Computer Science – Numerical Analysis
Scientific paper
Sep 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988itp..work..215y&link_type=abstract
In NASA, Ames Research Center, Second Workshop on Improvements to Photometry p 215-245 (SEE N89-13310 04-89)
Computer Science
Numerical Analysis
10
Absorption Spectra, Broadband, Earth Atmosphere, Estimates, Irradiance, Photometry, Simulation, Stars, Air, Errors
Scientific paper
Atmospheric extinction in wideband photometry is examined both analytically and through numerical simulations. If the derivatives that appear in the Stromgren-King theory are estimated carefully, it appears that wideband measurements can be transformed to outside the atmosphere with errors no greater than a millimagnitude. A numerical analysis approach is used to estimate derivatives of both the stellar and atmospheric extinction spectra, avoiding previous assumptions that the extinction follows a power law. However, it is essential to satify the requirements of the sampling theorem to keep aliasing errors small. Typically, this means that band separations cannot exceed half of the full width at half-peak response. Further work is needed to examine higher order effects, which may well be significant.
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