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USGS Aerial Camera Specifications
USGS Aerial Camera Specifications
Nominal focal length (mm)
|
|
88 |
153 |
210 |
305 |
| Deviation of calibrated focal length from nominal (mm) |
|
± 4 |
± 3 |
± 4 |
± 5 |
| Minimum angular field of view (°) |
|
120 |
90 |
70 |
50 |
| Maximum useable field angle (°) Optical axis out to |
|
54.5 |
40 |
30 |
22.7 |
| Maximum lens distortion at maximum aperture (µm) Symmetric radial |
|
± 15 |
± 10 |
± 20 |
± 20 |
| Tangential component of decentering (µm) |
|
– |
8 |
– |
– |
| Maximum deviation of calibrated principal point/point of symmetry from principal point of autocollimation (µm) |
|
30 |
15 |
30 |
30 |
| Stereomodel flatness deviation (µm) |
|
±17 |
± 19 |
– |
– |
| Minimum lens resolving power ([cycles or lp]/mm) |
|
– |
– |
– |
– |
Angle
|
|
|
|
|
|
| 0° |
|
59 |
80 |
49 |
48 |
| 7.5° |
|
59 |
80 |
49 |
48 |
| 15° |
|
49 |
67 |
42 |
28 |
| 22.7° |
|
42 |
57 |
35 |
24 |
| 30° |
|
35 |
57 |
29 |
– |
| 35° |
|
30 |
48 |
– |
– |
| 40° |
|
17 |
40 |
– |
– |
| 45° |
|
14 |
– |
– |
– |
| 50° |
|
12 |
– |
– |
– |
| 54.5° |
|
12 |
– |
– |
– |
For all cameras:
- Filter wedge angle <=10 seconds of arc
- Film magazine platen +/- 13 µm from true plane
- Film magazine platen id required
- Fiducial lines of intersection: Lines connecting either opposite side or opposite corner fiducials.
- The intersection points are defined as the indicated principal points (IPPs). (See diagram)
- Fiducial angles of intersection: 90° +/- 1 minute
- Maximum deviation of IPPs from principal point of autocollimation is 30 µm.
- Eight fiducial marks required – no glass marks.
