Abstract
The OMPS Limb sensor flying on the Suomi-NPP mission measures vertically-resolved Earth limb spectral radiance profiles to derive a high vertical resolution ozone profile using both UV and visible light dispersed by a prism and imaged onto a single CCD. The measurement challenges include a wide dynamic range in both spectral and spatial directions and demanding stray light requirements, especially for the UV wavelengths. The proposed operational change from Suomi NPP to JPSS2 eliminates a multiple image approach and reduces stray light levels through use of different images for different wavelength channels. Through use of a stepped integration time scheme and on-board image consolidation, the spectral radiance measurements are improved and more pixels are available for downlink within the allotted data rate. We present the operational concept, results of ground testing using the Limb sensor engineering unit and estimates of expected on-orbit performance.
OMPS Limb Sensor II: Novel Operations to Fix Data Artifacts
The OMPS Limb sensor flying on the Suomi-NPP mission measures vertically-resolved Earth limb spectral radiance profiles to derive a high vertical resolution ozone profile using both UV and visible light dispersed by a prism and imaged onto a single CCD. The measurement challenges include a wide dynamic range in both spectral and spatial directions and demanding stray light requirements, especially for the UV wavelengths. The proposed operational change from Suomi NPP to JPSS2 eliminates a multiple image approach and reduces stray light levels through use of different images for different wavelength channels. Through use of a stepped integration time scheme and on-board image consolidation, the spectral radiance measurements are improved and more pixels are available for downlink within the allotted data rate. We present the operational concept, results of ground testing using the Limb sensor engineering unit and estimates of expected on-orbit performance.