MODIS Calibration: A Brief Review of the Strategy for the At-Launch Calibration Approach

Guenther, B.; Barnes, William; Knight, Edward J.; Barker, J. L.; Harnden, Joann M.; Weber, Richard; Roberto, M.; Godden, G.; Montgomery, Harry E.; Abel, Peter

doi:10.1175/1520-0426(1996)013<0274:mcabro>2.0.co;2

Cited by 68 publications

(35 citation statements)

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“…Among these calibration systems, solar diffusers maintain the color temperature and spectral fine structure of sunlight; however, they are susceptible to changes in their reflectance properties from exposure to the near-Earth space environment or from contamination. Serious efforts to understand and minimize the effects of these changes to in-flight sensor calibration have been made for several recent instruments (see, e.g., Bruegge et al 1996;Guenther et al 1996;Folkman et al 2001;Alhajjah et al 2004).…”

Section: Introduction: Purpose and Usementioning

confidence: 99%

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The Spectral Irradiance of the Moon

2005

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Images of the Moon at 32 wavelengths from 350 to 2450 nm have been obtained from a dedicated observatory during the bright half of each month over a period of several years. The ultimate goal is to develop a spectral radiance model of the Moon with an angular resolution and radiometric accuracy appropriate for calibration of Earth-orbiting spacecraft. An empirical model of irradiance has been developed that treats phase and libration explicitly, with absolute scale founded on the spectra of the star Vega and returned Apollo samples. A selected set of 190 standard stars are observed regularly to provide nightly extinction correction and long-term calibration of the observations. The extinction model is wavelength-coupled and based on the absorption coefficients of a number of gases and aerosols. The empirical irradiance model has the same form at each wavelength, with 18 coefficients, eight of which are constant across wavelength, for a total of 328 coefficients. Over 1000 lunar observations are fitted at each wavelength; the average residual is less than 1%. The irradiance model is actively being used in lunar calibration of several spacecraft instruments and can track sensor response changes at the 0.1% level.

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Section: Introduction: Purpose and Usementioning

confidence: 99%

“…Use of the Moon to address in-flight calibration was suggested nearly 20 years ago (Kieffer & Wildey 1985, 1996Pugacheva et al 1993), and a NASA-sponsored project to accurately determine the irradiance and radiance of the Moon began routine operations in 1996 (Kieffer & Anderson 1998;.…”

Section: Introduction: Purpose and Usementioning

confidence: 99%

The Spectral Irradiance of the Moon

2005

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“…are varied over the range of values expected during flight. There are numerous examples in the literature [61,63,77].…”

Section: The Spectral Characterization Of Thermal Infared Remote Sensmentioning

confidence: 99%

10. The Calibration and Characterization of Earth Remote Sensing and Environmental Monitoring Instruments

Butler

Johnson

Barnes

2005

Experimental Methods in the Physical Sciences

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“…Three prominent and long-duration Earth-imaging NASA instruments, the Moderate Resolution Imaging Spectroradiometer (MODIS), the Sea-viewing Wide Field-of-View Sensor (SeaWiFS), and the Advanced Very High Resolution Radiometer (AVHRR), have radiometric accuracies for their reflective solar bands of ∼ 2 % (see Guenther et al, 1996;Xiong et al, 2005a, b, c, on MODIS andHolmes, 1993;Barnes and Zalewski, 2003, on SeaWiFS) and only cover discrete spectral bands. The National Polar-orbiting Operational Environmental Satellite System (NPOESS) National Polar-orbiting Partnership's Visible Infrared Imaging Radiometer Suite (VIIRS) has similar discrete-band coverage as MODIS, with slightly better radiometric accuracies of 1.2 to 1.6 % (Xiong et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Radiometric flight results from the HyperSpectral Imager for Climate Science (HySICS)

Kopp

Smith

Belting

et al. 2017

Geosci. Instrum. Method. Data Syst.

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Abstract. Long-term monitoring of the Earth-reflected solar spectrum is necessary for discerning and attributing changes in climate. High radiometric accuracy enables such monitoring over decadal timescales with non-overlapping instruments, and high precision enables trend detection on shorter timescales. The HyperSpectral Imager for Climate Science (HySICS) is a visible and near-infrared spatial/spectral imaging spectrometer intended to ultimately achieve ∼ 0.2 % radiometric accuracies of Earth scenes from space, providing an order-of-magnitude improvement over existing spacebased imagers. On-orbit calibrations from measurements of spectral solar irradiances acquired by direct views of the Sun enable radiometric calibrations with superior long-term stability than is currently possible with any manmade spaceflight light source or detector. Solar and lunar observations enable in-flight focal-plane array (FPA) flat-fielding and other instrument calibrations. The HySICS has demonstrated this solar cross-calibration technique for future spaceflight instrumentation via two high-altitude balloon flights. The second of these two flights acquired high-radiometricaccuracy measurements of the ground, clouds, the Earth's limb, and the Moon. Those results and the details of the uncertainty analyses of those flight data are described.

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MODIS Calibration: A Brief Review of the Strategy for the At-Launch Calibration Approach

Cited by 68 publications

References 0 publications

The Spectral Irradiance of the Moon

The Spectral Irradiance of the Moon

10. The Calibration and Characterization of Earth Remote Sensing and Environmental Monitoring Instruments

Radiometric flight results from the HyperSpectral Imager for Climate Science (HySICS)

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