Covering GPS L1 and SBAS frequency band, Models TW3150/52 employ Accutenna™ technology to provide optimized cross polarization rejection and multipath rejection. Model TW3150 features 4-stage dual filtered LNA, while Model TW3152 includes additional SAW pre-filter to provide rejection of close out-of-band signals and additional protection against saturation by high level sub-harmonic and L-Band signals. Both have permanent mount, IP67 and MIL-STD-801F Section 509.4 compliant housing.