The Chinese Hα Solar Explorer (CHASE) is designed to test a newly developed satellite platform and conduct solar observations. The scientific payload of the satellite is an Hα imaging spectrograph (HIS), which can, for the first time, acquire full-disk spectroscopic solar observations in the Hα waveband. The CHASE mission was jointly proposed by Nanjing University and Shanghai Academy of Spaceflight Technology. CHASE was officially approved by China National Space Administration (CNSA) in 2019 and scheduled to launch in 2021.
CHASE/HIS has two solar observation modes: full-disk raster scanning mode and full-disk continuum imaging mode. The raster scanning mode consists of two spectral lines: Hα (6562.8 ± 2.5A°) and Fe I (6569.2 ± 0.8A°). The raster scanning mode can obtain full-disk spectroscopic data in less than 60 s, or local-area spectroscopic data in 30 – 60 s. The continuum imaging mode is available at the waveband 6535 – 6545A°. Brief descriptions of the technical parameters for the two modes are provided in Tables 1 and 2, respectively.
Copyright © NanJing University Solar Physics Group