Ex Parte Letter 17-2

Ex PARTE PRESENTATION NOTIFICATION LETTER submitted by DIRECTV Enterprises, LLC

Ex Parte Notification

2008-12-08

This document pretains to SAT-AMD-20080114-00014 for Amended Filing on a Satellite Space Stations filing.

IBFS_SATAMD2008011400014_681611

HARR'S, 1200 EIGHTEENTH STREET, NW WASHINGTON, DC 20036 WILTSHIRE & Tel 202.730,1300 rAx202.730.1301 EJn WWW.HARRISWILTSHIRE.COM ATTORNEYS AT LAW December 8, 2008 BY ELECTRONIC FILING Marlene H. Dortch Office of the Secretary Federal Communications Commission 445 12" Street, S.W. Washington, D.C. 20554 Re: DIRECTY Enterprises, LLC, FCC File No. SAT—AMD—20080114—00014 Dear Ms. Dortch: This is to inform you that Stacy Fuller, David Pattillo, and undersigned counsel representing DIRECTV Enterprises, LLC ("DIRECTV") met on December 5, 2008 with Robert Nelson, Cassandra Thomas, Fern Jarmulnek, Andrea Kelly, Kathyrn Medley, Chip Fleming, and Rockie Patterson of the Commission‘s International Bureau to discuss the above referenced 17/24 GHz BSS application. The content of DIRECTYV‘s presentation is set forth in the attached materials, which were provided to the staff at the meeting. Sincerely yours, . William M. Wiltshire Counselfor DIRECTVY Enterprises, LLC Attachment ce: Robert Nelson Cassandra Thomas Fern Jarmulnek Andrea Kelly Kathyrn Medley Chip Fleming Rockie Patterson

DIRECTV Enterprises, LLC ("DIRECTV") is currently seeking authority to launch and operate 17/24 GHz BSS satellite systems at five orbital locations, including the DIRECTV RB—2 satellite at the nominal 103° W.L. location.‘ In each of those applications, DIRECTV has demonstrated that its proposed system will comply with the limitations on power flux—density ("PFD") at the Earth‘s surface imposed in Section 25.208(w) of the Commission‘s rules, as adjusted for any offset from the "on—grid" locations established by the Commission. In a recent application for authority to serve the U.S. market from a 17/24 GHz BSS system licensed by the Netherlands at 103.15° W.L.," Spectrum Five LLC ("Spectrum Five") has criticized DIRECTV‘s methodology for calculating PFD levels. Although Spectrum Five failed to file timely comments in connection with DIRECTV‘s actual license application to raise this issue, we nonetheless wish to address its arguments to ensure that the Commission is not misled by them. Spectrum Five asserts that, because Section 25.208(w) specifies that PFD limits are to be calculated under "clear sky" conditions, such a calculation is limited to free space conditions and "without doubt, do[es] not include weather variable effects due to cloud cover and increased humidity levels in the atmosphere."" Because DIRECTV included not only free space path losses but also other factors in its PFD calculation, Spectrum Five argues that DIRECTV has resorted to "impermissible reliance on atmospheric losses to bring its proposed PFD within prescribed limits."" While Spectrum Five may have no doubt that the term "clear sky" means the same thing as "Free space," it cites no Commission rule or precedent for this proposition. In fact, neither term is specifically defined in the Commission‘s rules." More importantly, the structure of Section 25.208 itself demonstrates that the two terms must be read to have different meanings. Section 25.208 establishes PFD limits for satellite systems operating in a number of bands. The rule has 22 subsections, denoted as (a) through (w). Of those 22 subsections, 19 specifically state that the limits relate to the PFD that would be obtained under free space propagation conditions. In other words, subsections (a), (b), (d), (g), (h), ). ) (K), (1, (m), (n), (0), (p). (q), (1). (s), (t), (u), and (v) specifically call for the assumption of free space conditions — while subsection (w) is the only subsection that \ See FCC File No. SAT—AMD—20080114—00014 ("DIRECTV RB—2 Application"). * See FCC File No. SAT—LOI—20081119—00217 ("$5 103W LOT"). 3 Id. at 9. * Id. at 8. °_ Arguably, the term "free space" could be understood to be "defined" in Section 25.208(q)(1), which provides that a particular PFD limit is to be determined with reference to "assumed free space conditions (that is, when no allowance is made for propagation impairments such as rain fade)." There is no similar provision related to the term "clear sky."

