Clarification EIRP d

LETTER submitted by Iridium Constellation LLC

Clarification of EIRP

2017-06-09

This document pretains to SES-MOD-20170413-00389 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2017041300389_1236027

LAW OFFICES GOLDBERG, GODLES, WIENER & WRIGHT LLP 1025 CONNECTICUT AVENUE, N.W. SUITE 1000 WASHINGTON, D.C. 20036 HENRY GOLDBERG (202) 429-4900 JOSEPH A. GODLES TELECOPIER: JONATHAN L. WIENER (202) 429-4912 DEVENDRA (“DAVE”) KUMAR e-mail: ________ general@g2w2.com HENRIETTA WRIGHT website: www.g2w2.com THOMAS G. GHERARDI, P.C. COUNSEL ________ THOMAS S. TYCZ* SENIOR POLICY ADVISOR *NOT AN ATTORNEY June 9, 2017 FILED ELECTRONICALLY Ms. Marlene H. Dortch Secretary Federal Communications Commission 445 12th Street, SW Washington, DC 20554 Re: Iridium Satellite LLC, File No. SES-MOD-20170413-00388 Iridium Carrier Services LLC, File No. SES-MOD-20170413-00389 Dear Ms. Dortch: Iridium Satellite LLC and Iridium Carrier Services LLC (collectively, “Iridium”) previously filed the above-referenced applications seeking blanket license modifications that would add authority for next generation maritime mobile earth stations, land mobile earth stations, aeronautical mobile earth stations, and AMS(R)S earth stations.1 Iridium hereby clarifies one aspect of the applications. The maximum EIRP density per carrier values (dBW/4kHz) provided in field E49 of Form 312, Schedule B of the applications were calculated by dividing each maximum EIRP per carrier entry (field E48) by the occupied bandwidth of the carrier and converting the result to a per 4 kHz EIRP density. The occupied bandwidth,2 which is related to spectral occupancy, is typically smaller than the necessary bandwidth,3 1 As stated in the narrative that was submitted, two substantively-identical applications were filed, one of which seeks to modify the blanket license held by Iridium Satellite LLC and the other of which seeks to modify the blanket license held by Iridium Carrier Services LLC. 2 Occupied bandwidth is defined in provision 1.153 of the ITU Radio Regulations. 3 Necessary bandwidth is defined in provision 1.152 of the ITU Radio Regulations.

which is related to performance and is used in the bandwidth portion of the emission designator.4 For each emission designator included in field E47 of Form 312, Schedule B, the table below provides the maximum EIRP per carrier, the occupied bandwidth, and the maximum EIRP density per carrier expressed in dBW/4kHz. Field E47 Field E48 Occupied Field E49 Emission Maximum EIRP Bandwidth Maximum EIRP Designator per Carrier (dBW) (kHz) Density per Carrier (dBW/4kHz) 333KQ7W 14.3 256.4 -3.8 41K7Q7W 11.7 32.1 2.7 41K7Q7W 14.3 32.7 5.2 83K3Q7W 14.5 64.3 2.4 333KQ7W 21.2 260.8 3.1 Please direct any questions concerning this filing to the undersigned. Respectfully submitted, Joseph A. Godles Attorney for Iridium Satellite LLC Iridium Carrier Services LLC 4 ITU Radio Regulations, Appendix 1. GOLDBERG, GODLES, WIENER & WRIGHT


Document Created: 2017-06-09 15:41:43
Document Modified: 2017-06-09 15:41:43
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