Development of the Global Multispectral Imager Thermal Emissive FCDRs - Satellite-based Applications on Climate Change - page 73

MODIS Band 31 MODIS Band 31

a b

340 60

Bias=-0.0039K, Stdev= 0.6031K

Bias=-0.0039K, Stdev= 0.6031K

320

50

300

40

280

260 30

240

20

220

10

200

180 0

180 200 220 260

Aggregated MODIS BT(K)

240 280 300 320 340 -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

MODIS Band 32 MODIS Band 32

c d

340 70

Bias=-0.0535K, Stdev= 0.5461K

Bias=-0.0535K, Stdev= 0.5461K

320

60

300

50

280

40

260

30

240

20

220

10

200

180 0

180 200 220 240 260 280 300 320 340 -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

Aggregated MODIS BT(K)

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 AIRS-
simulated 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%