refers only to "clear sky" conditions." It is well established that "[wJhen Congress uses explicit language in one part of a statute to cover a particular situation and then uses different language in another part of the same statute, a strong inference arises that the two provisions do not mean the same thing.”7 This is especially true where the disparate terms "are only lines away from each other.""* Applying the same principle of construction here, one can only conclude that the Commission intended that "clear sky" should mean something other than "free space." Accordingly, the only question is what additional factors are appropriate for inclusion in a clear sky calculation in addition to those inherent in free space conditions. In its applications, DIRECTV used figures from its link budgets to calculate PFD levels. The "clear sky" figures in those link budgets include line items for free space loss, gaseous, cloud, and scintillation." The use of these factors reflects a conservative approach to link budgets, recognizing the critical importance of assessing atmospheric losses in evaluating satellite system performance.‘" Signal absorption in atmospheric gas affects transmissions to the Earth‘s surface for frequencies above 10 GHz" —a phenomenon that occurs under all weather conditions, including "clear sky." Similarly, scintillation is a clear—air phenomenon — and one that even Spectrum Five does not appear to contest. However, upon further consideration, DIRECTV has concluded that one of the three additional factors used in its link budgets — clouds — would not be appropriate for use in a calculation based on "clear sky" conditions. Two other twosubsections ((c) and (¢)) are silent on this issue, while a third (subsection (f)) has been reserved. Persinger v. Islamic Republic ofIran, 729 F.2d 835, 843 (D.C. Cir. 1984). See also KP Permanent Make—Up, Inc. v. Lasting Impression 1, Inc., 543 U.S. 111, 118 (2004) ("[WJhere Congress includes particular language in one section ofa statute but omits it in another section of the same Act, it is generally presumed that Congress acts intentionally and purposely in the disparate inclusion or exclusion.‘" (citation omitted)). 8 Board of Trustees v. BES Services, Inc., 469 F.3d 369, 372—73 (4" Cir. 2006). DIRECTV RB—2 Application, Narrative, App. A. The link budgets also include a column showing the effects of losses due to rain. _ The importance of these factors is reflected by the adoption of a series of International Telecommunication Union Recommendations on the subject. See, e.g., Rec. ITU—R P.618—9 ("Propagation data and prediction methods required for the design of Earth—space telecommunication systems") (citing related and supporting ITU—R Recommendations). As highlighted in these ITU—R Recommendations, accounting for propagation impairments (including absorption in atmospheric gases) is particularly important for systems operating at frequencies above 10 GHz, which are more susceptible to such impairments. 4 See, e.g, id., Seo. 2.1 (discussing attenuation due to atmospheric gases). * See, e.g., id Sec. 2.3 (discussing other "clear—air effects," including scintillation); $5 103W LOI at 8—9 (discussing DIRECTV‘s use oflosses for gaseous effects and cloud effects, but not scintillation effects).

