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Spectroscopy of Earth’s Atmosphere and Solar Radiation in the Spectral Range of 400 nm to 1000 nm

Spectroscopy of Earth’s Atmosphere and Solar Radiation in the Spectral Range of 400 nm to 1000 nm. Stephanie Inabnet Edmond Wilson Harding University. Project Goals. To determine what information can be learned from measuring sunlight through Earth’s atmosphere We will be focusing mainly on

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Spectroscopy of Earth’s Atmosphere and Solar Radiation in the Spectral Range of 400 nm to 1000 nm

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  1. Spectroscopy of Earth’s Atmosphere and Solar Radiation in the Spectral Range of 400 nm to 1000 nm Stephanie Inabnet Edmond Wilson Harding University

  2. Project Goals • To determine what information can be learned from measuring sunlight through Earth’s atmosphere • We will be focusing mainly on • Identifying peaks in the Solar spectrum • Identifying components of Earth’s atmosphere • Measuring the atmospheric water vapor in Earth’s atmosphere over a period of time to determine what short and long range variations occur.

  3. Project Objectives • Develop an understanding of the distribution of atmospheric water vapor and some of the methods used for its measurement; • Learn to use the HITRAN 2008 Molecular Spectroscopic Database and other tools to model water vapor and other molecular spectra under various conditions • Design and build a Visible/Near Infrared spectrometer or spectrograph to measure atmospheric water vapor using the Sun as the spectral source in the 600 -1000 nm wavelength range; • Calibrate our instrument for both wavelength and intensity measurements; • Carry out measurements of atmospheric water vapor in Searcy, Arkansas over an extended period of time; • Interpret the data collected to produce a comprehensive report of our findings; • Identify and carry out outreach activities to educate the public and generate excitement about our research; • Travel to Bozeman, Montana in May 2014 to participate fully in the National Student Solar Spectrograph Competition (NSSSC).

  4. Other Gases in Earth’s Atmosphere • O3 • Hydroxyl Radical • N2O • CH4 • CO2 • BrO

  5. Expected Significance • Our spectrograph instrument will contribute additional knowledge about PWV and other gases that absorb solar radiation in the wavelength ranges measured. • It will help find answers to the following science questions about Earth’s atmosphere: • What is the diurnal variation in precipitable water vapor (PWV) in our geographical location? • What is the weekly variation in PWV in our location? • What is the best model to use to determine PWV using the data that we collect? • After the NSSSC meeting in Bozeman, MT, the instrument will become part of a new solar studies laboratory at Harding University that will continuously monitor Solar radiation and its interactions with Earth’s atmosphere.

  6. Acknowledgements • Arkansas Space Grant Consortium • Montana Space Grant Consortium • Richardson Grating Laboratories

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