TY - JOUR
T1 - Incorporation of atmospheric blurring effects in target acquisition modeling
AU - Sadot, D.
AU - Kopeika, N. S.
AU - Rotman, S. R.
N1 - Publisher Copyright:
© 1994 SPIE. All rights reserved.
PY - 1994/7/8
Y1 - 1994/7/8
N2 - Recent investigation of atmospheric modulation transfer function (MTF) in the thermal range has shown significant spatial frequency dependence. This dependence is related to aerosol forward scatter as well as absorption effects, shown to be primary contributors to the blur in thermal imaging through the atmosphere. In this paper, the night vision laboratory (CNVEO) target acqusition search model is revised to include atmospheric MTF spatial frequency dependence. It is shown how the target acquisition probabilities and, conversly, the range at which targets can be detected are changed by the inclusion of atmospheric effects. Under weak turbulence conditions target acquisition probabilities are better than predicted by the CNVEO model at shorter ranges. For very strong turbulence, as at midday on hot days, target acquisition probabilities decrease. The improvement possible by correcting for this blur automatically in real time is significant.
AB - Recent investigation of atmospheric modulation transfer function (MTF) in the thermal range has shown significant spatial frequency dependence. This dependence is related to aerosol forward scatter as well as absorption effects, shown to be primary contributors to the blur in thermal imaging through the atmosphere. In this paper, the night vision laboratory (CNVEO) target acqusition search model is revised to include atmospheric MTF spatial frequency dependence. It is shown how the target acquisition probabilities and, conversly, the range at which targets can be detected are changed by the inclusion of atmospheric effects. Under weak turbulence conditions target acquisition probabilities are better than predicted by the CNVEO model at shorter ranges. For very strong turbulence, as at midday on hot days, target acquisition probabilities decrease. The improvement possible by correcting for this blur automatically in real time is significant.
UR - http://www.scopus.com/inward/record.url?scp=77958082594&partnerID=8YFLogxK
U2 - 10.1117/12.180064
DO - 10.1117/12.180064
M3 - Conference article
AN - SCOPUS:77958082594
VL - 2224
SP - 95
EP - 107
JO - Proceedings of SPIE - The International Society for Optical Engineering
JF - Proceedings of SPIE - The International Society for Optical Engineering
SN - 0277-786X
T2 - Infrared Imaging Systems: Design, Analysis, Modeling, and Testing V 1994
Y2 - 4 April 1994 through 8 April 1994
ER -