1. DNB Terrain Correction Slide 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 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, 0933Z M13 – 3.9mm
Slide

5. 23 May2014, 0933Z M10 – 1.6mm

6. 23 May2014, 0933Z DNB – NonTC

7. 23 May2014, 0933Z DNB –Terrain Corrected

8. 23 May2014, 0933Z DNB non-TC, M10, M13

9. 23 May2014, 0933Z DNB_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.