= phasei (or t.phasei depending on version) =

Version 1.1 - 25 Nov 2020 - Eric E. Palmer
Given an image and a bigmap, determines local phase, emission angle, and incidence angle and writes them to a TXT file. Also output other data, including a text file for the latitude and east longitude of each pixel (which is independent of the image chosen).

=== Input - files ===
 * JRW believes there are none required. Just need MAPFILES, SUMFILES, and NOMINALS directory.

=== Input - stdin ===

 * Bigmap name (six characters)
 * Image name (12 characters, can use symbolic link if actual name is > or < 12)

Example
{{{
IN1ED1
XXXXXXXXXXXX
}}}


=== Output ===
 * <bigmap>-a.TXT - local phase
 * <bigmap>-e.TXT - local emission
 * <bigmap>-i.TXT - local incidence
 * <bigmap>-h.TXT - x slope
 * <bigmap>-v.TXT - y slope
 * <bigmap>-lat.TXT - latitude
 * <bigmap>-lon.TXT - east longitude
 

----------
Note: 
 * a, e, and i all have the upper left pixel value agree with the direction seen in SHOWMAP for the bigmap.
 * HOWEVER, lat and lon will need to be flipped top to bottom, then rotated 90 degrees clockwise to agree with the bigmap. JRW hasn't checked the orientation of x and y slope.