8909 - Siple


Location:  
	75 degrees 56 minutes S, 84 degrees 15 minutes W.  Elevation approximately 900 meters.

Hex id:
	8B344

Power:
	6 VDC from power supply run off station power.

Aerovane:
	11-80-11 used for testing.  3-78-12 deployed.

Deployed:
	31 December 1981 by Siple crew.

Calibration: 
	25 November 81 0400 Z at Mcmurdo lab.

Parameter		Input			Test Set Output		Difference

inst wind speed		 38.9 m/s *		 44.6 m/s		 +15%
			 19.5 m/s *		 22.3 m/s		 +15% 
inst wind direction	  000 degrees 		  358 degrees	       	 -----
mean wind speed		 19.5 m/s		 22.3 m/s		 +15%
mean wind direction	  000 degrees		  000 degrees		 -----
anemometer		  .50 volts (1800 rpm)	  131 bits

	*Wind speed simulated with calibrated instrument


Modifications:

	1. RTG regulator diode removed.
	2. Heater circuit and diode removed.
	3. Low-output generator anemometer installed.  Voltage appears in frame 7 word 1.	
	4. Reflective temperature probe shroud and insulating bushing installed.
	5. Minimum thermometer installed.


Comments:

	1. Power consumption is 135 mA at idle: 1.5 A at transmit.
	2. Antenna used was the one returned from Asgard.  This antenna may have been damaged last season and should be replaced.
	3. Temperature and pressure input/output was measured and found to be in very good agreement, but numbers were not written down.
	4. 40 PS-6200 6-volt gel cell batteries. 8 2.5 watt solar panels and a shunt regulator should be sent down to Siple early next season so the AWS may continue to operate after closing.