SHADE COEFFICIENT CALCULATION DEVICE, SOLAR RADIATION FORECAST DEVICE, PROGRAM AND SHADE COEFFICIENT CALCULATION METHOD

摘要

PROBLEM TO BE SOLVED: To improve accuracy in calculating solar radiation and determining whether or not an observation object can be viewed from a target point.;SOLUTION: A shade coefficient calculation device includes: a humidity information acquisition unit for acquiring plural humidities corresponding to plural altitudes, respectively, at an observation point; a shade rate retention unit for retaining a shade rate indicating a rate of light blocked by atmosphere having one humidity at one altitude in association with each of plural combinations of plural altitude ranges and plural humidity ranges; and a shade coefficient calculation unit for using the shade rate retained by the shade rate retention unit to calculate a shade coefficient indicating a rate of light blocked by atmosphere at a target point. The shade rate retention unit retains one shade rate in association with a combination of one humidity range and one altitude range, and retains another shade rate lower than the one shade rate in association with a combination of the one humidity range and another altitude range higher than the one altitude range.;COPYRIGHT: (C)2014,JPO&INPIT