-9-
( 3c).. determination of the first derivatives of these six
elements (i.e. airplane's speeds ax/dt, aY/at; rate
of climb or descent az/àt; rotational changes in
attitude doe /àt, ag /at; and heading and drift
changes dy/dt),and continuously recording these
changes digitally.
In case of aerial data scanning, this record is needed
not only to "position" the data which are scanning-
recorded, but also to "rectify" these data into an
earth coordinate system.
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ELEMENTS OF
OUTER ORIENTATION
and DER\VATIVES (sPEGDS )
IN FLIGHT
Figure 5