Geoscience Reference
In-Depth Information
65°
70°
75°
80°
85°
90°
95°
100°
105°
110°
115°
120°
125°
130°
135°
140°
145°
45°
45°
40°
40°
35°
35°
30°
30°
25°
110°
115°
120°
20°
20°
20°
15°
15°
10°
10°
15°
5°
5°
90°
95°
100°
105°
110°
115°
120°
125°
110°
Fig. 3.26 Distribution of stations of the Crustal Movement Observation Network in China
Table 3.3 Overview of Crustal Movement Observation Network of China
Datum network Basic network
Regional network
Number of points
25
56
1,000
Distribution
Domestic plates Domestic plates
Active areas of crustal
movement
Observation
Continuous
observation
Periodic repetition
observation
Irregular repetition
observation
Horizontal accuracy (mm)
-
2.5
1.8
Vertical accuracy (mm)
-
4.8
4.9
Accuracy of annual change in
baselines (mm)
1.3
-
-
Precision of orbit determination
(m)
0.5
-
-
CMONOC, have become the basic framework of China's modern geodetic survey
and basic surveying and mapping, playing an increasingly prominent role in
national economic development. The unique high precision of these networks
helps improve and reinforce China's traditional astro-geodetic networks, thereby
overcoming the disadvantages of the traditional astro-geodetic networks as having
inhomogenous accuracy and possible larger systematic errors that traditional mea-
surement methods cannot easily avoid. However, resulting from inconsistencies in
the principles and purposes of network design, the observation guidelines, time of
implementation, measuring instruments and standards, and methods of data
Search WWH ::
Custom Search