Yet, even adjusting the PFD calculation in this manner, DIRECTV RB—2 would still comply with the limitations established in Section 25.208(w). The maximum PFD allowed under that rule is —115 dBW/m*/MHz. Since DIRECTV proposes to operate at a 0.175° offset from the "on grid" 103.0° W.L. location, it must decrease power by 0.49 dB to account for the decreased discrimination from the nearest adjacent "on grid" location — establishing a new maximum of —115.49 dBW/m*/MHz. In its application, DIRECTV calculated the maximum PFD on the Earth‘s surface from DIRECTV RB—2 as: Max EIRP/channel minus spreading loss in direction of max gain minus atmospheric attenuation (at 17.5 GHz) minus bandwidth correction factor, or 63.0 dBW/36MHz — 162.4 (dB—m‘)—1.1 dB (atmospheric) — 1010g(36)=—116.1 dBW/m"/MHz." Adjusting the atmospheric attenuation to account only for gaseous and scintillation effects (and not clouds) reduces that input from 1.1 dB to 0.74 dB."" Using this slightly reduced value in the formula yields a PFD of 63.0 dBW/36MHz — 162.37 (dB-mz) —0.74 dB (atmospheric) — 1010g(36) =—115.67 dBW/m®/MHz. This is still 0.18 dB less than the maximum allowable PFD under Section 25.208, and therefore complies with the Commission‘s rules."" Spectrum Five has not filed any objection or otherwise participated in any of DIRECTV‘s currently pending 17/24 GHz BSS application proceedings. Nonetheless, as demonstrated by the analysis set forth above, the Commission need not be concerned about the PFD calculation issue Spectrum Five has raised elsewhere, and should grant DIRECTV‘s applications as amended. ®— DIRECTV RB—2 Application, Narrative at 12. 4 Id., App. A (showing losses from gaseous effects as 0.44 dB and from scintillation as 0.3 dB). Atmospheric losses do not necessarily add linearly. In the absence of rain, such losses can be calculated as gaseous loss plus the square root of cloud loss squared plus scintillation loss squared. When clouds are not considered, however, the calculation reverts to a linear formula (%.2., gaseous loss plus scintillation loss). " Spectrum Five also notes that Section 25.138(a)(6) of the Commission‘s rules establishes PFD limits for Ka—band satellites for all conditions, including clear sky, and notes that DIRECT V‘s calculations in two recent Ka—band applications did not include gaseous and scintillation effects. See SS 103W LOI at 11—12. However, the fact that DIRECTV could demonstrate compliance with a PFD limitation in one context without reference to these factors does not mean that it should be precluded from including those factors in another context. Moreover, Section 25.138(a)(6) incorporates "the limits specified in Section 25.208(d)," which explicitly calls for "assumed free—space propagation conditions."

