Exhibit 2 Rev B THEA Technical

0176-EX-CN-2018 Text Documents

SpaceQuest, Ltd.

2018-08-16ELS_214273

THEA Satellite Exhibit 2 File #: 0176-EX-CN-2018 Technical Information February 27, 2018 May 9, 2018 (Rev A) August 16, 2018 (Rev B) Submitted By SpaceQuest, Ltd. 3554 Chain Bridge Road Suite 400 Fairfax, VA 22030

FCC Form 442 Exhibit 2 File #:0176-EX-CN-2018 Technical Information Table of Contents 1 Ownership, Operations and Construction. ..................................................................... 3 2 Orbital Requirements. ................................................................................................... 3 3 Service Area. ................................................................................................................. 3 4 Satellite Payload. .......................................................................................................... 3 5 Principle Specifications. ................................................................................................. 4 6 System Block Diagram. .................................................................................................. 4 7 Telemetry, Tracking & Command and Payload Operations ............................................. 5 8 Radio Equipment........................................................................................................... 6 8.1 UHF Transceiver ................................................................................................................. 6 8.1.1 Downlink: UHF Transmit .......................................................................................................... 6 8.1.2 Uplink: UHF Receive ................................................................................................................. 6 8.2 S-Band Transceiver: ........................................................................................................... 6 8.2.1 Downlink: S-Band Transmit...................................................................................................... 6 8.2.2 Uplink: S-Band Receive ............................................................................................................ 6 8.3 Wideband Receiver: ........................................................................................................... 7 9 Antenna Systems .......................................................................................................... 7 10 Satellite Link Budgets .................................................................................................... 8 11 Interference Analysis................................................................................................... 11 11.1 400.50-400.65 MHz (TT&C Downlink). .............................................................................. 11 11.2 399.90 -400.05 MHz (TT&C Uplink) ................................................................................... 11 11.3 2200-2202MHz (Payload Downlink) .................................................................................. 11 11.4 2045-2046 MHz (Payload Uplink) ...................................................................................... 11 12 Power Flux Density Analysis ........................................................................................ 12 12.1 400.50-400.65 MHz (TT&C Downlink) ............................................................................... 12 12.2 2200-2202 MHz (Payload Downlink) ................................................................................. 12 13 Space Station Antenna Radiation Patterns ................................................................... 13 13.1 S-Band: THEA Space Station Transmit/Receive Antenna .................................................... 13 13.2 UHF: THEA Space Station Transmit/Receive Antenna ........................................................ 13 13.3 Broadband: THEA Space Station Receive Antenna ............................................................. 14 13.4 Summary of THEA Antenna Characteristics ....................................................................... 14 14 Earth Station Antenna Radiation Patterns.................................................................... 15 14.1 UHF Antennas in Fairfax, VA, North Pole, AK and Naalehu, HI and Limestone, ME ............. 15 14.2 S-Band Earth Station Antenna in North Pole Alaska and Limestone, Maine. ....................... 16 15 Stop Buzzer POC .......................................................................................................... 16 Exhibit 2 SpaceQuest PAGE 1

