|
|
|
P681
Relative to fixed North America
|
| Segment: |
0 |
No-of-obs-used: |
811
|
|
Vel(mm/a) |
Vel-sig(mm/a) |
RMS(mm) |
StdDevObsUnitWt |
Vel-XYZ(mm/a):
|
| N: |
-0.8 |
0.7 |
2.26 |
0.74 |
-1.2
|
| E: |
-2.5 |
0.7 |
4.57 |
1.46 |
3.7
|
| U: |
-4.9 |
0.9 |
7.29 |
0.74 |
-4.0
|
|
Error bars are plus/minus
one standard deviation
Error bars on individual observations
= formal-error x scale-factor.
Currently the scale-factors are:
N:3.0, E:4.0, U:3.0
Red points are positions determined using final orbits
Blue points are positions determined using preliminary orbits
|
Vel-stddev = sqrt(WN**2+RW**2)
where WN is a white noise contribution
from propagating the error bars
on the observations
and RW is a random walk contribution
(= a*sqrt(timespan)/timespan
where a is 0.001 m/yr**1/2)
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