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<br />I. PROGRAM DESCRIPTION <br /> <br />The monitoring system represents state-of-the-art technology in real-time <br />data collection. Although the system utilizes space age technology, it'is <br />relatively simple. Conventional data collection hardware and data processing <br />techniques have been incorporated into the system configuration. <br /> <br />A. System Configuration <br /> <br />The system is comprised of seven basic components: <br /> <br />1. Gaging stations <br />2. Remote data collection hardware <br />3. Transmission receive hardware <br />4. Central computer <br />5. Applications software <br />6. Computer terminals for data base access <br />7, Satellite communications link <br /> <br />The remote data collection hardware is generally installed at <br />pre-existing stream, diversion, and reservoir gaging stations. The hardware <br />interfaces with on-site sensors. The sensor may be either a float operating <br />in a stilling well hydraulically connected to the stream or reservoir, a <br />manometer or other type of pressure transducer, or a direct discharge meter. <br /> <br />The remote site data collection hardware installed in these gaging <br />stations includes a Data Collection Platform (DCP), an incremental <br />ana1og-to-digita1 shaft encoder, an environmentally secure NEMA enclosure, a <br />Vagi antenna, a 12-vo1t battery, a solar panel, and complimentary cables. The <br />DCP is comprised of a sensor interface module, a microprocessor, and a UHF <br />transmitter. The sensor interface module is capable of handling up to 16 <br />sensors. The microprocessor provides for programmable input of data measure- <br />ment and transmission scheduling, data manipulation, and data storage. The <br />DCP is programmable by utilizing a portable terminal via an RS-232 port. The <br />DCP measures approximately 10"xS"x4". The shaft encoder converts incremental <br />stage values from analog to digital in hundredth of a foot intervals. The <br />shaft encoder communicates directly with the DCP. The shaft encoders were <br />modified with digital displays/data resets. This provides for easy sensor <br />calibration and data display for station operators. The unit measures <br />approximately Slx6Ix6". The NEMA enclosure houses the DCP and the battery. <br />The unit measures approximately 24Ix20Ix10". <br /> <br />The transmission receive hardware basically consists of a 5-meter <br />parabolic dish, downconverter, receiver, amplifier, multiplexor, and eight <br />frequency agile programmable demodulators. This Direct Readout Ground Station <br />is located at the Centennial Building, the Office of the State Engineer. <br /> <br />The central computer is comprised of a DEC VAX 11/750 computer with two <br />456 MByte hard disks, two 9-track tape drives (100 ips streamer mode 25 ips), <br /> <br />-11- <br />