1. 1 DNB Terrain Correction Slide Fire, AZ Part 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 the M13 band (terrain corrected) and in the same place for all images for a given time stamp Some slides have animations, so use slide show

4. 24 May 2014, 0914Z M13 – 3.9  m Slide

5. 24 May 2014, 0914Z M10 – 1.6  m

6. 24 May 2014, 0914Z DNB – NonTC

7. 24 May 2014, 0914Z DNB –Terrain Corrected

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

9. 24 May 2014, 0914Z DNB_TC, M10, M13

10. 25 May 2014, 0855Z M13 – 3.9  m Slide

11. 25 May 2014, 0855Z M10 – 1.6  m

12. 24 May 2014, 0914Z DNB – NonTC

13. 25 May 2014, 0855Z DNB –Terrain Corrected

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

15. 25 May 2014, 0855Z DNB_TC, M10, M13

16. 26 May 2014, 0835Z M13 – 3.9  m Slide

17. 26 May 2014, 0835Z M10 – 1.6  m

18. 26 May 2014, 0835Z DNB – NonTC

19. 26 May 2014, 0835Z DNB –Terrain Corrected

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

21. 26 May 2014, 0835Z DNB_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.