18
3.2.4 Installing weather station
3.2.4.1 Site selection
Selecting an appropriate site for the weather station is critical in order to obtain accurate data. In
general the site should be representative for the area of interest and away from the influence of
obstructions such as buildings, trees and other objects that might disturb the measurements (e.g.
sprinklers). Use as rule of thumb:
h
10
distance
minimum
=
(5)
where
h
is height of the obstacle(s).
Checklist:
- Terrain must be free from obstacles that might influence the wind speed,
temperature and radiation measurements.
- Terrain must be flat. As the anchoring of the mast is based on 3 provided earth nails
the soil must be strong enough to keep the loads (also during rainy periods). If
one expects that this is not the case replace the anchoring by a concrete
foundation.
- A clear line-of-sight path between the antenna in the tower and the antenna at the
LAS
-receiver site in order to have a reliable RF telecommunication link.
- The site must NOT be located near commercial transmitters as their powerful signal
can overwhelm the RF radio modem leading to communication problems.
It is strongly advised first to check whether the selected site meets all above-mentioned requirements
before installing the weather station.
Summary of Contents for LAS
Page 1: ...Instruction Manual Large Aperture Scintillometer LAS...
Page 28: ...27 Figure 17 Operational weather station of LAS RET system...
Page 29: ...28...
Page 39: ...38...
Page 45: ...44...
Page 49: ...48...
Page 51: ...50 Figure 33 Configuration screen and default settings of supplied RF modems...
Page 55: ...54...
Page 69: ...68...
Page 71: ...70 APPENDIX 9 CONNECTION PLAN LAS BET LAS RET Figure 47 Connection plan LAS BET system...
Page 72: ...71...
Page 73: ...72 Figure 48 Connection plan weather station LAS RET system...
Page 74: ...73 Figure 49 Connection plan scintillometer LAS RET system...
