Topcon's HiPer Lite Bluetooth-enabled RTK GPS system includes an internal 915-MHz spread-spectrum radio for close-proximity GPS antenna operation. The unit offers L1/L2 C/A and P-code and carrier GPS reception and multipath reduction and provides GPs-enabled surveying up to 1.5 miles from the base station. RTK accuracy is a reported 10 millimeters (mm) + 1.5 ppm for L1/L2 and 15 mm + 2 ppm for L1. The unit uses internal lithium-ion batteries for more than 10 hours operating time. Topcon Positioning Systems, Inc., Pleasanton, California.
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