GEMPAK Manual |
Programs | Parameters
QSCT
QSCT is the ending valid time for the QuikScat or ambiguity wind data,
the speed intervals and colors, the wind barb size and width and
plotting flags. Skip is a value that indicates how many rows and data
points to skip when plotting. The flags include High Wind Speed, Low
Wind Speed, Rain, Sensor Availability.
Data type | End time | Speed intervals | colors1 | colors2 |
Arrow/Barb shaft size;Arrow/Barb width;Arrow head size;
Type of wind vector | Skip | Time stamp interval | Time stamp color |
Line Width | High Spd | Low Spd | Rain | Availability | Rain Colors |
Plot Circles
The data type is a selection to plot QSCT, QSCT_HI, AMBG1, AMBG2, AMBG3,
or AMBG4 data.
The ending time is the latest time for which QuikScat data or QuikScat
ambiguity data will be plotted. The ending time is given as a GEMPAK
date/time string. Any missing items from the string will be filled in
by the system time. The ending time may also be LAST. LAST will use
the system time and plot all QuikScat data for the preceding 4 hours.
ALL is not accepted as an ending time for QuikScat data.
The speed intervals and colors may each be specified using either a list
separated by semicolons or a range in the form first-last-increment.
Speed intervals are given in knots. If any color is missing, a default
will be used. If no interval and color are given, a single speed
interval of 200 knots will be used. This means that any wind speed less
than 200 knots will be plotted. The default color for the single speed
is green. If the rain flag in the data is true, and the rain colors flag
is true, the wind bard is plotted in the second colors for that wind speed.
If the rain flag is false or the rain colors flag is false, then the
first color is used.
The wind arrow/barb attributes are the shaft size of the arrow or barb,
width of the arrow or barb, size of the arrow head, and the type of wind
vector separated by a semicolon. The default shaft size is 0.2, the
default width is 1, the default arrow head size is .4 , and the default
type of wind vector is 5 for wind barb. The other values for type of wind
vector is 1 or 3 for directional arrow and 4 for regular arrow. If no
value is given for the type of wind vector, then if the arrow head size is
greater than 0, directional arrows will be plotted, otherwise wind barbs
will be plotted.
The Skip value is an integer used for skipping rows and columns of data
when plotting the winds.
The time stamp interval is the time interval in minutes. Line width is
the width of the time stamp. The default value is 30 time stamp interval
and 1 for line width.
The flags correspond to flags in the QuikScat data. The High Speed,
Low Speed, Rain present and Sensor Availability flags allow the user
to display wind data that has any of these attributes. The default
for all flags is NO.
The Plot Circles flag indicates whether circles should be plotted along
with the wind barbs/arrows for rain flagged winds.