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- GNSS - Model A21 - Antenna
GNSS - Model A21 -Antenna
The A21 antenna is designed to help maintain tracking of GPS and differential correction signals in challenging environments. Sometimes keeping the antenna level and away from electrical noise is just not possible. With a metal base, lower profile, improved multi-path mitigation, and ability to filter out an additional 30 decibels of radio band frequencies, A21 offers superior noise rejection. The A21 is designed for use with Hemisphere GNSS Crescent® and Crescent Vector™ II receivers.
- Athena™ RTK engine and Atlas® L-band global corrections
- Dual hot-swappable lithium batteries provides 12 hours of battery life
- Wi-Fi, UHF, Cellular, and Bluetooth communication ports
- Multi-Frequency, Multi-GNSS (GPS, GLONASS, BeiDou, Galileo, QZSS)
The S321+ receiver is powered by the Athena RTK technology. With Athena, S321+ provides state-of-art RTK performance when receiving corrections from a static base station or network RTK correction system. With multiple connectivity options, the S321+ allows for RTK corrections to be received over radio, cell modem, Wi-Fi, Bluetooth, or serial connection. S321+ delivers centimeter-level accuracy with virtually instantaneous initialization times and cutting edge robustness in challenging environments.
The S321+ receiver also enables users to work with the Atlas service. Atlas is Hemisphere’s industry leading global correction service, which can be added as a subscription to the S321+. The Atlas system delivers world-wide centimeter-level correction data over L-band communication satellites. With Atlas, S321+ users are able to experience sub-decimeter positioning performance anywhere on earth, without the need to be nearby a GNSS or communication infrastructure.
Atlas L-band has the following benefits:
- >Positioning accuracy - Competitive positioning accuracies down to 2 cm RMS in certain applications.
- >Positioning sustainability - Advanced position quality maintenance in the absence of correction signals, using Hemisphere’s patented technology.