Minor Amendment (Mar 10, 1998)

5948-EX-PL-1997 Text Documents

SCIENCE APPLICATIONS INTERNATIONAL CORPORATION

2001-09-21ELS_48719

RECEIVED MAR 1 2 1998 Science Applications International Corporation wcommmimhm Commicsion An Employee—Owned Company Office of Secretary March 10, 1998 Magalie Salas, Secretary Federal Communications Commission 1919 M Street, NW. Room 222 Washington, D.C. 20554 Re: Science Applications International Corporation Minor Amendment to Pending Application for Experimental Radio Station Authorization Dear Ms. Salas: Science Applications International Corporation ("SAIC") hereby submits the attached minor amendment to its pending application for an experimental radio station authorization. This amendment responds to the Commission‘s request for additional information regarding the operations proposed in the application. SAIC respectfully requests that the Commission associate this amendment with the underlying application. Respectfully submitted, SCIENCE APPLICATIONS INTERNATIONAL CORPORATION m —<qiom Fr»ule. [Name] Susan Frank tine Aesichat gedul‘»,«,{ + .gl»m iA W Date: March E, 1998 1710 Goodridge Drive, PO. Box 1303, McLean, Virginia 22102 (703) 821—4300 Other SAIC Offices: Albuquerque, Boston, Colorado Springs, Dayton, Huntsville, Las Vegas, Los Angeles, Oak Ridge, Orlando, Palo Alto, San Diego, Seattle, and Tucson

Jales Cohen, P.E, ORIGINAL Consulting Engineer SUPPLEMENTAL ENGINEERING STATEMENT ON BEHALF OF SCIENCE APPLICATIONS INTERNATIONAL CORPORATION IN SUPPORT OF APPLICATION FOR EXPERIMENTAL LICENSE This engineering statement, prepared on behalf of Science Applications International Corporation ("SAIC") supplements the statement of September 27, 1997. The purpose of the supplement is to supply additional engineering information requested by Commission staff relative to the SAIC application for an experimental license to permit testing of the Vehicle and Electronics Disruption System ("VEDS"). Test Location SAIC now proposes to conduct both Phase I and Phase II testing at the Los Alamos National Laboratory, Los Alamos, New Mexico. Proposed location of the test transmitter is identified by the following geographic coordinates (NAD 27) determined by reference to the Frijoles, New Mexico, 7—1/2 minute US Geological Survey Topographic Quadrangle. 35° 49‘ 27" North Latitude 106° 17‘ 51" West Longitude Emission, Radiated Power and Frequency The emission designator for the pulse transmissions used by VEDS is PON. Radiated power for the system was determined by integrating the power density over the portion of a sphere bounded by the E—plane and H—plane half power angles. An upper bound was obtained by assuming the peak (beam center) power density for the entire area.

JSules Cohen, P.E. Consulting Engineer Supplemental Engineering Statement Page 2 SAIC Experimental License The full E—plane half—power angle is calculated to be 0.14137 radians and the full H—plane half—power angle is calculated to be 0.20944 radians. Radiated energy calculated by ithe integration process for the area (217.4 square meters), and taking into account the impedance of free space (376.7 ohms), yields a figure of 0.15 joules. Since measurements of field strengths are made customarily with 100 millisecond integration time, the time averaged radiated power will be 1.5 watts as measured. Determination of the radiated power spectral distribution must take into account the spectrum analyzer bandpass characteristics as well as measurement integration time. Based on the assumption of a perfect one—megahertz bandpass filter and a sampling period of 100 milliseconds, the Fourier analysis of radiated power versus frequency yields the results depicted in the graph appended hereto as Figure 1. The undersigned wishes to acknowledge the assistance of Mr. Richard W. Sutton of SAIC who provided the data calculations incorporated herein. I declare under penalty of perjury that the foregoing is true and correct. Executed on February 23, 1998. Jules Cohen, P.E.

Figure 1 0.01 T T l ‘\/l 0.001 |— \/H _ Radiated Band—Limited Power, W 110* |— 1—10* |— 110° |— | @ e 7 1 t*10 1°10 7 1*10 % 1°10 5 1°10 10 1°10 1i Frequency, Hz RADIATED POWER MEASURED IN ONE—MEGAHERTZ PASS BAND WITH 100 MILLISECOND INTEGRATION TIME


Document Created: 2001-09-21 08:34:25
Document Modified: 2001-09-21 08:34:25
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