Vaisala RVP900 - Measured Quantities; Table 43 Algebraic Quantities Within the RVP900 Processor

 =   = arctan
 
Re  
where this angle lies between - π and + π and the signs of Real{} and Imag{} determine
the proper quadrant. Note that this angle is real, and is uniquely defined as long as |s| is
non-zero. When |s| = 0, Arg{s} is undefined.
Finally, the complex conjugate of s is the value obtained by negating the imaginary part of
the number, that is:
 * = Re     
Arg{s*} = -Arg{s}.
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RVP900 Weather Signal Processing (page 40)
7.1.1
Measured Quantities
The following table summarizes the quantities that are measured and computed by
RVP900.
Subscripts are sometimes used to denote successive samples in time from a given range bin.
For example, sn denotes the I and Q time series or video sample from the n
th
pulse from a
given range bin. In cases where it is obvious, the subscripts denoting the pulse (time) are
dropped. The descriptions of all the data processing algorithms are phrased in terms of the
operations performed on data from a single range bin-identical processing then being
applied to all of the selected ranges. There is no need to include a range subscript in this
data notation.
Table 43 Algebraic Quantities Within the RVP900 Processor
Quantity Description Type
p
Instantaneous IF-receiver data
sample
Real
b
Instantaneous Burst-pulse data
sample
Real
I, Q
Instantaneous quadrature receiver
components
Real
s
Instantaneous time series phaser
value
Complex
s'
Time series after clutter filter
Complex
T
0
Zero
th
lag autocorrelation of A
values
Real
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