1. Finding Night time aerosol optical depth using standard photometric stars from images captured at the Great Basin Observatory
Megan Rennie

2. Result So Far
𝑰= 𝑰 𝟎 𝒆 𝝉 𝒎 𝝉 𝒂𝒃𝒔 = 𝝉 𝑹𝒂𝒚𝒍𝒆𝒊𝒈𝒉 𝒂𝒊𝒓 + 𝝉 𝒂𝒃𝒔 𝒂𝒊𝒓 (𝝀)+ 𝝉 𝒂𝒃𝒔 𝒂𝒆𝒓𝒐𝒔𝒐𝒍 + 𝝉 𝒔𝒄𝒂𝒕 𝒂𝒓𝒆𝒐𝒔𝒐𝒍
MFRSR did not agree with the AOD found from my data taken on the roof.
My data has too many sharp lines so I am going to retake measurements with spectrometer.
Gueymard SMARTS 295 model aligns with my numbers if it has an air mass of 1 and an AOD of 0.3, pressure set to 861mb.
It runs much smoother than my graph and it is possibly modeling the Rayleigh.
Using the spectral smoothing program shows the data I have for the oxygen A band is off.
Gueymard shows the 𝑂 2 peaks slightly to the left of my spectra spikes.
I am searching for more detailed 𝑂 2 cross-sections
I have collected the raw star counts using AstroImageJ
Some counts are low so I am going to work more on those images to make sure that it is correct.
When the GBO’s spectrometer is ready to use I will collect more images from it

6. Rayleigh Scattering Equation
𝜏 𝑅 =𝜎 𝑃𝐴 𝑚 𝑎 𝑔
Bodhaine 1999