§25.207 47 CFR Ch. | (10—1—07 Edition) with the exception of satellite uplinks 4 kHz band for angles of arrival be— carrying broadband video information tween 25 and 90 degrees above the hori— which are required to incorporate ATIS zontal plane; or in accordance with the provisions set (2) —126 dB(W/m?) in any 1 MHz band forth under §25.308 of these rules. for angles of arrival between 0 and 5 de— [55 FR 21551, May 25, 1990] grees above the horizontal plane; —126 + (6—5)/2 dB(W/m?) in any 1 MHz band §25.207 Cessation of emissions. for angles of arrival (8) (in degrees) be— tween 5 and 25 degrees above the hori— Space stations shall be made capable zontal plane; and —116 dB(W/m?) in any of ceasing radio emissions by the use of 1 MHz band for angles of arrival be— appropriate devices (battery life, tim— tween 25 and 90 degrees above the hori— ing devices, ground command, etc.) zontal plane. that will ensure definite cessation of emissions. NOTE To PARAGRAPH (b): §25.208 Power flux density limits. (a) In the band 3650—4200 MHz, the power flux density at the Earth‘s sur— (c) In the 17.7—17.8 GHz, 18.3—18.8 GHz, face produced by emissions from a 19.3—19.7 GHz, 22.55—23.00 CHz, 23.00—23.55 space station for all conditions and for GHz, and 24.45—24.75 CGHz frequency all methods of modulation shall not ex— bands, the power flux density at the ceed the following values: Earth‘s surface produced by emissions —152 dB(W/m?) in any 4 kHz band for angles from a space station for all conditions of arrival between 0 and 5 degrees above for all methods of modulation shall not the horizontal plane; exceed the following values: —152+(@—5)/2 dB(W/m?) in any 4 kHz band for (1) —115 dB (W/m?) in any 1 MHz band angles of arrival 8 (in degrees) between 5 for angles of arrival between 0 and 5 de— and 25 degrees above the horizontal plane; grees above the horizontal plane. and (2) —115 + 0.5 @—5) dB (W/m?) in any 1 —142 dB(W/m?) in any 4 kHz band for angles MHz band for angles of arrival d (in de— of arrival between 25 and 90 degrees above the horizontal plane grees) between 5 and 25 degrees above the horizontal plane. (3) —105 dB (W/m?) in any 1 MHz band for angles of arrival between 25 and 90 degrees above the horizontal plane. (d) In addition to the limits specified (b) In the bands 10.95—11.2 and 11.45— in paragraph (c) of this section, the 11.7 GHz for GSO FSS space stations power flux—density across the 200 MHz and 10.7—11.7 GHz for NGSO FSS space band 18.6—18.8 GHz produced at the stations, the power flux—density at the Earth‘s surface by emissions from a Earth‘s surface produced by emissions from a space station for all conditions shall not ex— and for all methods of modulation shall ceed —95 dB (W/m?) for all angles of ar— not exceed the lower of the following rival. This limit may be exceeded by up values: to 3 dB for no more than 5% of the (1) —150 dB(W/m?) in any 4 kHz band time. for angles of arrival between 0 and 5 de— (e) In the 18.8—19.3 GHz frequency grees above the horizontal plane; —150 band, the power flux—density at the + (@—9)/2 dB(W/m? in any 4 kHz band Earth‘s surface produced by emissions for angles of arrival (8) (in degrees) be— from a space station for all conditions tween 5 and 25 degrees above the hori— and for all methods of modulation shall zontal plane; and —140 dB(W/m?) in any not exceed the following values: —115—X dB(W/me:MHz) for 0° <8 < 5° —115—X+((10+X)/20) (6—5)dB (W/im@MH2) for 5 48 < 15 —105 dB (W/AM##MHEZ) ... for 25° < 8 < 90° 238

Federal Communications Commission §25.208 Where: equivalent power—flux density in the 5: is the angle of arrival above the horizontal space—to—Earth direction (EPFDss,,), at plane; and any point on the Earth‘s surface, pro— X is defined as a function of the number of duced by emissions from all co—fre— satellites in the non—GSO FSS constella— tion, n, as follows: quency space stations of a single non— geostationary—satellite orbit (NGSO) for n €50 ... X=0 (dB) for 50 < n <288 X = (§/119) (n — 50) (dB) system operating in the fixed—satellite for n > 288 ... X = (1/69) (n + 402) (dB) service (FSS) shall not exceed the fol— lowing limits for the given percentages (f) [Reserved] of time. Tables 1G and 2G follow: (g) In the frequency bands 10.7—11.7 GHz and 11.7—12.2 GHz, the single—entry TasLe 1G—SingLe—ENTRY EPFD;,.,, LiMiTs FoR PROTEcTION oF 0.6, 1.2, 3 AND 10 Meter GSO FSS EARTH STATION AnTenNas ! 2 Percentage of Frequency band (GNz) for Inter— national engeety e "Tovidh~ Bsengh andwi Reference antenna diameter and Allacations haths ‘egngfi%t (iiz) reference radiation patten be exceeded 10.7—11.7 in all Regions; 11.7—12.2 1154 o 60 om, Recommendation MU—R in Region 2; 12.2=12.5 in Region 174 co s.1428 3; and 12.5—12.75 in Regions 1 170.8 co and 3 185.3 ca 73 1604 aa .001 160 09 .c07 160 100 40 10.7—11.7 in all Regions; 11.7—12.2 1819 o 1.2. m, Recommendation TUR in Region 2; 12.2=12.5 in Region es cas s.1428 3; and 12.5—12.75 in Regions 1 ta4 co 74 and 3 173 ca.as7 164 ca 95e 161.6 ca 08e 1614 aa.c01 160.8 09 .ca7 160.5 09 ca7 160 ca ccos 160 100 40 10.7—11.7 in all Regions; 11.7—12.2 10045 o 3. m, Recommendation ITUR in Region 2; 12.2—12.5 in Region 18045 co s.1428 3; and 12.5—12.75 in Regions 1 18745 cas and 3 1824 co.7 182 ca.ass 168 eg o7 164 ca.oss 162 a9.c05 160 09.000 160 100 40 10.7—11.7 in all Regions; 11.7—12.2 19545 o 10 m, Recommendation TUR in Region 2; 12.2—12.5 in Region 19545 co s.1428 3; and 12.5—12.75 in Regions 1 180 ca.es and 3 180 ca.71 1725 ca c 160 ca.c08 160 100 40 *n addition to the limits shown in Table 1G, the limits shown in Table 2G shall apply to all antenna sizes greater than 60 cm in the frequency bands lited in Table 1G 2For each reference antenna diameter, the limit consists of the complete curve on a plot which is linear in decibels for the EPFD levels and loganthmic for the time percentages, with straight lines joining the data points "The earth station antenna reference radiation pattems are to be used only for the calculation of interference from NGSO FSS systems into GSO FSS systems 230

