bbr

Contents: Description, Arguments, Usage, Examples, Related Functions Supported Under Version: >1.69 Current Davinci Version: 2.27 64-bit Safe: Yes Description The bbr() function computes the blackbody curve corresponding to the specified temperature, for the given wavenumber(s), in units of W cm^-2 sr^-1 /cm^-1 Arguments and Return Values Arguments: an array of wavenumbers and an equally sized array of temperatures. Return Value: an array of the same size as the inputs containing blackbody spectral radiance (per unit wavenumber, in units of W/cm^2/sr/cm^-1). Usage Syntax: bbr(wavenumber, temperature) The bbr() function is a binary operator function (see bop). Wavenumbers are assumed to be in units of reciprocal centimeters (denoted /cm or cm^-1). Temperature is in Kelvin The bbr() function returns double values giving spectral radiance per unit wavenumber, in units of watts per centimeter squared per steradian per reciprocal centimeter (equivalent to W/cm/sr, but stating units that way obscures the wavenumber). These values differ from spectral radiance per unit frequency by a factor of c (the speed of light). To get spectral radiance per unit wavelength, use bbrw. Examples dv> wavenumbers 1x10x1 array of double, bsq format [80 bytes] 1477.84 1477.84 1267.62 1174.85 1075.09 983.691 909.883 850.846 796.481 675.314 dv> temps 1x10x1 array of float, bsq format [40 bytes] 304.000 305.000 306.000 299.000 292.000 287.000 284.000 281.000 275.000 271.000 dv> bb = bbr(wavenumbers, temps) 1x10x1 array of double, bsq format [80 bytes] 3.52798e-06 3.60989e-06 6.27280e-06 6.79388e-06 7.44347e-06 8.23943e-06 9.02083e-06 9.52819e-06 9.47131e-06 1.04592e-05

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