Hemisphere GNSS - Flat base. 1" threaded plate & 5/8" adapter included
The A21™ antenna is designed to help maintain tracking of GPS, GLONASS, BeiDou, Galileo, 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.
![Hemisphere V200-N SX6 Smart Antenna [10 Hz, sFreq mGNSS] No BT/WIFI](https://cdn11.bigcommerce.com/s-hnp9xp8a58/images/stencil/500x659/products/409/865/IMG-V200-N_SX6_SMART_ANTENNA_10_HZ_SFREQ_MGNSS_NO_BT_WIFI__94370.1725021819.jpg?c=1 "Hemisphere V200-N SX6 Smart Antenna [10 Hz, sFreq mGNSS] No BT/WIFI")
![Hemisphere V200-N SX6 Smart Antenna [10 Hz, sFreq mGNSS] BT/WIFI Capable](https://cdn11.bigcommerce.com/s-hnp9xp8a58/images/stencil/500x659/products/410/857/IMG-V200-N_SX6_SMART_ANTENNA_10_HZ_SFREQ_MGNSS_NO_BT_WIFI__19969.1725019661.jpg?c=1 "Hemisphere V200-N SX6 Smart Antenna [10 Hz, sFreq mGNSS] BT/WIFI Capable")
![Hemisphere V133 SX6 GNSS Compass [20 Hz, sFreq, mGNSS]](https://cdn11.bigcommerce.com/s-hnp9xp8a58/images/stencil/500x659/products/414/854/IMG-V133_SX6_GNSS_COMPASS_20_HZ_SFREQ_MGNSS__77043.1725019345.png?c=1 "Hemisphere V133 SX6 GNSS Compass [20 Hz, sFreq, mGNSS]")
![Hemisphere V200-S SX6 Smart Antenna [10 Hz, sFreq mGNSS] BT/WIFI Capable](https://cdn11.bigcommerce.com/s-hnp9xp8a58/images/stencil/500x659/products/411/858/IMG-V200-S_SX6_SMART_ANTENNA_10_HZ_SFREQ_MGNSS_BT_WIFI_CAPABLE__72762.1725019736.jpg?c=1 "Hemisphere V200-S SX6 Smart Antenna [10 Hz, sFreq mGNSS] BT/WIFI Capable")
![Hemisphere HGNSS V500 Kit [20 Hz, sFreq, mGNSS] Atlas Capable](https://cdn11.bigcommerce.com/s-hnp9xp8a58/images/stencil/500x659/products/403/825/IMG-HGNSS-V500_KIT_20_HZ_SFREQ_MGNSS_ATLAS-CAPABLE__88339.1725015522.png?c=1 "Hemisphere HGNSS V500 Kit [20 Hz, sFreq, mGNSS] Atlas Capable")
![V133 GNSS Compass [20 Hz, sFreq, mGNSS]](https://cdn11.bigcommerce.com/s-hnp9xp8a58/images/stencil/500x659/products/323/883/IMG-V133_GNSS_COMPASS_20_HZ_SFREQ_MGNSS__83426.1725268321.jpg?c=1 "V133 GNSS Compass [20 Hz, sFreq, mGNSS]")