JPSS-1VIIRS Prelaunch Polarization Testing and Performance

Moyer, David; McIntire, Jeff; Young, James; McCarthy, James K.; Waluschka, Eugène; Xiong, Xiaoxiong; Luccia, Frank J. De

doi:10.1109/tgrs.2016.2645403

Cited by 24 publications

(28 citation statements)

References 14 publications

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“…For band M1, this also includes the transmittance of a long-wave blocking filter, included to reduce the effects of out-of-band leaks in the broadband measurements. 4,6 The Fourier coefficients generated from Eqs. (3) and (4) were resampled to 1 nm from the measured T-SIRCUS wavelengths.…”

Section: Band Dependent Polarization Sensitivitymentioning

confidence: 99%

“…The thirteen measurements per wavelength (assuming there is valid data for all polarizer angles) were used to determine the Fourier coefficients in Eqs. (2) - (4). For the wavelengths where one or more polarizer angles did not have any valid data, some approximations were made to replace the missing data: data from 0 degrees was used to replace missing data at 180 degrees and vice versa; if one polarizer angle was missing, then a linear interpolation across the interval was made.…”

Section: Data Quality and Reductionmentioning

confidence: 99%

“…5 The pre-launch testing used to characterize the J1 polarization sensitivity was conducted with a broadband source in a setup that was nearly identical to that used for S-NPP. [4][5][6] However, these tests provided limited information on the root cause of this sensitivity. Modeling based on limited component level measurements of the optics (developed by Raytheon, using the FRED ray tracing software 6 ) predicted that the polarization sensitivity was caused by larger diattenuation on the edges of the spectral bandpass.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of JPSS J1 VIIRS polarization sensitivity using the NIST T-SIRCUS

et al. 2015

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The polarization sensitivity of the Joint Polar Satellite System (JPSS) J1 Visible Infrared Imaging Radiometer Suite (VIIRS) measured pre-launch using a broadband source was observed to be larger than expected for many reflective bands. Ray trace modeling predicted that the observed polarization sensitivity was the result of larger diattenuation at the edges of the focal plane filter spectral bandpass. Additional ground measurements were performed using a monochromatic source (the NIST T-SIRCUS) to input linearly polarized light at a number of wavelengths across the bandpass of two VIIRS spectral bands and two scan angles. This work describes the data processing, analysis, and results derived from the T-SIRCUS measurements, comparing them with broadband measurements. Results have shown that the observed degree of linear polarization, when weighted by the sensor's spectral response function, is generally larger on the edges and smaller in the center of the spectral bandpass, as predicted. However, phase angle changes in the center of the bandpass differ between model and measurement. Integration of the monochromatic polarization sensitivity over wavelength produced results consistent with the broadband source measurements, for all cases considered.

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Section: Band Dependent Polarization Sensitivitymentioning

confidence: 99%

Section: Data Quality and Reductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of JPSS J1 VIIRS polarization sensitivity using the NIST T-SIRCUS

et al. 2015

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“…As a result, it is important to characterize the sensitivity of the instrument to linearly polarized light in order to ensure that the science data products are accurate. Due to limitations in the available data once the sensor is on orbit, the polarization sensitivity was tested pre-launch by the sensor vendor (Raytheon El Segundo) [2,3]. The result of this baseline testing was unexpectedly large linear diattenuation in the four spectral bands centered between 400 and 600 nm (in many cases the diattenuation was over 3.0% and was as high as 6.4%).…”

Section: Introductionmentioning

confidence: 99%

“…Fourier analysis was used to reduce the data and compute the Mueller matrix components, which were in turn used to construct the linear diattenuation and phase angle [2,5]. The wavelength-dependent linear diattenuation was compared to the ray trace model results, and the linear diattenuation, integrated over each spectral bandpass, was compared to the earlier broadband measurement results.…”

Section: Introductionmentioning

confidence: 99%

Monochromatic measurements of the JPSS-1 VIIRS polarization sensitivity

McIntire¹,

Moyer

Brown

et al. 2016

Appl. Opt.

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Polarization sensitivity is a critical property that must be characterized for spaceborne remote sensing instruments designed to measure reflected solar radiation. Broadband testing of the first Joint Polar-orbiting Satellite System (JPSS-1) Visible Infrared Imaging Radiometer Suite (VIIRS) showed unexpectedly large polarization sensitivities for the bluest bands on VIIRS (centered between 400 and 600 nm). Subsequent ray trace modeling indicated that large diattenuation on the edges of the bandpass for these spectral bands was the driver behind these large sensitivities. Additional testing using the National Institute of Standards and Technology’s Traveling Spectral Irradiance and Radiance Responsivity Calibrations Using Uniform Sources was added to the test program to verify and enhance the model. The testing was limited in scope to two spectral bands at two scan angles; nonetheless, this additional testing provided valuable insight into the polarization sensitivity. Analysis has shown that the derived diattenuation agreed with the broadband measurements to within an absolute difference of about 0.4% and that the ray trace model reproduced the general features of the measured data. Additionally, by deriving the spectral responsivity, the linear diattenuation is shown to be explicitly dependent on the changes in bandwidth with polarization state.

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