Entry-level (Civil)
Entry-level integrated solutions are available from Calian (Tallysman) and others but are often limited to handling just 1 or 2 interferers (e.g., inadvertent in-band interference or small plug-in jammers).
If the interferers are largely ground-based, an alternative option for this kind of scenario is to use a specialist GNSS antenna with a reception pattern designed to suppress signals received at low elevations; Helix Geospace's Horizon Nulling Antenna (HNA) is a good option.
Find out more about our HNA
Mid-level (Civil)
With the rapid rise in GNSS disruption worldwide, civil applications are increasingly experiencing more than just 1 or 2 simple interferers.
Mid-level CRPAs aim to combat these increasingly sophisticated attacks through providing more nulls (to handle multiple simultaneous jammers), greater null depth (to combat high-power jammers) and widen support to protect both high and low GNSS bands.
CRPAs such as the NovAtel GAJT-410ML, Calian CR8894SXF+, Roke Nav-Sync Armour, and Tualcom TUALAJ 8200 are representative of this mid-level category, and typically protect a couple of GNSS bands (often L1 & L2), mitigate a larger number of jammers (3 nulls/band; 6 in total), and with an increased ability to neutralise the jamming signals (30-40dB null depth).
But this is often not enough...
High-level (Civil & Defence)
In heavily-contested GNSS environments, such as in or near to conflict zones, the volume and severity of GNSS interference and jamming can often result in complete denial of service.
Tackling such environments requires a considerable step-up in performance and capabilities across the board.
CRPAs at this high-end extend protection to many more GNSS bands to improve resiliency; widening support to other satellite constellations beyond GPS also boosts satellite availability thereby improving redundancy and achieving a better position fix.
Jamming suppression is also boosted through creating more nulls (typically 6/band; 12 in total) and with greater null depth (50dB; >90dB J/S), although resource constraints in some CRPA designs results in a trade-off between the number of bands and nulls per band that can be achieved.
Compared to the mid-level CRPAs described previously, these military-grade CRPAs also tend to be much larger (12x), heavier (7.5x), and power-hungry (2x), as well as being considerably more expensive. Understandable perhaps when targeted at military vehicles, but unsuited to the majority of civil applications.
It became clear that what was missing in the market was a CRPA capable of delivering high performance, but engineered down to a size and price point suitable for civil applications.
Helix Geospace set out to address this gap in the market, developing a CRPA capable of delivering the military-grade jamming performance that is now essential for all GNSS applications, but in a form factor and at a price point that ensures that the CRPA is accessible to a wide range of defence and civil applications.
Helix Geospace CRPxTM breaks the mould
CRPx is unique in being able to combine military-grade performance in a compact, lightweight and affordable form factor.
1 Size, Weight and Power, and Cost
L1/E1, L2, L5/E5a+b
3 GNSS bands; GPS + Galileo
>50dB jamming suppression
Military-grade
6 nulls/band; 12 nulls total
Military-grade
Ø120mm x 30mm; <500g
2-5x smaller & lighter than Defence/High-end alternatives
Ultra-low power (~3W)
5-10x lower power than Defence/High-end alternatives
UK/EU/NATO provenance
Developed and manufactured in the UK, and backed with full UK/EU/NATO supply chain provenance.
...whilst also maintaining full GNSS system compatibility
Many CRPA designs sacrifice GNSS signal linearity and phase coherence in their pursuit of higher anti-jamming performance.
Not so, with Helix Geospace's CRPx.
CRPx delivers excellent phase coherence, enabling use with carrier-phase GNSS systems (e.g., RTK) for more precise positioning.
CRPx maintains signal integrity, ensuring seamless compatibility with GNSS receiver anti-spoofing algorithms and Galileo OSNMA authentication.
Engineered for a wide range of applications
Maritime
GNSS is critical for navigation in modern maritime operations but increasingly under threat.
Learn more
Drones (UAVs)
Resilient GNSS in a compact form factor is fundamental to the operation of drones & UAVs.
Learn more
Military UxVs
Unmanned aerial and surface vehicles (UxVs) are revolutionising modern warfare but crucially dependent on resilient GNSS.
Learn more
Civil Aviation
Mitigating inadvertent GNSS interference from conflict zones is paramount to ensuring the safety of aircraft and crew.
Learn more