McIDAS-X Learning Guide
Version 2020

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Satellite Imagery - Copying and Displaying Images

1. Show frame 4, copy a GOES-16 0.5km Vis image to position 1 in your MYDATA/TEST-IMAGES (AKA TI) dataset, and display the image on frame 4. The SIZE=SAME keyword copies the entire image to the destination dataset.

   Type:  SF 4

   Type:  IMGCOPY ABI/CONUS TI.1 BAND=2 SIZE=SAME; IMGDISP TI.1 4 LAT=30 87

2. List the two image directories

   Type:  IMGLIST ABI/CONUS FORM=BAND;IMGLIST TI.1 FORM=BAND

   Notice that the images now contain the same information and the band 2 image resolutions are nearly the same.

   Image file directory listing for:ABI/CONUS Pos Satellite/ Date Time Center Res (km) Image_Size sensor Lat Lon Lat Lon --- ------------- ------------ -------- ---- ---- ----- ----- ------------ 1 GOES-16 4 JAN 18004 16:57:20 30 87 Band: 2 0.64 um VIS clouds fog, insol, winds 0.64 0.54 6000 x10000 Band: 14 11.2 um IR Imagery,SST,clouds,rainfall 2.55 2.13 1500 x 2500 Image file directory listing for:TI Pos Satellite/ Date Time Center Res (km) Image_Size sensor Lat Lon Lat Lon --- ------------- ------------ -------- ---- ---- ----- ----- ------------ 1 GOES-16 4 JAN 18004 16:57:20 30 87 Band: 2 0.64 um VIS clouds fog, insol, winds 0.63 0.54 6000 x10000

   The Latitude and Longitude values listed above are the actual resolution values at the center point of the image.


3. Show frame 5, copy the first GOES-16 2km IR image to the second position in your TI dataset, and display the image on frame 5 centered on Boston.

   Type:  SF 5

   Type:  IMGCOPY ABI/CONUS.1 TI.2 BAND=14 STA=KBOS; IMGDISP TI.2 5

4. List the two image directories.

   Type:  IMGLIST ABI/CONUS.1 FORM=BAND;IMGLIST TI.2 FORM=BAND

   In ABI/CONUS.1, the image size of band 14 is 1500 x 2500. Notice that the image size for TI.2 is 480 x 640. If the SIZE= keyword is not specified, a 480 by 640 image sector (the default size of image frames) is copied to the new area.

   Image file directory listing for:ABI/CONUS Pos Satellite/ Date Time Center Res (km) Image_Size sensor Lat Lon Lat Lon --- ------------- ------------ -------- ---- ---- ----- ----- ------------ 1 GOES-16 4 JAN 18004 16:57:20 30 87 Band: 2 0.64 um VIS clouds fog, insol, winds 0.64 0.54 6000 x10000 Band: 14 11.2 um IR Imagery,SST,clouds,rainfall 2.55 2.13 1500 x 2500 Image file directory listing for:TI Pos Satellite/ Date Time Center Res (km) Image_Size sensor Lat Lon Lat Lon --- ------------- ------------ -------- ---- ---- ----- ----- ------------ 2 GOES-16 4 JAN 18004 16:57:20 42 71 Band: 14 11.2 um IR Imagery,SST,clouds,rainfall 3.21 2.12 480 x 640

5. Show frame 6, copy a GOES-16 2km Infrared image to TI.3 centered on Mobile, Alabama, and increase the resolution by a factor of 2. Display it on frame 6.

   Type:  SF 6;IMGCOPY ABI/CONUS.1 TI.3 STATION=MOB BAND=14 MAG=2;IMGDISP TI.3 6

   The image is displayed on frame 6 with a resolution of 1 km (2km is listed due to the base resolution of the satellite being 0.5km).


6. List the two images to compare image resolutions. Note that the lat and lon resolution values are different between the images.

   Type:  IMGLIST ABI/CONUS.1 BAND=14 FORM=BAND;IMGLIST TI.3 FORM=BAND

   The original image (ABI/CONUS.1 BAND=14) had a resolution of ~2 km and the new area (TI.3) has a resolution of ~1 km. This is a blow up.


7. Display a loop of GOES-16 Meso1 images from 17 to 18 UTC on frames 4 through 6 and use the REFRESH keyword to plot a high resolution map on each of the images.

   Type:  IMGDISP RTGOESR/M1C10 TIME=17 18 ALL=4 6 REFRESH='MAP VH GRA=(GRA) IMA=(IMA)'

   Notice that the numbers placed into the MAP command's GRA and IMA keywords take the place of (GRA) and (IMA) and now match the image frame numbers of the loop.

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