The APS-3L high-precision GNSS survey receiver has L-band capability to work with the new TERRASTAR-D—a satellite differential service by Veripos for land-based surveying. When out of wireless range of terrestrial UHF radios or cellular networks, the system seamlessly transitions to L-band satellite for continuous decimeter-level precise-point positioning. This feature is ideal for remote regions and harsh environments. Altus Positioning Systems. 310-541-8139.