MSC Introductory Weather Radar Course

A particular stage or point of advancement in a cycle; the fractional part of the period through which time has advance, measured from some arbitrary origin.

The angular difference if two periodic functions have the same angular velocity.

Description

Display on which radar signals are shown in plan position with range and azimuth angle displayed in polar coordinates, forming a map-like display.

The PPI is a 2D-map projection of a conical surface at predefined elevation containing either reflectivity, precipitation intensity, the radial component of wind velocity or one of the dual polarization parameters. A Polar volume consists of many PPIs. A set of PPIs for various elevations may be given inside of the same product, but they all must contain the same product data quantity.

Notes

• PPI of velocity can be used as input for dual Doppler products
• For dual pol parameters other optional parameters...

Description

The Polarimetric Correlation Coefficient ρ_hv provides the complex correlation between the horizontally and the vertically polarized signals.

Notes

• The ρ_hv data is a useful indicator describing the regularity or irregularity, shape and canting angles of hydrometeors.

The direction of the electric vector in a field of electromagnetic energy.

Motion of electromagnetic energy as waves through or along a medium.

A single short duration transmission of electromagnetic energy.

Linear distance in range occupied by a burst of transmitted radio energy. This may also be expressed in units of time. Also called pulse length or pulse width.

The linear distance in range occupied by an individual broadcast from a radar. Also called the pulse width.

Nickname for the technique of mean velocity estimation by calculation of the signal complex covariance argument. The calculation requires two consecutive pulses.