Section 1. Preparation and Siting
1.1.3 Solar Radiation
Pyranometers should be located to avoid shadows on the sensor at any time.
Mounting it on the southern most (northern hemisphere) portion of the weather
station will minimize the chance of shading from other weather station
structures. Reflective surfaces and sources of artificial radiation should be
avoided.
1.1.4 Soil Temperature
The measurement site for soil temperature should be at least 1 m
2
(10.76 ft
2
)and
typical of the surface of interest. The ground surface should be level with
respect to the immediate area of 10 m (32.81 ft) radius.
Standard measurement depths:
10.0 cm ± 1.0 cm (4" ± 0.4") (AASC)
5.0 cm, 10.0 cm, 50.0 cm, 100.0 cm (2", 4", 19.7", 39.4") (WMO)
H
10H
10T
Height of tree (T)
Logan, Utah
MADE IN USA
FIGURE 1.1-1. Effect of Structure on Wind Flow
1-2
Summary of Contents for ET107
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