ANALYSIS OF SMALL PHOTOGRAPHIC IMAGES OF LINE TARGETS
DEFENSE RESEARCH CORP SANTA BARBARA CA
Pagination or Media Count:
Using a particular model of the photographic point spread function derived previously, the images which would be expected from a reentry body plus a luminous wake and from a point target moved uniformly during exposure are calculated and compared. The former images exhibit a pronounced head and faint tail which do not appear in the latter. Two calibration procedures for images of the latter type may be considered, based on the use of either the image growth law for line calibration images or the image growth law for point calibration images. The accuracy of either method depends on the point spread function of the camera. In general the first procedure is accurate for long images but may have a 50 error for images having small length-to-width ratios. The second may have a 30 error for long images but is accurate for short images it is felt that this procedure will be more satisfactory in practice.
- Fluid Mechanics
- Unmanned Spacecraft