8908 - Asgard


Location:  
	77 degrees 36 minutes S, 161 degrees 04 minutes E at an elevation of 1750 meters.

Hex id:
	8B317

Power:
	6 VDC supplied by RTG

Aerovane:
	Old was 12-78-16.  Wind direction polarity checked before removaland found to be reversed.  Therefore all wind direction data since 9 December 1980 needs to be corrected.  Wind speed generator had failed due to broken wire on slip ring just like at Marble Point.  New aerovane is 11-80-11 which is one of the new ones.  Note that this aerovane has not had slip ring solder joint reworked.

Deployed:
	5 February 1980 by Stanford University

Field Calibration: 
	28 November 1981 0400 Z by Stearns, Savage, Thompson and Lt. Whitlock

Parameter		Input			Test Set Output		Difference

temperature		-12.8 C			-12.7 C			+0.1 C
pressure		800.6 mb 		794.4 mb		-6.2 mb
inst wind speed		  2-4 m/s		  3.9 m/s		   ?
inst wind direction	    S			  181 deg		-------
mean wind speed		  2-4 m/s		  3.5 m/s		   ?
RTG voltage		  6.4 VDC		  5.0 VDC		-1.4 VDC


Modifications:
	
	1. Minimum thermomater installed.
	2. Reflective temperature probe shroud and insulating bushing installed.
	3. Aerovane replaced.


Comments:

	1. ARGOS Test Set did not function due to low battery voltage and lack of external power source.  As a result it was not possible to determine the wind speed accuracy as was done at other stations, but we suspect that this station reports winds 10 - 20% too high as is the case with all other stations that have been checked with ARGOS Test Set.
	2. The tower had blown over during the past winter.  We reinstalled the tower using heavier ropes and chain.  Theodolite was used to determine true north from a sun sight in order to correctly orient the aerovane.
	3. The correction for wind direction from 9 December 1980 until 28 November 1981 is:

		correct wind direction (deg) = 360 - old wind direction (deg)