Satellite Remote Sensing of Evaporation over Sea
280
85v
---...
--------------------------------260
240
-----------------------220
g
------------------------------~ 200 ____________ -------------180
160
140
o
4
8
12
16
u [m/s]
85h
----37v
... --... --... ---20
24
--- --19v
--- --37h
28
451
Figure 16.8: Simulated variation of brightness temperatures with wind speed for a mid-latitude
summer situation with clear sky.
Tl9h < 165 K and (T37v - T 37h ) > 55 K
Co I Cl I C2 I C3 I C4 I C5 I Error
149.0 I 0.8800 I -0.4887 I -0.4642 I -0.7131 I -0.4668 I 1.4
165 K < Tl9h < 190 K and 55 K < (T37v - T 37h ) > 20 K
Co I Cl
I C2 I C3 I C4 I C5 I Error
205.6 I -0.08349 I 0.07933 I 0.1066 I -0.7346 I -0.9132 I 1.6
Input: brightness temperatures in K
Output: wind speed in mls
Table 16.7: Coefficients and errors for retrieval model (16.28).
until a final solution is found. An optimum method for such a solution, the minimum variance
method, has been described by Rodgers (1976).