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<br />four multifunction communications boards with eight serial ports each, and 32 <br />modems. The VAX utilizes the VMS operating system. The system is designed to <br />handle in excess of 350 DCP's. The central computer is located in the <br />Centennial Building at the Office of the State Engineer. <br /> <br />The software, HYDROMET, was developed by the system contractor, Sutron <br />Corporation. It is comprised of real-time data processing and archiving <br />programs, alert/warning programs. reports and graphics output programs, and <br />system performance monitoring programs. The software is written in Fortran. <br /> <br />Three ISC 2427 color CRT terminals, a Sanyo MBC-775 color CRT terminal, a <br />Tektronix 4105A color CRT terminal, an LA 120 console printer, a 600 LPM <br />printer, and an ISC X-V color plotter are located in the Division of Water <br />Resources' Denver office. Each of the seven Division offices has been <br />provided with a Wang PC-XC3 computer having 256 KBytes of CPU. A memory <br />expansion board increases the memory by 512 KBytes. Each unit has a software <br />communications and productivity package, color display CRT terminal, printer, <br />and modem. Thirty-two EPSON HX-20 portable remote terminals have been dis- <br />tributed to field staff and water commissioners through the Division offices. <br />These terminals are capable of programming the DCP's via an RS-232 port and, <br />being equipped with acoustic couplers, can provide for system access via phone <br />communications. The DWR has tied into the state of Colorado microwave tele- <br />communications system. A line has been provided to each Division office to <br />provide for unlimited access to the system's central computer. <br /> <br />Figure 1 illustrates the system configuration. <br />Figure 2 illustrates the configuration of the Direct Readout Ground <br />Station. <br />Figure 3 illustrates the central computer hardware configuration. <br />Figure 4 illustrates the data management software configuration. <br /> <br />The communications link for data transmissions is the Geostationary <br />Operational Environmental Satellite (GOES). GOES is a series of federal <br />communications satellites operated by the National Oceanic and Atmospheric <br />Administration, National Environmental Satellite, Data, and Information <br />Service (NOAA-NESDIS). The GOES satellites are in an equatorial, geostationary <br />orbit at a point 22,500 miles in space. This type of orbit allows for a <br />continuous line-of-sight to be maintained with both remote transmitters and <br />the Direct Readout Ground Station. NOAA-NESDIS has provided the Colorado <br />State Engineer's Office with 183 transmission slots allowing for 183 DCP's to <br />transmit self-timed transmissions at separate 4-hour intervals, on channel <br />062. NOAA-NESDIS provided the use of a random reporting channel (118) for <br />transmitting emergency messages. Currently, no fees for the use of the GOES <br />Data Collection System (DCS) are charged to the State. <br /> <br />Originally, the complete use of channel 062 was given to the Colorado <br />State Engineer's Office. This provided for 240 individual transmission <br />slots. The State Engineer chose to cooperate with the Northern Colorado Water <br />Conservancy District, City of Colorado Springs, and the Bureau of <br />Reclamation-Loveland Projects Office, in sharing 61 transmission slots for use <br />by these entities in collecting and transmitting real-time water resources <br />data in Colorado. Fifteen transmission slots were provided on a temporary <br /> <br />-12- <br />