-3-
**•*»
a recorded verticality of thirty arc seconds, the co
ordinates of prominent features on the face of the earth
can be established within a probable error of 15 feet.
This mission substantially reduces the need for ground
survey parties to provide ground control to support
Aerial Mapping Photography.
5. Terrain Profile Recording - This is the measuring of
the terrain profile along the flight track of the aircraft
The terrain data provides vertical control for the map
ping photography. This function is normally accom
plished in conjunction with electronically positioned
Aerial Mapping Photography, Horizontal Control
Photography and Precise Aerial Mapping Photography.
6. Long Line Geodetic Azimuth Determination - In
certain areas of the world, the positioning of a long
narrow chain of islands is not well suited to trilatér
ation surveying; that is, by measurement of distance
alone. In such localities, the measurement of angular
information in addition to distance is a necessity.
In order to provide the capability of accomplishing the basic
functions above, several new and advanced techniques and components
had to be developed. Figure 1 illustrates the approximate layout of
the overall Q-28 system. From the front of the aircraft rearward,
the equipments and their specifications are discussed in detail. Some
of the missions are reviewed as they affect the individual equipments.
Figure 2 illustrates the navigator's station. This station con
tains the standard aircraft instruments plus a special AN/USQ-28
navigation control panel. This panel was designed to increase the
power, speed and accuracy with which the navigator can perform his
vital functions. The navigator can perform executive, decision
making functions without the distraction of routine work. By utilizing
the Q-28 control panel, he can: