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AMSR-E/TMI COMPARISONS For X-CAL

AMSR-E/TMI COMPARISONS For X-CAL. Tom Wilheit Texas A&M Univ. DATA AMSR-E DATA FOR 7/2005 TO 6/2006 SUPPLIED BY KEIJI IMAOKA CONVERTED TO 1C FORMAT BY PPS@GSFC ADDED : BETA ANGLE SUN GLINT ANGLE TIME SINCE ECLIPSE ENTRY

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AMSR-E/TMI COMPARISONS For X-CAL

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  1. AMSR-E/TMI COMPARISONS For X-CAL Tom Wilheit Texas A&M Univ.

  2. DATA AMSR-E DATA FOR 7/2005 TO 6/2006 SUPPLIED BY KEIJI IMAOKA CONVERTED TO 1C FORMAT BY PPS@GSFC ADDED : BETA ANGLE SUN GLINT ANGLE TIME SINCE ECLIPSE ENTRY MATCHUP DATA SET PROVIDED BY UNIV. CENTRAL FLORIDA (L. JONES GROUP) TBs & ss FOR 1 ° BOXES COINCIDENCES WITHIN 1 HOUR INCLUDES AVERAGE BEAM POSITION GDAS DATA INTERPOLATED TO GRID LOCATION/TIME KEEP THE ONES WITH ss < 2K(V POL) OR 3K(H POL) FIT SST, WS, CLW AND PW TO MATCH SOURCE TBs AS WELL AS POSSIBLE CALCULATE TARGET TBS AND DOUBLE DIFFERENCES

  3. X-CAL has developed a Consensus Calibration using TMI and Windsat 25% TMI 75% Windsat 10 -37 GHz only, 7 channels Applied to TMI as a Transfer Standard for Other Radiometers TMI_CC_1.1 10V 10H 19V 19H 21V 37V 37H 85V 85H 0.20 -1.23 -0.52 -2.23 -1.47 -2.42 -1.89 -4.5 -4.4 @ 168K 90 201 131 204 216 156 0 0 -0.57 -0.69 -0.90 -1.07 -2.53 -2.38 -2.37 -4.5 -4.4 @ 281 280 285 284 284 281 281 300 300 RED NUMBERS, 85 ADJUSTED FOR CONSISTENCY, TMI_CC_1.1.X

  4. AMSR-E DIFFERENCES FROM TMI CAL 10V 10H 18V 18H 23V 23H* 37V 37H 89V 89H 7CH -0.17K 1.78 -0.08 2.13 0.38 2.65 0.27 1.54 -0.06 0.59 9CH -0.12 1.78 -0.14 1.93 0.39 2.90 0.33 1.57 -0.08 0.59 CC1.1(7) 0.02 0.53 -0.43 0.14 -1.37 -0.55 -2.11 - 0.43 0.03 0.57 CC1.1(9) 0.12 0.53 -0.54 -0.18 -1.28 0.09 -2.02 -0.35 -0.07 0.58 CC1.1.X 0.03 0.53 -0.46 0.09 -1.38 -0.40 -2.10 -0.43 - 4.48 -3.86 @ 176 89 202 131 234 188 220 157 267 239K *23H Questionable since there is no corresponding TMI channel Using 7 or 9 Channels in the Fit Makes Little Difference Reasonable agreement with TMI_CC_1.1

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