SN08

3/27/00

00 50.08 S LATITUDE
91 08.17 W LONGITUDE

General Location and Strategy: SN08 is part of the caldera floor grid. It is the southernmost point on the caldera floor, near a bull's eye formed by deformation as measured by Insar data (1992-1997).

Field Notes:

Days measured:  05 Jan 00 - 06 Jan 00

(S Caldera floor)

Monument SN08 is located in the center of a flat, vegetated pahoehoe flow, with many small cacti and grasses.  The station is approximately 70m south of a large cliff that continues westward to become the highest part of the sinuous ridge.  The large cliff north of the sulphur zone (not Azufre with the steam vent) continues eastward to become the cliff that is 70m to the north.  The next flat plateau north of this location continues west and becomes the eastern inside slope of the sinuous ridge.  There is a major caldera rim peak to the south.

Antenna height:  0.572m + 0.108m = 0.680m
 

Power up: 1420h (local), 05 Jan 00
Power down:  (lost power prior to 1230h (local), 07 Jan 00)
 

2000 Results:

Data from 3 GPS days were combined (1/5/00-1/7/00). Solution was made by fixing Base (SN01).
The first reported uncertainty uses the sigma of the coordinate group as a scaling factor and may be too pessimistic. The second uses the sigma of the single difference observations as a scaling factor.

X = -126498.3012 ± 1.7, 0.4 mm
Y = -6377186.508 ± 19.6, 2.2 mm
Z = -92320.7878 ± 2.6, 0.4 mm

Ht. 973.5867
Lat. -0 50 5.358069
Long. -91 08 10.948020