JPSS-1 VIIRS prelaunch spectral characterization and performance

Moeller, Christopher C.; Schwarting, Tom; McIntire, Jeff; Moyer, David

doi:10.1117/12.2188658

Cited by 10 publications

(12 citation statements)

References 4 publications

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“…RVS is the AOI dependent, relative reflectance of the HAM [12]; in Equation (1), it is at the view angle of the BCS. The radiances of the sources (L) are determined via Planck's law, convolved over the extended bandpass of the spectral transmittance of each band [13]. The temperature of each source is determined from one or more thermistors located on or near each component.…”

Section: Radiometric Performancementioning

confidence: 99%

“…Each of these radiances was converted from a temperature provided by one or more thermistors once per scan (or for the external sources, temperature readings about every 10 s) using the Planck equation, integrated over the spectral response of each band [13]. The error is composed of four components: temperature, spectral, interpolation, and statistical uncertainties.…”

Section: Uncertaintymentioning

confidence: 99%

“…In some cases, more than one thermistor was used for a source in the thermal model; in those cases the average value was used. Data was supplied on the external sources (BCS, TMCBB, and SVS) about every 10 s, from which collection averaged temperature values were determined, and then radiances derived (a Planck function of the temperature reading convolved with the band averaged spectral response functions [13]) and inserted into the equations in Section 2. The telemetry of interest for the thermal model were the RTA, CAV, SH, and HAM temperatures as described in Section 2; these temperatures were also convolved with the band averaged spectral response functions and inserted into the equations in Section 2.…”

Section: Data Quality and Reductionmentioning

confidence: 99%

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

et al. 2016

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Pre-launch characterization and calibration of the thermal emissive spectral bands on the Joint Polar Satellite System (JPSS-1) Visible Infrared Imaging Radiometer Suite (VIIRS) is critical to ensure high quality data products for environmental and climate data records post-launch. A comprehensive test program was conducted at the Raytheon El Segundo facility in 2013-2014, including extensive environmental testing. This work is focused on the thermal band radiometric performance and stability, including evaluation of a number of sensor performance metrics and estimation of uncertainties. Analysis has shown that JPSS-1 VIIRS thermal bands perform very well in relation to their design specifications, and comparisons to the Suomi National Polar-orbiting Partnership (SNPP) VIIRS instrument have shown their performance to be comparable.

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Section: Radiometric Performancementioning

confidence: 99%

Section: Uncertaintymentioning

confidence: 99%

Section: Data Quality and Reductionmentioning

confidence: 99%

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

et al. 2016

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“…The Visible Near Infrared (VisNIR) FPA (bands I1, I2 and M1-M7) covers a spectral range of 395-900 nm. The Day Night Band (DNB) has its own FPA with multiple detector arrays for each of its three gain stages and is a panchromatic band with a spectral range of 500-900 nm [5]. There are two cold focal planes with the Short-and Mid-wave Wavelength Infrared (SMWIR) FPA (bands I3, I4 and M8-M13) covering a spectral region of 1230-4130 nm while the Long Wavelength Infrared (LWIR) FPA (bands I5 and M14-M16) covers the 8400-12,490 nm wavelength range.…”

Section: Introductionmentioning

confidence: 99%

JPSS-1 VIIRS Pre-Launch Response Versus Scan Angle Testing and Performance

et al. 2016

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Abstract:The Visible Infrared Imaging Radiometer Suite (VIIRS) instruments on-board both the Suomi National Polar-orbiting Partnership (S-NPP) and the first Joint Polar Satellite System (JPSS-1) spacecraft, with launch dates of October 2011 and December 2016 respectively, are cross-track scanners with an angular swath of˘56.06˝. A four-mirror Rotating Telescope Assembly (RTA) is used for scanning combined with a Half Angle Mirror (HAM) that directs light exiting from the RTA into the aft-optics. It has 14 Reflective Solar Bands (RSBs), seven Thermal Emissive Bands (TEBs) and a panchromatic Day Night Band (DNB). There are three internal calibration targets, the Solar Diffuser, the BlackBody and the Space View, that have fixed scan angles within the internal cavity of VIIRS. VIIRS has calibration requirements of 2% on RSB reflectance and as tight as 0.4% on TEB radiance that requires the sensor's gain change across the scan or Response Versus Scan angle (RVS) to be well quantified. A flow down of the top level calibration requirements put constraints on the characterization of the RVS to 0.2%-0.3% but there are no specified limitations on the magnitude of response change across scan. The RVS change across scan angle can vary significantly between bands with the RSBs having smaller changes of~2% and some TEBs having~10% variation. Within a band, the RVS has both detector and HAM side dependencies that vary across scan. Errors in the RVS characterization will contribute to image banding and striping artifacts if their magnitudes are above the noise level of the detectors. The RVS was characterized pre-launch for both S-NPP and JPSS-1 VIIRS and a comparison of the RVS curves between these two sensors will be discussed.

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“…VIIRS sensor level spectral testing was performed using a double monochromator source, the Spectral Measurement Assembly (SpMA) in ambient for the VisNIR bands, and in the TV environment at nominal plateau for the SMWIR and LWIR bands [18]. The monochromator exit slit image was aligned to illuminate one spectral band at a time, and the spectral response was measured over a spectral region covering roughly the acceptance of the dichroic spectral bandpass.…”

Section: Relative Spectral Response (Rsr)mentioning

confidence: 99%

JPSS-1 VIIRS Radiometric Characterization and Calibration Based on Pre-Launch Testing

et al. 2016

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Abstract:The Visible Infrared Imaging Radiometer Suite (VIIRS) on-board the first Joint Polar Satellite System (JPSS) completed its sensor level testing on December 2014. The JPSS-1 (J1) mission is scheduled to launch in December 2016, and will be very similar to the Suomi-National Polar-orbiting Partnership (SNPP) mission. VIIRS instrument has 22 spectral bands covering the spectrum between 0.4 and 12.6 µm. It is a cross-track scanning radiometer capable of providing global measurements twice daily, through observations at two spatial resolutions, 375 m and 750 m at nadir for the imaging and moderate bands, respectively. This paper will briefly describe J1 VIIRS characterization and calibration performance and methodologies executed during the pre-launch testing phases by the government independent team to generate the at-launch baseline radiometric performance and the metrics needed to populate the sensor data record (SDR) Look-Up- Tables (LUTs). This paper will also provide an assessment of the sensor pre-launch radiometric performance, such as the sensor signal to noise ratios (SNRs), radiance dynamic range, reflective and emissive bands calibration performance, polarization sensitivity, spectral performance, response-vs-scan (RVS), and scattered light response. A set of performance metrics generated during the pre-launch testing program will be compared to both the VIIRS sensor specification and the SNPP VIIRS pre-launch performance.

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JPSS-1 VIIRS prelaunch spectral characterization and performance

Cited by 10 publications

References 4 publications

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

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

JPSS-1 VIIRS Pre-Launch Response Versus Scan Angle Testing and Performance

JPSS-1 VIIRS Radiometric Characterization and Calibration Based on Pre-Launch Testing

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