FCC Form 442 Exhibit 2 File #:0176-EX-CN-2018 Technical Information List of Figures Figure 1 Orbital Parameters............................................................................................................ 3 Figure 2 System Block Diagram....................................................................................................... 4 Figure 3 Isometric view of deployed configuration ........................................................................ 5 Figure 4 Summary of THEA Transmitter and Receiver parameters................................................ 7 Figure 5 Antenna Frequency Registration ..................................................................................... 7 Figure 6 Frequency Emissions Registration .................................................................................... 8 Figure 7 Satellite UHF Uplink Budget .............................................................................................. 8 Figure 8 Satellite UHF Downlink Budget ......................................................................................... 9 Figure 9 Satellite S-Band Uplink Budget ......................................................................................... 9 Figure 10 Satellite S-Band Downlink Budget ................................................................................ 10 Figure 13 Satellite UHF Link Margins Vs. Elevation Angle ............................................................ 10 Figure 14 Satellite S-Band Link Margins Vs. Elevation Angle ........................................................ 10 Figure 15 PFD at the Surface of the Earth for the UHF Transmitter Downlink ............................ 12 Figure 16 PFD at the Surface of the Earth for the S-Band Transmitter Downlink ........................ 12 Figure 17 S-Band Satellite Transmit/Receive Antenna Radiation Pattern ................................... 13 Figure 18 UHF Satellite Transmit/Receive Antenna Radiation Pattern. ....................................... 13 Figure 20 Flexitech Broadband Receive Antenna and Radiation Pattern. ................................... 14 Figure 21 THEA Antenna Characteristics ...................................................................................... 15 Figure 22 UHF Earth Station Antenna Radiation Pattern. ............................................................ 15 Figure 24 S-Band Earth Station Antenna Radiation Pattern. ........................................................ 16 Exhibit 2 SpaceQuest PAGE 2

FCC Form 442 Exhibit 2 File #:0176-EX-CN-2018 Technical Information 1 Ownership, Operations and Construction. SpaceQuest, Ltd. is a small business concern, and the owner, manufacturer and operator of the THEA satellite. SpaceQuest has selected Spaceflight Industries of Seattle, Washington as the launch provider. THEA will be launched on a SpaceX Falcon 9 launch vehicle from Vandenberg, AFB in California (geographic coordinates 34.5762°N; 4.2803°W) in November 2018. Pursuant to Part 5 §5.64 of the Commission’s Rules, construction of the proposed experimental satellite and associated facilities has begun prior to the Commission’s grant of an authorization. This is necessary given the nature of satellite construction and technical requirements over long lead times. Such construction is entirely at SpaceQuest’s risk without any assurances that its proposed experiment will be subsequently approved. • Space Station Name: THEA • THEA Estimated Construction Completion Date: August 2018 • Spaceflight Final Certification of Licenses (Go/NoGo): September 12, 2018 • Purpose: Experimental, non-Common Carrier basis • Orbital Type: NGSO 2 Orbital Requirements. The satellite is designed to operate in a circular sun-synchronous orbit as described in Figure 1. The satellites are based on COTS technology that allows for small, lightweight and low-cost spacecraft. THEA Value Total Number of Orbital Planes: 1 Celestial Reference Body: Earth Inclination Angle (degrees): 97.52 Orbital Period (seconds) 5760 LTAN 22:30 Apogee 575 km Perigee 575 km Figure 1 Orbital Parameters 3 Service Area. Worldwide 4 Satellite Payload. The primary satellite mission of THEA is to test an experimental spectrum survey payload developed by Aurora Insight, a US company. The Aurora payload is an experiment to demonstrate and validate the ability of its flight computer firmware to monitor, process and generate relevant measurements of the spectral environment in the 1.35 to 8.0 GHz Exhibit 2 SpaceQuest PAGE 3

FCC Form 442 Exhibit 2 File #:0176-EX-CN-2018 Technical Information band using a novel wideband antenna developed by Flexitech Aerospace. The THEA UHF frequency assignment will be used for satellite telemetry, command and control. The S- Band assignment will be used to download selected mission data from the Aurora payload and upload new computer firmware to improve performance and correct any software deficiencies. 5 Principle Specifications. THEA is a 3U CubeSat whose outside envelope measures 100 x 100 x 340.5mm. The satellite’s total mass is less than 5 kg. It has four deployable solar arrays, which will deploy from the short edges of the spacecraft. The LiIon battery consists of eight cells wired as 4- series and 2 parallel. The expected mission lifetime of the satellite is 5 years in a 575-km orbit due to battery life and deorbit analysis. SpaceQuest will own and operate the experimental CubeSat throughout its mission lifetime. The THEA satellite will never be sold or transferred to another party. 6 System Block Diagram. Figure 2 below shows the major components of the spacecraft and their interfaces. The flight computer is responsible for TT&C and payload scheduling. The attitude determination and control system orients the solar panels to the sun, except when the satellite is re-oriented to communicate with a ground station. Two Software Defined Radios are shown below, one is for an S-Band transceiver and the other is for the Aurora experimental wideband receiver. The deployed array and antenna configuration is shown in Figure 3. Figure 2 System Block Diagram Exhibit 2 SpaceQuest PAGE 4

