Antenna test diagram and signal description

1406-EX-ST-2019 Text Documents

Umbra Lab

2019-07-31ELS_234973

Directional Antenna Information, Antenna Sketch, Modulating
        Signal Description, and Proposed Test locations


                                                                 Umbra Lab Inc
                                                           File # 1406-EX-ST-2019


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                                             Subject to the Restrictions on the Title Page of this Document.


Top Down View of UMBRA Lab Airborne test



        HPBW1




                   Illuminated Area
                                                                                                     Max ERP = 3.2 W

                       HPBW2
                HPBW1 = +/- 3.5° Azimuth Angle
                HPBW2 = +/- 10.6° Range Angle

                       Note: Half Power Beam Width (HPBW) is the -3dB Beamwidth


                                                                                                                       2
                                   Subject to the Restrictions on the Title Page of this Document.


Side View of UMBRA Lab Airborne test



                                                                                 Altitude < 3,200 m




                                                                                                       Boresight Elevation
           HPBW = Elevation Angle                                                                      = 60° from Nadir
           +10.6°

                                                HPBW = Elevation Angle
                                                -10.6°



                         Note: Half Power Beam Width (HPBW) is the -3dB Beamwidth


                                                                                                                             3
                                     Subject to the Restrictions on the Title Page of this Document.


Modulating Signal Description
        ➢ Modulation
          ➢ Linear Frequency Up-chirp or Down-chirp of carrier
        ➢ Modulated Signal Bandwidth = 1,200 MHz max
        ➢ PRF = 2,000 to 8,000 Hz
        ➢ Duty Cycle < 20%




                                                                                                              4
                                            Subject to the Restrictions on the Title Page of this Document.


  Ground test location
Mobile ground test located at:
N34°29’32” , W119°40’46”
                                                            Los Padres National Forest

Spotlight image of Gibraltar
dam for performance benchmark


Test duration: 10 scans at 7
seconds each over <60 minutes             Santa Ynez Mountains
in total

                                                                                                   Santa Barbara


                                                      Goleta




                                 Subject to the Restrictions on the Title Page of this Document.


Proposed ground tracks and waypoints for flight test
The approximate flight path is shown here, with way points indicated by their
number, and listed in the table. The shaded boxes indicate the approximate stripmap
of data that will be collected on each respective path, indicating when the radar
equipment will be active. The path allows for variation in takeoff and landing at Santa
Barbara Airport, as no stripmaps begin or end within the immediate vicinity. The path                            Way      Latitude      Longitude
also maintains a reasonable proximity to Santa Barbara Airport, resulting in a flight                            Point     (deg)          (deg)
path length of about 70 miles and should take approximately 40 minutes.                                           1      34.42773816   -119.83834852

                                                                                                                  2      34.37660890   -119.68130993

                                                                                                                  3      34.39366911   -119.50041752

                                                                                                                  4      34.28220499   -119.42275024

                                                                                                                  5      34.38043272   -119.59295927

                                                                                                                  6      34.34327249   -119.74037932

                                                                                                                  7      34.39196721   -119.76253322

                                                                                                                  8      34.35695781   -119.88176697

                                                                                                                  9      34.40148724   -119.96943450




                                               Subject to the Restrictions on the Title Page of this Document.



Document Created: 2019-07-31 15:53:33
Document Modified: 2019-07-31 15:53:33

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