Figure la IERS Polar Motion
0."
X ~.2
~ .4
80
value vs 6-year moving average
85
A r
\
V \J
90
Date
1' 1
V
95
I
Figure lb IERS Polar Motion
0.8
_ 0 .6
~
~
~
~ 0.4
~
§
>- 0.2
o
80
I
value vs 6-year moving average
~
85
A r I
V
90
Date
r f
~
V \
95
100
Figure Ie
IERS Polar Motion
(6-year mOving average)
0.046 r - - - - - - -- - - -- - - ---,
~ 0.044
.e.
~
(I)
,.g 0.042
8 u
Q)
&. )( 0.04
0.038 '--_ _ -'-_ _ --'-_ _ _ .L...-_ _ -'--_ _ .....J
84
86
88
90
92
94
Date
Figure ld IERS Polar Motion
6-year moving average
0.33 r - - - - - - - - - - - -- - - - - - ,
0.32
j
.e. 0.31
Q)
iii
c:
~
§ 0.3
>0.29
rate =
+5 .61 masly
0.28'-----L--~---~---L--~
100
84
86
88
90
92
94
Date
Figures la and lb show the IERS pole series compared to a 6-year moving average; Figures
lc and ld present the rate obtained from a fit to the 6-year moving average values for X
and Y respectively.
157