SATCOM On-The-Move Model 20-20M Terminal

General Dynamics’ SATCOM-on-the-Move (SOTM) Model 20-20M series terminals provide proven, high data rate, reliable X, Ku or Ka satellite communications while on-the-move. Leveraging a combination of integral tracking receiver, gyro stabilization, and inertial measurement unit, SOTM terminals provide vital access to voice, video and data in areas where terrestrial communication systems such as cellular, cable and radio have been damaged, overwhelmed or simply don’t exist. And while these terminals are sensitive enough to accurately receive satellite communications, they are also rugged enough to perform in the most challenging environments.

  • Reliable high data rate satellite communications while on-the-move
  • Interchangeable X, KU and KA band payloads
  • Modem Agnostic
  • Lightweight and rugged to withstand the harshest environments

 

Features

SOTM terminals are available in a variety of sizes and configurations and have a long history of proven, reliable performance on aircraft, ships, fast boats and a variety of wheeled and tracked vehicles including HMMWV, Bradley and Stryker. The Model 20-20M series terminals share a common technology base, components and user interface with other products in the SOTM family (Models 17, 24 and 30).

  • Reliable high data rate satellite communications
  • Superior link availability and performance over a wide range of operational conditions
  • RF bands provide maximum operational flexibility, including Ku, Ka MIL, Ka Commercial and X Band.
  • Leverages a wide range of commercially available modem systems
  • Modular design enhances maintainability and minimizes life cycle cost
  • Lightweight, low profile design with all RF Components on Elevation Payload for high efficiency RF Tx/Rx
  • Antenna includes the antenna positioner, servo controller, tracking receiver, block up and down-converters and high efficiency solid state power amplifier all contained on the pedestal with interface for Power, Ethernet and L-Band Tx/Rx interface to modem

Specifications

Ku Ka (MIL) Ka (COM) X
Frequency - Receive 10.95 to 12.75GHz 20.20 to 21.20 GHz 19.20 to 20.20 GHz 7.25 to 7.75 GHz
Frequency - Transmit
13.75 to 14.50 GHz
30.00 to 31.00 GHz
29.00 to 30.00 GHz 
7.90 to 8.40 GHz
Model Number
M20-20M Ku
M20-20M Ka MIL
M20-20M Ka COM
M20-20M X
Aperture Size
20.5 inches
Pedestal
2 Axis Az/El
SSPB P1dB
25 Watts
13 Watts 13 Watts  25 Watts 
G/T Typ at Midband (30° El, 25°C)
12.6 dB/K
15.9 dB/K
15.4 dB/K
8.3 dB/K
EIRP Typ at Midband and P1dB 
48.0 dBW
52.7 dBW
52.5 dBW
43.1 dBW
Beamwidth, 3 dB, Rx/Tx Midband
3.2°/2.7°
1.9°/1.3°
2.0°/1.4°
5.3°/4.9°
Sidelobes, Tx
FCC VMES Compliant
MIL-STD-188-164A 
MIL-STD-188-164A
MIL-STD-188-164A
Polarization
Active Pol Alignment
Circular, RH/LH or LH/RH, or RH/RH, or LH/LH Remotely Selectable
Transmit Cross Polarization at 1 dB Down
30 dB Typ, 26 dB Min
N/A
N/A
N/A
Axial Ratio inside 1 dB BW, Rx/Tx
N/A 1.5/1.0
1.5/1.0
<1.2 dB
Environmental/EMI
MIL-STD 810G / MIL-STD-461G (Land-Army
Azimuth Travel
360° deg continuous
Elevation Travel (Full Performance)
0° (horizon) to +80°
Elevation Travel (Total)
0° (horizon) to +95°
Polarization Travel
360° Continuous
N/A
N/A
N/A
Tracking Performance
FCC VMES Compliant
< 0.20° – 99% of the time during Churchville B conditions
Satellite Acquisition Time
< 5 sec hot, < 5 min from cold start
Height
24.5 inches
Diameter Radome
23.7 inches
Diameter (Footprint at Base)
27.5 inches
Weight
125 lbs.
145 lbs.
Operating Temperature
-40°C to +49°C
L Band IF Tx/Rx Range
950 to 1750 MHz
1000 to 2000 MHz
1000 to 2000 MHz
950 to 1450 MHz
Supply Voltage
28 VDC per MIL-STD-1275E*
Power
350 Watts Continuous, 800 Watts Peak (theoretical)
  • Features

    Features

    SOTM terminals are available in a variety of sizes and configurations and have a long history of proven, reliable performance on aircraft, ships, fast boats and a variety of wheeled and tracked vehicles including HMMWV, Bradley and Stryker. The Model 20-20M series terminals share a common technology base, components and user interface with other products in the SOTM family (Models 17, 24 and 30).

    • Reliable high data rate satellite communications
    • Superior link availability and performance over a wide range of operational conditions
    • RF bands provide maximum operational flexibility, including Ku, Ka MIL, Ka Commercial and X Band.
    • Leverages a wide range of commercially available modem systems
    • Modular design enhances maintainability and minimizes life cycle cost
    • Lightweight, low profile design with all RF Components on Elevation Payload for high efficiency RF Tx/Rx
    • Antenna includes the antenna positioner, servo controller, tracking receiver, block up and down-converters and high efficiency solid state power amplifier all contained on the pedestal with interface for Power, Ethernet and L-Band Tx/Rx interface to modem
  • Specifications

    Specifications

    Ku Ka (MIL) Ka (COM) X
    Frequency - Receive 10.95 to 12.75GHz 20.20 to 21.20 GHz 19.20 to 20.20 GHz 7.25 to 7.75 GHz
    Frequency - Transmit
    13.75 to 14.50 GHz
    30.00 to 31.00 GHz
    29.00 to 30.00 GHz 
    7.90 to 8.40 GHz
    Model Number
    M20-20M Ku
    M20-20M Ka MIL
    M20-20M Ka COM
    M20-20M X
    Aperture Size
    20.5 inches
    Pedestal
    2 Axis Az/El
    SSPB P1dB
    25 Watts
    13 Watts 13 Watts  25 Watts 
    G/T Typ at Midband (30° El, 25°C)
    12.6 dB/K
    15.9 dB/K
    15.4 dB/K
    8.3 dB/K
    EIRP Typ at Midband and P1dB 
    48.0 dBW
    52.7 dBW
    52.5 dBW
    43.1 dBW
    Beamwidth, 3 dB, Rx/Tx Midband
    3.2°/2.7°
    1.9°/1.3°
    2.0°/1.4°
    5.3°/4.9°
    Sidelobes, Tx
    FCC VMES Compliant
    MIL-STD-188-164A 
    MIL-STD-188-164A
    MIL-STD-188-164A
    Polarization
    Active Pol Alignment
    Circular, RH/LH or LH/RH, or RH/RH, or LH/LH Remotely Selectable
    Transmit Cross Polarization at 1 dB Down
    30 dB Typ, 26 dB Min
    N/A
    N/A
    N/A
    Axial Ratio inside 1 dB BW, Rx/Tx
    N/A 1.5/1.0
    1.5/1.0
    <1.2 dB
    Environmental/EMI
    MIL-STD 810G / MIL-STD-461G (Land-Army
    Azimuth Travel
    360° deg continuous
    Elevation Travel (Full Performance)
    0° (horizon) to +80°
    Elevation Travel (Total)
    0° (horizon) to +95°
    Polarization Travel
    360° Continuous
    N/A
    N/A
    N/A
    Tracking Performance
    FCC VMES Compliant
    < 0.20° – 99% of the time during Churchville B conditions
    Satellite Acquisition Time
    < 5 sec hot, < 5 min from cold start
    Height
    24.5 inches
    Diameter Radome
    23.7 inches
    Diameter (Footprint at Base)
    27.5 inches
    Weight
    125 lbs.
    145 lbs.
    Operating Temperature
    -40°C to +49°C
    L Band IF Tx/Rx Range
    950 to 1750 MHz
    1000 to 2000 MHz
    1000 to 2000 MHz
    950 to 1450 MHz
    Supply Voltage
    28 VDC per MIL-STD-1275E*
    Power
    350 Watts Continuous, 800 Watts Peak (theoretical)
  • Literature

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