[Information extraction of the Chang'E-1 interference imaging spectrometer (IIM) 2C data]

Area of Science:

• Remote Sensing
• Planetary Science
• Image Processing

Context:

• Chang'E-1 lunar mission provided Interferometric Imaging data (IIM).
• Radiometric calibration is crucial for accurate lunar surface analysis.
• Initial data exhibited noise, bad pixels, and response inconsistencies.

Purpose:

• To perform rigorous radiometric calibration of Chang'E-1 IIM data.
• To correct image artifacts including bad pixels, bands, and transverse response discontinuity.
• To establish a robust data processing pipeline for lunar surface reflectivity mapping.

Summary:

• High-angle solar azimuth data were used for radiometric calibration.
• Neighbourhood averaging and subspace maximum eigenvalue methods addressed data noise and discontinuities.
• Empirical linear and wavelet transform methods were employed for absolute calibration and bias correction, yielding IIM 2C data.

Impact:

• Successfully generated the first reflectivity map of the lunar nearside using calibrated IIM 2C data.
• Established a validated analysis proposal for Chang'E-1 IIM 2C data.
• Improved the quality and reliability of lunar remote sensing data for scientific research.