§25.208 47 CFR Ch. | (10—1—07 Edition) TasLe 2G—SiNGte—ENTRY EPFD;..,, Limits RADIATED By NoN—GSO FSS Systems AT CeRTAIN Latitupes 100% of the time EPFDs.... dB(WI(m2/40 kiz}) Latitude (North or South in degrees) 160 0 < | Latitude | <57.5 ~160 + 34 (57.5 |Latitude | )4 57.5 <| Lattude | £63.75 1853 63.75 <| Latitude | NOTE TO PARAGRAPH any point on the Earth‘s surface, pro— duced by emissions from all co—fre— for all conditions and for all quency space stations of all non—geo— methods of modulation. stationary—satellite orbit systems oper— ating in the fixed—satellite service (h) In the frequency bands 10.7—11.7 (FSS) shall not exceed the following GHz and 11.7—12.2 GHz, the aggregate limits for the given percentages of equivalent power—flux density in the time. Tables 1H and 2H follow: space—to—Earth direction (EPFDss»»), at TasLe 1H—Acerecate EPFDs»,» LIMiTs FOR PROTECTION oF 0.6, 1.2, 3 AND 10 Meter GSO FSS EartH STATION ANTeNNAs ! Percentage o time dunin: Frequency band (GHz) for Inter— fagecet Thich ° SoF Reference antenna diameter and national Alocations d da(Wins) EPFDacen "32, May (Wiz) reterance radiaton pattom * exceeded 10.7—11.7 in all Regions; 11.7—122 170 o 60_ om, Recommendation MUR in Region 2, 122125 in Region 1626 so 51425 3; and 125—12.75 in Regions 1 1653 so and 3 1604 e 160 so ce 160 100 40 10.7—11.7 in all Regions; 11.7—122 Nee o 12 m, Recommendation TUR in Region 2, 12.2=12.5 in Reaion i73 so5 s.1425 3; and 1251275 in Regions 1 164 co s1 and 3 1615 sa 95 1644 so 07 1608 sa c 1605 so c 160 sa co7s 160 100 40 10.7—11.7 in all Regions; 11.7—122 185 o 3. m, Recommendation NTUR in Region 2, 122125 in Region 181 so s.428 3; and 125—12.75 in Regions 1 182 so5 and 3 16 so 0 164 so.0 162 sa 982 160 sa co7 160 100 40 10.7—11.7 in all Regions; 11.7—122 190 o 10 m, Recommendation TUR in Region 2, 12.2=12.5 in Region 180 so s.1428 3; and 1251275 in Regions 1 166 so. c and 3 160 sa o8 160 100 40 *In addtion to the imits shown in Table 1H, the agareaate EPFD..... limits shown in Table 2H shall apply to all antenna sizes greater than 60 cm in the frequency bands listed in Table 1H 2The earth station antenna reference pattems are to be used only for the calculation of interference from NGSO FSS systems into GSO FSS systems 240

