Scientific objectives
Observational aim: Fabry-Perot interferometry for sensing Doppler winds and temperatures from thermospheric airglow/aurora is a well-established technique. Wavelength shifts and spectral broadening of airglow emissions impart changes to the ring pattern produced by the Fabry-Perot interferometer as recorded with a focal plane sensor. The image of the rings produced by the airglow emissions is compared to a calibration image, produced by diffuse 632.8 nm light from a local source, so that the shifts and broadening can be quantified relative to a known stable reference to determine velocities and temperatures. Narrow band filters, in a filter wheel, precede the etalon to isolate the desired spectral feature to be measured.

Owner: Polar Research Institute of China (PRIC)
Contacts
PI: Dr. Zejun Hu
Address: Polar Research Institute of China, No. 451, Jinqiao Road, Shanghai, 200136, China
E-mail: huzejun@pric.org.cn

Instrument specifications
Manufacturer: Keo Scientific Ltd.
Name: Fabry-Perot Interferometer
Fixed-Gap Etalon: 100 mm
Optical detector: Andor iXon Ultra 888
EMCCD 1024x1024 pixels
Filterwheel: 6 position filter wheel w/heating
Filters: 557.7 nm and 630.0 nm