The exercise below introduces you to ADDE concepts such as dataset names, aliases, clients and servers. Use this exercise to practice adding entries to your client routing table and local server's mapping table. The image listing, display and copy commands will be explained further in the Satellite Imagery Section.

1. Start a McIDAS session.

   At the Unix prompt:

   Type: mcidas

   Your session should still be set for six frames from the last time you edited your .mcidasrc file. If not, set it for six frames, as described in Getting Started.

2. Log on to the workstation.
   Type: LOGON   initials   project#    I

   List your client routing table's groups and associated server IP addresses.

   Type: DATALOC

   If this is the first time you are using the ADDE, the table is empty and the following listing is displayed.

           Group Name                    Server IP Address
           --------------------         ----------------------------------------
   

   Modify your client routing table so that commands requesting data from a dataset in the group BLIZZARD are routed to the SSEC remote server with the name ADDE.UCAR.EDU (IP address 128.117.15.119).

   Type: DATALOC ADD BLIZZARD ADDE.UCAR.EDU

   A listing similar to the following is displayed. The last line informs you that commands requesting data from a group with the Server IP Address <LOCAL-DATA> are routed to the local server.

           Group Name                    Server IP Address
           --------------------         ----------------------------------------
           BLIZZARD                     ADDE.UCAR.EDU
   
   	<LOCAL-DATA> indicates that data will be accessed from the local data directory.
   

   List all datasets in the group BLIZZARD.

   Type: DSINFO ALL BLIZZARD

   The following listing is displayed. The NumPos value is the number of positions in the dataset.

   DSINFO ALL BLIZZARD
                Dataset Names of Type: IMAGE in Group: BLIZZARD
   
        Name         NumPos   Content
        ------------ ------   --------------------------------------
        G7-IR-4K         3    Storm of the Century G7 IR
        G7-VIS-1K        1    Storm of the Century G7 1K
        G7-VIS-4K        3    Storm of the Century G7 VIS
        G7-VIS-FD        1    Storm of the Century G7 16K
        IMAGES          14    Storm of the Century All Images
        M3-IR            3    Storm of the Century M3 IR
        M3-VIS           3    Storm of the Century M3 VIS
   
                Dataset Names of Type: POINT in Group: BLIZZARD
   
        Name         NumPos   Content
        ------------ ------   --------------------------------------
        OBS              5    Storm of the Century Observational Data  
        PTSRCS           5    Storm of the Century Point Source Data
        SFCHOURLY        1    Storm of the Century Surface Observations
        SHIPBUOY         1    Storm of the Century Ship/Buoy Observations
        SYNOPTIC         1    Storm of the Century Synoptic Observations
        UPPERMAND        1    Storm of the Century Upper Air (Mandatory Levels)
        UPPERSIG         1    Storm of the Century Upper Air (Significant Levels)
   
            No Datasets found of Type: VPROF in Group: BLIZZARD
   
                Dataset Names of Type: GRID  in Group: BLIZZARD
   
        Name         NumPos   Content
        ------------ ------   --------------------------------------
        GRIDS            5    Storm of the Century NGM Grids
   
            No Datasets found of Type: TEXT  in Group: BLIZZARD
            No Datasets found of Type: NAV   in Group: BLIZZARD
        DSINFO -- done
   
   

   List all datasets of type IMAGE in the group BLIZZARD.

   Type: DSINFO IMAGE BLIZZARD

   The following listing is displayed. The NumPos value is the number of positions in the dataset.

                   Dataset Names of Type: IMAGE in Group: BLIZZARD     
                                                              
           Name         NumPos   Content                             
           ------------ ------   -------------------------------------- 
           G7-IR-4K         3    Storm of the Century G7 IR            
           G7-VIS-1K        1    Storm of the Century G7 1K           
           G7-VIS-4K        3    Storm of the Century G7 VIS         
           G7-VIS-FD        1    Storm of the Century G7 16K        
           IMAGES          14    Storm of the Century All Images   
           M3-IR            3    Storm of the Century M3 IR      
           M3-VIS           3    Storm of the Century M3 VIS
   

   List all the images in the dataset BLIZZARD/G7-VIS-4K.

   Type: IMGLIST BLIZZARD/G7-VIS-4K.ALL

   The following listing is displayed. The Pos value is the absolute position of the image in the dataset.

         Image file directory listing for:BLIZZARD/G7-VIS-4K              
           Pos Satellite/         Date       Time      Center   Band(s)   
               sensor                                 Lat  Lon           
           --- -------------  ------------  --------  ---- ---- ------------ 
             1  GOES-7        13 MAR 93072  17:01:00    26   87 1           
             2  GOES-7        13 MAR 93072  17:31:00    26   87 1          
             3  GOES-7        13 MAR 93072  18:01:00    26   87 1         
   

   List the two most recent images (positions 0 and -1) in the dataset BLIZZARD/G7-VIS-4K with expanded information on the available Band (1) .

   Type: IMGLIST BLIZZARD/G7-VIS-4K.-1 BAND=1

   The following listing is displayed. The Pos value is the absolute position of the image in the dataset. The image in position 3 is listed first because it is the most recent image, relative position 0. The image in position 2 is the second most recent image, relative position -1... The Res values are the resolution of the images' center pixels.

