The following horizon information was compiled by Bob Bowie for the
CP4 site in WISP94, near South Roggen, CO.  Information was obtained
using a theodolite.  The theodolite was placed on the extreme
southeast end of the CP4 antenna pedestal van, and leveled.  Note that
all direction readings are in azimuth from magnetic north; all
elevation angles are positive (above the horizon), unless otherwise
noted.

In general, the CP4 site had an unobstructed field of view, with the
radar sitting in a depresion (or "bowl") with the visual horizon at a
range of about 15-20 km (exception: mountains to the west).  See
clutter images for more graphic detail.  For photos of the horizon,
see associated gif images.

Magnetic Az.	Horizon		Notes:
(degrees)	(degrees)
------------	---------	---------------------------------------
  0		0.0		Trees at 0 elev, ground at -.5
  5		0.0		Trees at 0 elev, ground at -.2
  5.5		0.0		Oil well tank
 10		0.0
 15		0.0
 20		 .2
 25		 .4
 30		 .2
 35		 .4
 40		 .5
 45		 .5
 50		 .6		House
 55		 .6		Trees and House
 60		 .6		Trees
 65		 .6		Trees
 70		 .5		Ground
 72		1.1		Oil well tank
 75		 .5
 80		 .5		South Roggen
 80.75		 .7		Church steeple
 85		 .5
 90		 .4
 95		 .5
100		 .5
105		 .5
108.4		2.0		Phone tower
110		 .7		Grain silo
115		 .5		.5
120		 .6
125		 .7
130		 .6
135		 .5
140		 .5
145		 .4
150		 .4
155		 .4
160		 .3
165		 .3
170		 .3
175		 .3
180		 .3
185		 .3
190		 .4
195		 .3
200		 .3
205		 .3
210		 .3
215		 .3
220		 .3
220.5		 .4		House
225		 .3
230		 .4
235		 .4
240		 .4
245		 .4
250		 .4
255		 .4
260		 .4
265		 .4
270		 .4
275		 .4
280		 .4
285		 .3
290		 .3
295		 .9		Oil well tank
300		 .2
305		 .3
310		 .3
315		 .3
320		 .3
325		 .2
330		---		Blocked by antenna pedestal
335		---		Blocked by antenna pedestal
337		 .2
340		 .2
345		 .1
350		0.0
355		0.0