FCC Form 442 Exhibit 2 File #:0176-EX-CN-2018 Technical Information Figure 3 Isometric view of deployed configuration This configuration allows for two VHF and two UHF monopole antennas deployed from the body of the spacecraft. One UHF antenna is used for TT&C communication. The second UHF antenna is grounded. 7 Telemetry, Tracking & Command and Payload Operations The space-to-Earth downlink frequency band of 400.50-400.65 MHz and the Earth-to-space uplink frequency band of 399.90-400.05 MHz for TT&C communications will communicate with SpaceQuest’s Earth stations in Fairfax, Virginia, Naalehu, Hawaii, North Pole, Alaska, and Limestone, Maine. The SpaceQuest TT&C Earth stations will also have the capability to uplink executive commands to the backdoor command receiver at 145.92 MHz. The space-to-Earth frequency band of 2200-2202 MHz will be used to downlink experimental test data to Earth Stations in Limestone, Maine and Esrange, Sweden. The Earth-to-space uplink frequency band of 2045-2046 MHz from Limestone, Maine and Esrange, Sweden will be used occasionally to upload new firmware to the THEA payload. Exhibit 2 SpaceQuest PAGE 5

FCC Form 442 Exhibit 2 File #:0176-EX-CN-2018 Technical Information 8 Radio Equipment. 8.1 UHF Transceiver • NanoComm A-100 UHF Transceiver manufactured by GomSpace. • Primary transceiver capability for telecommand, telemetry, and schedule uploads. • The transceiver can operate between 390 and 406 MHz at 9600 bps. modulation. 8.1.1 Downlink: UHF Transmit • Operating Frequency 400.60 MHz • Output Power: 3 Watts • EIRP: 3.3 dBW • Channels: 400.50-400.65 MHz • Frequency Deviation: 16 kHz 8.1.2 Uplink: UHF Receive • Operating Frequency 399.95 MHz • Sensitivity: -110 dBm • Channels: 399.90-400.05 MHz • Frequency Stability: ±10 ppm. 8.2 S-Band Transceiver: • GomSpace TR600 S-Band SDR Transceiver • Primary transceiver for mission data and commands to primary payload. • Space-to-Earth downlink operates from 2200 to 2202MHz • Earth-to-space uplink operated from 2045 to 2046 MHz • QPSK modulation. 8.2.1 Downlink: S-Band Transmit • Requested Frequency Band: 1MHz in the 2200-2202 MHz band • Output Power: 1 Watts • Peak antenna Gain: 7 dBi • EIRP: 3.3 dBW • Data Rate: 1,500 kbps • Channels: Tunable SDR Transmitter from 2200-2290 MHz • Necessary Bandwidth: 2,000 kHz. 8.2.2 Uplink: S-Band Receive • Operating Frequency: 1MHz in the 2045-2046 MHz band • Sensitivity: -100 dBm • Data Rate: 700 kbps • Channels: Tunable SDR Receiver from 2025-2110 MHz • Frequency Stability: ±10 ppm Exhibit 2 SpaceQuest PAGE 6

