|
|
|
P643
Relative to fixed North America
|
| Segment: |
0 |
No-of-obs-used: |
894
|
|
Vel(mm/a) |
Vel-sig(mm/a) |
RMS(mm) |
StdDevObsUnitWt |
Vel-XYZ(mm/a):
|
| N: |
7.5 |
0.6 |
2.15 |
0.74 |
-4.2
|
| E: |
-6.6 |
0.6 |
3.41 |
1.10 |
6.0
|
| U: |
1.7 |
0.8 |
8.38 |
0.81 |
6.9
|
|
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)
|
|
