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DNB Terrain Correction Slide Fire, AZ Part 2

DNB Terrain Correction Slide Fire, AZ Part 2. 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 Part 2

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  1. DNB Terrain CorrectionSlide Fire, AZPart 2 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 before (21 May 2014) the TC navigation was available within the GDNBO files.

  3. Test case • Test case is the Slide Fire in Arizona • Cases from 24-26 May are shown • 24 May 2014 is near nadir, others progress to the left of the scan • Arrow is located at roughly an edge in the theM13 band (terrain corrected) and in the same place for allimages for a given time stamp • Some slides have animations, so use slide show

  4. 24 May 2014, 0914ZM13 – 3.9mm Slide

  5. 24 May 2014, 0914ZM10 – 1.6mm

  6. 24 May 2014, 0914ZDNB – NonTC

  7. 24 May 2014, 0914ZDNB –Terrain Corrected

  8. 24 May 2014, 0914ZDNB non-TC, M10, M13

  9. 24 May 2014, 0914ZDNB_TC, M10, M13

  10. 25 May 2014, 0855ZM13 – 3.9mm Slide

  11. 25 May 2014, 0855ZM10 – 1.6mm

  12. 24 May 2014, 0914ZDNB – NonTC

  13. 25 May 2014, 0855ZDNB –Terrain Corrected

  14. 25 May 2014, 0855ZDNB non-TC, M10, M13

  15. 25 May 2014, 0855ZDNB_TC, M10, M13

  16. 26 May 2014, 0835ZM13 – 3.9mm Slide

  17. 26 May 2014, 0835ZM10 – 1.6mm

  18. 26 May 2014, 0835ZDNB – NonTC

  19. 26 May 2014, 0835ZDNB –Terrain Corrected

  20. 26 May 2014, 0835ZDNB non-TC, M10, M13

  21. 26 May 2014, 0835ZDNB_TC, M10, M13

  22. Observations • All three scenes are cloud free • As can be seen the non-terrain corrected geolocated DNB image of Slide Fire is clearly shifted from the M10 and M13, both which are terrain corrected, hot spots to varying degrees • The terrain corrected DNB geolocation shifts the fire inline with the hot spots indicated in the M10 and M13 band data

  23. Conclusions • These three cases show the amount of variation in the non-terrain corrected data, depending on what part of the scan the fire is located. • Largest shift is when it is on the edge of scane. • It appears that the Terrain Corrected navigation correctly shifts fires in-line with thermal observations. • Based on this, 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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