radiance 3301 3547 TC irradiance 2698 2895 Post-Launch Performance Meet the specification with margins. Figure 2: OMPS Nadir Mapper earth view noise as percent of the earth view signal. The root mean square residuals in percent were computed from an Empirical Orthogonal Function Analysis where the six largest patterns were removed. For the NM sensor, shown on the left, the residuals equate to signal-to-noise ratios of better than 2000:1 for wavelengths greater than 320 nm, dropping to 1000:1 at the shorter wavelengths. For the NP sensor, shown on the right, the SNR varies from 550:1 at the longer wavelength to 250:1 for the shortest; spikes correspond to lower signal levels due to solar lines at those wavelengths. Figure 3: SNR from solar views (working diffuser) for OMPS NP (left) and NM (right). The dotted red line in each figure is the required SNR. Albedo Calibration Specification The wavelength independent radiometric (albedo) calibration uncertainty shall be less than 2%. The wavelength dependent radiometric (albedo) calibration uncertainty shall be less than 0.5% [2]. Pre-Launch Error Budget Albedo 1σ Fractional Uncertainty (%) - independent - dependent λ λ Source of Uncertainty NP TC NP TC Requirement 2.0 2.0 0.5 0.5 Pre-Launch Performance Albedo 1σ Fractional Uncertainty (%) Source of - independent - dependent λ λ Uncertainty NP TC NP TC OMPS NPP RSS 1.653 1.717 0.426 0.497 Total
TC radiance 3301 3547 irradiance 2698 2895 Post-Launch Performance Meet the specification with margins. Figure 2: OMPS Nadir Mapper earth view noise as percent of the earth view signal. The root mean square residuals in percent were computed from an Empirical Orthogonal Function Analysis where the six largest patterns were removed. For the NM sensor, shown on the left, the residuals equate to signal-to-noise ratios of better than 2000:1 for wavelengths greater than 320 nm, dropping to 1000:1 at the shorter wavelengths. For the NP sensor, shown on the right, the SNR varies from 550:1 at the longer wavelength to 250:1 for the shortest; spikes correspond to lower signal levels due to solar lines at those wavelengths. Figure 3: SNR from solar views (working diffuser) for OMPS NP (left) and NM (right). The dotted red line in each figure is the required SNR. Albedo Calibration Specification The wavelength independent radiometric (albedo) calibration uncertainty shall be less than 2%. The wavelength dependent radiometric (albedo) calibration uncertainty shall be less than 0.5% [2]. Pre-Launch Error Budget Source of Uncertainty Albedo 1σ Fractional Uncertainty (%) λ - independent λ - dependent NP TC NP TC Requirement 2.0 2.0 0.5 0.5 Pre-Launch Performance Source of Uncertainty Albedo 1σ Fractional Uncertainty (%) λ - independent λ - dependent NP TC NP TC OMPS NPP RSS Total 1.653 1.717 0.426 0.497
OMPS_SDR_Error_Budget2015[1].docx