Measurement Principle
A Fabry-Perot interferometer produces a circular fringe pattern on its focal plane. A part of this circular fringe (a circular arc oriented along the spin axis direction of the spacecraft) is used as a 1D image. Each 2ms, the instantaneous field of view shifts by 0.18º along the spin-scan direction. Hence, using a one degree-of freedom scanning mirror (15 mm x 25 mm) to alter the line-of-sight from 25º to 55º, plus the spin of the spacecraft, it can obtain full-disk images of the planet and the sodium tail. The radiation-tolerant CMOS device with an image intensifier is used as a photon detector.
Members
- Principal Investigator
- Ichiro Yoshikawa (The University of Tokyo, Japan)
- Co-PI
- Oleg Korablev (IKI, Russia)