Envi procedures for InSAR analysis
18 may 2005
by frede and lhsu
send questions to lhsu

-----------------------------
Making profiles (version 3.6)
-----------------------------

1) enviheader.pl geo_**.unw
   (make the headerfile)

2) envi (for version 3.6)

3) Load the .unw

4) Open Band 2 (phase)

5) Tools -> Profiles -> Arbitrary -> click left/right/right

6) To figure out the endpoints of the profile:
   Tools -> Cursor Location Value

7) To go to the same place in a different interf:
   Tools -> Pixel Locator -> Map Coordinates
 
---------------
For version 3.4
---------------

2) envi
   this version 3.4

3) -> open data file
   open .unw file

4) Load band2

5) (changing the color table)
   Tools -> color mapping -> Envi color table -> rainbow

6) To make profiles of the phase or magnitude, etc.

   Tools -> Profiles -> Arbitrary -> 
  
  a window Spatial profile Tool pop up
  choose scroll or image depending where you want to draw. 
  
  click left mouse button to
  start profile, do not hold, click left to finish and
  then right mouse button twice to end the profile. 
  The profile should pop up by itself. 
  Then you can save it as an ASCII text file.


  the profile is data value (phase change in radians) 
  as a function of Location (numbers of pixels)
  data is zero when you have no data

  To figure out exactly where your cursor is:

  Tools -> cursor location value :
  move the mouse, it gives me where I am

  and for another interferogram, I can put value in 
  Tools ->  Pixel Locator -> Map Coordinates (repeatibility)

  To save text files:
  Go to the window with the profile
  File -> save plot as -> ascii

  highlight Band 2....
  keep the default precision (6 decimal points)

  choose : to give the file name