The absolute solar spectral irradiance from 200 to 2500nm as measured by the SOLSPEC spectrometer with the ATLAS and EURECA missions

Thuillier, G.; Hersé, M.; Simon, P. C.; Labs, D.; Mandel, H.; Gillotay, D.; Petermans, W.

doi:10.1016/s1464-1917(00)00035-0

Cited by 162 publications

(236 citation statements)

References 11 publications

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“…This suggests that the 3.7-m irradiance may be similarly underestimated in our calculations by perhaps 2%. Such an error is higher than what is estimated from the atomic data uncertainty but well within the combined error of the atomic data plus observations (ϳ2% according to Thuillier et al 2003).…”

Section: A Overview Of the Modelsupporting

confidence: 56%

“…However, the SRPM computed irradiance spectrum is 2.2% below Thuillier et al (2003) at their longest measured wavelength (2.40 m). This suggests that the 3.7-m irradiance may be similarly underestimated in our calculations by perhaps 2%.…”

Section: A Overview Of the Modelmentioning

confidence: 79%

“…The model consists of solar atmospheric parameters as a function of height that are based on earlier work and constrained by comparisons with available ground and space observations of line profiles and continuum of the emitted radiance at visible and infrared wavelengths. Among these observations, absolutely calibrated space-based observations of the solar spectral irradiance in the visible and near IR, especially those from the solar spectrum spectrometer (SOLSPEC; Thuillier et al 2003), provide an absolute temperature scale. Because these absolutely calibrated observations used for the models were obtained at shorter wavelengths (e.g., maximum wavelength from Thuillier et al is 2.4 m), the computed spectral irradiance in the 3.7-m band relies on the physical model of the solar atmosphere derived from those observations and knowledge of absorption and emission radiative coefficients in the solar atmosphere.…”

Section: A Overview Of the Modelmentioning

confidence: 99%

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Model Calculations of Solar Spectral Irradiance in the 3.7-μm Band for Earth Remote Sensing Applications

Platnick

Fontenla

2008

Journal of Applied Meteorology and Climatology

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Since the launch of the first Advanced Very High Resolution Radiometer (AVHRR) instrument aboard the Television and Infrared Observational Satellite (TIROS-N), measurements in the 3.7-m atmospheric window have been exploited for use in cloud detection and screening, cloud thermodynamic phase and surface snow/ice discrimination, and quantitative cloud particle size retrievals. The utility of the band has led to the incorporation of similar channels on a number of existing satellite imagers and future operational imagers. Daytime observations in the band include both reflected solar and thermal emission energy. Since 3.7-m channels are calibrated to a radiance scale (via onboard blackbodies), knowledge of the top-ofatmosphere solar irradiance in the spectral region is required to infer reflectance. Despite the ubiquity of 3.7-m channels, absolute solar spectral irradiance data come from either a single measurement campaign (Thekaekara et al.) or synthetic spectra. In the current study, the historical 3.7-m band spectral irradiance datasets are compared with the recent semiempirical solar model of the quiet sun by Fontenla et al. The model has expected uncertainties of about 2% in the 3.7-m spectral region. The channel-averaged spectral irradiances using the observations reported by Thekaekara et al. are found to be 3.2%-4.1% greater than those derived from the Fontenla et al. model for Moderate Resolution Imaging Spectroradiometer (MO-DIS) and AVHRR instrument bandpasses; the Kurucz spectrum, as included in the Moderate Spectral Resolution Atmospheric Transmittance (MODTRAN4) distribution, gives channel-averaged irradiances 1.2%-1.5% smaller than the Fontenla model. For the MODIS instrument, these solar irradiance uncertainties result in cloud microphysical retrieval uncertainties that are comparable to other fundamental reflectance error sources.