FCC Form 442 Exhibit 2 File #:0176-EX-CN-2018 Technical Information 8.3 Wideband Receiver: • Aurora RADS-200 (Reconfigurable Advanced Digital Sensor) • Uses broadband receive antenna manufactured by Flexitech Aerospace • Operating frequency: 1.35-7.075 GHz • Maximum instantaneous bandwidth: 56 MHz • Sensitivity: -110 dBm A summary of the THEA Transmitter and Receiver parameters are provided in Figure 4. Description Transmitter 1 Transmitter 2 Receiver 1 Receiver 2 Receiver 3 Radio Name UTX SBTX URX SBRX WBRX Carrier Frequency, MHz 400.6 2201 399.95 2045.5 NA 3 dB Bandwidth, MHz 0.015 1.5 0.015 0.75 NA Necessary Bandwidth, MHz 0.035 2.0 0.035 1.0 NA 20 dB Bandwidth, MHz 0.020 1.75 NA NA NA 60 dB Bandwidth, MHz 0.035 2.0 NA NA NA Receiver Sensitivity, dBm NA NA -110 -100 -110 Antenna Gain, dBi 0.0 7.0 0.0 7.0 3.0 Modulation Type GMSK QPSK GMSK QPSK NA Total Data Rate (KHz) 9.6 1500 9.6 700 NA Receiver Span (MHz) NA NA 0.15 1.0 5.725 EIRP, dBW 3.3 3.4 NA NA NA Antenna Polarization Linear Circular Linear Circular Circular Figure 4 Summary of THEA Transmitter and Receiver parameters. 9 Antenna Systems The transmit antenna parameters for the THEA Satellite are provided in Figure 5 and Figure 6. Lower Upper Freq. Power Output ERP Frequency Station Power Mean/Peak Frequency Frequency Units Units Power/ERP Units Tolerance Class 2200 2202 MHz 1.0 W 3.4 dBW Peak +/-10 ppm Mobile 400.50 400.65 MHz 3.0 W 3.3 dBW Peak +/-10 ppm Mobile Figure 5 Antenna Frequency Registration Lower Frequency Upper Frequency Units Emission Modulating Signal Necessary Bandwidth 2200 2202 MHz 2M00G1D QPSK 2,000 KHz 400.50 400.65 MHz 25K0F1D GMSK 35KHz Exhibit 2 SpaceQuest PAGE 7

FCC Form 442 Exhibit 2 File #:0176-EX-CN-2018 Technical Information Figure 6 Frequency Emissions Registration 10 Satellite Link Budgets The UHF uplink budget is shown in Figure 7. Figure 8 shows the UHF downlink budget. Figure 7 Satellite UHF Uplink Budget Exhibit 2 SpaceQuest PAGE 8

FCC Form 442 Exhibit 2 File #:0176-EX-CN-2018 Technical Information Figure 8 Satellite UHF Downlink Budget The S-Band uplink budget is shown in Figure 9. Figure 10 shows the UHF downlink budget. Figure 9 Satellite S-Band Uplink Budget Exhibit 2 SpaceQuest PAGE 9

FCC Form 442 Exhibit 2 File #:0176-EX-CN-2018 Technical Information Figure 10 Satellite S-Band Downlink Budget The satellite link margins for the UHF and S-Band radios are plotted in Figure 11and Figure 12. UHF Link Margins 35 Down link Margin 30 Uplink Margin Link Margin (dB) 25 20 15 Command & Telemetry Links 400 MHz at 9.6 kbps 10 10 Watts Uplink Power 3 Watt Sat Transmit Power 0.0 dBi Sat Antenna Gain 5 13.5 Grounds Antenna Gain 0 0 15 30 45 60 75 90 Elevation Angle (Degrees) Figure 11 Satellite UHF Link Margins Vs. Elevation Angle S-Band Link Margins 30 UPLINK MA RGIN (dB) DOWNLINK MARGIN ( dB) 25 Link Margin (dB) 20 15 Mission Data Links 10 2045 and 2201 MHz at 700 Kbps 10 Watts Uplink Power 1 Watt Sat Transmit Power 7.0 dBi Sat Antenna Gain 5 40 dBi Ground Antenna Gain 575 km Altitude 0 0 15 30 45 60 75 90 Elevation Angle (Degrees) Figure 12 Satellite S-Band Link Margins Vs. Elevation Angle Exhibit 2 SpaceQuest PAGE 10

