SATCOM On-The-Move Model 17-27A Airborne Antenna

General Dynamics Mission Systems SATCOM-on-the-Move (SOTM) products share a legacy of proven, reliable performance on aircraft, ships, fast boats and a variety of military wheeled and tracked vehicles.The M17-27A was specifically designed for extended-duration airborne intelligence, surveillance, and reconnaissance (ISR) missions where beyond line of sight (BLOS) SATCOM capabilities are mission critical.

Military Satellite Communications On-The-Move

Our SATCOM On-the-Move® antennas provide reliable, high data rate satellite communications while on the move enabling secure, beyond-line-of-sight communications for vehicles in motion over rugged terrain.


Key to the performance of any SOTM product is the ability to maintain the link during dynamic platform motion. SATCOM-on-the-Move products provide world- class “on satellite” tracking accuracy via a combination of integrated tracking receiver and high-bandwidth line-of-sight stabilization. The modular design of the terminal leverages a common gimbal with band-swappable certified RF payloads enabling frequency band changeover within 5 minutes.

  • Full link performance maintained horizon-to-horizon through vehicle range of motion with elevation coverage to -10°
  • Rapid SATCOM frequency changeover by swapping a single modular RF payload
  • Embedded tracking receiver for rapid satellite acquisition independent of modem
  • Non-proprietary interfaces for power, Ethernet/serial, and L-Band IF Tx/Rx
  • Compatible with a wide range of commercially available modems
  • Modular design enhances maintainability, simplifies future upgrades and minimizes life cycle cost
  • Antenna includes the positioner, servo controller, tracking receiver, and the complete suite of RF components
  • Compliant to ARSTRAT (X), Skynet (X) and FCC ESAA requirements (Ku-Band)


Radome Not Included Ku
(Qual Complete Q2 2021) 
(Qual Completed 2020)
Frequency - Receive 10.95 to 12.75 GHz 7.25 to 7.75 GHz
Frequency - Transmit
13.75 to 14.50 GHz
7.90 to 8.40 GHz
Aperture Size
27 inches
2 Axis Az/El
≥ 30 Watts
≥ 50 Watts
G/T (Worst-case, 10° El, 23°C)*
≥ 14.0 dB/K
≥ 9.0 dB/K
EIRP (Linear Across Temperature)*
≥ 52.6 dBW
≥ 48.8 dBW
Beamwidth, 3 dB, Rx/Tx Midband
Sidelobes, Tx
FCC Compliant
Linear H/V or V/H (Continuous Rotation)
RH/LH Remotely Selectable
Transmit Cross Polarization with Tracking Accuracy
30 dB Typ, 26 dB Min
Azimuth Travel
360° deg continuous
Elevation Travel (Full Performance)
-10° to +83°
Elevation Travel (Total)
-10° to +87°
Polarization Travel
360° Continuous
Tracking Performance
FCC ESAA Compliant
(Pt Error < 0.2°, > 99.9%)
WGS / Skynet Compliant
Mean Time Before Failure (MTBF)
 ≥ 6000 Hours per MIL-HDBK-217
Aircraft Uninhabited Cargo, 60°C, 100% duty cycle
Satellite Acquisition Time
< 30 second cold start @ -40°C
< 5 seconds hot
Environmental Compliance
MIL-STD-810F tailored for airborne requirements
MIL-STD-461F Army Aircraft External
MIL-STD-704F (Tailored)
Lightning Protection DO-160 Sect 22 Level 3, Waveform 5A
Shock/ Vibration
6g, 11ms per MIL-STD-810F
4.60 g rms (Propeller aircraft) per MIL-STD-810F
Operating Temperature
(Within Radome)
-55°C to +60°C per MIL-STD-810F
-40°C Cold boot (< 3 min, < 1 min typical)
< 67 lbs
< 64 lbs
L Band IF Tx/Rx Range
950 to 1750 MHz
950 to 1450 MHz
< 600 Watts Continuous
* Excludes Radome Losses