- Conference date: 23-25 Apr 1995
- Location: College Park, Maryland (USA)
The Diffuse Infrared Background Experiment (DIRBE) on board NASA’s Cosmic Background Explorer (COBE)1 satellite has surveyed the entire sky in ten photometric bands covering the wavelength range from 1 to 240 μm at an angular resolution of 0.7°. The spin of the spacecraft, in combination with its orbital motion, allowed the DIRBE instrument to sample redundantly each celestial direction from multiple orientations within the interplanetary dust cloud. The variation in viewing aspect gives rise to time‐dependent changes in the observed intensity which are only associated with the changing brightness contributions from the interplanetary dust. We present a three‐dimensional, semiphysical model for the emission and scattering of interplanetary dust and describe the techniques employed to optimize the model to match the temporal variations of the infrared sky brightness as observed by DIRBE along selected lines of sight. We then show the accuracy with which the optimized model is able to reproduce the apparent temporal and angular variation of sky brightness associated with the interplanetary dust over the entire sky.
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