McIDAS Learning Guide
Version 2006

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MD Files - Listing MD File Directories and Data Records

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 changed the Configuration GUI. If not, set it for six frames, as described in Getting Started.

2. Log on and initialize the workstation.

   Type:  LOGON initials project I

3. List the point datasets available in the BLIZZARD dataset.

   Type:  DSINFO POINT BLIZZARD

   DSINFO POINT BLIZZARD 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 OBS SFCHOURLY 1 STORM OF THE CENTURY SFC OBS SHIPBUOY 1 STORM OF THE CENTURY SHIP/BUOY OBS SYNOPTIC 1 STORM OF THE CENTURY SYNOPTIC OBS UPPERMAND 1 STORM OF THE CENTURY UPPER MAND UPPERSIG 1 STORM OF THE CENTURY UPPER SIGS DSINFO -- done

4. List the file directories for the BLIZZARD/PTSRCS dataset.

   Type:  PTLIST BLIZZARD/PTSRCS FORM=FILE ALL

   The dataset position number, schema type, number of rows and columns, and description for each MD file are listed.

   PTLIST BLIZZARD/PTSRCS FORM=FILE ALL Pos Description Schema NRows NCols ------ -------------------------------- ------ ----- ----- 1 SURFACE HOURLY OBSERVATIONS ISFC 72 3500 2 INTL. RADIOSONDE OBS (UPPER AIR IRAB 8 1500 3 INTL. RADIOSONDE OBS--SIG LEVELS IRSG 16 8000 4 SHIP/BUOY OBSERVATIONS ISHP 24 3000 5 SURFACE SYNOPTICS SYN 8 6000 PTLIST: Done

5. List all the MD files stored on your workstation.

   Type:  DMAP MDXX

6. List the structure and keys in the ISFC schema.

   Type:  LSCHE ISFC

   The keys, units, and scale factors for the ISFC schema are displayed as shown below. If the schema type does not exist, register the schema with the SCHE DCISFC command, and then try the LSCHE command again. See the introduction in the McIDAS User's Guide for more information.

   LSCHE ISFC NAME: ISFC VERSION: 7 DATE: 1999085 TEXTID: "SURFACE HOURLY OBSERVATIONS ---- ------- DEFAULT NUMBER OF ROWS: 72 INTEGER ID: 0 COLS: 3500 MISSING DATA VALUE: -2139062144 REPEAT GROUP: NUMBER OF REPETITIONS: 1 STARTING POSITION: 11 SIZE: 25 NUMBER OF KEYS IN ROW HEADER: 4 COL HEADER: 6 STARTING AT POSITION 5 DATA RECORD: 25 STARTING AT POSITION 11 ---- 35 TOTAL KEY SCALE UNIT KEY SCALE UNIT KEY SCALE UNIT ---- ----- ---- ---- ----- ---- ---- ----- ---- TYPE 0 DAY 0 CYD TIME 0 HMS NREC 0 ID 0 CHAR LAT 4 DEG LON 4 DEG ZS 0 M ST 0 CHAR CO 0 CHAR MOD 0 HMS 0 HMS CIGC 0 CC1 0 CC2 0 CIGH -2 FT ZCL1 -2 FT ZCL2 -2 FT VIS 1 MI WX1 0 CHAR WX2 0 CHAR T 2 K TD 2 K DIR 0 DEG SPD 1 MPS GUS 1 MPS PSL 2 MB PCP 2 IN SNO 0 IN PRE 2 MB P24 2 IN WXC1 0 CODE WXC2 0 CODE WXC3 0 CODE WXC4 0 CODE LSCHE: DONE

7. List the parameters in the first file of the BLIZZARD/SFCHOURLY dataset.

   Type:  PTLIST BLIZZARD/SFCHOURLY.1 FORM=PARAM

   Also listed are the units, storage type and format for each parameter.

   PTLIST BLIZZARD/SFCHOURLY.1 FORM=PARAM PARAMETER UNIT STORAGE TYPE DEFAULT FORMAT --------- ---- ------------ -------------- TYPE integer I9 DAY SYD integer I9 TIME HMS integer I9 NREC integer I9 ID character A4 LAT DEG real F9.4 LON DEG real F9.4 ZS M integer I9 ST character A4 CO character A4 MOD integer I9 HMS HMS integer I9 CIGC integer I9 CC1 integer I9 CC2 integer I9 CIGH FT real F9 ZCL1 FT real F9 ZCL2 FT real F9 VIS MI real F9.1 WX1 character A4 WX2 character A4 T K real F9.2 TD K real F9.2 DIR DEG integer I9 SPD MPS real F9.1 GUS MPS real F9.1 PSL MB real F9.2 PCP IN real F9.2 SNO IN integer I9 PRE MB real F9.2 PTLIST: Done

8. List the first record in the first file of the dataset.

   Type:  PTLIST BLIZZARD/SFCHOURLY.1

   PTLIST BLIZZARD/SFCHOURLY.1 Row : 1 Col : 2 TYPE = 0 | DAY = 93072 SYD | TIME = 0 HMS | NREC = 1924 | ID = OAR | LAT = 36.6833 DEG | LON = 121.7666 DEG | ZS = 41 M | ST = CA | CO = US | MOD = 0 | HMS = 235500 HMS | CIGC = 2 | CC1 = 2 | CC2 = _missing_ | CIGH = 15000. FT | ZCL1 = 20000. FT | ZCL2 = _missing_ | VIS = 25.0 MI | WX1 = _missing_ | WX2 = _missing_ | T = 289.27 K | TD = 284.83 K | DIR = 270 DEG | SPD = 6.2 MPS | GUS = _missing_ | PSL = 1019.31 MB | PCP = _missing_ | SNO = _missing_ | PRE = _missing_ | --------------------------------------------------------------------------- Number of matches found = 1 PTLIST: Done

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