerospace Satellite Tracking and Control Limited

The ground station is equipped with a set of S and X-band satellite measurement and control signal capture, tracking, measurement and control signal sending and receiving and other functions can achieve all-weather and all-day data reception.
Working frequency
X-band remote control: 7.19 GHz ~7.25GHz;
X-band telemetry: 8.3GHz～8.4GHz;
X-band data transmission: 7.9GHz~9.0GHz;
S-band telemetry: 2200～2300MHz;
S-band remote control, 2025～2120MHz;
System G/T value
Under the conditions of clear sky, gentle wind, antenna elevation angle 7°, and ambient temperature 23°C, the field discharge
Output port test:
1) X band: G/T ≥ 25.0 + 20log[f（GHz）/8.35]dB/K;
2) S band: G/T ≥ 11.0 + 20log[f（GHz）/2.25]dB/K;
Antenna gain
1) X-band reception: ≥48.5 + 20lg[f/f0]dBi (f0=8.35GHz)
2) X-band emission: ≥47 + 20lg[f/f0]dBi (f0=7.2GHz)
3) S-band reception: ≥37+20lg[f/f0]dBi (f0=2.25GHz)
S-band emission: ≥36+20lg[f/f0]dBi (f0=2.075GHz)
Power amplifier index
1) X-band power amplifier, output power ≥80W, adjustable range not less than 20dB;
2) S-band power amplifier, output power ≥80W, adjustable range not less than 20dB;
Telemetry remote control indicators
a) Telemetry unit
1) Information rate: 1kbit/s～64kbit/s;
2) Code type: NRZ-L, M, S;
3) Frame length: 4 words ~ 2048 bytes;
4) Format length: 2 frames ~ 256 frames;
5) Frame synchronization code group: 16bit, 24bit, 32bit;
b) Remote control unit
1) Information rate: 1kbit/s～32kbit/s.
2) Code type: NRZ-L, M, S.
High bit rate data transmission indicators:
a. Number of channels: supports 2 channels at the same time,
b. It has BPSK, QPSK, 8PSK and 16PSK signal modulation/demodulation functions and can support expansion;
c. Support differential decoding, ViterBi decoding, RS decoding, and LDPC;
d. Supports frame synchronization and descrambling. The descrambling complies with CCSDS standard requirements. The initial phase and polynomial can be set;
e. The data transmission channel has blind equalization capability;
f. Downlink data transmission of the whole station: 2×10Mbps~2×600Mbps (when the rate is ≥450 Mbps, the antenna capture angle is ≥10°);
g. High code rate demodulator symbol rate: continuously variable per bit;
1) BPSK: 5Mbps～300Mbps;
2) QPSK, S/OQPSK: 20Mbps～600Mbps;
3) 8PSK: 30~900Mbps;
4) It has the ability to expand high-order modulation.
h. Demodulation (including decoding) loss: bit error rate is in the range of 1E-5~1E-7;
1) Eb/No deviates from the theoretical value ≤1.5dB (30Msps＜symbol rate＜150Msps);
2) Eb/No deviates from the theoretical value ≤ 2.5dB (symbol rate ≤ 30Msps, symbol rate ≥ 150Msp s)