VIIRS solar diffuser bidirectional reflectance distribution function (BRDF) degradation factor operational trending and update

Haas, Evan; Moyer, David; Luccia, Frank De; Rausch, Kameron; Fulbright, Jon P.

doi:10.1117/12.930164

Cited by 31 publications

(19 citation statements)

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“…The SD may have non-negligible SD degradation at the wavelength of the shortest SWIR band, M8 (1238 nm), and the degradation is estimated to be around 0.5% [8,34,35]. The VIIRS SD on-orbit degradation, h(λ), is tracked by the on-board SDSM calibration, as mentioned previously [6][7][8]. VIIRS SDSM calibration was performed for every orbit in the first few months on orbit, and then the operational rate was reduced to once per day, and further reduced to once every two days after 16 May 2014.…”

Section: Sd and Sdsm Calibrationmentioning

confidence: 99%

“…So far, more than 1730 SDSM measurements have been performed for VIIRS. The SDSM has eight detectors with different center wavelengths tracking the SD degradation at the eight wavelengths [6][7][8]. Figure 5 shows the SD degradation derived from the SDSM measurements in symbols.…”

Section: Sd and Sdsm Calibrationmentioning

confidence: 99%

“…The BRF of the SD was measured prelaunch and validated on-orbit using the measurements with yaw maneuvers [9,15,16,32]. The on-orbit degradation of the SD BRF is tracked by an SDSM [6][7][8]. To prevent saturation of the RSB, a screen is placed in the front of the SD port to reduce the intensity of the sunlight.…”

Section: Sd and Sdsm Calibrationmentioning

confidence: 99%

“…τ SDS is the VF of the SD screen, h(λ) is the on-orbit SD degradation, called H-factors [6][7][8], tracked by the SDSM and is normalized to 28 October 2011, and d VS is the VIIRS-Sun distance. Both the BRF and the VF vary with the incident direction of the sunlight, which can be described by two independent solar angles.…”

Section: Sd and Sdsm Calibrationmentioning

confidence: 99%

“…The VIIRS RSB are calibrated on-orbit with an on-board solar diffuser (SD) [3][4][5], whose performance and degradation is itself tracked by a solar diffuser stability monitor (SDSM) [6][7][8]. The VIIRS RSB on-orbit changes are also monitored with scheduled monthly lunar observations through the instrument's space view (SV) port [9][10][11][12], which is also used to provide the instrument's dark scene response.…”

Section: Introductionmentioning

confidence: 99%

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VIIRS Reflective Solar Bands Calibration Progress and Its Impact on Ocean Color Products

Sun

Wang

2016

Remote Sensing

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Abstract:The radiometric calibration for the reflective solar bands (RSB) of the Visible Infrared Imaging Radiometer Suite (VIIRS) on board the Suomi National Polar-orbiting Partnership (SNPP) platform has reached a mature stage after four years since its launch. The characterization of the vignetting effect of the attenuation screens, the bidirectional reflectance factor of the solar diffuser, the degradation performance of the solar diffuser, and the calibration coefficient of the RSB have all been made robust. Additional investigations into the time-dependent out-of-band relative spectral response and the solar diffuser degradation non-uniformity effect have led to newer insights. In particular, it has been demonstrated that the solar diffuser (SD) degradation non-uniformity effect induces long-term bias in the SD-calibration result. A mitigation approach, the so-called Hybrid Method, incorporating lunar-based calibration results, successfully restores the calibration to achievẽ 0.2% level accuracy. The successfully calibrated RSB data record significantly impacts the ocean color products, whose stringent requirements are especially sensitive to calibration accuracy, and helps the ocean color products to reach maturity.

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Section: Sd and Sdsm Calibrationmentioning

confidence: 99%

Section: Sd and Sdsm Calibrationmentioning

confidence: 99%

Section: Sd and Sdsm Calibrationmentioning

confidence: 99%

Section: Sd and Sdsm Calibrationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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VIIRS Reflective Solar Bands Calibration Progress and Its Impact on Ocean Color Products

Sun

Wang

2016

Remote Sensing

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Automated calibration of the Suomi National Polar‐Orbiting Partnership (S‐NPP) Visible Infrared Imaging Radiometer Suite (VIIRS) reflective solar bands

et al. 2013

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Suomi National Polar‐Orbiting Partnership (S‐NPP) Visible Infrared Imaging Radiometer Suite (VIIRS) reflective bands are currently calibrated via weekly updates to look‐up tables (LUTs) utilized by operational ground processing in the Joint Polar Satellite System Interface Data Processing Segment (IDPS). The parameters in these LUTs must be predicted ahead 2 weeks and cannot adequately track the dynamically varying response characteristics of the instrument. As a result, spurious “predict‐ahead” calibration errors of the order of 0.1% or greater are routinely introduced into the calibrated reflectances and radiances produced by IDPS in sensor data records (SDRs). Spurious calibration errors of this magnitude adversely impact the quality of downstream environmental data records (EDRs) derived from VIIRS SDRs such as Ocean Color/Chlorophyll and cause increased striping and band‐to‐band radiometric calibration uncertainty of SDR products. A novel algorithm that fully automates reflective band calibration has been developed for implementation in IDPS in late 2013. Automating the reflective solar band (RSB) calibration is extremely challenging and represents a significant advancement over the manner in which RSB calibration has traditionally been performed in heritage instruments such as the Moderate Resolution Imaging Spectroradiometer. The automated algorithm applies calibration data almost immediately after their acquisition by the instrument from views of space and on‐onboard calibration sources, thereby eliminating the predict‐ahead errors associated with the current offline calibration process. This new algorithm, when implemented, will significantly improve the quality of VIIRS reflective band SDRs and consequently the quality of EDRs produced from these SDRs.

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Characteristics of Mie Scattering Diffuser for On-board Radiometric Calibration

Qiu

2016

J Indian Soc Remote Sens

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VIIRS solar diffuser bidirectional reflectance distribution function (BRDF) degradation factor operational trending and update

Cited by 31 publications

References 0 publications

VIIRS Reflective Solar Bands Calibration Progress and Its Impact on Ocean Color Products

VIIRS Reflective Solar Bands Calibration Progress and Its Impact on Ocean Color Products

Automated calibration of the Suomi National Polar‐Orbiting Partnership (S‐NPP) Visible Infrared Imaging Radiometer Suite (VIIRS) reflective solar bands

Characteristics of Mie Scattering Diffuser for On-board Radiometric Calibration

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