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Proceedings of the Symposium on Progress in Data Processing and Analysis

included in the on-line operation, which would lead to a
•further increase of the computational effort being high
Fig. 4:
Determination of ground coordina
tes from push-broom scanner data
Radiometric preparations include the processing of
calibration test errors, the elimination of disturbing
pixels or disturbing lines, contrast enhancement and the
specific emphasis of thematic aspects for the user.
6. Optimization of processing
A high amount of labour is still necessary for projecting
and the quality control of remote sensing flights.
Particularly labour-intensive is the production of flight
maps with the route to be traced in projecting or the
determination of principal points of forward and side
overlap in quality control. Here, rationalization effects
can be achieved by the use of a satellite-based positioning
and navigation system (included, if possible, in a
continuous information flow).
By means of a project elaborated under computer control, in
which at least the given routes are existing in digital
form as coordinates, the computer aboard the aircraft is
according to this data capable of supplying the necessary
information either to the autopilot or to the navigator.
The computer aboard acquires the position and angle data of
the recorded images and may signal inadequate navigational
accuracy. Thus an immediate reflight for navigational rea
sons is possible and especially the side overlap can be
reduced to a minimum.
The coordinates of the principal points resulting from the
position and angle data can be supplied to the user in a
suitable form (graphic or digital). Thus the production of
the flight maps and the entire quality control of