Permanent CORS Stations
National and regional reference station networks serving unlimited RTK rovers. The primary antenna class specified by government CORS standards.
AT- 45101CP
★ IGS + NGS Certified
Hi-Target · AT-45101CP
AT-45101CP 3D Choke Ring GNSS Antenna.
Sub-millimeter phase center stability. Maximum multipath rejection. IGS and NGS certified. The antenna that permanent CORS stations are built on — tracking every GNSS constellation plus L-Band.
Every centimeter of RTK accuracy your rovers deliver starts with the phase center stability of the reference antenna. The AT-45101CP's unique 3D choke ring design suppresses multipath interference in all three dimensions, achieving ≤±1 mm phase center offset — the tightest specification in the Hi-Target lineup. Certified by both IGS and NGS, it has been deployed in national CORS networks, power grid monitoring systems, and provincial reference station arrays worldwide.
≤±1mm Phase Center
≥7dBi Gain
IGS + NGS
All GNSS + L-Band
IP67
The Gold Standard
Every rover fix starts with this antenna.
A CORS station is only as good as its antenna. Multipath signals — radio waves bouncing off buildings, ground surfaces, and metal structures — are the primary error source in permanent reference installations. The AT-45101CP's 3D choke ring geometry suppresses these reflections across every GNSS frequency band including L-Band, maintaining sub-millimeter phase center stability regardless of satellite elevation angle or ground-plane conditions.
IGS and NGS certification means the antenna's electrical characteristics have been independently calibrated and published — every GNSS processing software in the world can correct for its specific biases. This is the antenna that national geodetic agencies, power utility companies, and government CORS operators trust for their most critical reference infrastructure.
3D Ring
Multipath suppression
360°
Elevation coverage
≤2dB
LNA noise figure
5kg
Solid construction
Antenna Performance
Four numbers that define reference-grade precision.
≤±1mm
Phase Center Offset
Sub-millimeter stability across all GNSS frequencies and satellite elevation angles.
≥7dBi
Maximum Gain
Strong signal reception even at low elevation angles where multipath is worst.
45dB
LNA Gain
High-performance low-noise amplifier with ≤2dB noise figure and ≤2 VSWR.
≤5ns
Differential Delay
Minimal differential propagation delay across the operating frequency range.
Key Features
Six reasons the AT-45101CP is the CORS antenna standard.
FEATURE 01
3D Choke Ring — multipath killed in three dimensions.
Traditional choke rings suppress multipath in a single plane. The AT-45101CP's unique 3D design extends rejection into all three spatial dimensions, achieving sub-millimeter (≤±1mm) phase center stability across every GNSS frequency band — GPS L1/L2/L5, BDS B1/B2/B3, GLONASS G1/G2/G3, Galileo E1/E5a/E5b/E6, QZSS, NavIC, SBAS, and L-Band. Every error you suppress at the antenna is an error that never reaches your rovers.
≤±1mm
Phase center stability across all frequencies
FEATURE 02
IGS + NGS Certified
Independently calibrated and published by both IGS and NGS. Processing software corrects for antenna-specific biases automatically. Required by most government CORS specifications.
FEATURE 03
Full GNSS + L-Band
Tracks all operational GNSS constellations plus L-Band PPP correction services. Dual-band coverage: 1160–1300 MHz (lower) and 1521–1621 MHz (upper).
FEATURE 04
High-Performance LNA
45 dB ± 3 dB gain, ≤2 dB noise figure, VSWR ≤2, pass-band ripple ±1.5 dB. Operates from 3–16 VDC at ≤45 mA. Low power, high signal quality.
FEATURE 05
Proven at Scale
Deployed in China Mobile HAP, national power grid monitoring systems, and provincial CORS centers. Proven reliability in 24/7 permanent installations spanning years of continuous operation.
FEATURE 06
IP67 · −45°C to +85°C · 5 kg solid build.
IP67 environmental protection against dust and temporary water immersion. Operating range from −45°C to +85°C covers every climate zone from arctic monitoring stations to Middle East desert installations. 95% humidity tolerance. Φ377mm × 271mm form factor with TNC connector. At 5 kg, the antenna provides the mechanical stability that permanent monuments require — no vibration, no wind-induced phase errors, no maintenance.
