Precision blackbody sources for radiometric standards

Sapritsky, Victor I.; Khlevnoy, B. B.; Khromchenko, Vladimir B.; Lisiansky, Boris E.; Mekhontsev, S N; Melenevsky, U. A.; Morozova, S. P.; Prokhorov, Alexander; Samoilov, L. N.; Shapoval, V. I.; Sudarev, Konstantin A.; Zelener, M F

doi:10.1364/ao.36.005403

Cited by 47 publications

(38 citation statements)

References 11 publications

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“…The instrument was calibrated at PhysikalischTechnische Bundesanstalt (PTB, Braunschweig in Germany) before launch in 2008. The pre-flight absolute calibration of each SOLAR/SOLSPEC channel was carried out with the BB 3200pg blackbody of PTB (Sapritsky et al 1997;Sperfeld et al 1998Sperfeld et al , 2000Sperfeld et al , 2013. In-flight, regular acquisition with lamps system were performed to track the effects of instrument aging.…”

Section: Solar/solspec Design and Backgroundmentioning

confidence: 99%

SOLAR-ISS: A new reference spectrum based on SOLAR/SOLSPEC observations

Meftah

Damé

Bolsée

et al. 2018

A&A

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Context. Since April 5, 2008 and up to February 15, 2017, the SOLar SPECtrometer (SOLSPEC) instrument of the SOLAR payload on board the International Space Station (ISS) has performed accurate measurements of solar spectral irradiance (SSI) from the middle ultraviolet to the infrared (165 to 3088 nm). These measurements are of primary importance for a better understanding of solar physics and the impact of solar variability on climate. In particular, a new reference solar spectrum (SOLAR-ISS) is established in April 2008 during the solar minima of cycles 23-24 thanks to revised engineering corrections, improved calibrations, and advanced procedures to account for thermal and aging corrections of the SOLAR/SOLSPEC instrument. Aims. The main objective of this article is to present a new high-resolution solar spectrum with a mean absolute uncertainty of 1.26% at 1σ from 165 to 3000 nm. This solar spectrum is based on solar observations of the SOLAR/SOLSPEC space-based instrument. Methods. The SOLAR/SOLSPEC instrument consists of three separate double monochromators that use concave holographic gratings to cover the middle ultraviolet (UV), visible (VIS), and infrared (IR) domains. Our best ultraviolet, visible, and infrared spectra are merged into a single absolute solar spectrum covering the 165-3000 nm domain. The resulting solar spectrum has a spectral resolution varying between 0.6 and 9.5 nm in the 165-3000 nm wavelength range. We build a new solar reference spectrum (SOLAR-ISS) by constraining existing high-resolution spectra to SOLAR/SOLSPEC observed spectrum. For that purpose, we account for the difference of resolution between the two spectra using the SOLAR/SOLSPEC instrumental slit functions. Results. Using SOLAR/SOLSPEC data, a new solar spectrum covering the 165-3000 nm wavelength range is built and is representative of the 2008 solar minimum. It has a resolution better than 0.1 nm below 1000 nm and 1 nm in the 1000-3000 nm wavelength range. The new solar spectrum (SOLAR-ISS) highlights significant differences with previous solar reference spectra and with solar spectra based on models. The integral of the SOLAR-ISS solar spectrum yields a total solar irradiance of 1372.3 ± 16.9 Wm −2 at 1σ, that is yet 11 Wm −2 over the value recommended by the International Astronomical Union in 2015.

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Section: Solar/solspec Design and Backgroundmentioning

confidence: 99%

SOLAR-ISS: A new reference spectrum based on SOLAR/SOLSPEC observations

Meftah

Damé

Bolsée

et al. 2018

A&A

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“…The blackbody source BB3200pg at the PTB was used in June 2007 for the absolute calibration of SOLAR/SOLSPEC above 200 nm. The blackbody is a primary standard for the realization and dissemination of spectral irradiance; it is described in detail in Sperfeld et al (1998), Sperfeld et al (2000), Sperfeld et al (2010) and Sapritsky et al (1997) and summarized in Bolsée et al (2014) for SO-LAR/SOLSPEC applications. The blackbody provides a very stable reference source of known spectral radiance using Planck's law.…”

Section: Absolute Radiometric Calibrationmentioning

confidence: 99%

SOLAR/SOLSPEC mission on ISS: In-flight performance for SSI measurements in the UV

Bolsée

Pereira

Gillotay

et al. 2017

A&A

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Context. The SOLar SPECtrum (SOLSPEC) experiment is part of the Solar Monitoring Observatory (SOLAR) payload, and has been externally mounted on the Columbus module of the International Space Station (ISS) since 2008. SOLAR/SOLSPEC combines three absolutely calibrated double monochromators with concave gratings for measuring the solar spectral irradiance (SSI) from 166 nm to 3088 nm. This physical quantity is a key input for studies of climatology, planetary atmospheres, and solar physics. Aims. A general description of the instrument is given, including in-flight operations and performance of the ultraviolet (UV) channel from 175 nm to 340 nm. Methods. We developed a range of processing and correction methods, which are described in detail. For example, methods for correcting thermal behavior effects, instrument linearity, and especially the accuracy of the wavelength and absolute radiometric scales have been validated by modeling the standard uncertainties. Results. The deliverable is a quiet Sun UV reference solar spectrum as measured by SOLAR/SOLSPEC during the minimum of solar activity prior to cycle 24. Comparisons with other instruments measuring SSI are also presented.

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“…The furnace accommodates a fixed-point cell of 24 mm outer diameter and is similar to, but with a larger heater than, the pyrographite (PG) blackbody BB3200pg [8].…”

Section: General Designmentioning

confidence: 99%

Investigation of Furnace Uniformity and its Effect on High-Temperature Fixed-Point Performance

et al. 2008

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A large-area furnace BB3500YY was designed and built at the VNIIOFI as a furnace for high-temperature metal (carbide)-carbon (M(C)-C) eutectic fixed points and was then investigated at the NMIJ. The dependence of the temperature uniformity of the furnace on various heater and cell holder arrangements was investigated. After making some improvements, the temperature of the central part of the furnace was uniform to within 2 K over a length of 40 mm-the length of the fixedpoint cell-at a temperature of 2,500 • C. With this furnace, the melting plateaux of Re-C and TiC-C were shown to be better than those observed in other furnaces. For instance, a Re-C cell showed melting plateaux with a 0.1 K melting range and a duration of about 40 min. Furthermore, to verify the capability of the furnace to fill cells, one Re-C and one TiC-C cell were made using the BB3500YY. The cells were then compared to a Re-C cell made in a Nagano furnace and a TiC-C cell filled in a BB3200pg furnace. The agreement in plateau shapes demonstrates the capability of the BB3500YY furnace to also function as a filling furnace.

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Precision blackbody sources for radiometric standards

Cited by 47 publications

References 11 publications

SOLAR-ISS: A new reference spectrum based on SOLAR/SOLSPEC observations

SOLAR-ISS: A new reference spectrum based on SOLAR/SOLSPEC observations

SOLAR/SOLSPEC mission on ISS: In-flight performance for SSI measurements in the UV

Investigation of Furnace Uniformity and its Effect on High-Temperature Fixed-Point Performance

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