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Saturation in I-04

Saturation in I-04. High Park Fire, Colorado 6/10 – 6/12/2012 Curtis Seaman, CIRA. I-04 (3.7 m m ) 20:18 UTC 2012/6/9. Max T: 367 K Min T: 208 K. Saturday afternoon. Color scale: white = cold, black = hot. M-12 (3.7 m m) 20:18 UTC 2012/6/9. Max T: 368 K Min T: 203 K. Saturday

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Saturation in I-04

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  1. 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. M-11 (2.25 mm) 20:18 2012/6/9 Radiance Max: 38.16 W m-2 str-1mm-1 Min: 0.073 W m-2 str-1mm-1 Color scale: white = hot/reflective, black = cold/non-reflective

  22. M-11 (2.25 mm) 19:59 2012/6/10 Radiance Max: 38.16 W m-2 str-1mm-1 Min: 0.187 W m-2 str-1mm-1 Color scale: white = hot/reflective, black = cold/non-reflective

  23. M-11 (2.25 mm) 19:40 2012/6/11 Radiance Max: 23.10 W m-2 str-1mm-1 Min: 0.132 W m-2 str-1mm-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 38.16 W m-2 str-1mm-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) • .

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