Vaisala IRIS, User Manual

Page: 16 / 394

Product Description
PPI
Plan Position Indicator
PPI is a full screen image used primarily for weather surveillance
purposes.
RAIN1
1)
Hourly Rain Accumulation
RAIN1 is hourly rainfall accumulation.
RAINN
1)
N -Hour Rain Accumulation
RAINN is rainfall accumulation of the last N hours, where N is selected by
the user.
RAW
Raw Data Product
A RAW data file that contains the raw signal processor output
parameters (
Z
,
ZT
,
V
,
W
,
ZDR
, and so on) in polar coordinates.
A RAW file contains all the information collected during a measurement
task. It is compressed so it can be sent over the network to IRIS Analysis.
While
RAW data cannot be displayed, it is useful for recording on tape/
disk/DVD or transferring to another IRIS network computer for product
generation.
RTI
1)
Range Time Indicator
RTI displays time along the horizontal axis and the vertical axis displays
range from the radar.
Often used for manual scans when observing a fixed target.
RHI
1)
Range Height Indicator
RHI is a full screen image showing the detailed cross-sectional structure
of a storm, used for identifying severe storms, hail and bright band.
SRI
1)
Surface Rainfall Intensity
SRI provides input for the RAIN1 product to obtain the best possible
estimates of accumulated precipitation even at longer ranges from the
radar.
STAT
Radar System Status
A STAT file contains a report indicating the state of all key components
of the radar software.
THICK
Echo Thickness
THICK shows the thickness of cloud echoes.
THICK is the same as the difference between the TOPS and BASE values.
The THICK product also computes the average reflectivity in the layer
identified by the selected dBZ Contour .
TOPS
Echo Tops Map
TOPS is a color-coded contour map of the top of a selected dBZ level.
Either
Z
or
ZT
can be used as the basis for the estimate.
TRACK
1)
Interactive Storm Tracking and
Forecasting
TRACK products show the projected motion for storm features
(centroids) based on a series of input products from different times.
TRACK is an overlay product created in the Quick Look Window .
VAD
1)
Velocity Azimuth Display
VAD is a display of the mean Doppler velocity at a given range as a
function of the azimuth angle as the radar antenna rotates through an
azimuth scan at a constant elevation.
VIL
1)
Vertically Integrated Liquid
VIL is a color-coded map of the estimated depth of water (in mm)
contained in a selectable atmospheric layer. This is an excellent indicator
of severe storms.
Either
Z
or
ZT
can be used as the basis for the estimate.
VVP
1)
Velocity Volume Processing
VVP provides line graphs or time against height cross-sections of wind
speed, wind direction and divergence against height.
You can select the range of influence and the maximum height.
IRIS Product and Display User Guide M211319EN-H
14 RESTRICTED