−45° to +85°C
Every climate zone — arctic to desert
Technical Specifications
Every detail. Documented.
| Signal Tracking | |
| GPS | L1, L2, L5 |
| GLONASS | G1, G2, G3 |
| BDS | B1, B2, B3 |
| Galileo | E1, E5a, E5b, E6 |
| Other | QZSS, NavIC, SBAS, L-Band |
| Antenna Performance | |
| Polarization | RHCP (Right-Handed Circular) |
| Antenna Axis Ratio | < 2 dB |
| Nominal Impedance | 50 Ω |
| Elevation Coverage | 360° |
| Maximum Gain | ≥ 7 dBi |
| Phase Center Offset | ≤ ±1 mm |
| LNA Performance | |
| LNA Gain | 45 dB ± 3 dB |
| Noise Figure | ≤ 2 dB |
| VSWR | ≤ 2 |
| Pass-band Ripple | ± 1.5 dB |
| Differential Propagation Delay | ≤ 5 ns |
| Operating Frequency | |
| Lower Band | 1160 MHz – 1300 MHz |
| Upper Band | 1521 MHz – 1621 MHz |
| Power | |
| Working Voltage | 3 – 16 V DC |
| Power Consumption | ≤ 45 mA |
| Physical & Environmental | |
| Dimensions | Φ 377 mm × 271 mm |
| Weight | 5,000 g (5 kg) |
| Connector | TNC |
| IP Rating | IP67 |
| Operating Temperature | −45 °C to +85 °C |
| Storage Temperature | −55 °C to +85 °C |
| Humidity | 95% |
| Certifications | |
| IGS (International GNSS Service) | Certified |
| NGS (National Geodetic Survey) | Certified |
Applications
Built for infrastructure that runs 24/7 for years.
Structural Monitoring
Bridge deflection, dam settlement, building tilt, and geological hazard arrays where sub-millimeter repeatability determines detection threshold.
Power Grid Infrastructure
Transmission tower monitoring and power grid GNSS timing networks. Deployed in China Mobile HAP and national power utilities.
Geodetic Networks
National geodetic datum establishment, tectonic plate monitoring, and first-order control survey campaigns requiring IGS-calibrated antenna models.
Meteorological Networks
GNSS meteorology and tropospheric delay estimation for weather prediction models using permanent station data.
Timing & Synchronization
GNSS-based precision timing for telecommunications, financial trading, and critical infrastructure synchronization.
Frequently Asked
Common questions about the AT-45101CP.
What is the AT-45101CP 3D Choke Ring GNSS Antenna?
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Hi-Target's flagship GNSS antenna with a unique 3D choke ring design. Sub-millimeter phase center stability (≤±1mm), ≥7dBi gain, 45dB LNA, full multi-constellation + L-Band tracking, IP67 protection. Certified by both IGS and NGS for permanent CORS installations.
What is a 3D choke ring and why does it matter?
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Concentric metal rings machined around the antenna element suppress multipath signals — radio waves bouncing off nearby surfaces. The AT-45101CP's 3D design extends suppression into all three dimensions, achieving ≤±1mm phase center offset. This is critical because every millimeter of reference antenna error propagates into every rover measurement downstream.
What does IGS and NGS certification mean?
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Independent testing and calibration confirming phase center offsets, gain patterns, and electrical characteristics meet global geodetic network standards. Published calibration files allow GNSS processing software to correct for antenna-specific biases — essential for millimeter-level accuracy. Most government CORS specifications require IGS or NGS certified antennas.
Which receiver should I pair with the AT-45101CP?
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The Hi-Target VNet8 CORS receiver (1408 channels, 64GB storage, unlimited NTRIP streams, IP68). TNC connector interfaces directly with VNet8's dual TNC ports. Sicher 3D offers VNet8 + AT-45101CP bundles with turnkey CORS installation across UAE and GCC.
How does the AT-45101CP compare to the AT-35101H?
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The AT-45101CP (5kg, ≤±1mm, ≥7dBi, IGS/NGS) is the premium choice for permanent CORS. The AT-35101H (460g, ≤±1.8mm, ≥5.5dBi) is a lighter geodetic antenna for mobile base stations and semi-permanent installations where weight matters. Both track full multi-constellation + L-Band.
What is the price of the AT-45101CP in Dubai?
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AT-45101CP pricing depends on configuration — antenna only or bundled with VNet8 receiver and turnkey CORS installation. Contact Sicher 3D at sales@sicher-3d.com or +971 50 108 0764 for authorized dealer pricing. Multi-station CORS network discounts available.
Build on the gold standard.
Talk to our engineers about AT-45101CP pricing, VNet8 bundles, and turnkey CORS station deployment across UAE and GCC.