Nikon D90 - Digital Camera SLR Betriebshandbuch - Seite 14

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2.1 Identify Customer Requirements

The flight crew needs the following information to assure successful acquisition of the

aerial photographs required by the customer:

Type of mission. The major types are:

 Spot Photography

 Route Photography

 Photographic Mapping

Location

 Target location(s) for spot photography

 Beginning and end of a route (highway, shoreline, river)

o Percent of successive photo overlap

 Corner point coordinates defining area for photographic mapping

o Amounts of successive photo overlap and parallel photo overlap

Ground level coverage of each photograph (how many feet wide and how many feet deep)

Camera pointing angle (how many degrees down from the horizontal)

Resolution at ground level at the center of the photograph

2.2 Translate customer requirements into specific photographic shooting parameters to

include:

 Altitude above ground (AGL)

 Aircraft speed

 Camera pointing angle

 Lens focal length

 Time between photographs (required for route photography and photographic mapping)

Altitude above ground level (AGL)

1200 feet AGL is an ideal altitude for aerial photography; the closer to the ground, the

less build-up of haze and thus a clearer photograph. Higher altitudes allow for more

ground coverage per picture but at lower ground resolution.

Aircraft Speed

At 90 Knots, the aircraft moves 150 feet per second. This is a good speed for aerial

photography.

2.0 Pre-Mission Planning