The MITRE Corporation

FEDERAL COMMUNICATIONS COMMISSION APPLICATION FOR SPECIAL TEMPORARY AUTHORITY

Applicant Name

Name of Applicant:

The MITRE Corporation

Address

Attention:	Janet Werth
Street Address:	202 Burlington Road
P.O. Box:
City:	Bedford
State:	MA
Zip Code:	01730
Country:
E-Mail Address:	[email protected]

Best Contact

Give the following information of person who can best handle inquiries pertaining to this application:   Last Name: werth First Name: janet Title: Senior Principal Engineer Phone Number: 339 927 6012

Explanation

Please explain in the area below why an STA is necessary: There is significant interest within the US military community to improve HF communications performance in disturbed environments. To achieve this goal is it necessary to both inform the engineering community on the characteristics of a disturbed environment and to design/test waveforms that are capable of operating more effectively in the disturbed environment. In the absence of predefined ionospheric disturbance, the test team looks to simulate an ionospheric irregularity similar to what would be observed in a High Altitude Nuclear Event (HANE). The Team will create an ionospheric disturbance using the Arecibo Heater in Puerto Rico. NRL, AFRL, and MITRE researchers will be studying the ionospheric disturbance. The use of a vertical sounder will provide significant insights into knowledge of how the heater is working.

Purpose of Operation

Please explain the purpose of operation:

The Digisonde use requested here will provide regular vertical sounding information that will characterize the ionosphere above the Arecibo heater. This information provide a unique measurement of how the heating is modifying the ionosphere and will be essential for the interpretation of the measurements.

Information

Callsign:
Class of Station:	FX
Nature of Service:	Experimental

Requested Period of Operation

Operation Start Date:	06/03/2019
Operation End Date:	07/03/2019

Manufacturer

List below transmitting equipment to be installed (if experimental, so state) if additional rows are required, please submit equipment list as an exhibit:
Manufacturer	Model Number	No. Of Units	Experimental
Lowell Digisonde International	DPS-4D	1	No

Certification

Neither the applicant nor any other party to the application is subject to a denial of Federal benefits that includes FCC benefits pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. Section 862, because of a conviction for possession or distribution of a controlled substance. The applicant hereby waives any claim to the use of any particular frequency or electromagnetic spectrum as against the regulatory power of the United States because of the prvious use of the same, whether by license or otherwise, and requests authorization in accordance with this application. (See Section 304 of the Communications Act of 1934, as amended.) The applicant acknowledges that all statements made in this application and attached exhibits are considered material representations, and that all the exhibits part hereof and are incorporated herein as if set out in full in this application; undersigned certifies that all statements in this application are true, complete and correct to the best of his/her knowledge and belief and are made in good faith. Applicant certifies that construction of the station would NOT be an action which is likely to have a significant environmental effect. See the Commission's Rules, 47 CFR1.1301-1.1319.

Signature of Applicant (Authorized person filing form):	Janet Werth
Title of Applicant (if any):	Senior Principal Engineer
Date:	2019-04-25 00:00:00.0

Station Location

	City	State	Latitude	Longitude	Mobile	Radius of Operation
	Arecibo	Puerto Rico	North  18  25  50	West  66  34  49		1.00

Datum:  NAD 83 Is a directional antenna (other than radar) used?   Yes Exhibit submitted:   No (a) Width of beam in degrees at the half-power point:   60.00 (b) Orientation in horizontal plane:   (c) Orientation in vertical plane:   30.00 Will the antenna extend more than 6 meters above the ground, or if mounted on an existing building, will it extend more than 6 meters above the building, or will the proposed antenna be mounted on an existing structure other than a building?   Yes (a) Overall height above ground to tip of antenna in meters:   36.58 (b) Elevation of ground at antenna site above mean sea level in meters:   91.40 (c) Distance to nearest aircraft landing area in kilometers:   8.00 (d) List any natural formations of existing man-made structures (hills, trees, water tanks, towers, etc.) which, in the opinion of the applicant, would tend to shield the antenna from aircraft: N/A

Action	Frequency	Station Class	Output Power/ERP	Mean Peak	Frequency Tolerance (+/-)	Emission Designator	Modulating Signal
New	1.00000000-30.00000000 MHz	FX	0.300000 kW 1.829000 kW	P	0.00100000 %	30K0V7D	PCM

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