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("LMI-stations")
 Earth station
"CENTER-2,5LMI"
These stations are
used in departmental, general
use and fixed networks via retransmitters LMI-1 (Locheed Martin
Corp.)
in a geostationary orbit within range 13750 - 14000 MHZ on transmission and 12500 - 12750 MHZ on recieve.
Using ES "CENTER-2,5LMI", depending
on a complete set the terminal equipment, it is possible to provide:
- The organization of a network of the fixed duplex digital directions of a satellite communication;
- The demand assignment multiple access mode (DAMA).
Information transfer
rate is up to 2048 kbps in a fixed directions mode and up to 64 kbps
in DAMA.
The basic characteristics:
| Antenna reflector effective diameter
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2,5 m (offset)
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| Polarization
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transmission
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linear vertical |
| recieving |
| Antenna gain
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transmission
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no less 48,6 dB
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| recieving
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no less 46,6 dB
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| Antenna's axial ratio
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no less 0,8
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| Range of angular movings of a reflector
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- at mechanical reinstallation on angle of elevation
0° - 60°
- at mechanical reinstallation on an azimuth ±60°
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| G/T (angle of elevation 10o)
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no less 26,8 dB/K
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| Power amplifiers
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from 1,5 to 25 W (depending on a required mode)
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| Inaccuracy of maintenance of the transmitter's output power
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no more than ±0,5 dB
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| Relative frequency instability of the transmitter and HF
(first) oscillator of the reciever
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no more than ±1x10-7
(during the month)
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Radio-frequency equipment — modem interface
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by frequency 70 MHz
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| Availability ratio of the station
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0,999
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| Power supply
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single-phase AC line 220 V +10%/-15%;
frequency 50±2,5 Hz
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| Power consumption
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to 300 W
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THE STATION HAS THE BUILT-IN UNIFIED CONTROL SYSTEM
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