set orogram (2)
program (1)
Signal-to-noise ratio Os /
0,10
average increase
of rate of multiple
————_ Drogram X
nrogram (1)
2,/0,
signal-to-noise ratio do; /g,
average vercentage (%)
of compensation
From above conclusions can be drawn as follows:
(1) While signal-to-noise ratio >1, through a posteriori
compensation, a significant accuracy increase can be obtained
able, while signal-to-noise ratio <1, under many circumstances,
4 certain amount of increase in accuracy can also be gained.
(2) After a posteriori compensation, accuracy increase of
rate of multiple tends to be larger when signal-to-noise ratio
is larger, that is to say, if one wants to gain better results,
it is necessary to reduce the noise and raise signal-to-noise
ratio. |
(3) The efficiency on elemination of systematic errors by
using a posteriori compensation also tends to be higher along
with the increase of signal-to-noise ratio, but such efficiency
could not be increased proportionally. From Fige.5 it can be
seen that when signal-to-noise ratio is about 3, systematic
error can be eleminated by 80% or so, if the increase of
signal-to-noise ratio can be done once more, efficiency for
elemination of systematic errors increases only a little higher.
(4) Under normal conditions, 60-70% systematic errors can be
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