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DNB Terrain Correction Slide Fire, AZ

DNB Terrain Correction Slide Fire, AZ. William Straka III. 1. Background. IDPS Mx8.4 was implemented on 22 May, 2014 starting with the ~14:40 GMT observation time . One of the key features is Terrain Correction is implemented for the Day Night Band

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DNB Terrain Correction Slide Fire, AZ

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  1. DNB Terrain CorrectionSlide Fire, AZ William Straka III 1

  2. Background • IDPS Mx8.4 was implemented on 22 May, 2014 starting with the ~14:40 GMT observation time. • One of the key features is Terrain Correction is implemented for the Day Night Band • The TC latitude/longitudes are variables in the GDNBO files and not a separate file. • This means thermal, NIR and DNB emissive sources should now match up in all regions • NDE provided test case over Iceland as so users could adjust their scripts/code accordingly. We wish to acknowledge their help in this • The nightly McIDAS-V was ready as soon as the TC navigation was available within the GDNBO files

  3. Test case • Test case is the Slide Fire in Arizona • Night time case from 0933Z on 23 May 2014 was used • Arrow is located at roughly the center of the hot spot from the M13 band (terrain corrected) and in the same place for all images • Slides 8-9 have animations, so use slide show

  4. 23 May2014, 0933ZM13 – 3.9mm Slide

  5. 23 May2014, 0933ZM10 – 1.6mm

  6. 23 May2014, 0933ZDNB – NonTC

  7. 23 May2014, 0933ZDNB –Terrain Corrected

  8. 23 May2014, 0933ZDNB non-TC, M10, M13

  9. 23 May2014, 0933ZDNB_TC, M10, M13

  10. Observations • While test scene is cloud covered, the location of Slide Fire is clearly shifted from the M10 and M13, both which are terrain corrected, hot spots • The terrain corrected DNB geolocation shifts the fire inline with the hot spots indicated in the M10 and M13 band data

  11. Conclusions • While test case was clouded over, it appears that the Terrain Corrected navigation correctly shifts fires in-line with thermal observations. • Because it likely the Slide Fire will be burning for a few more days, hopefully it will be cloud free for better comparisons • McIDAS-V 1.5 beta appears to correctly use the terrain corrected navigation, if it is available. In addition it is backward compatible to data without the TC navigation.

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