MODIS Band 31
a
b
c
d
MODIS Band 31
MODIS Band 32
MODIS Band 32
Bias=-0.0535K, Stdev= 0.5461K
Bias=-0.0039K, Stdev= 0.6031K
60
Bias=-0.0039K, Stdev= 0.6031K
Bias=-0.0535K, Stdev= 0.5461K
340
340
-5 -4.5 -4 -3.5 -3 -2.5 -2 -1.5 -1 -0.5
BT Difference (K)
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
-5 -4.5 -4 -3.5 -3 -2.5 -2 -1.5 -1 -0.5
BT Difference (K)
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
320
320
300
300
280
280
260
260
Aggregated MODIS BT(K)
Aggregated MODIS BT(K)
simulated MODIS BT(K)
240
240
220
220
200
200
180
340
320
300
280
260
simulated MODIS BT(K)
240
220
200
180
180
340
320
300
280
260
240
220
200
180
50
40
30
20
Percentage of Pixels
Percentage of Pixels
10
0
70
60
50
40
30
20
10
0
Fig. 5.5 Comparison of AIRS-simulated MODIS and aggregated MODIS at AIRS footprints.
(a) Brightness temperature of MODIS band 31; (b) histogram of band 31 brightness temperature
difference between AIRS-simulated MODIS and aggregated MODIS; (c) brightness temperature
of MODIS band 32; (d) histogram of band 32 brightness temperature difference between AIRSsimulated MODIS and aggregated MODIS
Table 5.1 Difference of
brightness temperature
between simulated MODIS
and aggregated MODIS
Band
<1 K (%)
<0.5 K (%)
<0.25 K (%)
Band 31
93.01
80.57
59.66
Band 32
94.12
82.51
62.15
Table 5.2 Relative
difference of brightness
temperature between
simulated MODIS and
aggregated MODIS
Band
<1%
<0.5%
<0.2%
Band 31
99.15%
95.70%
81.57%
Band 32
99.36%
96.42%
83.18%
5 Development of the Global Multispectral Imager Thermal Emissive FCDRs
75