         Image file directory listing for:BLIZZARD/G7-VIS-4K               
          Pos Satellite/         Date       Time      Center      Res (km)   Image_Size 
              sensor                                 Lat  Lon    Lat   Lon 
          --- -------------  ------------  --------  ---- ----  ----- ----- ------------ 
            3  GOES-7        13 MAR 93072  18:01:00    26   87  
             Band: 1   0.65 um Daytime cloud detection            4.0   4.0  1337 x 1604 
            2  GOES-7        13 MAR 93072  17:31:00    26   87  
             Band: 1   0.65 um Daytime cloud detection            4.0   4.0  1336 x 1604 
   

   Create the aliases GV4 and GI4 for the dataset names BLIZZARD/G7-VIS-4K and BLIZZARD/G7-IR-4K.

   Type: AKA ADD GV4 BLIZZARD/G7-VIS-4K

   Type: AKA ADD GI4 BLIZZARD/G7-IR-4K

   List the aliases in your client routing table.

   Type: AKA

   The following listing is displayed.

           Alias Name                     Group/Descriptor
           --------------------          ----------------------------------------
   	GI4                            BLIZZARD/G7-IR-4K
   	GV4                            BLIZZARD/G7-VIS-4K
   

   Display the most recent image in the dataset with the alias name GV4. Display the image on frame 1 centered on Athens, Georgia, and draw a map on it. The AKA listing in step 10 shows that the alias GV4 represents dataset BLIZZARD/G7-VIS-4K.

   Type: IMGDISP GV4 1 STATION=AHN[V] SF=YES;MAP VH 2

   The brackets after the station indicate the data type of the station to look for. The brackets are useful for station ID's in which there are more than one city using the ID. In this case, [V] indicates to search for a VOR station with a station ID of AHN because the station ID AHN works for both Athens, Georgia, and Haines, AK, USA.

   Assign the dataset name MYDATA/IMAGES to all of the areas available on your local workstation.

   Type: DSSERVE ADD MYDATA/IMAGES AREA 1 9999 "ALL AREA FILES

   Use the IMGLIST command to find five empty areas on the local server.

   Type: IMGLIST MYDATA/IMAGES.4000 4004

   If data exists in this block of areas, move or delete the areas or use the IMGLIST command to find an empty block of 5 areas.

   Assign the dataset name MYDATA/TEST-IMAGES to the empty block of areas.

   Type: DSSERVE ADD MYDATA/TEST-IMAGES AREA 4000 4004 "Scratch areas for testing

   A listing similar to the following is displayed.

         Group/Descriptor         Type  Format & Range     RT Comment 
         ------------------------ ----- ------------------ -- --------------------
         MYDATA/IMAGES            IMAGE AREA 1-9999           ALL AREA FILES
         MYDATA/TEST-IMAGES       IMAGE AREA 4000-4004        Scratch areas for testing
   

   List the groups in your client routing table.

   Type: DATALOC

           Group Name                    Server IP Address
           --------------------         ----------------------------------------
   	BLIZZARD                      ADDE.UCAR.EDU
   	MYDATA                        <LOCAL-DATA>
   
   	<LOCAL-DATA> indicates that data will be accessed from the local data directory.
   

   Create the alias TI for the dataset name MYDATA/TEST-IMAGES.

   Type: AKA ADD TI MYDATA/TEST-IMAGES

   List the aliases in your client routing table.

   Type: AKA

   The following listing is displayed.

           Alias Name                     Group/Descriptor
           --------------------          ----------------------------------------
   	GI4                            BLIZZARD/G7-IR-4K
   	GV4                            BLIZZARD/G7-VIS-4K
   	TI                             MYDATA/TEST-IMAGES
   

   List all the images in the dataset with the alias name TI. The AKA listing in step 17 shows that the alias TI represents dataset MYDATA/TEST-IMAGES.

   Type: IMGLIST TI.ALL

   The following output is displayed because the dataset has no images.

   	Image file directory listing for:TI
   	IMGLIST: No images satisfy the selection criteria
   

   Copy the most recent image in the dataset with the alias name GI4 to position 5 in the dataset with the alias name TI. Place Athens, Georgia, at its center. The AKA listing in step 17 shows that the aliases GI4 and TI represent datasets BLIZZARD/G7-IR-4K and MYDATA/TEST-IMAGES.

   Type: IMGCOPY GI4 TI.5 STATION=AHN[V]

   Once again, the brackets are used in specifying the station because the directions were to place Athens, Georgia, the VOR station, at the center of the image.

   List all the images in the dataset with the alias name TI.

   Type: IMGLIST TI.ALL

   The following listing is displayed

         Image file directory listing for:TI                            
          Pos Satellite/         Date       Time      Center   Band(s) 
              sensor                                 Lat  Lon         
          --- -------------  ------------  --------  ---- ---- ------------
            5  GOES-7 IR     13 MAR 93072  18:01:00    34   83 8          
   

   Exit McIDAS.

   Type: EXIT