Flight Planning & AP Calculation
Flight Planning & AP Calculation
Flight Planning & AP Calculation
PARAMETERS NEEDED
1. FOCAL LENGHT OF CAMERA TO BE USED
2. CAMERA FORMAT SIZE
3. PHOTO SCALE DESIRED
4. SIZE OF THE AREA TO BE
PHOTOGRAPHED
5. AVERAGE ELEVATION OF THE AREA
6. OVERLAP DESIRED
7. SIDE LAP DESIRED
8. GROUND SPEED OF THE AIRCRAFT
MISSION PLANNER
1. FLYING HEIGHT ABOVE DATUM FROM
WHICH THE PHOTOS ARE TO BE TAKEN
2. LOCATION,DIRECTION & NUMBER OF
FLIGHT LINES TO BE MADE OVER THE
AREA TO BE PHOTOGRAPHED
3. TIME INTERVAL BETWEEN EXPOSURES
4. NUMBER OF EXPOSURES ON EACH
FLIGHT LINE
5. TOTAL NUMBER OF EXPOSURES
NECESSARY FOR THE MISSION
EXAMPLE
• A STUDY AREA IS 10KM WIDE IN THE
EAST-WEST DIRECTION &
• 16KM LONG THE NORTH-SOUTH
DIRECTION.
• A CAMERA HAVING A 152.4 mm
FOCAL LENGTH LENS &
• 230mm FORMAT IS TO BE USED.
• THE DESIRED PHOTO SCALE IS
1:25000
EXAMPLE (CONTINUE)..
5750 m on a side
Determine Ground Separation
between Photos on a Line for
40% percent Advance per
Photo (i.e. 60% Endlap)
Say 51 Second
Because the Intervalometer can
only be set in Even seconds, the
number is rounded off. Considering
60% coverage recalculate the
Distance between Photo Centers,
using reverse of the earlier equation
• 51 sec/ photo * 160 km/hr * 1000m/km
3600 sec/hr
= 2267 m
Compute the number of Photos per
16 km line dividing this length by the
Photo advance. Add one Photo to
each end round the number up to
ensure coverage
• 3333 m * 1 = 53.3 mm
62500