| the correction of reflection is linear for water within the used temperature in- 
| terval (see fig.3). 
  
  
  
The differences in the variances can be regarded as significant. This was con- BUE 
trolled with a statistical F-test for a 95 %-confidence level. The effect of SRF 
and atmospheric correction is demonstrated in Fig.14, the difference image of 
filtered, corrected and original data. EHL 
The used procedure for filtering can also be applied to other surfaces than water 
changing only the linear approximation. Especially for water this filter technique 
is very useful because of the low signal-to-noise ratio compared to land surfaces. KOL 
KON 
KOR 
LOK 
LOF 
LOF 
McC 
Fig. 14: Difference Original/Result- Fig. 15: Magnitude of atmospheric SFE 
image correction 
; ; SFE 
Table 1: Temperature Accuracies 
original, after labora- after labora- after laboratory 
data tory calibra- | tory calibration| calibration, SRF 
tion and atmospheric | and atmospheric 
correction correction 
systematic 
error fai [ex] 2.37 1.00 0.20 0.11 
  
standard deviation 
Jd fo 0.36 0.54 0.24 0.10 
gei. iod 
  
  
  
  
  
142