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CHASE (Xihe)


CHASE (Chinese Hα Solar Explorer), nicknamed Xihe, 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 Hα Imaging Spectrograph (HIS) is the scientific payload of the CHASE satellite. It consists of two observational modes: raster scanning mode and continuum imaging mode. The raster scanning mode obtains full-Sun or region-of-interest spectral images from 6559.7 to 6565.9 ; and from 6567.8 to 6570.6 with 0.024 pixel spectral resolution and 1 min temporal resolution. The continuum imaging mode obtains photospheric images in continuum around 6689 with the full width at half maximum of 13.4 . The CHASE mission will advance our understanding of the dynamics of solar activity in the photosphere and chromosphere.

It will complement the observations by on-orbit solar spacecraft (such as SDO, IRIS, STEREO, PSP and Solar Orbiter), as well as future solar missions of the Advanced Space-based Solar Observatory (ASO-S).

Nation: China
Type / Application: Astronomy, solar
Equipment: HIS
Power: 2 deployable solar arrays, batteries
Lifetime: 4 years
Mass: ~500 kg
Orbit: 517 km SSO
Satellite COSPAR Date LS Launch Vehicle Remarks
CHASE (Xihe) 2021-091A ? 14.10.2021 TY LC-9 CZ-2D (2) with QX 1, Tianshu 1, JTSY, HEAD 2E, HEAD 2F, Guidao Daqi Midu TSW, SSS 1, SSS 2A, Tianyuan 1, Jinzijing 2


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