Test Description

2030-EX-ST-2018 Pre Coordination Document

Johns Hopkins University Applied Physics Laboratory (JHU/APL)

2018-12-04ELS_220651

DESCRIPTION OF TESTING AND COORDINATION Testing The STA will cover tests to be conducted at the Johns Hopkins University Applied Physics Laboratory’s Satellite Communications Facility (SCF). The 18.3 meter diameter antenna will be used to transmit the test signals. These tests will be implemented by the same personnel that routinely operate the SCF. Signals of various modulation schemes will be transmitted intermittently within the January-June 2019 timeframe. Each individual test transmission will be directed at a low earth orbit (LEO) “calibration sphere”. These “calibration spheres” are routinely used for tests by radar developers and operators. The specific calibration spheres have not yet been selected. Each individual test should not exceed 30 minutes of transmission. The transmitted signals will be circularly polarized and not to exceed an EIRP of 80 dBW. The elevation angle of the transmit antenna should be above 15 degrees to minimize impact on terrestrial receivers. Coordination We will coordinate prior to testing with Mr. Vincent Scott Galbraith, Spectrum Manager at NASA Goddard Space Flight Center, as well as with the local Society of Broadcast Engineers, Inc. (SBE) frequency coordinator. Sincerely, Mr. Eliud Bonilla Professional Staff Johns Hopkins University - Applied Physics Laboratory 11100 Johns Hopkins Road Laurel, MD 20723 [Please see the attached SCF Data Sheet below.]

The Satellite Communications Facility (SCF) at the Johns Hopkins University Applied Physics Laboratory (APL) traces its genesis to the early days of Sputnik. Since the first signal from space, APL has provided the nation with global timing and positioning solutions, world class space and planetary science, robust and reliable spacecraft, and precise navigation, commanding and communications to ensure mission success. Quality and Cost—effective Support Established in 1961 to support the command and telemetry requirements of the world‘s first satellite navigation system under contract to the U.S. Navy, the APL station has provided more than 50 years of ground contact support to our sponsors. The station has conducted over 100,000 satellite contacts in the last 15 years alone. With available, on—call technical support, the station has been conducting attended and unattended spacecraft tracking operations since 1995. Assets at APL include two independent operational antenna systems. Our mid—latitude station can be configured to support a wide variety of missions Station Details ranging from Low Earth Orbit (LEO) through Deep Location | se:t0 N,re:sa w _ Space, with a variety of data formats, including TDM Antenna 5—meter, 60—foot (18.3—meter) and CCSDS. Current capabilities include support for L—band, S—band, and X—band communications. Recent system improvements and technology for government, academia, and commercial operations enhancements enable these systems to provide future on a non—exclusive basis. While currently these systems sponsors with advanced capability at cost—effective are conducting routine daily contacts, their availability for rates. APL‘s concept of a Shared Service, Multi—mission additional contacts is still over 60%. Portions of these Ground System makes the remote scheduling and data facilities are owned by the U.S. government and some transfer capabilities of these systems highly attractive restrictions on their use may apply. & JOHNS HOPKINS APPLIED PHYSICS LABORATORY

5—Meter System Downlink L—band S—band X—band Frequency Range 1650—1750 MHz 2200—2300 MHz 8000—8500 MHz Polarization RHC él:é_‘ * RHC @T >11.2 dB/K >13.6 dB/K >24.1 dB/K Beamwidth 2.5 deg 1.8 deg 0.5 deg Antenna Pointing Control Program track (TLE, Spice—SPK, Chebychev Polynomials. RA/DEC) 60—Foot (18.3—Meter) System Downlink S—band X—band Frequency Range 2200—2400 MHz 8400—8500 MHz Polarization Simultaneous Rgé;nd LHC | Simultaneous RHC an’erHCV GT >28.3 dB/K | >38.5 dB/K Beamwidth 0.5 deg § A 0.13 deg Uplink S—band Frequency Range 2025—2120 MHz Polarization "On—the—fly" Selectable LHC or RHC Beamwidth 0.5 deg EIRP >80 dBW Transmitter 2000 W Klystron (dual redundant) Antenna Pointing Control Program track (TLE, Spice—SPK, Chebychev, RA/DEC), S—band Autotrack, S/X—band Steptrack CCSDS Compliant Command, Ranging, Doppler & Telemetry, including Turbo (r1/2, 1/3, 1/4, 1/6), Convolutional (r1/2), Reed—Solomon, and Cony/R—§; Wide variety of modulation formats; Space Link Extension "SLE" (Fwd CLTU, RAF, & RCF services) With a legacy of more than 50 years of crafting high—quality, reliable space solutions, APL can craft a solution for your ground station requirements. Bill Dove Tony Garcia Station Manager Station Systems Engineer 240—228—3766 Washington, DC 240—228—9535 Washington, DC 443—778—3766 Baltimore, MD 443—778—9535 Baltimore, MD bill.dove@jhuapl.edu JonnsHopking ~*«—*—*®—« APPLIED PHYSICS LABORATORY 11100 Johns Hopkins Rd Laurel MD 20728 240—228—5000 / Washington For more information, contact: 443—778—500 / Baltimore ADaA—2015—0835 http://www.scf.jhuapl.edu 99—1634—°C8


Document Created: 2018-12-04 22:20:47
Document Modified: 2018-12-04 22:20:47
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