Spectral camera control device and method for controlling spectral camera

A method for executing a spectral camera control program, being installed, along with a spectral camera provided with a liquid crystal tunable filter, in an aircraft capable of stationary flight, comprising:

• step of causing a computer to function as a spectral camera control device which causes the spectral camera to capture an image in a snapshot mode each time a transmission wavelength of the liquid crystal tunable filter is switched while the aircraft is in stationary flight,
• step of causing a computer to function as a special camera control device which sets an exposure time of the spectral camera to a shorter time than a current exposure time when either one of an amount of attitude change and an amount of position change of the spectral camera per exposure time in the spectral camera exceeds a predetermined threshold based on a spatial resolution of the spectral camera, and
• step of causing a computer to function as a spectral camera control device which acquires an angular velocity of the spectral camera from an attitude sensor to calculate the exposure time by Formula (1) shown below:
• T<X/(H×Ω) Formula (1)
• where each symbol represents the following:
• T:
• Exposure time (sec),
• X:
• Spatial resolution (m),
• H:
• Height of aircraft (m), and
• Ω:
• Angular velocity of spectral camera (rad/sec).