FCC Form 442 Exhibit 2 File #:0176-EX-CN-2018 Technical Information 11 Interference Analysis 11.1 400.50-400.65 MHz (TT&C Downlink). Interference with U.S. federal and commercial assignments in the 400.50-400.65 MHz band is unlikely as transmissions will only occur while over the SpaceQuest TT&C ground stations. The 400.50 to 400.65 MHz space-to-Earth band is allocated for UHF Little LEO data services and has been used experimentally by SpaceQuest for the past 5 years 11.2 399.90 -400.05 MHz (TT&C Uplink) Interference with U.S. federal and commercial assignments in the 399.00-400.05 MHz band is unlikely as uplink transmissions will only occur while over the SpaceQuest TT&C ground stations. The 399.0-400.05 MHz Earth-to-space band is allocated for UHF Little LEO data services and has been used by SpaceQuest experimentally for the past 5 years. 11.3 2200-2202MHz (Payload Downlink) The GomSpaceSR2000 S-Band SDR Transmitter and ANT2000 Antenna is designed to operate in the 2200-2290 MHz band. In order to avoid interference with the U.S. Federal allocation S-Band downlink transmissions will operate at 2201 MHz band from Esrange, Sweden and LimeStone, Maine where . The S-Band downlink carrier frequency of 2201 MHz will be used for the THEA satellite and coordinated with other authorized users of the band. S-Band operations will occur periodically at either LimeStone, Maine or Esrange, Sweden. Transmissions will be restricted as necessary to eliminate interference with other users of the band. 11.4 2045-2046 MHz (Payload Uplink) SpaceQuest’s S-Band satellite receiver and antenna system is designed to operate in the 2025-2110 MHz band. The S-Band uplink carrier frequency of 2045.5 MHz will be used for THEA and coordinated with other authorized users of the band. The 2045-2046 MHz band was chosen for the THEA experimental license because it can be supported with the chosen S-Band radio equipment – the GomSpaceSR2000 S-Band SDR Receiver and ANT2000 Antenna. Infrequent S-Band uplink transmissions from Limestone, Maine or Esrange, Sweden, will be used to load new firmware and to send confirmations of successful data packet downloads. Exhibit 2 SpaceQuest PAGE 11

FCC Form 442 Exhibit 2 File #:0176-EX-CN-2018 Technical Information 12 Power Flux Density Analysis 12.1 400.50-400.65 MHz (TT&C Downlink) The Power Flux Density for the UHF downlink is within the ITU limits as shown in Figure 13. UHF Power Flux Density Vs. Elevation Angle -120 Power Flux Density (dBW/m2/4kHz) -125 -130 -135 ITU Power Flux Density Limits Power Flux Density (dBW/m2/4kHz) -140 -145 0 10 20 30 40 50 60 70 80 90 Elevation Angle (deg) Figure 13 PFD at the Surface of the Earth for the UHF Transmitter Downlink 12.2 2200-2202 MHz (Payload Downlink) The PFD for the S-Band downlink satisfies the ITU PFD limits as shown in Figure 14. S-Band Power Flux Density Vs. Elevation Angle -140.0 -142.0 -144.0 PFD (dBW/m^2/4 kHz) -146.0 -148.0 -150.0 -152.0 -154.0 ITU Power Flux Density Limits -156.0 Power Flux Density (dBW/m2/4kHz) -158.0 -160.0 0 10 20 30 40 50 60 70 80 90 Elevation Angel (Deg) Figure 14 PFD at the Surface of the Earth for the S-Band Transmitter Downlink Exhibit 2 SpaceQuest PAGE 12

