Department of the Interior, U.S. Geological Survey, 345 Middlefield Road,Mail Stop 285, Menlo Park, CA 94025-3591

58 -- CONTINUOUS MONITORING GPS RECEIVERS DUE 071698 POC Richard C. Schwaberow, Contracting Officer, (650) 329-4177, fax (650) 329-5517 The U.S. Geological Survey, Hawaiian Volcano Observatory, Hawaii National Park, Hawaii, has a requirement for 3 each of a continuous monitoring GPS receivers. This requirement is posted as "Process to Availability of Funds". Receiver operational capabilities and characteristics: Channels: 12 L1 C/A or P-code 12 L2 P-Code Full wave length phase and code tracking even under A/S Measurement accuracy: L1 C/A or P-coe: <5 cm RMS, 1 sec. L1 carrier phase: 1 mm RMS, 1 sec. L2 P-code: <5 cm RMS, 1 sec. L2 carrier phase: 1 mm RMS, 1 sec. Memory: At least 10 Megabyte of protected internal memory Data Ports: At least two independent bi-directional, programmable RS-232 serial ports Physical: operating temperature: Receiver: -20 degrees to +55 degrees C Antenna: -40 degrees to 65 degrees C water resistance: Sealed. Rain Resistant power: <15 watts, 10 to 31 VDC with reverse polarity and over voltage protection. Lower power (<10 watts) preferred Other Receiver: external freguency input RTK firmware with reverse capability External sensor input: Automatic logging of meterorological or tilt datga from serial port into GPS data file Session Programming Real-Time dat aoutputs Remote monitoring capability Accessories: Power supply: AC to DC power supply 11/220 VAC, 50/60 Hz Cables: Two DC input power cables Two RS-232, DB-9 cables for transferring serial I/O data Antenna: High precision, choke ring ground plane with Dorne- Margolin dipole antenna element. Phase center stability to be better than 1 mm. Antenna must be scribed with a North arrow Hemispherical radome 30 meter antenna cable Software: Remote software: Must allow complete control of receiver through RS-232 connected radio or modem Remote download software: Must allow automatic download of data with no loss of data and deletion of download files through RS-232 connection with radio or modem. Automatic conversion to RINEX file format The U.S. Geological Survey prefers that the above software run on a UNIX Solaris V. 2.5 platform, but will accept software running on Windows 95/NT platforme Documentation: complete operating manuals, Instrument case: reusable shipping case for receiver Posted 07/01/98. (0182)

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