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Chapter II 9600 GPS Surveying System Operation |
Chapter II 9600 GPS Surveying System Operation
3. Take out receiver, install it on the centering apparatus and lock it tightly.
2.5 How to measure antenna height
After mount the instrument, user should measure antenna once at the beginning and the end
of every period of time, please ensure the accuracy reach mm level. When surveying, we usually
measure from the center point on the ground to the waterproof loop of antenna. That is an inclined
height. Please refer to fig 2-5.
Chapter II 9600 GPS Surveying System Operation
3. Take out receiver, install it on the centering apparatus and lock it tightly.
2.5 How to measure antenna height
After mount the instrument, user should measure antenna once at the beginning and the end
of every period of time, please ensure the accuracy reach mm level. When surveying, we usually
measure from the center point on the ground to the waterproof loop of antenna. That is an inclined
height. Please refer to fig 2-5.
Fig2-5 Measuring antenna height
We use a formula to calculate antenna height.
H = h2 - R2 + h £¨ 2-3£©
0
0
"h" is the inclined height that measure from point on the ground to the waterproof loop of
antenna.
R is the radius of antenna, which is 99mm.
0
h is the distance from antenna phase center to the middle of antenna, which
0
is 13mm.
H is the calculation result. We usually measure antenna height twice and
adopt the average.
Attention: We input the inclined height as the antenna height, which is the
inclined distance from point on the ground to the waterproof loop of antenna. |
