This directory contains the antenna maps for OSTM consistent with the IGS08
reference frame and IERS10 standards.

--------------------------------------------------------------------------------
The included files are:
JA2_LC.xyz             - The ionosphere free phase map
JA2_PC.xyz             - The ionosphere free P-code map
antenna_cal_fileFormat - a file describing the antenna map file format

--------------------------------------------------------------------------------
These maps are with the respect to the following reference point / orientation.

Reference Point for both maps relative to center of gravity: 
       1.408794 -0.2171 -0.592275 [meters, XYZ body fixed]

--------------------------------------------------------------------------------
Elevation is measured relative to the bore site of the antenna. The unit vector 
pointing along the bore site is given by:

      0.258969313954337 0 -0.965885549343202 

A unit vector defining the 0 deg. of the azimuth measurement is given by, az_reference):

     -0.965885549343202 0 -0.258969313954337 

Positive Azimuth is measured in the clockwise sense ( Bore site X aZ_referece = -90 deg)

--------------------------------------------------------------------------------
Note that JPL applies these maps using bilinear interpolation in azimuth
and elevation.