Application Of The Langley Plot For Calibration Of Sun Sensors For The Halogen Occultation Experiment (Haloe)

Moore, Alvah S.; Mauldin, L.; Reagan, John A.; Stump, Charles; Fabert, Milton G.

doi:10.1117/12.7976927

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…There are many calibration methods including Lamp calibration, transfer calibration, Langley-plot calibration and modified Langley calibration in the literatures [4] [5]. The Langley method is used by many researchers to calibration their instruments [6] [7]. Unfortunately the measurement location and atmospheric condition, which satisfies that atmospheric optical extinction components remain stable throughout the calibration measurement period of one to several hours, are very importance for the success of the method [8].…”

Section: Introductionmentioning

confidence: 98%

The calibration of Microtops II sun photometers over ocean

Hao

Wang

Pan

et al. 2010

Remote Sensing of the Atmosphere and Clouds III

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Aerosol plays important on the climate and environment. Aerosol parameter, such as optical thickness, is usually measured by the 5-channel hand-held MICROTOPS II sun photometer and the calibration coefficients of instruments measurements play a vital role in determining the accuracy of the aerosol optical thickness. However, long time usage and some clean operation of the MICROTOPS II sun photometer maybe make the sensitivity decline or lead some system excursion. It needs to update calibration constants annually to obtain some precise aerosol optical thickness. It is fussy that the general method use Langley-plot technique in clear and stable atmosphere condition or standard lamp in laboratory. According to marine atmosphere status and measurement conditions, the measurement under relative stable atmosphere condition on Dec 6, 7 2008 is selected as calibration experiment. By analyzing the aerosol optical thickness measured by the instrument with factory calibration constants, it is certain that the variety of atmosphere is stable or the variety of atmosphere optical thickness is slowly linear decreasing or increasing by the reorganization of measurements. The three continuous measurements are set as a group. Using similar Langley plot method with those groups, a new method to calibrating the 5-channel MICROTOPS II sun photometer which is named as SIO maritime measurement calibration method is presented. The calibration coefficients at five wavelengths is obtained by the new method and compared with the factory calibration and Langley plot method. It shows that the proposed calibration way can be conduct handily in the common atmospheric environment and maritime observation. It can provide good aerosol optical thickness at each measurement using this way.

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Section: Introductionmentioning

confidence: 98%

The calibration of Microtops II sun photometers over ocean

Hao

Wang

Pan

et al. 2010

Remote Sensing of the Atmosphere and Clouds III

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“…Over the past decade, the Atmospheric Remote Sensing Laboratory (ARSL) at The University of Arizona has built a number of portable and manually operated solar radiometers that have been used in a variety of atmospheric correction and spectral transmittance measurement applications (e.g., Bruegge et al 1992;Moore et al 1989;Reagan et al 1987a;Slater et al 1987;Teillet et al 1990). These radiometers consist of a filter wheel placed between a silicon detector and telescope.…”

Section: Introductionmentioning

confidence: 99%

Design and Performance Analysis of an Automated 10-Channel Solar Radiometer Instrument

Ehsani¹,

Reagan²,

Erxleben³

1998

J. Atmos. Oceanic Technol.

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An automated multichannel solar radiometer has been designed and fabricated by the Atmospheric Remote Sensing Laboratory at The University of Arizona. The automated radiometer has 10 separate silicon-photodiodebased channels that allow near-simultaneous solar spectral measurements through narrow bandpass filters (approximately 10 nm) from the visible to near-IR regions. The photodiode detectors are temperature stabilized using a heating temperature controller circuit. The instrument is pointed toward the sun via an autotracking system that actively tracks the sun with a Ϯ0.05Њ tracking accuracy. The instrument can continuously collect data for about 22 h at once per minute sample rate. This paper presents instrument design features as well as some performance and experimental results for the automated solar radiometer.

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Application Of The Langley Plot For Calibration Of Sun Sensors For The Halogen Occultation Experiment (Haloe)

Cited by 2 publications

References 2 publications

The calibration of Microtops II sun photometers over ocean

The calibration of Microtops II sun photometers over ocean

Design and Performance Analysis of an Automated 10-Channel Solar Radiometer Instrument

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