Spaceborne limb hyperspectral imager for ozone profile detection.

Area of Science:

• Earth and Space Science
• Optical Engineering
• Atmospheric Science

Background:

• Ozone detection is crucial for atmospheric monitoring and climate studies.
• Existing spaceborne remote sensing methods often involve complex scanning mechanisms.
• There is a need for compact, efficient hyperspectral imagers for space applications.

Purpose of the Study:

• To design and develop a novel spaceborne limb hyperspectral imager.
• To achieve wide-band and large dynamic range detection for ozone monitoring.
• To create a compact and lightweight instrument suitable for space remote sensing.

Main Methods:

• The imager integrates an off-axis parabolic telescope and a prism dispersive off-axis aspheric spectrometer.
• A band-attenuation filter is employed for achieving large dynamic range detection.
• The system operates within a spectral range of 280nm to 1000nm with specific field of view and focal length parameters.

Main Results:

• The designed hyperspectral imager meets stringent image quality requirements.
• The instrument is characterized by its small volume and lightweight construction.
• Ground calibration and measurements were successfully performed, including detection of limb hyperspectral radiances on the Tiangong-2 spacecraft.

Conclusions:

• The developed spaceborne limb hyperspectral imager is a viable and advanced solution for ozone detection.
• Its compact design and performance characteristics make it superior to existing methods for space remote sensing.
• The successful deployment and data acquisition demonstrate its practical applicability in atmospheric research.