FCC 1.959 Revised as of October 1, 2007
Goto Year:2006 |
2008
Sec. 1.959 Computation of average terrain elevation.
Except as otherwise specified in Sec. 90.309(a)(4) of this chapter, average
terrain elevation must be calculated by computer using elevations from a 30
second point or better topographic data file. The file must be identified.
If a 30 second point data file is used, the elevation data must be processed
for intermediate points using interpolation techniques; otherwise, the
nearest point may be used. In cases of dispute, average terrain elevation
determinations can also be done manually, if the results differ
significantly from the computer derived averages.
(a) Radial average terrain elevation is calculated as the average of the
elevation along a straight line path from 3 to 16 kilometers (2 and 10
miles) extending radially from the antenna site. If a portion of the radial
path extends over foreign territory or water, such portion must not be
included in the computation of average elevation unless the radial path
again passes over United States land between 16 and 134 kilometers (10 and
83 miles) away from the station. At least 50 evenly spaced data points for
each radial should be used in the computation.
(b) Average terrain elevation is the average of the eight radial average
terrain elevations (for the eight cardinal radials).
(c) For locations in Dade and Broward Counties, Florida, the method
prescribed above may be used or average terrain elevation may be assumed to
be 3 meters (10 feet).
[ 70 FR 19306 , Apr. 13, 2005]
Reports To Be Filed With the Commission
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