This directory contains the antenna maps for Jason-1 consistent with the IGS08
reference frame and IERS10 standards.

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The included files are:
JA1_LC_release_11a.xyz             - The ionosphere free phase map
JA1_PC_release_11a.xyz             - The ionosphere free P-code map
antenna_cal_fileFormat - a file describing the antenna map file format

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

Reference Point for both maps relative to center of gravity: 
        1.434   -0.218  -0.5042 [meters, XYZ body fixed]


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

      0.498025898020063  -0.0440022881784795  -0.866045035512801

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

      0.867162128635796  0.0250200888158169  0.497397062532021 



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

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