1. High Park Fire, Colorado 6/10 – 6/12/2012 Curtis Seaman, CIRA
Saturation in I-04
High Park Fire, Colorado
6/10 – 6/12/2012
Curtis Seaman, CIRA

2. I-04 (3.7 mm) 20:18 UTC 2012/6/9 Max T: 367 K Min T: 208 K Saturday
afternoon
Color scale: white = cold, black = hot

3. M-12 (3.7 mm) 20:18 UTC 2012/6/9 Max T: 368 K Min T: 203 K Saturday
afternoon
Color scale: white = cold, black = hot

4. M-13 (4.0 mm) 20:18 UTC 2012/6/9 Max T: 471 K Min T: 262 K Saturday
afternoon
Color scale: white = cold, black = hot

5. I-04 (3.7 mm) 08:36 UTC 2012/6/10 Max T: 367 K Min T: 208 K Sunday
morning
Color scale: white = cold, black = hot

6. M-12 (4.0 mm) 08:36 UTC 2012/6/10 Max T: 368 K Min T: 237 K Sunday
morning
Color scale: white = cold, black = hot

7. M-13 (4.0 mm) 08:36 UTC 2012/6/10 Max T: 519 K Min T: 226 K Sunday
morning
Color scale: white = cold, black = hot

8. I-04 (3.7 mm) 19:59 UTC 2012/6/10 Max T: 367 K Min T: 208 K Sunday
afternoon
Color scale: white = cold, black = hot

9. M-12 (3.7 mm) 19:59 UTC 2012/6/10 Max T: 368 K Min T: 288 K Sunday
afternoon
Color scale: white = cold, black = hot

10. M-13 (4.0 mm) 19:59 UTC 2012/6/10 Max T: 570 K Min T: 282 K Sunday
afternoon
Color scale: white = cold, black = hot

11. I-04 (3.7 mm) 08:17 2012/6/11 Max T: 367 K Min T: 242 K Monday morning
Color scale: white = cold, black = hot

12. M-12 (3.7 mm) 08:17 2012/6/11 Max T: 368 K Min T: 244 K Monday morning
Color scale: white = cold, black = hot

13. M-13 (4.0 mm) 08:17 2012/6/11 Max T: 373 K Min T: 192 K Monday morning
Color scale: white = cold, black = hot

14. I-04 (3.7 mm) 19:40 2012/6/11 Max T: 367 K Min T: 208 K Monday
afternoon
Color scale: white = cold, black = hot

15. M-12 (3.7 mm) 19:40 2012/6/11 Max T: 368 K Min T: 286 K Monday
afternoon
Color scale: white = cold, black = hot

16. M-13 (4.0 mm) 19:40 2012/6/11 Max T: 422 K Min T: 272 K Monday
afternoon
Color scale: white = cold, black = hot

17. I-04 (3.7 mm) 07:58 2012/6/12 Max T: 324 K Min T: 237 K Tuesday
morning
Color scale: white = cold, black = hot

18. M-12 (3.7 mm) 07:58 2012/6/12 Max T: 305 K Min T: 240 K Tuesday
morning
Color scale: white = cold, black = hot

19. M-13 (4.0 mm) 07:58 2012/6/12 Max T: 291 K Min T: 211 K Tuesday
morning
Color scale: white = cold, black = hot

20. Summary
As the fire quickly grew Saturday (6/9) and Sunday (6/10), the high resolution 3.7 mm band (I-04) saturated with significant fold-over
Peak (saturation) brightness temperature of 367 K
Fold-over pixels had a brightness temperature near 208 K
Moderate resolution 3.7 mm band (M-12) saturated at 368 K
also some fold-over, but not as pronounced as in I-04
The 4.0 mm band (M-13) had a peak temperature of 570 K on Sunday afternoon (6/10)
Pixels with fold-over in I-04 occurred where M-13 was above ~400 K
M-13 was much cooler than M-12 and I-04 on Tuesday morning (07:58 UTC 6/12), otherwise M-13 peaked at a much warmer temperature as it did not appear to saturate

21. Color scale: white = hot/reflective, black = cold/non-reflective
M-11 (2.25 mm) 20: /6/9
Radiance
Max:
38.16 W m-2 str-1 mm-1
Min:
0.073 W m-2 str-1 mm-1
Color scale: white = hot/reflective, black = cold/non-reflective

22. Color scale: white = hot/reflective, black = cold/non-reflective
M-11 (2.25 mm) 19: /6/10
Radiance
Max:
38.16 W m-2 str-1 mm-1
Min:
0.187 W m-2 str-1 mm-1
Color scale: white = hot/reflective, black = cold/non-reflective

23. Color scale: white = hot/reflective, black = cold/non-reflective
M-11 (2.25 mm) 19: /6/11
Radiance
Max:
23.10 W m-2 str-1 mm-1
Min:
0.132 W m-2 str-1 mm-1
Color scale: white = hot/reflective, black = cold/non-reflective

24. Summary (2)
The 2.25 mm band (M-11) is only available during daylight hours
M-11 saturated at W m-2 str-1 mm-1 (also reached maximum reflectance value of 1.6) both Saturday (6/9) and Sunday (6/10) afternoon
No fold-over in M-11
Fire much cooler/burning less brightly on Monday (6/11) .