研究目的
To present new formaldehyde (H2CO) retrievals from the OMPS nadir instrument on the Suomi NPP satellite and compare them with OMI products to assess consistency and quality.
研究成果
The study demonstrates the suitability of OMPS for H2CO retrievals, with improved signal-to-noise ratio reducing noise compared to OMI. However, the larger spatial pixels of OMPS limit feature discernibility. The overlap period between OMI and OMPS offers a valuable opportunity for cross-calibration and building a consistent long-term data set.
研究不足
The reduced spectral resolution of OMPS compared to OMI and the larger spatial pixel size of OMPS limit the ability to distinguish particular features of H2CO. The detection limit is estimated at about 7.5 × 10^15 molecules cm^-2, making it difficult to resolve background concentrations.
1：Experimental Design and Method Selection:
The algorithm involves direct spectral fitting of measured radiance to obtain slant column densities (SCDs) and conversion to vertical column densities (VCDs) using precomputed scattering weights for air mass factors (AMFs).
2：Sample Selection and Data Sources:
Data from the OMPS nadir instrument on the Suomi NPP satellite, focusing on spectra recorded between 30° S and 30° N.
3：List of Experimental Equipment and Materials:
OMPS-NM sensor, which measures UV radiation covering 300 to 380 nm with a pixel sampling of 0.42 nm.
4：42 nm.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: Wavelength calibration of radiance, construction of a mean radiance reference over the remote Pacific Ocean, and application of a reference sector normalization.
5：Data Analysis Methods:
Nonlinear least-squares inversion method to minimize the cost function defined as the weighted square difference between measured and modeled radiance.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
