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Hemisphere GPS has launched A52 and A21, two antennas that are ideal for applications including post-processed geodetic surveys, machine control, precise mapping and surveying.

A52 is a multi-GNSS (GPS L1/L2/L5, Glonass L1/L2, Beidou, SBAS, Omnistar, and Galileo E1/E5a and b) precision antenna that is ideal for various applications including RTK positioning and navigation and precise guidance.

The antenna can be used in challenging environments (such as near buildings and foliage) as it has good multipath mitigation, a stable phase centre and strong SNRs even at low elevations.

The A21, which is already used for aerial application guidance and flow control, is now available for precise mapping and surveying.

It receives GPS L1, SBAS and Omnistar L-band signals.

The A21 antenna is designed to maintain its tracking of GPS and differential correction signals in high electrical ‘noise’ and interference environments and in dynamic applications where the antenna may be turned on its side.

Both the A52 and A21 feature a rugged enclosure with an IP69K environmental rating, a metal base and 5/8in threaded connectors for secure mounting to survey poles, tripods, vehicle mounts and more.

The A52 includes both right angle and straight TNC connectors for pole or flush mounting and A21 includes a straight TNC connector.

The US National Geodetic Survey has published the antenna calibrations for the A52 and A21.

The antennas wideband cross-dipole design technology is the basis of two pending Hemisphere GPS patents.

The A52 and A21 antennas are available through the Hemisphere GPS Precision Products global dealer network.

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