compensation circuits.
- Most of the commercial net pyradiometers or balance meters
use hemispherical windows to cover the circular or square
receiving surfaces (1 to 30 cm ). The material used is thin
polythylene, having an integrated transmission in the
spectral range from 0.3 to u.
- Plastic tube net radiometers are useful instruments for
measuring relative values of average net radiation inside
crop and forest canopies.
- By shielding one of the receiving surfaces and measuring
the temperature of the instrument, net pyrradiameters can
be used as pyrradiometers or pyrgeometers (for
determination of the downward or upward long wave
radiation). As the surface has an influence on the
terrestrial radiation near the ground, the exposure of ab bpyrradiometer needs to be chosen with care to be
representative for the neighbourhood.
Share with your friends: |