FCC Form 442 Exhibit 2 File #:0176-EX-CN-2018 Technical Information 13 Space Station Antenna Radiation Patterns 13.1 S-Band: THEA Space Station Transmit/Receive Antenna The GomSpace NanoCom ANT2150 side-mounted S-Band Patch Antenna is used to downlink the THEA mission data. This circularly-polarized antenna incorporates an LNA designed to receive in the 2025-2110 MHz frequency band, and a Power Amplifier designed to transmit in the 2200-2290 MHz frequency band. The radiation pattern is shown in Figure 15. 0 345 10 15 330 5 30 315 0 45 -5 300 -10 60 -15 285 -20 75 -25 270 -30 90 255 105 240 120 225 135 210 150 195 165 180 Figure 15 S-Band Satellite Transmit/Receive Antenna Radiation Pattern 13.2 UHF: THEA Space Station Transmit/Receive Antenna An ISIS Deployable Omnidirectional UHF Monopole Antenna System is used to uplink and downlink TT&C data. It has a 0 dBi average gain and a radiation pattern shown in Figure 16. Figure 16 UHF Satellite Transmit/Receive Antenna Radiation Pattern. Exhibit 2 SpaceQuest PAGE 13

FCC Form 442 Exhibit 2 File #:0176-EX-CN-2018 Technical Information 13.3 Broadband: THEA Space Station Receive Antenna A novel wideband antenna from Flexitech Aerospace is mounted in the “Tuna Can” of the THEA Cubesat. This receive-only antenna is used to capture RF spectrum in the frequency band from 1.35-7.075 GHz. The antenna pattern is a hemispheric 120 cone (60) with a peak gain at the center of the coverage envelope and a slow roll off to the -3dB point. A photo of Flexitech broadband antenna and its radiation pattern are shown in Figure 17. Figure 17 Flexitech Broadband Receive Antenna and Radiation Pattern. 13.4 Summary of THEA Antenna Characteristics Figure 18 lists the antenna parameters for the three THEA antennas. Antenna Parameter S-Band UHF Wideband Antenna Frequency Range: 2025-2290 MHz 399.9-400.6 MHz 1.35-7.075 GHZ Bandwidth Required: 2,000 KHz 150 KHz N/A Emission Designator: 2M00G1D 25K0F1D N/A Number of Channels: 1 1 Multiple Space Station Class: EH ET EH Beam Name: SBTX and SBRX UTX and URX WBRX Emission/Receive E/R E/R R Max ISO. Gain 7.0 dBi 0.0 dBi 3.0 dB Antenna Type: Patch Monopole Cavity Backed Spiral Polarization: Circular Linear Circular Peak Power: 1.0 Watts 3.0 Watts Receive Only Antenna Pattern: See Figure 15 See Figure 16 See Figure 17 Link Margin: See Figure 12 See Figure 11 Receive Only Within ITU limits. Within ITU limits. Power Flux Density: Receive Only See Figure 14 See Figure 13 Exhibit 2 SpaceQuest PAGE 14

FCC Form 442 Exhibit 2 File #:0176-EX-CN-2018 Technical Information Figure 18 THEA Antenna Characteristics 14 Earth Station Antenna Radiation Patterns Antenna patterns for SpaceQuest’s UHF Earth Stations is shown in Figure 19. 14.1 UHF Antennas in Fairfax, VA, North Pole, AK and Naalehu, HI and Limestone, ME Figure 19 UHF Earth Station Antenna Radiation Pattern. Exhibit 2 SpaceQuest PAGE 15

FCC Form 442 Exhibit 2 File #:0176-EX-CN-2018 Technical Information 14.2 S-Band Earth Station Antenna in North Pole Alaska and Limestone, Maine. SpaceQuest’s S-Band antennas in Limestone, Maine and Esrange, Sweden are for downloading the data captured by the Aurora payload. The Esrange S-Band antenna will be used to upload new firmware to the satellite. An S-Band radiation pattern for these antennas is shown in Figure 20 Vertical Pattern Horizontal Pattern Figure 20 S-Band Earth Station Antenna Radiation Pattern. 15 Stop Buzzer POC The 24-hour SpaceQuest contact for interference issues is provided below: Name: Glenn Richardson Email: glenn@spacequest.com Tel: 703-424-7806 Exhibit 2 SpaceQuest PAGE 16


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Document Modified: 2018-08-16 16:59:06
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