Remote-Sensing Technologies and Data Processing Algorithms - New Ecoinformatics Tools in Environmental Science: Applications and Decision-making - page 193

Fig. 2.36 Resolver. Note
ʥ = multiplier,
ʣ = accumulator

Once dispersions have been determined, the commutator 2 blocks the input of
data from non-information channels. The data from information channels enter the
resolver 5. The signal at the multiplier

' s output corresponds to the value of one of

the parameters to be estimated.

2.11 Direct and Inverse Problems of Microwave
Monitoring

2.11.1 Typical Inverse Task of the Microwave Radiometry

An approach to the inverse problem of microwave monitoring is based on assuming
a linear functional correlation between radiobrightness contrasts and the charac-
teristics of the monitored object. The search of analytical relationships relating the
radiobrightness temperature of the environment to its thermodynamic and electro-
physical characteristics covers more general classes of the functional models. The
most general form of such dependence is as follows:

2
4

3
5 dh

T bi ¼ j i Z 1
0

Z

h

T ð h Þc i ð h Þ exp

c i ð x Þ dx ; ð 2 :

13 Þ

0

where T(h) is the thermodynamic pro le of the environment, T bi is the radiobrightness

temperature at the frequency ʽ i , ʳ i γi(h) is the pro le of the absorption coef cient of the

environment, ʺ i is the emissivity of the environment.