Pre-Launch Radiometric Characterization of JPSS-1 VIIRS Thermal Emissive Bands

McIntire, Jeff; Moyer, David; Oudrari, Hassan; Xiong, Xiaoxiong

doi:10.3390/rs8010047

Cited by 12 publications

(14 citation statements)

References 11 publications

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“…The Wang et al method assumes that C-coefficients are reasonably well characterized prelaunch, although small errors may exist in the prelaunch RVS. For NOAA-20, prelaunch C-coefficients used in this study were derived using measurements from an external NIST traceable blackbody calibration source, located inside the thermal vacuum chamber at a fixed scan angle (~+41 • ) [19]. As a result, prelaunch RVS at this scan angle was used for characterizing the prelaunch C-coefficients.…”

Section: The Wang Et Al Methodsmentioning

confidence: 99%

A New Method for Characterizing NOAA-20/S-NPP VIIRS Thermal Emissive Bands Response Versus Scan Using On-Orbit Pitch Maneuver Data

2019

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The on-orbit calibration of Visible Infrared Imaging Radiometer Suite (VIIRS) Thermal Emissive Bands (TEB), onboard the National Oceanic and Atmospheric Administration-20 (NOAA-20) and the Suomi National Polar-orbiting Partnership (S-NPP) satellites, have been stable during nominal operations. However, larger than expected scan angle/scene temperature dependent biases, relative to the co-located Cross-track Infrared Sounder (CrIS) observations, were observed in the NOAA-20 longwave infrared (LWIR) bands. The Response Versus Scan (RVS) effect—the variation of instrument reflectance of source radiance with scan angle, is a significant contributor to VIIRS calibration. TEB RVS is characterized using prelaunch test data and verified on-orbit using pitch maneuver data. This study presents a new method that characterizes VIIRS on-orbit TEB RVS at both Earth View (EV) and Space View (SV) scan angles simultaneously. This method was compared with an existing on-orbit RVS method (the Wu et al. method), which derives RVS at EV scan angles using pitch maneuver data and extrapolates SV RVS from EV. The new method derived on-orbit RVS differ from prelaunch values up to 1.0% at the beginning of scan in the NOAA-20 LWIR bands, and ~0.5% in S-NPP M15. VIIRS–CrIS inter-comparison results indicates that the new method derived on-orbit RVS can effectively minimize LWIR scan angle/scene temperature dependent biases, with scan averaged biases reduced from 0.40K to 0.15K for NOAA-20 LWIR bands, and from 0.24K to 0.08K for S-NPP M15. The Wu et al. method can also reduce the scan angle dependent biases, but at the expense of increasing the scene temperature dependent biases.

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Section: The Wang Et Al Methodsmentioning

confidence: 99%

A New Method for Characterizing NOAA-20/S-NPP VIIRS Thermal Emissive Bands Response Versus Scan Using On-Orbit Pitch Maneuver Data

2019

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“…The TEB radiometric calibration coefficients were determined for all detectors, HAM sides, electronics sides and temperature plateaus [16]. This analysis has shown TEB performing as expected, with radiometric fitting dominated by the linear term (gain), while both offset and non-linear term are very small, on the order of 10 −1 and less than 10 −7 respectively.…”

Section: Of 24mentioning

confidence: 71%

“…The moderate resolution bands (M-bands) and imaging resolution bands (I-bands) have a spatial resolution at nadir of~750 m and~375 m respectively, while the ground swath is~3040 km. Each M-band and I-band has 16 and 32 detectors respectively, aligned parallel to the direction of spacecraft motion to image the Earth with footprints adjacent to each other. Notes: Dual-gain M-bands have two entries, one for high-gain (HG) and one for low-gain (LG).…”

