OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 34, Iss. 15 — May. 20, 1995
  • pp: 2750–2754

Instrument self-shading in underwater optical measurements: experimental data

G. Zibordi and G. M. Ferrari  »View Author Affiliations


Applied Optics, Vol. 34, Issue 15, pp. 2750-2754 (1995)
http://dx.doi.org/10.1364/AO.34.002750


View Full Text Article

Enhanced HTML    Acrobat PDF (154 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

Self-shading error of in-water optical measurements has been experimentally estimated for upwelling radiance and irradiance measurements taken just below the water surface. Radiance and irradiance data have been collected with fiber optics that terminated with 1°, 18°, and 2π optics housed in the center of a disk that simulated the size of the instrument. Analysis of measurements taken at 500, 600, and 640 nm in lake waters have shown errors ranging from a few percent up to several tens of percent as a function of the size of the radiometer, the absorption coefficient of the medium, the Sun zenith, and the atmospheric turbidity. Comparisons between experimental and theoretical errors, the latter computed according to a scheme suggested by other authors, have shown absolute differences generally lower than 5% for radiances and lower than 3% for irradiances. Analysis of radiance measurements taken with 1° and 18° fields of view have not shown appreciable differences in the self-shading error. This finding suggests that correction schemes for self-shading error developed for narrow-field-of-view radiance measurements could also be applied to measurements taken with relatively larger fields of view.

© 1995 Optical Society of America

History
Original Manuscript: September 15, 1994
Revised Manuscript: November 18, 1994
Published: May 20, 1995

Citation
G. Zibordi and G. M. Ferrari, "Instrument self-shading in underwater optical measurements: experimental data," Appl. Opt. 34, 2750-2754 (1995)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-34-15-2750


Sort:  Author  |  Year  |  Journal  |  Reset  

References

  1. H. R. Gordon, K. Ding, “Self-shading of in-water optical instruments,” Limnol. Oceanogr. 37, 491–500 (1992). [CrossRef]
  2. R. C. Smith, K. S. Baker, “Optical properties of the clearest natural waters,” Appl. Opt. 20, 177–184 (1981). [CrossRef] [PubMed]
  3. S. Tassan, G. M. Ferrari, “An alternative approach to absorption measurements of aquatic particles retained on filters,” Limnol. Oceanogr. (to be published).
  4. G. M. Ferrari, S. Tassan, “On the accuracy of determining light absorption by ‘yellow substance’ through measurements of induced fluorescence,” Limnol. Oceanogr. 36, 777–786 (1991). [CrossRef]
  5. D. Tanré, C. Deroo, P. Duhaut, M. Herman, J. J. Morcrette, J. Perbos, P. Y. Deschamps, “Description of a computer code to simulate the satellite signal in the solar spectrum: the 5S code,” Int. J. Remote Sensing 11, 659–668 (1990). [CrossRef]
  6. A. Angstrom, “Techniques of determining the turbidity of the atmosphere,” Tellus 13, 214–223 (1961). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

Figures

Fig. 1 Fig. 2 Fig. 3
 

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited