3/27/00

00 48.89 S LATITUDE
91 07.97 W LONGITUDE

(00 48.88 S LATITUDE)
(91 07.98 W LONGITUDE)

General Location and Strategy: SN 9 is located as close to the center of the caldera floor as we could get without dying.
 

Field Notes:

(Center of caldera)

Monument SN09 is located on top of the N edge of the 10m thick a'a flow in the center of the caldera.  The monument itself is a brass cap cemented into an outcrop of the massive interior of the a'a flow where it folded as it flowed down the flow front (cemented into a 20m high lava tube).  The site is ~10m SE of large cairn erected at the edge of the ridge.

Antenna height:  0.555m + 0.108 m = 0.663 cm

Power up:  1716 (GMT)/ 1116h (local), 07 Jan 00
Power down: 1958h (GMT), 08 Jan 00
 

2000 Results

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 and is obviously a gross underestimate.

X = -126118.7234 ± 2.6, 0.4 mm
Y = -6377201.726 ± 58.7, 3.2 mm
Z = -90100.8224 ± 3.4, 0.4 mm

Ht. 952.3270
Lat. -0 48 53.095595
Long. -91 07 58.664051

View from the north

View from edge of bench on way down northern caldera wall.