Detail Description Document

1745-EX-ST-2016 Text Documents

L-3 Communications

2016-12-19ELS_185746

L-3 Communications, CS-W File Conf. No.: EL885878 Special Temporary Authorization STA File No.: 1745-EX-ST-2016 Date: 11/29/2016 Call Sign: zzzzzz Application Background: The purpose of this project is to ground and flight test with point-to-point data links for application to mobile communications for military applications. Concept of Operations There will be two (2) test stations operating a single bi-directional data link. The test stations are ground and airborne based. The aircraft is a Cessna 172 operating at approximately 3000 ft AGL. The links are referred to as the Forward or uplink (ground to air), and the Return or downlink (air to ground). Figure 1 illustrates the concept of operations for ground-to-airborne testing where the lightning bolts represents the datalink. Testing may include ground checks, airborne-to- ground tests, or ground-to-to-airborne tests. The test stations and associated data links are defined below: • Station #1 will be ground based • Station #2 will be airborne based Spectrum Requirements The data link used will operate in C-Band, between 4400–4940 MHz and in S-Band, between 2200–2290 MHz. The radio is an L-3 product designed for these bands. A single 2.5 Mbps data rate will be used, which uses QPSK modulation LDPC ½ FEC, and root raised cosine filtering alpha=0.33. The emission designator for this waveform is 3M36G1D. The data link is comprised of the Air Net Rover radio part number 1000411673; one in an airborne application and one in a ground based application. The data link will operate in C-band (4.4-4.94 GHz) for the uplink and in S-band (2.2-2.29 GHz) for the downlink.The radios are both connected to omni antennas.

Figure 1: Datalink System Configuration Ground & Flight Testing Summary Location of Ground Equipment: The approximate locations of the ground stations are shown in Figure 2.  Ground station #1, approximate location: Lat: N 40°47’1.46”, Long: W 111°57’7.65”, Alt 4269 feet (on the L-3 CSW campus located at 640 N. 2200 W. Salt Lake City, UT). Location of Airborne Equipment: The approximate location of the aircraft flight profile is shown in Figure 2. Typical altitude is 3000 ft AGL. Approximate waypoints are listed below: WP1: (Lat: N 40°44’00”, Long: W 111°53’00”) WP2: (Lat: N 40°27’00”, Long: W 111°53’00”) WP3: (Lat: N 40°27’00”, Long: W 111°47’39”) WP4: (Lat: N 40°44’00”, Long: W 111°47’39”)

Racetrack center at Lat: N 40°35’30”, Long: W 111°50’10”) Approximately 20 miles north to south length Approximately 5 miles west to east width Figure 2: Location of Flight Test Equipment


Document Created: 2016-12-19 10:07:20
Document Modified: 2016-12-19 10:07:20
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