A20 User Manual
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6.4.3
GPS Network
There are many kinds of GPS network designing such as tracking, alternately observation,
Tracking: Several receivers fixing at the certain points for a long time observation (such
as 1 year without stop), which is suitable for level AA control survey or perma-
Alternately observation: Several receivers fixing at the points of certain district, they also
need long time surveying (several days), after this procedure, change the receivers
to the other points of this district, then use the same surveying way. This mean can
eliminate the influence of SA. It is suitable for the GPS network survey of level A
Multi-base: While several receivers are fixing at the base points (like CORS) with long time
surveying, then we can use other rovers working in this net simultaneously. It is
suitable for level C and D survey.
Single-base: Use one receiver fixing at the base point working continuously, then use rovers
to do the surveying job around base point. These rovers do not need synchron.
As a rover fix at one point, one baseline is formed. Several rovers then can form
many baselines which have the same base point like a star. It is suitable for level
D and E survey.
Normal: This way is just the general way for customers. You just follow the manual and do not
multi-base, single-base, normal.
nent monitoring survey.
and B survey.
