The Earth Radiation Budget Experiment Nonscanner Instrument

Luther, Michael R.; Cooper, John E.; Taylor, G. R.

doi:10.1029/rg024i002p00391

Cited by 49 publications

(25 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The field-of-view limiters and substrates of all channels have specular coatings. These surfaces are covered by a highly emissive black coating(a O.95) for the shortwave channels and a low emissive vacuum deposited aluminum coating(c O.O4) for the total channels [5]. The wide field-of-view (WFOV) channels view the entire Earth disk, while the medium field-of-view (MFOV) channels view the Earth with an Earth central angle of approximately 10 deg.…”

Section: Radiometer Description and Operationmentioning

confidence: 99%

See 1 more Smart Citation

<title>Numerical end-to-end model of the earth radiation budget experiment (ERBE): earth-viewing nonscanning radiometric channels</title>

et al. 1994

View full text Add to dashboard Cite

The Earth Radiation Budget Experiment consists ofan array ofradiometric instniments placed in Earth orbit by the National Aeronautics and Space Administration to monitor the longwave and shortwave components ofthe Earth's radiative budget. Presented is a high-level dyn amic electrothermal model ofthe nonscanrnng Earth-viewing active cavity radiometers used to measure the Earth's total radiative exitance. High accuracy is obtained by integrating an optical and thermal radiative model with both a transient conduction model of the Suprasil® filter dome and a dynamic electrothermal model of the active cavity. The instrument optical and thermal radiative perfonnance is characterized by a Monte-Carlo ray-trace representation. Thermal diffusion in the Suprasil® filter dome is modeled by a three-dimensional transient finite difference analysis. Dynamic electrothermal behavior ofthe active cavity is described by a twodimensional transient finite element model. The paper emphasizes the capabilities ofthe current models, including the ability to perform simulated calibration runs and to simulate the so-called solar blip" phenomenon.

show abstract

Section: Radiometer Description and Operationmentioning

confidence: 99%

“…The interiors ofboth cavities are coated with Chemglaze® Z302, a highly specular and highly emissive (a 0.9) black paint [5]. The highly absorptive black coating and the conical shape ofthe cavities assure a spectrally flat response over the 0.2 to 50 tm range.…”

Section: Radiometer Description and Operationmentioning

confidence: 99%

<title>Numerical end-to-end model of the earth radiation budget experiment (ERBE): earth-viewing nonscanning radiometric channels</title>

et al. 1994

View full text Add to dashboard Cite

show abstract

“…17 Lee et al (2003) 18 summarized the 2000-2003 calibration results. Lee et al 7 described the solar monitor's optical and physical properties, while Luther et al 15,16 described the optical and physical properties of the ERBE TWFOV, SWFOV, TMFOV, and SMFOV ACR's.…”

Section: Erbe Active Cavity Radiometer (Acr) Instrument Packagementioning

confidence: 99%

“…The ERBS, NOAA-9, and NOAA-10 spacecraft were launched October 5, 1984, December 12, 1984, and September 17, 1986, respectively. Each spacecraft carried both a scanning 14 radiometric instrument package, and a separate nonscanning 15,16 ACR radiometric instrument package. Only on the ERBS spacecraft is the nonscanning ACR package still operating nominally.…”

Section: Erbe Solar Monitor 7 and Active Cavity Radiometersmentioning

confidence: 99%

Validation of spacecraft active cavity radiometer total solar irradiance (TSI): long-term measurement trends using proxy TSI least squares analyses

