Supplemental Interference Analyses

0127-EX-CN-2017 Text Documents

Audacy Corporation

2017-08-07ELS_196357

AUDACY ZERO EXPERIMENTAL MISSION SUPPLEMENTAL INTERFERENCE ANALYSES 1. PFD Limit Compliance Neither Article 21 of the ITU’s Radio Regulations nor Part §25.208 of the Commission’s rules list any power flux density (“PFD”) limits for the 20.18-20.20 GHz downlink band proposed for use for the Audacy Zero mission. The plot below shows the boresight PFD incident on the earth’s surface by both the low- and high-gain downlink antennas on Audacy’s satellite, alongside the ITU and FCC PFD limits for the 19.7 GHz band for comparison. As the plot shows, even the high-gain downlink beams of Audacy’s satellite are roughly 20 dB, or one hundred times, less than the nearest ITU and FCC limits. 2. EPFD Limit Compliance The following equivalent power flux-density (“EPFD”) analyses were performed using ITU- provided EPFD-validation software, which includes a Graphical Interface for Batch Calculations (“GIBC”), Transfinite, and Agenium. Audacy generated space station PFD masks and an earth station EIRP mask to use as inputs to the software. Audacy is prepared to provide all necessary assistance to the Commission in running the ITU-provided EPFD-validation software program and can provide the masks and examination databases upon request. Audacy Audacy delivers anytime & effortless space connectivity, advancing 1 of 5 SpaceConnected humanity to a new age of commerce, exploration and discovery.

EPFD↑ The following plot shows the EPFD↑ produced in the geostationary-satellite orbit by FSS emissions from Audacy’s earth station throughout this mission. The ITU’s EPFD↑ limits as listed in Table 22-2 of Article 22 for the 29.5-30.0 GHz band are also shown. It is clear that the use of Audacy’s earth station for this mission will not be a source of harmful interference into existing or planned geostationary-satellite services in this band. EPFD↓ The following plots show the EPFD↓ produced in at the earth’s surface by FSS emissions from Audacy Zero’s high- and low-gain antennas throughout this mission. For each reference antenna listed by the ITU (70 cm, 90 cm, 2.5 m, and 5 m), the EPFD ↓ resulting from both downlink antennas is plotted alongside the corresponding ITU limits as listed in Article 22 for the 19.7-20.2 GHz band. It is clear that neither downlink antenna used for this mission will be a source of harmful interference into existing or planned geostationary-satellite services in this band. Audacy Audacy delivers anytime & effortless space connectivity, advancing 2 of 5 SpaceConnected humanity to a new age of commerce, exploration and discovery.

EPFD | into 70 cm GSO Rx Ref. Antenna, 1 MHz Ref. Bandwidth, 19.7—20.2 GHz m 7 7 t g 100 % Time EPFD Level Exceeded 0.01 0.0001 —— ITU Limit —— Audacy Zero HGA —— Audacy Zero LGA 0.000001 : : : : : : 220 210 200 —190 —180 170 —160 150 —140 EPFD, dBW/me + 1 MHz] EPFD |. into 90 cm GSO Rx Ref. Antenna, 40 kHz Ref. Bandwidth, 19.7—20.2 GHz 100 + : } % Time EPFD Level Exceeded 0.01 0.0001 —— ITU Limit 0.000001|| —— Audacy Zero HGA —— Audacy Zero LGA 230 220 210 200 —190 —180 170 160 150 EPFD, dB[W/m? + 40 kkz] EPFD | into 90 cm GSO Rx Ref. Antenna, 1 MHz Ref. Bandwidth, 19.7—20.2 GHz 7 m 7 7 t t 100 % Time EPFD Level Exceeded 0.01 0.0001 —— ITU Limit —— Audacy Zero HGA —— Audacy Zero LGA 0.000001 " — —220 210 200 190 —180 170 —160 150 —140 EPFD, dBW/me + 1 MHz] negy en cce

EPFD | into 2.5 m GSO Rx Ref. Antenna, 40 kHz Ref. Bandwidth, 19.7—20.2 GHz a i 7 100 : } © $ 1 1 §$ $ & © oo1 3 2 & & o iR& o.0001 4 # —— ITU Limit 0000001 || — Audacy Zero HGA . | —— Audacy Zero LGA z40 350 300 T80 "Te0 EPFD, dBW/m? + 40 kHz] EPFD | into 2.5 m GSO Rx Ref. Antenna, 1 MHz Ref. Bandwidth, 19.7—20.2 GHz 100 ‘ } } © $ 1 1 §$ $ & © oo1 3 2 & & o 2& o.0001 4 # —— ITU Limit 0000001 || — Audacy Zero HGA . | —— Audacy Zero LGA 320 200 —180 "Teo —140 EPFD, dBW/me + 1 MHz] EPFD |. into 5 m GSO Rx Ref. Antenna, 40 kHz Ref. Bandwidth, 19.7—20.2 GHz 100 u m u 7 t — 1 1 o$ S$ $ & = 0.01 S 8 2 & w 0.0001 o RE # 0,000001 F =— ITU Limit —— Audacy Zero HGA —— Audacy Zero LGA 000000001 : : : : : 240 220 200 —180 160 EPFD, dB[W/m? + 40 kkz] noe n n se e & eecrereg se m se ue —y

Audacy Audacy delivers anytime & effortless space connectivity, advancing 5 of 5 SpaceConnected humanity to a new age of commerce, exploration and discovery.


Document Created: 2017-08-07 15:46:39
Document Modified: 2017-08-07 15:46:39
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