9.3 Real-time Data Access - Fronts
In this exercise you will display current and forecasted NCEP fronts on
maps and over satellite images.
- Erase the images and graphics on frames 1 through 4.
- Type: ERASE F 1 4
- Display the most recent NCEP frontal positions on a map of the
Entering 'LATEST' in the time parameter will use the latest analysis
within the previous 6 hours. You should get a map that looks similar
- Type: FRNTDISP NACONF LATEST
- Next, list the decoded front point and High/Low positions in a
You will see that the data is listed in a format that labels the
latitude, longitude and pressure of each High and Low, and the latitude
and longitude for each point of the troughs and fronts.
- Type: FRNTDISP USA LATEST OUT=TAB
- Display the most recent GOES-East IR image centered over Topeka
with a magnitude of -2 on frame 2. Overlay the latest NCEP fronts on the image.
- Type: SF 2;IMGDISP RTIMAGES/GE-IR MAG=-2 STA=TOP;MAP
The default of FRNTDISP is to use the current frame navigation to
display the latest NCEP frontal positions.
- Type: FRNTDISP
- Display the 24 hour forcast over the United States at 0Z on frame 3.
This commands draws the 24-hour forcast fronts in today's 00 UTC NCEP
frontal position analysis product on a map of the United States.
- Type: SF 3;FRNTDISP USA 0 FHOUR=24