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Hemisphere A25 Antenna

The A25 utilises superior multipath mitigation technology to support millimetre accuracy for land and marine applications. The A25™ GNSS Antenna has been designed to support millimeter accuracy on land and marine applications. The A25 GNSS antenna offers support for present and future GNSS signals, including GPS, GLONASS, BeiDou, and Galileo. A25 is a multi-GNSS precision antenna and is ideal for various applications including surveys, single-frequency RTK positioning and navigation, precise guidance, and machine control. Use the A25 antenna in challenging environments (such as near buildings and foliage) as it has superior multipath mitigation, stable phase center and strong SNR’s, even at low elevations. The ruggedized housing utilized by A25 is made of an aluminum base that has been pretreated for the marine environment and will withstand salt, fog, and spray. The antenna easily passes the two-meter pole drop test.

Additional product info

Product details

  • GPS L1
  • Beidou B1
  • Galileo E1
  • SBAS
  • L-Band
  • Aluminium and Lexan construction

Package includes

  • A25 Antenna
  • 5/8″ Threaded Base


Hemisphere’s A25 Antenna is the antenna for those looking for more reliability and accuracy than traditional single frequency antennas. Unlike many other traditional single frequency antennas, the A25 receives corrections not only from GPS, but also GLONASS, BeiDou, Galileo and SBAS. This is the antenna that is capable of integrating multiple constellations when determine position, giving you a more reliable constellation. This is the antenna that will give you stronger SNR’s even at low elevations. This is the antenna that you can rely on to give you can accurate position even in challenging conditions. This is the antenna

The A25 Antenna is also built to last. With an IP69K environmental rating, this is the antenna that will last you for years to come. Whether you need to use this antenna on land or sea, this is the antenna that can withstand spray, fog and salt without any issues. On top of this, the antenna boasts a EP455 vibration and shock rating. This is the antenna that you can take to the places you need to work. There is no need to worry about this antenna falling apart on you. This is the antenna you buy for tomorrow, and for years into the future.

Key Features

GNSS Sensor

  • GPS L1
  • BeiDou B1,
  • Galileo E1, SBAS, and L-band
  • GNSS Frequency: 1.525 to 1.615 GHz
  • LNA Gain: 30 dB
  • LNA Noise: 2.0 dB, typical
  • L-Band Sensor
  • L-Band Frequency: 1.525 – 1.585 GHz
  • L-Band LNA Gain: 30 dB

Power Input

  • Input Voltage: 3.3 to 12 VDC
  • Input Current: 12 mA, typical


  • Enclosure: Aluminum base with Lexan™
    plastic cap
    Dimensions: 4.7 H x 15.2 D (cm)
    1.8 H x 6.0 D (in)
    Weight: .40 kg (.88 lbs)
    Mount: 5/8 inch female thread
    RF Connector: TNC (straight)
    Storage Temperature: -40° C to +85° C (-40°F to +185°F)
    Operating Temperature: -40° C to +70° C (-40°F to +158°F)
    Enclosure Rating: IP69K
    Shock and Vibration: EP455
    Phase Center Variation: Less than 2 mm at GPS L1, for
    elevations above 15 degrees


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