The Chinese Hα Solar Explorer (CHASE) mission: An overview

Abstract

The Chinese Hα Solar Explorer (CHASE), dubbed "Xihe" - Goddess of the Sun, was launched on October 14, 2021 as the first solar space mission of China National Space Administration (CNSA). The CHASE mission is designed to test a newly developed satellite platform and to acquire the spectroscopic 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 Å and from 6567.8 to 6570.6 Å with 0.024 Å pixel spectral resolution and 1 minute temporal resolution. The continuum imaging mode obtains photospheric images in continuum around 6689 Å with the full width at half maximum of 13.4 Å. The CHASE mission will advance our understanding of the dynamics of solar activity in the photosphere and chromosphere. In this paper, we present an overview of the CHASE mission including the scientific objectives, HIS instrument overview, data calibration flow, and first results of on-orbit observations.

9 pages, 6 figures

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• The Solar Orbiter mission -- Science overview
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Cited by in corpus (21)

• Calibration procedures for the CHASE/HIS science data
• The Solar Upper Transition Region Imager (SUTRI) onboard the SATech-01 satellite
• Sunrise III: Overview of Observatory and Instruments
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• First detection of transverse vertical oscillation during the expansion of coronal loops
• Spectral Observations and Modeling of a Solar White-light Flare Observed by CHASE
• Solar Ring Mission: Building a Panorama of the Sun and Inner-heliosphere
• Why "solar tsunamis" rarely leave their imprints in the chromosphere
• Three-dimensional velocity fields of the solar filament eruptions detected by CHASE
• Statistical analysis of the Si I 6560.58 Å line observed by CHASE
• Enhanced Non-Thermal Line Broadening inside Coronal Cavities above Solar Prominences revealed by Spectral Imaging CoronaGraph
• High-resolution Observations of a C9.3 White-light Flare and Its Impact on the Solar Photosphere
• Three-stage Acceleration of Solar Energetic Particles Detected by Parker Solar Probe
• Transverse vertical oscillations during the contraction and expansion of coronal loops
• Radial dependence of ion fluences in the 2023 July 17 SEP event from Parker Solar Probe to STEREO and ACE
• The Kinematical Behavior of Solar Eruptive Filaments Affected by the Poloidal Magnetic Field
• The Observations of Magnetic Reconnection During the Interaction Process of Two Active Region Filaments
• Solar flare ribbons structured by uncombed chromospheric loops
• High-spectral Resolution, Multi-wavelength Center-to-limb Observations of the Sun
• An Atlas of Spectroheliograms from 3641 to 6600 Å
• Active region upflows in various coronal structures and their coupling to the lower atmosphere