Lee

Wilson

2004

SPIE Proceedings

View full text Add to dashboard Cite

Long-term, incoming total solar irradiance (TSI) measurement trends were validated using proxy TSI values, derived from indices of solar magnetic activity. Spacecraft active cavity radiometers (ACR) are being used to measure longterm TSI variability, which may trigger global climate changes. The TSI, typically referred to as the "solar constant," was normalized to the mean earth-sun distance. Studies of spacecraft TSI data sets confirmed the existence of a 0.1 %, long-term TSI variability component within a 10-year period. The 0.1 % TSI variability component is clearly present in the spacecraft data sets from the 1984-2004 time frame. Typically, three overlapping spacecraft data sets were used to validate long-term TSI variability trends. However, during the years of 1978-1984, 1989-1991, and 1993-1996, three overlapping spacecraft data sets were not available in order to validate TSI trends. The TSI was found to vary with indices of solar magnetic activity associated with recent 10-year sunspot cycles. Proxy TSI values were derived from least squares analyses of the measured TSI variability with the solar indices of 10.7-cm solar fluxes, and with limbdarked sunspot fluxes. The resulting proxy TSI values were compared to the spacecraft ACR measurements of TSI variability to detect ACR instrument degradation, which may be interpreted as TSI variability. Analyses of ACR measurements and TSI proxies are presented primarily for the 1984-2004, Earth Radiation Budget Experiment (ERBE) ACR solar monitor data set. Differences in proxy and spacecraft measurement data sets suggest the existence of another TSI variability component with an amplitude greater than or equal to 0.5 Wm-2 (0.04%), and with a cycle of 20 years or more.

show abstract

“…(Luther et al 1986) onboard NASA's Earth Radiation Budget Satellite and two NOAA satellites (NOAA-9 and NOAA-10) under the ERBE mission (Barkstrom et al 1986). These WFOV nonscanner instruments operated in a nadir mode with a horizon-to-horizon view to cover the Earth disk visible from satellite altitude.…”

Section: Spectral Unfiltering Of Erbe Wfov Nonscanner Shortwave Obsermentioning

confidence: 99%

Spectral unfiltering of ERBE WFOV nonscanner shortwave observations and revisiting its radiation dataset from 1985 to 1998

Shrestha¹,

Kato²,

Wong³

et al. 2017

AIP Conference Proceedings

View full text Add to dashboard Cite

Abstract. Wide-field-of-view (WFOV) nonscanner instruments were onboard NASA's Earth Radiation Budget Satellite (ERBS) and the NOAA-9 and NOAA-10 satellites, and provided broadband shortwave (SW) and longwave (LW) irradiances from 1984 to 1999. However, Lee et al. (2002) noted degradation in the WFOV SW dome transmissivity. To account for this degradation, these SW instruments were calibrated with the spectrally flat gray assumption. More recently, Loeb et al. (2012) showed higher degradation in the transmissivity of shorter wavelengths suggesting a need for both temporal and spectral dependent corrections for better calibration. Such an approach may also eliminate an additional adjustment that was applied to irradiances in the existing products to remove the observed trend of day-minusnight longwave irradiances (Wong et al. 2006). We plan to reprocess the ERBE WFOV nonscanner record by characterizing the spectral degradation of the SW dome transmissivity over time. Solar data observed by the WFOV SW nonscanner during calibration days are used to estimate a time and spectral dependent spectral response function (SRF). Coefficients derived from this SRF are then used to improve the irradiance estimate. In addition, since the spectrum of reflected irradiance depends on scene type, ISCCP-derived cloud properties and surface type are used. Preliminary results indicate that taking account of spectral degradation reduces the observed day-minus-night longwave irradiance trends in the tropics (20ON and 20OS) by ~34%, while almost all of the trend is removed in the region between 60ON and 60OS. This presentation explains the reprocessing approach and compares the existing and reprocessed ERBE dataset. Once ERBS measurements are calibrated against CERES instruments, this work allows for the generation of a long-term radiation datasets consistent with those provided by CERES.

show abstract

The Earth Radiation Budget Experiment Nonscanner Instrument

Cited by 49 publications

References 8 publications

<title>Numerical end-to-end model of the earth radiation budget experiment (ERBE): earth-viewing nonscanning radiometric channels</title>

<title>Numerical end-to-end model of the earth radiation budget experiment (ERBE): earth-viewing nonscanning radiometric channels</title>

Validation of spacecraft active cavity radiometer total solar irradiance (TSI): long-term measurement trends using proxy TSI least squares analyses

Spectral unfiltering of ERBE WFOV nonscanner shortwave observations and revisiting its radiation dataset from 1985 to 1998

Contact Info

Product

Resources

About