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Section: A Overview Of the Modelsupporting

confidence: 56%

Section: A Overview Of the Modelmentioning

confidence: 79%

Section: A Overview Of the Modelmentioning

confidence: 99%

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Model Calculations of Solar Spectral Irradiance in the 3.7-μm Band for Earth Remote Sensing Applications

Platnick

Fontenla

2008

Journal of Applied Meteorology and Climatology

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“…Conversely, the sun is so bright that direct observation will saturate detectors designed for relatively faint aurora. Thuillier et al (2003) provide an absolutely calibrated distribution of flux vs. wavelength at 1 AU with subnanometer spectral resolution. For a nominal instrument solid angle of 2 millisteradians (3 • of arc) the apparent solar brightness at 556 nm is roughly 3 teraRayleighs per nanometer (Table 2).…”

Section: Astronomical Sourcesmentioning

confidence: 99%

“…Spectra of solar irradiance (green shaded curve) from Thuillier et al (2003) and Jupiter albedo (blue line) from Karkoschka (1998). Inset displays the same quantities for the range of wavelengths associated with most visible aurora.…”

Section: Astronomical Sourcesmentioning

confidence: 99%

Auroral meridian scanning photometer calibration using Jupiter

Jackel

Unick

Creutzberg

et al. 2016

Geosci. Instrum. Method. Data Syst.

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Abstract. Observations of astronomical sources provide information that can significantly enhance the utility of auroral data for scientific studies. This report presents results obtained by using Jupiter for field cross calibration of four multispectral auroral meridian scanning photometers during the 2011-2015 Northern Hemisphere winters. Seasonal average optical field-of-view and local orientation estimates are obtained with uncertainties of 0.01 and 0.1 • , respectively. Estimates of absolute sensitivity are repeatable to roughly 5 % from one month to the next, while the relative response between different wavelength channels is stable to better than 1 %. Astronomical field calibrations and darkroom calibration differences are on the order of 10 %. Atmospheric variability is the primary source of uncertainty; this may be reduced with complementary data from co-located instruments.

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Suomi NPP VIIRS sensor data record verification, validation, and long‐term performance monitoring

et al. 2013

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The successful launch of the Suomi National Polar‐orbiting Partnership Satellite on 28 October 2011 with the key instrument Visible Infrared Imaging Radiometer Suite signifies a new era of moderate‐resolution imaging capabilities following the legacy of AVHRR and Moderate‐Resolution Imaging Spectroradiometer (MODIS). After a year and half of calibration and validation, the Visible Infrared Imaging Radiometer Suite (VIIRS) instrument is performing very well. By early 2013, the sensor data records have achieved provisional maturity status and have been used in the routine production of more than 20 environmental data records by users worldwide. Based on comparisons with MODIS, the VIIRS reflective solar band radiometric uncertainties are now comparable in reflectance to that of MODIS Collection 6 equivalent bands (within 2%) although radiance differences could be larger for several bands, while an agreement on the order of 0.1 K has also been achieved for the thermal emissive bands, except for bands with significant spectral differences or certain bands at extreme temperatures (below 200 K or above 343 K). The degradation in the VIIRS rotating telescope assembly mirrors is gradually leveling off after reaching ~30% and thus far has limited impact on instrument performance and products. Environmental data record users are generally satisfied with the VIIRS data quality which meets the product requirements. While the specific technical details are documented in other papers in this special issue and in Cao et al. (2013a), this paper focuses on the major findings of VIIRS calibration and validation since launch, radiometric performance validation, and uncertainties, as well as lessons learned.

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The absolute solar spectral irradiance from 200 to 2500nm as measured by the SOLSPEC spectrometer with the ATLAS and EURECA missions

Cited by 162 publications

References 11 publications

Model Calculations of Solar Spectral Irradiance in the 3.7-μm Band for Earth Remote Sensing Applications

Model Calculations of Solar Spectral Irradiance in the 3.7-μm Band for Earth Remote Sensing Applications

Auroral meridian scanning photometer calibration using Jupiter

Suomi NPP VIIRS sensor data record verification, validation, and long‐term performance monitoring

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