Ten files are included here in this zipped file.  There are four files for DBS antennas, two for antennas provided by Northpoint, three that relate to the antenna data received form Pegasus, and this readme.txt file.  Except as noted below, all files are text files.

The DBS antenna files are based on data measured by MITRE/Bedford.  Files are as follows:

1. "directv_18.txt" This file has the antenna data for the 18-inch DIRECTV reflector.  Data is provided over the complete sphere as a function of spherical coordinate angles in one-degree steps.  The antenna is oriented so that the main beam is aligned with the x-axis.  The file contains 14 columns as follows:
- theta: the angle from the z-axis in degrees
- phi: the angle of the projection onto the xy plane relative to the x axis
- gain in dBi for RHC polarization at 12.2 GHz
- gain in dBi for LHC polarization at 12.2 GHz
- gain in dBi for vertical polarization at 12.2 GHz
- gain in dBi for horizontal polarization at 12.2 GHz
- gain in dBi for RHC polarization at 12.45 GHz
- gain in dBi for LHC polarization at 12.45 GHz
- gain in dBi for vertical polarization at 12.45 GHz
- gain in dBi for horizontal polarization at 12.45 GHz
- gain in dBi for RHC polarization at 12.7 GHz
- gain in dBi for LHC polarization at 12.7 GHz
- gain in dBi for vertical polarization at 12.7 GHz
- gain in dBi for horizontal polarization at 12.7 GHz

2. "directv_24x18_single.txt" This file has data for the 24-inch by 18-inch DIRECTV reflector antenna, used in the single-feed mode.  The format is the same as described above.

3. "directv_24x18_dual.txt" This file has data for the 24-inch by 18-inch DIRECTV reflector antenna, used in the dual-feed mode.  The format is the same as described above.

4. "fortel.txt" Data for the Fortel planar array.  Same format as above.



There are two data files for antennas provided by Northpoint.  These files are based on data measured by MITRE/Bedford.  The files are:

1. "small_sectoral.txt"  This file has data for the small sectoral horn provided by Northpoint.  

2. "large_sectoral.txt" this file has data for the large sectoral horn provided by Northpoint.




Three files are attached for the Pegasus antennas.  These files are based on hard-copy antenna pattern data received from Pegasus.  Files are as follows:

1.  "Raw Pegasus E-Plane Antenna-Pattern Data.xls" A spreadsheet containing the raw E-plane patterns of the Pegasus 14-dBi
large horn (model 810) and 11-dBi small horn (model 800) transmitting
antennas, as digitized at one-degree intervals from analog
patterns provided by Pegasus.  The data in each of these worksheets is
referenced to an arbitrary level and is NOT in dBi.  The patterns show only
the 12.45-GHz principal (horizontal) polarization response of the antenna,
and only in the horizontal plane.  Even within that plane, each pattern
contains gaps.  The large 14-dBi horn's pattern covers only the azimuthal
range from -111 through +111 degrees, inclusive.  The small 11-dBi horn's
pattern covers the azimuthal range from -111 through +180 degrees,
inclusive.

2.  "Pegasus 11-dBi Small Horn.ZIP"  A zipped version of a much larger text file containing the small 11-dBi
horn's pattern, in the same format in which MITRE/Bedford
provided the measured Northpoint patterns.  We generated this pattern from
the raw data as follows:  a) converted the data to dBi.  b) filled in
the "left-backlobe gap" by assuming right-left symmetry of the pattern in
the affected region.  c) assumed the vertical cross-polarization
component was 25 dB weaker than the measured horizontal component at every
azimuth angle.  d) assumed the RHC and LHC components were each 3 dB down
from the measured horizontal-polarization value at every azimuth angle.  e) 
assumed the 12.20- and 12.70-GHz values were identical to those measured
at 12.45 GHz.  f) Since we'll only be using doing horizontal-plane
calculations (in which elevation angle theta is 90 degrees) for Pegasus, we
filled in the rows for all other values of theta (from 0 to 180 degrees) by
copying from the values measured for theta = 90.

3.  "Pegasus 14-dBi Large Horn.ZIP"  A zipped version of a similarly formatted text file containing the
large 14-dBi horn's pattern.  We used the same methodology as for the 11-dBi
antenna, with two modifications:  We filled in the 14-dBi antenna's backlobe
gap by copying horizontal-polarization data from the same region of the the
11-dBi pattern.  And, for every azimuth angle, we assumed the
vertical-polarization component was 30 dB (instead of 25 dB) down from the
horizontal-polarization component.