Analysis of The Current Status of Low-Orbit Satellites (LEO)
1. General
The X-band satellite data receiving station with X / Y Pedestal is a 3.7-meter antenna tracking and receiving system, which can be used to receive and preprocess China FY3, US EOS / MODIS, China FY1 and US NOAA series (NOAA1571719) satellite data hardware and software platform system. It is a stable, reliable and practical satellite data platform. And a Scientific, scalable satellite data receiving and preprocessing system.
2. System Constitute
The Antenna servo&feed subsystem consists of a 3.7m reflector, L / X band feed ，ADU drive system ，and an ACU control system, GPS automatic time revising system, a 5.9M low-loss Radome.
Signal Demodulation Sub-system: LNA low noise Amplifier, first Converter, second Converter, Demodulator.
Data recording fast looking subsystem: data acquisition and frame synchronization, data fast viewing, data recording storage and management. Please check the block diagram of the L / X polar orbit satellite antenna tracking and receiving system.
3. Main technical indicators of the system
Technical Specification
|
Item |
Item |
Design index |
remarks |
| 1 | Diameter(m) | 3.7 | |
| 2 | Operating frequency MHZ | 7700～8400 | L 1700±20 |
| 3 | Polarization | LHCP/RHCP | |
| 4 | Orthogonal Polarization Isolation（dB） | ≥30 | |
| 5 | Antenna Efficiency | 59% | L：55% |
| 6 | Feeder loss（dB） | 0.15 | 0.55 |
| 7 | First sidelobe（dB） | -18 | |
| 8 | Axial ratio（dB） | ≤0.8 | L：1 |
| 9 | VSWR | 1.25 | |
| 10 | G/T value（dB/K） | 26.7（LNB55°K El 5°） | L：10 |
| 11 | Antenna system weight | 700kg | |
| 12 | Antenna radome | 5.9m | |
| 13 | Antenna radome loss | ≤0.3dB | L：0.7 |
| 14 | Wind load | 54m/sec(Survival) | |
| 15 | Total weight of antenna and antenna radome | ≤1.3 ton | |
| 16 | Travel range（°） | X：0～180
Y：0～180 |
|
| 17 | Travel range（°/sec） | X：0～3
Y：0～3 |
|
| 18 | Travel Acceleration（°/sec） | X：0～3
Y：0～3 |
|
| 19 | Axial angle resolution（°） | ≤0.005 | |
| 20 | Servo position resolution（°） | ≤0.01 | |
| 21 | Servo location accuracy°(rms) | ≤0.05 | |
| 22 | Orbit program tracking accuracy °(rms) | ≤0.07 | |
| 23 | Pedestal type | X/Y | |
| 24 | Backlash（′） | ±0.8 | |
| 25 | Control mode | Standby | |
| Manual speed | |||
| Preset position | |||
| Program tracking | |||
| Remote/local control | |||
| 26 | Screen display | X/Y command angle | |
| X/Y real angle | |||
| Error angleΔX/ΔY | |||
| Az/El angle | |||
| Time | |||
| Fault |
Related posts