Section: Sensor Design and Improvementsmentioning

confidence: 99%

An Overall Assessment of JPSS-2 VIIRS Radiometric Performance Based on Pre-Launch Testing

et al. 2018

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The Visible Infrared Imaging Radiometer Suite (VIIRS) on-board the second Joint Polar Satellite System (JPSS) completed its sensor level testing in February 2018. The JPSS-2 (J2) mission is scheduled to launch in 2022 and will be very similar to its two predecessor missions, the Suomi National Polar-orbiting Partnership (SNPP) mission, launched on 28 October 2011 and JPSS-1 (renamed NOAA-20) launched on 18 November 2017. VIIRS instrument has 22 spectral bands covering the spectrum between 0.4 and 12.6 µm: 14 reflective solar bands (RSB), 7 thermal emissive bands (TEB) and one day-night band (DNB). It is a cross-track scanning radiometer capable of providing global measurements through observations at two spatial resolutions, 375 m and 750 m at nadir for the imaging bands and moderate bands, respectively. This paper will provide an overview of J2 VIIRS characterization methodologies and calibration performance during the pre-launch testing phases performed by the National Aeronautics and Space Administration (NASA) VIIRS Characterization Support Team (VCST) to evaluate the at-launch baseline radiometric performance and generate the parameters needed to populate the sensor data record (SDR) Look-Up- Tables (LUTs). Our analysis results confirmed the good performance of J2 VIIRS, in general as good as previous VIIRS instruments and all non-compliances are expected to have low impact on data quality. Key sensor performance metrics include the signal to noise ratio (SNR), radiance dynamic range, reflective and emissive bands calibration performance, polarization sensitivity, spectral performance, response versus scan-angle (RVS) and scattered light response. A set of performance metrics generated during the pre-launch testing program will be compared to both the SNPP and JPSS-1 VIIRS sensors. provided the outline of the paper, contributed to the introduction, the sensor design and the sensor testing and the compilation of the final paper. J.M.: Provided the thermal emissive bands performance assessment, the response versus scan-angle performance and the polarization sensitivity assessment. X.X.: Contributed to the sensor design and testing description and the review of the paper at multiple phases to enhance quality and consistency. J.B.: Provided the contribution to the sensor design and testing description and the review of the paper at multiple phases to enhance quality and consistency. Q.J.: Provided the reflective solar bands performance, the stray light performance and near field performance assessments. T.S.: Provided the relative spectral response assessments and contributions to the near field response performance and DNB calibration. A.A.: Contributed to the reflective solar bands performance and the editing of the manuscript's plots and tables.Funding: This research received no external funding.

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“…The test program used for JPSS-2 VIIRS was very similar to that employed for JPSS-1 VIIRS [12]. There were four blackbodies used in testing.…”

Section: Testing Overviewmentioning

confidence: 99%

Pre-launch Radiometric Characterization of JPSS-2 VIIRS Thermal Emissive Bands

et al. 2019

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The Joint Polar Satellite System 2 (JPSS-2) Visible Infrared Imaging Radiometer Suite (VIIRS) is the third in its series of sensors designed to produce high quality data products for environmental and climate data records once launched. To meet this goal, the VIIRS instrument must be calibrated and characterized prior to launch. A comprehensive test program was conducted at the Raytheon Space and Airborne Systems facility in 2016–2017, including extensive environmental testing. The pre-launch thermal band radiometric performance and stability is the focus of this work including: the evaluation of a number of sensor performance metrics, comparison to the design requirements, and the estimation of uncertainties. Comparisons of the thermal band performance to the earlier Suomi National Polar-orbiting Partnership (SNPP) and JPSS-1 VIIRS instruments as well as the design specifications have shown that JPSS-2 VIIRS exhibits similar performance to its predecessors. The differences of note (decreased blackbody uniformity, reduced dynamic range for bands M15 and M16, and improved performance with respect to striping) are small and not expected to have a significant impact on the science products.

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Pre-Launch Radiometric Characterization of JPSS-1 VIIRS Thermal Emissive Bands

Cited by 12 publications

References 11 publications

A New Method for Characterizing NOAA-20/S-NPP VIIRS Thermal Emissive Bands Response Versus Scan Using On-Orbit Pitch Maneuver Data

A New Method for Characterizing NOAA-20/S-NPP VIIRS Thermal Emissive Bands Response Versus Scan Using On-Orbit Pitch Maneuver Data

An Overall Assessment of JPSS-2 VIIRS Radiometric Performance Based on Pre-Launch Testing

Pre-launch Radiometric Characterization of JPSS-2 VIIRS Thermal Emissive Bands

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