93 
$0 4 
is x :3Ocm 
*:40cm 
50 0 :55cm 
A:70cm 
GAIN2 48 
(dB) 
40 
38 
30 
  
  
  
26 
30 
  
DIP-ANG (Dagrees) 
Figure 2: X-Band Data with Fitted Response and Nominal Envelope 
5.4, Comments on the above Experiments 
The experiments described in the previous section did not 
achieve, or fully achieve, their calibration objectives. 
Valuable information was collected during these activities, 
contributing, if carefully analysed, to the characterisation of 
parts, or subsystems, of the end-to-end chain. 
The analysis of the corner reflectors in [2] and [17] 
characterises the processor performance, 
It is important to decide whether the above results 
constitute a "calibration" in the sense of Section 1. In 
general, the answer is "no" — at best, they allow comparison of 
some scenes where reference signals and/or targets are 
available. 
In both cases, to a different degree, the calibration has 
been an "a posteriori" exercise. In the CV580 experiment, where 
more precautions were taken, there was no stated objective in 
terms of the accuracy and precision of the derived og value.