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DocumentWINNF-TR-5003 VersionV1.0.028April2020 TERMS, CONDITIONS & NOTICES This document has been prepared by theSpectrum Sharing Committeeto assist The SoftwareDefined Radio Forum Inc. (or its successors or assigns, hereafter “the Forum”). It may be amendedor withdrawn at alater time and it is not binding on any member of the Forum or of theSpectrumSharing Committee. Contributors to this documentthat have submittedcopyrighted materials(the Submission)totheForum for use in this documentretain copyright ownership oftheiroriginal work, while at thesame time granting the Forum a non-exclusive, irrevocable, worldwide, perpetual, royalty-freelicense under the Submitter’s copyrights intheSubmission to reproduce, distribute, publish,display, perform, and create derivative works of the Submission based on that original work forthe purpose of developingthis documentunder the Forum's own copyright. Permission is granted to theForum’sparticipants to copy any portion of this document forlegitimate purposes of the Forum.Copying for monetary gain or for other non-Forum relatedpurposes is prohibited. THIS DOCUMENT IS BEING OFFERED WITHOUT ANY WARRANTY WHATSOEVER,AND IN PARTICULAR, ANY WARRANTY OFNON-INFRINGEMENT IS EXPRESSLYDISCLAIMED.ANY USE OF THIS SPECIFICATION SHALL BE MADE ENTIRELY ATTHE IMPLEMENTER'S OWN RISK, AND NEITHER THE FORUM, NOR ANY OF ITSMEMBERS OR SUBMITTERS, SHALL HAVE ANY LIABILITY WHATSOEVER TO ANYIMPLEMENTEROR THIRD PARTY FOR ANY DAMAGES OF ANY NATUREWHATSOEVER, DIRECTLY OR INDIRECTLY, ARISING FROM THE USE OF THISDOCUMENT. Recipients of this document are requested to submit, with their comments, notification of anyrelevant patent claims or other intellectual propertyrights of which they may be aware that mightbe infringed by any implementation of the specification set forth in this document, and to providesupporting documentation. This document was developed following the Forum's policy on restricted or controlledinformation(Policy 009) to ensure that that the document can be shared openly with other memberorganizationsaround the world. Additional Information on this policy can be found here:http://www.wirelessinnovation.org/page/Policies_and_Procedures Althoughthis document contains no restricted or controlled information,the specificimplementationof concepts contain herein may be controlled under the laws of the country oforigin for thatimplementation. Readers are encouraged, therefore, to consult with a cognizantauthority prior toanyfurther development. Wireless Innovation Forum ™ and SDR Forum ™ are trademarks of the Software Defined RadioForum Inc. Copyright © 2020 The Software Defined Radio Forum IncAll Rights Reserved Table of Contents TERMS, CONDITIONS & NOTICES............................................................................................iTable of Contents............................................................................................................................iiList of Figures................................................................................................................................ivList of Tables...................................................................................................................................vDisclaimer......................................................................................................................................viExecutive Summary......................................................................................................................viiCBRS Incumbent Protections and Encumbrances Overview..........................................................11Overview.....................................................................................................................................12Federal Government Incumbents................................................................................................12.1Summary..........................................................................................................................12.2Description of Federal Government Incumbent Activity................................................22.3Dynamic Protection Areas (DPAs)..................................................................................22.4DPA Neighborhoods........................................................................................................32.5Federal Incumbent Activity Impact on CBSDs: Move List.............................................42.6No Consideration for Impact of Government Radar on CBRS.......................................42.7DPA Activation: How a SAS Learns about Federal Incumbent Operations in a DPA...42.8Finding Information on DPAs.........................................................................................52.9OOB Protections of Port DPAs........................................................................................63Inband FSS Incumbents................................................