TM 11-5840-281-12-1
4-5.
SITE AND SHELTER REQUIREMENTS. (CONT)
EQUIPMENT SITING PROCEDURES
Two equipment siting procedures are given below. The first procedure requires less time but does not Include a check
for excessive negative ground angle. It is used when a map and theodolite or transit are not available, or when time will
not permit use of the second method. The second procedure uses a map and theodolite or transit; it Is more precise and
eliminates the possibility of relocating radar set group due to excessive negative ground angle. In the following
procedures, radar site refers to the specific location of radar set group and operating site refers to the specific location of
control-Indicator groups.
Siting Without Theodolite or Transit
The following siting procedure accomplishes the same objective as the procedure using a map and theodolite or transit,
with two exceptions: it does not include a check for excessive negative ground angle, and it does not include a precise
radar coverage check for inadequate radar coverage due to obstructions. When this procedure is used, radar coverage
and excessive negative ground angle checks are made after radar set is installed. These checks are made using siting
scope and clinometer, which mount on azimuth and elevation antennas, and are supplied as part of radar set
group.
1.
Select a runway configuration from Runway Siting Configurations (para 4-5) that best represents the
configuration of airfield. Relate location of radar site on illustration to its location on airfield.
2.
Proceed to appropriate location of radar site on airfield; check that all requirements for Terrain (para 4-5),
Accessibility (para 4-5), and Equipment Component Locations (para 4-5) are satisfied.
NOTE
If all requirements are satisfied, proceed with step 3; if not, visually survey surrounding area
for another location that will satisfy above requirements;3. Visually determine through 360
degrees in azimuth that no apparent radar target obstructions exist that will prevent
adequate radar coverage. Give special consideration to approach zones to runways.
NOTE
If there are no apparent obstructions visible, proceed with step 4. If an obstruction Is
observed, relocate radar site to an area where no apparent obstructions are visible and
repeat procedure, starting with step 2.
4.
Measure distances from center of radar set to clr and from center of radar set to a point on rpl directly
opposite td point to ensure radar site selected is within perimeters established in Equipment Siting Limits
NOTE
If radar site is within equipment siting limits, proceed with step 5; if not, select new radar site
that is within siting limits and repeat procedure beginning with step 2.
5.
Mark radar site for equipment installation.
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