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      - Lab 1 - Macro Procedures   
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  • Lab 1 - Macro Procedures:
    • For this lab you will write a macro that will list the values in a state vector at given times through the day.
    • Three sample State Vector files are provided in the dat area of the SYS option tree (sv1.prm, sv2.prm, and sv3.prm).
    • A template for this macro is provided (be sure to save the file with the correct name):
    • The macro takes in four parameters: 
        IN=     - The input file (no default value)
  START=  - The start time (default is 00:00:00)
  END=    - The end time   (default is 24:00:00)
  DELTA=  - The delta between entries in seconds (default is 3600).
      Use UPDATE to add this command to the dictionary.
    • Will need to do the following in the macro:
      • In the DO loop there is a place to call the printStateVector procedure. Add in the call to printStateVector. It should be called with the single parameter sv.
      • In the printStateVector procedure, fill in the section that formats the numbers for TIME, LON, LAT, and ALT. Here is an example of how to do it for the ALT value: 
          invoke altStr altFormat.format(stateVector.alt)
        If you are unsure what parameters are in the stateVector do a RES stateVector in the printStateVector procedure, it will print out all the values you need.
    • Try running the macro. For example: 
      nM> proclab1 sv3.prm 00:00:00 12:00:00 2:00:00
00:00:00.000: 136'55'17.921W 017'42'53.010N  25152090m
02:00:00.000: 128'19'14.927W 057'02'56.486N  20001890m
04:00:00.000: 041'58'50.918W 030'10'07.824N  14310786m
06:00:00.000: 020'13'14.114W 050'43'45.819S  16789154m
08:00:00.000: 056'13'10.695E 052'01'49.926S  23076766m
10:00:00.000: 055'28'49.007E 016'59'38.182S  26278971m
12:00:00.000: 042'53'30.995E 018'19'05.710N  25097732m
nM>

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