readme.txt

这是用于生成GPS星空图的一个c++程序

               HOW TO USE SKYPLOT.EXE
               ----------------------

1) Create a working directory (ie, c:\work) and update 
   'skyplot.inp' with information related to the site.  
   An example 'skyplot.inp' is shown below as

1995  9  2  18 30 0
1995  9  2  20 30 0 
brdc2450.95n
GRAZ 47.0671 15.4935 538.3
10

  Note 1:  Make sure the orbit file (either broadcast or SP3)
  covers the time span requested in lines 1 and 2 of skyplot.inp.

  Note 2:  It may be necessary to supply the entire path
  for the orbit file (eg, c:\work\brdc2450.95n )

2) Execute skyplot.exe at the DOS prompt.  For example:

   c:\work>c:\bin\skyplot.exe

3) Examine 'skyplot.log' to ensure that 'skyplot.inp' was
   read correctly.  'skyplot.log' should report 
   "Normal Termination"

4) Assuming GMT (Generic Mapping Tools) exists and is 
   properly loaded on the computer, issue the command 
   'skyplot.bat'.  For example:

   c:\work\skyplot.bat

   Note:  If ERROR messages related to 'psxy', 'pstext',
   or 'psvelo' appear, then it is likely that GMT is
   improperly loaded on the computer.  See the GMT home 
   page (http://gmt.soest.hawaii.edu/) for assistance.

5) Use ghostview or your favorite postscript viewer to
   examine and print the file 'skyplot.ps'.




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June 27, 2002