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<br />1981. For this same period, an average of 6.2 stations (6.5%) was not <br />reporting because of (1) transmitting problems, (2) dead batteries or (3) <br />scheduled power-down for repair or service. An average of 14.5 stations (15%) <br />was reporting definite data quality problems with one or more parameters. An <br />additional 6.3 stations (6.7%) exhibited suspicious data returns for one or <br />more parameters. <br /> <br />The total operational season extended 88 days from 11 May through 6 August <br />1981. From Table 11.5 one can calculate a total of 8356 PROBE station-days <br />(94.95 stations by 88 days) where platforms were installed. Ideally from Table <br />II.5, 8448 PROBE station-days (96 stations by 88 days) should have been <br />available for data collection. <br /> <br />Eighty-six stations were equipped to monitor 7 different parameters while <br />the other 10 stations were instrumented to monitor solar radiation as an eighth <br />parameter. A potential total of 60,016 parameter-days (88 days by 7.104 <br />parameters/station by 96 stations) of data could have been collected. Because <br />stations were inoperative an average of 6.5% of the time, 3928 parameter-days <br />of data were estimated lost during an 88-day field season. If a suspicious <br />data day and a data problem day each had only one malfunctioning instrument, an <br />additional 1831 ((556+1275) by 1 errored parameter) parameter-days 0.1%) of <br />lost data by 1 error would increase the total to 5759 (9.6%) parameter-days of <br />lost data. If a suspicious data day and a data problem day each had a maximum <br />of 7.104 'malfunctioning instruments, the total amount (28.5%) of lost data <br />would increase to 16,894 parameter-days ((547+1275) parameter-days by 7.104 <br />errored parameters). From this data an average of between 69 and 87 (71.5 - <br />90.3%) PROBE stations were shown to perform satisfactorily during the course of <br />CCOPE operations. <br /> <br />C. FIELD OPERATION TERMINATION AND DISMANTLING <br /> <br />1. STATION POWER-DOWN <br /> <br />CCOPE field operation concluded on 6 August 1981. After termination of <br />field operations, the PROBE stations were powered-down beginning on 6 August <br />.1981 and concluding on 10 August 1981. For each station power-down a routine <br />shut-down procedure (Figure 11.2) was implemented to record specific platform <br />voltage data. For 32 of the 86 stations, a more intensive calibration check <br />(Figure 11.3) of syst4~m voltage and frequency data was performed. Batteries <br />and Data Collection Platforms (DCP's) were removed during the power-down <br />routine. The remainder of the platform and associated equipment were left to <br />be disassembled and rl~turned to Miles City later. <br /> <br />2. "PROBE" PLATFORM DISASSEMBLY AND REMOVAL <br /> <br />On 24 August 1981 the PROBE mesonet disass~nbly and platform transfer to <br />project headquarters in Miles City was begun. A team of 2 to 6 people <br />generally worked in 2--person crews dismantling .:md removing PROBE platforms and <br />site enclosures. Dismantling included the disassembly of all PROBE equipment <br />and the removal of thE! fenced enclosures. Equipment was packaged and serial <br />numbers were recorded (Figure 11.4) whenever possible. The materials were <br />loaded on pickup trucks or stacked at the site for later pickup. Electronics <br />were always removed from the site at the conclusion of dismantling. <br /> <br />15 <br />