Collins weather radar question
Hello
Can somebody explain this extract from Collins weather radar Manual (page 3-7)
UPDATE RATES
The total time required to complete one cycle of the MultiScan process
in all modes except windshear is 8 seconds. When in windshear mode,
the total cycle time for both MultiScan and windshear is 11.2 seconds.
Thus, there is no significant change to observed weather during one
cycle of the MultiScan process. What does change is the relationship
of the aircraft to the weather. To compensate for this, MultiScan
translates(figure 3-8) androtates(figure 3-9) the stored digital image
to compensate for aircraft movement.
The result is that the Collins MultiScan updates all radar displays every
four seconds in all modes except windshear, in which case the displays
update every 5.5 seconds. One interesting element of this process is
that the antenna scan is no longer tied to the display sweep. This frees
the antenna to perform multiple functions without interrupting the pilot’s
weather presentation
My question: The paragraph says the total time required to complete one cycle is 8 seconds, what is one cycle, is it the sweep the radar antenna does from right to left ?
The second paragraph says the result is that multi scan updates all radar displays every four seconds. Why does it say 4 seconds now, I thought the 1st paragraph said 8 seconds
What does it mean when it says "One interesting element of this process is
that the antenna scan is no longer tied to the display sweep. This frees
the antenna to perform multiple functions without interrupting the pilot’s
weather presentation" ??
Can somebody please take some time out to answer my question and also please explain what are these 2 paragraphs talking about
Thanks in advance