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The analysis of light-rays penetrating transparent media like air and water constitutes a pertinent problem in climatic research and in the development of algorithms for the retrieval of bio-geo-chemical parameters of suspended matter and dissolved pollutants from remotely sensed ocean colour data. On the basis of the neutron transport code TIMOC a visible and near-infrared photon transport code, called PHO-TRAN, has been developed and tested both against a theoretical benchmark of models and on real data. The photon transport allows for reflection, refraction, absorption and all relevant light-scattering models, in quite general 3-dimensional geometries. In some cases it is also possible to solve the adjoint problem. PHO-TRAN also offers the possibility to sample first order derivatives of almost all responses with respect to certain input parameters. The knowledge of derivatives provides valuable additional information which provides sensitivity profiles and allows for multivariate perturbation estimates, uncertainty analysis and data adjustment. The benchmarking of the developed Monte Carlo procedures is described.

Additional information

Authors: DOYLE J P, University of London, Imperial College of Science Technology and Medicine (GB);RIEF H, JRC Ispra (IT)
Bibliographic Reference: Article: Mathematics and Computers in Simulations
Record Number: 199711323 / Last updated on: 1997-10-16
Original language: en
Available languages: en
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