Glossary
accuracy
The closeness of a measurement to the actual (true) value of the quantity being measured.
aerial imaging rover
A type of
specifically designed for aerial photogrammetry.
aerial photo station
An aerial photo station is created each time an aerial photo is taken during a flight. It defines a point and
includes raw sensor values (orientation and tilt), coordinate data, and an image.
aeronautical information publication
A manual containing thorough details of regulations, procedures and other information pertinent to flying
aircraft in the particular country to which it relates. It is usually issued by or on behalf of the respective civil
aviation administration.
AIP
See
aeronautical information publication
.
airspeed
The speed of the rover relative to the air.
avoidance zone
Avoidance zones are used in the background map to indicate areas that the unmanned aircraft must not fly
over, such as airports and forbidden airspace.
azimuth
Horizontal direction relative to a defined coordinate system.
base station
A base station is an antenna and receiver set up on a known location specifically to collect data to be used
in postprocessing rover files. During a PPK survey, data is collected so that baselines (the position of one
receiver relative to another) can be computed during postprocessing. The base station acts as the position
from which all unknown positions are derived.
block
A single polygonal area that defines the geographical area to be photographed at a defined overlap and
GSD during a flight. A flight may comprise more than one block.
CAA
Civil Aviation Authority.
CORS
Continuously Operating Reference Station. The CORS network is a network of base stations at a known
fixed location. Each base station continuously collects and records GPS observation data. There exist many
CORS networks over the world, some of them denser than others. The reference data from a CORS station
is accessible via the Internet.
cross wind
A wind that blows from a sideways direction.
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