weather [ parameter=value ... ] [ inputfile ... outputfile ]
Parameters are: master_file, text_height.
weather creates a TeraScan graphics metafile containing weather symbols from McMurdo DCS data, which are created by mcmegu. Any other one dimensional TeraScan dataset with the same variables (platform id, date, time, latitude, longitude, temperature, pressure, wind dir, wind speed) can also be used as the input dataset. The temperature (in degrees C) and pressure (in millibars) are shown above the weather flag. The wind direction and speed, in knots per hour , are shown as flags with full barbs indicating 10 knots/hr increments in speed and half barbs indicating 5 knots/hr increments in speed. The metafile can be rendered on the display using the XVU commands.
The height of the text can be adjusted for large images that must be reduced to fit on the display screen. Large, continent sized master datasets use a text_height of 8.0 pixels. Master datasets up to 1280 by 1024 kilometers use a text_height of 22.0 pixels.
Only the latest record for each platform in each dataset is shown. If the platform occurs in two or more input datasets the platform data are displayed multiple times.
There is one or more input TeraScan datasets that contains the McMurdo DCS data and there is one output TeraScan dataset that contains the graphic metafile data.
This is file name of the master dataset. The earth location transform of the master dataset is used to convert latitude and longitude coordinates to line and sample coordinates during the metafile generation process. See MASTER for more information on master datasets. master_file may be any TeraScan dataset with an earth transform. The default is [Master].
This is the size, in units of pixels, of the weather symbols. Valid responses are [>=1]. The default is [22].
Generate weather symbols for a dataset containing McMurdo DCS data.
[1] % weather mcm.dat mcm.weather master_file : char(75) ? [Master] text_height : real ? [22]
dcsin, dcsloc, dcslist, dcsmix, tracks, dcs
Last Update: $Date: 1998/05/29 20:58:57 $