Source: Seavey Engineering Associates Inc.
INMARSAT antennas have been manufactured and delivered since 1987. Standard "A" and "B" Ship Earth Station (SES) antennas are offered; these mount to stable platforms aboard oceangoing vessels. Low-cost, fixed-site and transportable antennas are also offered. For INMARSAT Standard "C", "M" and "Mini-M" terminals, omnidirectional and moderate-gain antennas of several types are also available.
In general, all INMARSAT antennas can be used to downlink GOES satellite data.
All INMARSAT antennas operate with right-hand circular polarization. The uplink frequency band is 1626.5 - 1660.5 MHz and the downlink frequency band is 1525.0 - 1559.0 MHz. All Seavey Engineering antennas are tested and certified for compliance with INMARSAT's strict gain, axial ratio and sidelobe envelope rolloff requirements.
Pictured above is: Model AS33-15C
Standard "A" 20dBic INMARSAT Antenna
Seavey Engineering Associates Inc., 28 Riverside Drive, Pembroke, MA 02359. Tel: 781-829-4740; Fax: 781-829-4590.