AIDJEX Bulletin #40 - Polar Science Center - University of Washington

POSITION ACCURACY
To evaluate the quality of the position measurements, a period was chosen
for analysis in which little or no ice motion occurred. During that period,
14-24 February 1976, 500 fixes were taken at camp 1 (Caribou) and 500 at
camp 3 (Snow Bird). From the position of camp 3 and the distance between
camps as a function of time (Figs. 6 and 7), we deduce that ice motion was
less than 20 m for the period.
For each fix the radial error is defined as the vector from a reference
position to the fix position. Stand-alone results refer to fixes from a
single receiver (i.e., geographic accuracy). The reference position for these
is taken to be the ensemble median position defined by the ensemble median
W
W
g73-699
,* LONGITUIIE .
W
0
'73 =698
W
0
E 73 696 4
I- I50 m
73.695
..
.. . ...
. *
i
-144 =720
-144.725 -
-!44.730 5
W
0
-144 a735
0
3
-144.740 L
(3
z
-144 -750
t
-144 -755
LATITUDE
73-692
I I I I 1 I I I I I I 1 I ' '-144 -760
73 -690'
15 I7 19 21 23 25 27
FEBRUARY 1976
Fig. 6. Raw position fixes and smoothed filter output for station 3 during
period used to evaluate position accuracy.
91