Twilight and Daytime Colors of the Clear Sky

Lee, Jr, Raymond L.

Twilight and Daytime Colors of the Clear Sky

Active / Technical Report | Accession Number: ADA530648 |

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Abstract:

Digital image analysis of the cloudless skys daytime and twilight chromaticities challenges some existing ideas about sky colors. First, although the observed colors of the clear daytime sky do lie near the blackbody locus, their meridional chromaticity curves may resemble it very little. Second, analyses of twilight colors show that their meridional chromaticity curves vary greatly, with some surprising consequences for their calorimetric gamuts.

Author(s):

Lee, Jr, Raymond L.

Author Organization(s):

NAVAL ACADEMY ANNAPOLIS MD

Descriptive Note:

Journal article

Supplementary Note:

Published in Applied Optics, v33 n21 p4629-4638, 20 Jul 1994.

Pagination:

0011

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:

Approved For Public Release

Distribution Statement:

Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR

Identifying Numbers

Monitor Series:

USNA

Subject Terms

Joint Capability Areas:

JCA_6.3.3_Spectrum Management; JCA_6_Net Centric; JCA_1.2_Force Preparation; JCA_1_Force Support; JCA_6.3_Net Management; JCA_1.2.3_Educating; JCA_5_Command and Control; JCA_5.3_Planning; JCA_8_Building Partnerships; JCA_1.2.5_Lessons Learned; JCA_6.4.1_Secure Information Exchange

Communities of Interest:

Air Platforms

Descriptor(s):

*TWILIGHT, *CHROMATICITY, *SKY, *DAYLIGHT, *COLORS, SPECTRORADIOMETERS, COLORIMETRY, LUMINANCE, AEROSOLS, OPTICS, REPRINTS, IMAGE PROCESSING, BLUE(COLOR)

Field(s)/Group(s):

Atmospheric Physics, Optics

Keyword(s):

ATMOSPHERIC OPTICS, CLEAR SKY CHROMATICITIES, BLUE SKY, TWILIGHT COLORS, DIGITAL IMAGE ANALYSIS, BLACKBODY LOCUS, MERIDIONAL CHROMATICITY

Report Date:

1994 Jul 20

Creation Date:

2010 Oct 27