AWS ID: 8910B SITE NAME: SIPLE LOCATION : LAT 75.90 S LONG 84.30 W SIPLE STATION HEIGHT : 900 M (ESTIMATED) DATE ACTIVATED: 26 NOVEMBER 1983 LAST VISITED : 26 NOVEMBER 1983 SENSORS SERVICED SENSOR PROBLEM ACTION TAKEN AEROVANE(03-78-10) INSTALLED PRESSURE GAUGE(17490) INSTALLED TEMP PROBE EXT INSTALLED TEMP PROBE INT INSTALLED HUMIDITY PROBE NONE DELTA-T PROBE NONE FIELD CALIBRATION CALIBRATION DIFFERENCE VARIABLE AWS MEASURED AS 83/84 AS 82/83 AS 81/82 PRESSURE 859.5 859.7 MB .2 MB - - TEMP EXT 15.0 13.0 C -2.0 C - - TEMP INT - - - - - WIND SPD 4.0 3.5 M/S .5 M/S - - WIND DIR 285 280 DEG -5 DEG - - LABORATORY CALIBRATION CALIBRATION DIFFERENCE VARIABLE AWS MEASURED AS 83/84 AS 82/83 AS 81/82 PRESSURE 994.7 994.3 MB .4 MB - - TEMP EXT 0.12 0.0 C -.12 C - - TEMP INT 15.5 16.0 C .5 C - - WIND SPD .249 M/S/BIT CAL - - WIND DIR 180 SOUTH OK - - HUMIDITY - - - - - DELTA T - - - - - COMMENTS: AWS 8910B WAS PLACED IN OPERATION AT SIPLE REPLACING AWS 8909. AWS 8910B IS POWERED BY 3 BOXES OF BATTERIES AS SIPLE STATION WILL BE CLOSED FOR TWO YEARS. THE FIELD CALIBRATION WAS DONE USING STATION READINGS WHICH WERE TAKEN SOME 500 METERS AWAY FROM THE AWS UNIT. THE BOOM WAS PLACED AT ABOUT 4 METERS AND ELECTRONICS BOX AT 3 METERS TO ALLOW FOR 2 YEARS OF SNOW ACCUMULATION.