Environmental Engineering Reference
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Figure 9-3. Azimuthal response factors measured in the field compared to those mea-
sured in the laboratory.
Frequency = 63 MHz (Ch. 3). [data: Sengupta
et al.
1981a]
Figure 9-4. Typical modulation of a TV power signal by a secondary signal scattered
by an operating wind turbine.
The turbine is the two-bladed 2.0-MW Mod-1 HAWT.
Modulation frequency is twice the rotor speed of 10 rpm. (a) Antenna pointed at the wind
turbine (b) Antenna pointed at the transmitter [Sengupta
et al.
1981a].
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