Session
Session 6: Science Mission Payloads 1
Abstract
We have developed an engineering model of a novel compact hyperspectral imager. The CHIEM instrument is designed to be compatible with a 12U CubeSat satellite, offering a swath of 100km and a GSD of 25m from 600km altitude. The hyperspectral sensor has thin film interference filters directly deposited on a 12Mpixel CMOS 2D detector array. The spectral range covers 470 to 900 nm, with narrow spectral resolution (FWHM) between 5 and 10nm. Besides the hyperspectral zone which covers 2/3 of the detector array, it also contains 2 panchromatic zones without filters. While the baseline design uses a conventional front-side illuminated CMOS sensor, the development also includes filter depositions on a back-side illumination (BSI) version with a higher sensitivity. For the optical design of the front telescope, CHIEM uses a very compact three mirror anastigmat, which allows a wide field of view in both across track and along track direction (> 9.5o x 7.2o). The readout electronics (ROE) provides all required sensor interfaces (power, control, data) enabling its full performance operation, and also a set of backend interfaces for system power, remote control, and backend remote data (to EGSE) and local storage interfaces.
Presentation
CHIEM: A New Compact Camera for Hyperspectral Imaging
We have developed an engineering model of a novel compact hyperspectral imager. The CHIEM instrument is designed to be compatible with a 12U CubeSat satellite, offering a swath of 100km and a GSD of 25m from 600km altitude. The hyperspectral sensor has thin film interference filters directly deposited on a 12Mpixel CMOS 2D detector array. The spectral range covers 470 to 900 nm, with narrow spectral resolution (FWHM) between 5 and 10nm. Besides the hyperspectral zone which covers 2/3 of the detector array, it also contains 2 panchromatic zones without filters. While the baseline design uses a conventional front-side illuminated CMOS sensor, the development also includes filter depositions on a back-side illumination (BSI) version with a higher sensitivity. For the optical design of the front telescope, CHIEM uses a very compact three mirror anastigmat, which allows a wide field of view in both across track and along track direction (> 9.5o x 7.2o). The readout electronics (ROE) provides all required sensor interfaces (power, control, data) enabling its full performance operation, and also a set of backend interfaces for system power, remote control, and backend remote data (to EGSE) and local storage interfaces.
