Comparison of the NIST SURF and argon miniarc irradiance standards at 214 nm

Lean, J.; Kostkowski, Henry J.; Saunders, Robert D.; Hughey, L. R.

doi:10.1364/ao.28.003246

Cited by 11 publications

(8 citation statements)

References 6 publications

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“…The NIST Ultraviolet Spectroradiometer is one of several double monochromators that were designed and built for NIST in the early 1980s [ 11 , 12 , 13 ]. The design uses a 1/8 m Fastie-Ebert monochromator with mirror and grating blanks of Zerodur to assure thermal stability.…”

Section: Instrument Descriptionsmentioning

confidence: 99%

The 1997 North American Interagency Intercomparison of Ultraviolet Spectroradiometers Including Narrowband Filter Radiometers

Lantz¹,

Disterhoft²,

Early³

et al. 2002

J. Res. Natl. Inst. Stand. Technol.

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The fourth North American Intercomparison of Ultraviolet Monitoring Spectroradiometers was held September 15 to 25, 1997 at Table Mountain outside of Boulder, Colorado, USA. Concern over stratospheric ozone depletion has prompted several government agencies in North America to establish networks of spectroradiometers for monitoring solar ultraviolet irradiance at the surface of the Earth. The main purpose of the Intercomparison was to assess the ability of spectroradiometers to accurately measure solar ultraviolet irradiance, and to compare the results between instruments of different monitoring networks. This Intercomparison was coordinated by NIST and NOAA, and included participants from the ASRC, EPA, NIST, NSF, SERC, USDA, and YES. The UV measuring instruments included scanning spectroradiometers, spectrographs, narrow band multi-filter radiometers, and broadband radiometers. Instruments were characterized for wavelength accuracy, bandwidth, stray-light rejection, and spectral irradiance responsivity. The spectral irradiance responsivity was determined two to three times outdoors to assess temporal stability. Synchronized spectral scans of the solar irradiance were performed over several days. Using the spectral irradiance responsivities determined with the NIST traceable standard lamp, and a simple convolution technique with a Gaussian slit-scattering function to account for the different bandwidths of the instruments, the measured solar irradiance from the spectroradiometers excluding the filter radiometers at 16.5 h UTC had a relative standard deviation of ±4 % for wavelengths greater than 305 nm. The relative standard deviation for the solar irradiance at 16.5 h UTC including the filter radiometer was ±4 % for filter functions above 300 nm.

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Section: Instrument Descriptionsmentioning

confidence: 99%

The 1997 North American Interagency Intercomparison of Ultraviolet Spectroradiometers Including Narrowband Filter Radiometers

Lantz¹,

Disterhoft²,

Early³

et al. 2002

J. Res. Natl. Inst. Stand. Technol.

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show abstract

“…The wavelength of the recorded signal depends on the orientation of the grating; the strength of the recorded signal depends on many factors pertaining to the radiation source (the magnitude, polarization, and direction of the emitted rays), to the spectrometer (the dependence of the responsivity on the magnitude, polarization, and direction on the incident rays), and to certain environmental conditions (such as the presence of external stray radiations, temperature, and the diffracting medium). Becaiase laboratory UV irradiance sources used for instrument calibration purposes may be quite different, radiometrically, from the Sun, the dependence of the instrument signal on these radiometric differences must be thoroughly characterized so that calibration errors arising from these differences are minimized and can be evaluated [Kostkowski et al, 1986;Lean et al, 1989]. Differences in relative spectral distributions and flux magnitude are illustrated in Figure 5.…”

Section: Radiometric Characterization Of Susim-uarsmentioning

confidence: 99%

The Solar Ultraviolet Spectral Irradiance Monitor (SUSIM) experiment on board the Upper Atmosphere Research Satellite (UARS)

Brueckner¹,

et al. 1993

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The state of solar ultraviolet irradiance measurements in 1978, when NASA requested proposals for a new generation of solar ultraviolet monitors to be flown on the Upper Atmosphere Research Satellite (UARS), is described. To overcome the radiometric uncertainties that plagued the measurements at this time, the solar ultraviolet spectral irradiance monitor (SUSIM) instrument design included in‐flight calibration light sources and multichannel photometers. Both are aimed at achieving a maximum precision of the SUSIM measurements over a long period of time, e.g., one solar cycle. The design of the SUSIM‐UARS instrument is compared with the original design specifications for the UARS instruments. Details including optical train, filters, detectors, and contamination precautions are described. Also discussed are the SUSIM‐UARS preflight calibration and characterization, as well as the results of the inflight performance of the instrument during the first 3 months of operation. Finally, flight operations, observation strategy, and data reduction schemes are outlined.

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“…The spectroradiometer used for this spectral irradiance comparison had a 0.125 m f/4.7 Fastie-Ebert double monochromator. This monochromator was described previously in the two prior source comparisons at SURF [ 10 , 11 ] and the instrument was reconfigured for this comparison with a new computer control and data acquisition system, detectors, electronics, and foreoptics. The monochromator was equipped with a 3600 groove per millimeter replica ruled grating blazed at 100 nm, and the entrance and exit slits were 5 mm in height and 0.55 mm in width, which produced a spectral bandpass of approximately 1 nm.…”

Section: Spectroradiometermentioning

confidence: 99%

“…This intercomparison produced anomalous results in which UV spectral irradiance measurements performed by the different laboratories disagreed with each other by 5 % to 10 %. The NIST scales of UV spectral irradiance have been compared previously: SURF II irradiance was compared with tungsten-halogen standards [ 9 ] and with an argon miniarc [ 10 ]. The spectral irradiance comparison of SURF II with tungsten-halogen lamps was done at two wavelengths (254 nm and 297 nm) and agreement between the spectral irradiances was on the order of 1 %, well within the relative combined standard uncertainties.…”

Section: Introductionmentioning

confidence: 99%

Ultraviolet Spectral Irradiance Scale comparison: 210 nm to 300 nm

Thompson

Early

O’Brian

1998

J. Res. Natl. Inst. Stand. Technol.

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Comparison of the irradiances from a number of ultraviolet spectral irradiance standards, based on different physical principles, showed agreement to within their combined standard uncertainties as assigned to them by NIST. The wavelength region of the spectral irradiance comparison was from 210 nm to 300 nm. The spectral irradiance sources were: an electron storage ring, 1000 W quartz-halogen lamps, deuterium arc lamps, and a windowless argon miniarc.

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Comparison of the NIST SURF and argon miniarc irradiance standards at 214 nm

Abstract: Comparison of NIST's SURF-II primary irradiance standard and argon miniarc irradiance standard at 214 nm with an uncertainty of ~3% shows that at this wavelength these irradiance standards agree to within the uncertainties of 1.3 and 7%, respectively, assigned to them by NIST.

Cited by 11 publications

References 6 publications

The 1997 North American Interagency Intercomparison of Ultraviolet Spectroradiometers Including Narrowband Filter Radiometers

The 1997 North American Interagency Intercomparison of Ultraviolet Spectroradiometers Including Narrowband Filter Radiometers

The Solar Ultraviolet Spectral Irradiance Monitor (SUSIM) experiment on board the Upper Atmosphere Research Satellite (UARS)

Ultraviolet Spectral Irradiance Scale comparison: 210 nm to 300 nm

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