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UNAVCO Resources: GNSS Antennas

UNAVCO Resources: GNSS Antennas

Dual frequency (L1/L2) Choke Ring Antennas provide geodetic-quality GNSS measurements for surveying, mapping, and research applications. Typical dual-frequency choke ring antennas maintain a stable phase center that has less than 1 mm of drift. The choke ring antenna is based on the geodetic research standard and features aluminum choke rings and a Dorne Margolin antenna element. These antennas are durable, have a low power consumption, and have excellent multipath rejection characteristics. Less-expensive but also high-precision options are now available as well. The UNAVCO Facility currently supports the following GNSS antennas.

GPS/GNSS Antennas Used by UNAVCO

Trimble Choke Ring
Ashtech Choke Ring
Trimble Zephyr Geodetic
Trimble Zephyr
Topcon PG-A1
no photo available
AOA TurboRogue SNR-800
no photo available
Trimble L1/L2 microcentered geodetic with groundplane
no photo available
Trimble Permanent L1/L2
no photo available
Trimble Geodetic Compact L1/L2
no photo available
Trimble 4000SST L1/L2 Geodetic
no photo available
Trimble 4000SSE Kinematic L1/L2
UNAVCO/Micro Pulse L1

Setting up GPS/GNSS Antennas

Development and Testing of GPS/GNSS Antennas

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Comments (5)
Comment by ANGEL REFUGIO TERAN CUEVAS on Tue, Nov 12th, 2019 at 6:09 PM
Dear Sirs., I would like to know which instrumentation has to be by using GNSS/GPS instruments for the monitoring of landslides. Actually I am looking to by the RTK GPS to make a campaign over high mountains in Mexico city with a high risk of landslides. Besides, I have USD 50,000 to spend buying equipment to implement a network and create an early warning to avoid a big disaster. Please help to decide a wich GPS RTK i have to use from the ones you have. Thanks a lot
Comment by Dr. Francesca Scire-Scappuzzo on Tue, Dec 13th, 2016 at 1:44 PM
Could I have the contact information of one of the GNSS antenna experts at UNAVCO? I developed a low-multipath GNSS antenna as Principal Investigator under a Phase I and Phase II NSF grant with in-kind UNAVCO support back in 2008. I now own 2 patents on this design. I would like UNAVCO to evaluate this wideband low-multipath GNSS antenna (the non cutoff FSS ground plane GNSS antenna) and compare it with other present GNSS solutions in the market. I have anechoic chamber tests that validate its excellent performance. Who should I talk to? I can send you my IEEE Transaction on Antenna and Propagation paper describing the design and its advantages. This is a well cited paper in the GPS geodetic antennas community. (title: "A low-multipath wideband GPS antenna with cutoff and non-cutoff corrugated ground plane". IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 57, NO. 1, JANUARY 2009. Best regards, Francesca Francesca Scire-Scappuzzo, PhD President and CEO, Ondetech LLC 955 Massachusetts Avenue, Suite 317 Cambridge, MA 02139 e-mail: fscire@ondetech.com
Comment by Christophe Vigny on Wed, Apr 10th, 2013 at 12:30 PM
looks like Trimble has made a new Zephyr antenna code TRM58295.00 which comes with recent Net-R9. do you know this one ? are they similar to the TRM55971.00 and TRM57971.00 ?
Comment by Jan on Tue, Feb 2nd, 2010 at 5:59 AM
Are there any reasons why there are not any other makes of choke ring antenna’s that have also been calibrated, like Leica AT504 and AR25 ?
Comment by Felipe G. Nievinski on Fri, Nov 13th, 2009 at 11:49 PM
Trimble has a third choke-ring antenna, code TRM59800.80 (active); see, e.g., IGS antenna file.
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Last modified: 2019-12-27  16:36:35  America/Denver