关于1695 1710mhz和1755 1780mhz aws 3频谱的通知大会

The Honorable JohnD.RockefellerIVChairmanCommitteeonCommerce, Science, and TransportationUnited States SenateWashington, DC20510 RE: NotificationPursuantto 47 U.S.C.§923(j)(2) Regarding the1695-1710MHz and1755-1780 MHz Spectrum Bands Dear Mr. Chaitman: Inaccordance with Section 113(j)(2)ofthe National Telecommunications andInfmmation Administration (NTIA) Organization Act, as amended, NTIA hereby providesnotificationofits determination that relocationofcet1ain federal entities from the 1695-1710MHz and 1755-1780 MHz spectrum bands isnotfeasible becauseoftechnical or costconstraints.1In evaluating these bands for possible reallocation for exclusive non-federal use orshared use, NTIA initially gave priority to options involving reallocation for exclusive non-federal use, but determined that teclmical or cost constraints (or both) required it to select optionsinvolving shareduse?This notification provides details on the specific technicalorcostconstraintsonwhich NTIA based these determinations. 1695-1710MHzBand Federal government entities operate meteorological satellite systems in the 1695-1710MHzband. In preparing the October2010Fast Track Report,3NTIA, in consultation with theOfficeofManagement and Budget(OMB)and the other federal agenciesonthePolicyandPlansSteering Group(PPSG),4evaluated the federal systems operating in the 1695-1710 MHz band Inevaluating a bandoffi·equenciesfor possible reallocation for exclusive non-Federal useorshared use,theNTIAshall give priority to options involving reallocationofthe band for exclusive non-Federal use andshall choose options involving shared use only when it detennines,inconsultation with the DirectoroftheOfficeofManagementand Budget, that relocationofa Federal entity from the band is not feasible becauseoftechnicalorcost constraints. 3SeeNTIA,AnAssessmentofthe Near-Term ViabilityofAccommodating Wireless Broadband Systems in the 1675-1710MHz,1755-1780MHz,3500-3650MHz,and4200-4220MHz,4380-4400MHz Bands(Oct.2010)(Fast TrackReport);seealsoU.S.Dept.ofCommerce,Identificationof15 MegahertzofSpectrum Between 1675andI710MHzforReallocationfromFederal Use to Non-Federal Use Pursuant to Section6401(a)ofthe MiddleClassTaxReliefandJobCreationActof20/2(Feb. 2013). 4SeeWhite House,Memorandumforthe HeadsofExecutive DepartmentsandAgencies: Unleashing the WirelessBroadband Revolutionat§I(c) (rei. June 28,2010),published at75 Fed. Reg. 38387 (July 1,2010). The Honorable JohnD.RockefellerIVPage 2 and determined that relocationofthese systems would not be technically feasibleorcosteffective based on operational needs and life cyclesofthe satellites in orbit. The meteorologicalsatellites and associated earth station facilities deployed by the federal agencies will continue tooperate in this band for many years and it is not possible to change the frequenciesonwhich theyoperate.Foreign countries also operate satellites in this bandinaccordance with the worldwideallocation for the meteorological-satellite service (space-to-Earth) and the United StatesGovernment and other entities download their data.Aslong as the satellites continue to operate,key satellite receivers must be protected to receive and disseminate this critical data, which isused daily for weather prediction. These predictions are broadcast throughout the United Statesover television and radio and provide information critical to protect life and property. Prior to enactmentofthe above-referenced statutory provision, NTIA proposed that theFederal Communications Commission (FCC) reallocate the1695-1710MHzband toaccommodate new commercial broadband wireless servicesona shared basis, subject to certaincontingencies and assumptions. NTIA recommended that the FCC implement geographicexclusion zones to protect federal operations from harmful interference from new wirelessbroadband operations. Industry commenters subsequently urgedfu11herevaluation that couldpotentially reduce the impactofsuch exclusion zones to make the band more attractive anduseful for wireless broadband operations.5In that regard, NTIA tasked a working groupofitsCommerce Spectrum Management Advisory Committee (CSMAC) to evaluate improvedmodelingofcommercial wireless networks and possible reductionofthe exclusion zones. TheCSMAC working group studied the potential interference from new commercial systems intometeorological-satellite earth station receivers and, basedonits studies, recommendedestablishmentofmore flexible protection zones around earth stations within which a commercialsystem could operate after successful coordination.6As a result, the potential impactonthepopulation within such zones would be substantially reduced.7 The CSMAC working group also recommended that NTIA consider the feasibilityofmoving earth stations away from the most heavily populated areasorusing remote receivelocations to maximize commercial useofthe band.8Federal usersonthe working group notedthat there were significant technical and cost challenges to relocating receiv