Investor Presentaiton
FIG WORKING WEEK 2017
29 may-2 June
Helsinki Finland
The main formula for calculating LST is,
LST CALCULATION
LST = TB10+ C1 (TB10-TB11) + C2 (TB10-TB11)² + CO + (C3+C4W) (1-ε) +
(C5+C6W) A &
Where:
⚫LST - Land Surface Temperature (K), W is values of atmospheric vapour content
•CO to C6 - Split-Window Coefficient values (table; Skokovic et al, 2014 vide Rajeshwari, 2014)
•TB10 and TB11 - brightness temperature of band 10 and band 11 (K)
⚫TB10 and TB11 can be calculated as TB = K2/Ln ((K1/ Lλ) +1)
Where:
•
•
K1 and K2 are thermal conversion constant and it varies for both TIR bands (table Skokovic)
LA are Top of Atmospheric spectral radiance (m2*srad* μm). LA can be calculated as Lλ = ML*Qcal + AL
Where:
•
ML - Band specific multiplicative rescaling factor (radiance_mult_band_10/11) = 0.000342
.
Qcal value of band 10/11 image.
•
AL - Band specific additive rescaling factor (radiance_add_band_10/11) = 0.1
•ε - mean LSE of TIR bands. ε can be calculated as ε = (ε10 + ε11)/2NDVIV
•A & Difference in LSE. A ε can be calculated as Aε = ε10- ε11
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•Where ε is LSE from band 10 and band 11 with formul ε = εs (1-FVC) + εv
Where:
*
FVC
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FVC is Fractional Vegetation Cover. For every band
•
FVC (NDVI NDVIS) /(NDVIv - NDVIS)
NDVI =
= ([B5]-[B2])/([B5]+[B2]), taken from raw data Landsat table
✓ NDVIS = ([B5]-[B4])/([B5]+[B4]), as above
✓ NDVIV = ([B5]-[B3])/([B5]+[B3]), as aboveView entire presentation