Response to correspondence reference 28855

0829-EX-PL-2014 Text Documents

BlackSky Global, LLC

2015-08-03ELS_165451

BlackSky Global, LLC 3415 S. 116th Street, Suite 123 Tukwila, WA 98168 August 3, 2015 Subject: Re: file number 0829-EX-PL-2014, correspondence reference number 28855 Dear Ms. Nguyen, This information is in response the FCC’s July 27, 2015 request for information in regards to the above-referenced application number. This document contains responses to each of the questions contained in that email. Please let me know if you have additional questions. Sincerely, John Springmann, Ph.D. Lead Systems Engineer jspringmann@blacksky.com Question 1: “Information of satellite transmitter antenna including gain, beamwidth, azimuthal range, polarization.” Antenna Gain Beamwidth Azimuthal Range1 Polarization UHF whip (Tx & 3 dBi 180° (nearly-omni) Body-fixed Linear Rx) X-band patch (Tx) 15 dBi 18° Body-fixed Right-hand circular Question 2: “Information of earth station receiver antenna including gain, beamwidth, azimuthal range, elevation above mean sea level (m), minimum angle of elevation and antenna height above terrain (m).” Location Gain Beamwidth Azimuthal Elevation Min Height Range AMSL (m) Elevation above angle2 (deg) terrain3 (m) Tukwila, WA 19 dBi UHF: 30° UHF: 0-360° 15.9 0° UHF: 10 Redmond, WA X: 33 dBi X: 1° X: 0-360° 33 0° S/X: 15.2 Fairbanks, AK UHF: 19 dBi UHF: 30° UHF: 0-360° 144 0° UHF: 7 X: 48 dBi X: 1° X: 0-360° S/X: 4 Prudhoe Bay, AK UHF: 19 dBi UHF: 30° UHF: 0-360° 9.1 0° UHF: 3 X: 33 dBi X: 1° X: 0-360° S/X: 2 1 Body-fixed means that the antenna is not steerable; it is rigidly attached to the body of the spacecraft. The entire spacecraft will slew such that the antennas are pointing at the ground station during a contact pass. 2 0° is the physical minimum. We can limit the minimum elevation for transmission, if necessary. 3 Some locations are approximate – final designs in progress.

Truth or UHF: 19 dBi UHF: 30° UHF: 0-360° 1415 0° UHF: 3 Consequences, X: 33 dBi X: 1° X: 0-360° S/X: 2 New Mexico Southland, New UHF: 19 dBi UHF: 30° UHF: 0-360° 11 0° UHF: 3 Zealand X: 33 dBi X: 1° X: 0-360° S/X: 2


Document Created: 2015-08-03 10:47:46
Document Modified: 2015-08-03 10:47:46
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