Federal Communications Commission §25.208 TasLe 2H—SiNGLE—ENTRY EPFD;,.,, LiMits RADiATeD By Non—GSO FSS Systems AT CeRTAIN Latitupes 100% of the time EPFDs.... dB(WI(m2/40 kiz}) Latitude (North or South in degrees) 160 0 < | Latitude | <57.5 —160 + 34 (57.5 | Lattude |Y4 57.5 <| Lattude | £63.75 —165 3 63.75 <| Latitude | NOTE To PARAGRAPH (h): {additional operational EPFD,,) at any point on the Earth‘s surface, pro— duced by actual operational emissions for all conditions from all co—frequency space stations of and for all methods of modulation. a non—geostationary—satellite orbit ) In the frequency bands 10.7—11.7 (NGSO) system operating in the fixed— GHz and 11.7—12.2 GHz, the additional satellite service (FSS) shall not exceed operational equivalent power—flux den— the following operational limits for the sity, in the space—to—Earth direction, given percentages of time: ADDITIONAL OPERATIONAL LimiTs ON THE EPFD,,,,, RADATED &y NoN—GSO FSS Systems InTo 3 M AND 10 m GSO FSS EartH STATION ANTeNNas EPFDa.,,. 0B(W(m2/40 Wiz)) es which e ind EPED..,..may not be Receive PEA GSO earth station 182 so. 0 179 co o 176 so o7 im sa as 168 co ass & 165 es 163 so ase 16125 sa cca7s 16125 100 185 so o7 183 so as 179 sa ce 175 so 006 im so ces 10 168 sa aco 156 co cces 166 100 NOTE TO PARAGRAPH (1): EPFDa»») at any point on the Earth‘s surface, produced by actual operational for all conditions and for all emissions from the in—line co—frequency methods of modulation. space station of a non—geostationary— satellite orbit (NGSO) system oper— () In the frequency bands 10.7—11.7 ating in the fixed—satellite service GHz and 11.7—12.2 GHz, the operational (FSS) shall not exceed the following equivalent power—flux density, in the operational limits for 100% of the time: space—to—Earth direction, (operational 241

§25.208 47 CFR Ch. | (10—1—07 Edition) OPERATIONAL Limits To THE EPFD,,,,, RADIATED &y NoN—GSO FSS Systems IN CERTAIN FRequeNcy Banps! Pfe(cemgge of time dur— Receive Frequency band (GHz) for International alloca— EPFD»... ingwhion [féiefce G50seth Optalincifeto® tions dB(Wis) EPFDacem (Wiz) tenna di— (degrees) may not be exceeded ameter> (m) Prior to 31 December 2006: 10.7—11.7 in all Re— gions; 11.7—12.2 in Regions 2; 122—125 in Region 3; and 12.5—12.75 in Regions 1 and 3 t3 3 18e s 1875 a 1805 18 100 25 40 Prior to 31 December 2006: 10.7—11.7 in all Re— gions; 11.7—12.2 in Region 2; 12.2—125 in Re— gion ; and 12.5—12.75 in Regions 1 and 3 180 3 163 s 1815 a 1885 »18 100 >25 and 40 a5 From 31 December 2005; 10.7—11.7. in all Re— gions; 11.7—12.2 in Reion 2; 12.2—125 in Re— gion ; and 12.5—12.75 in Regions 1 and 3 16125 3 164 s 1855 a 1875 18 100 25 40 From 31 December 2005: 10.7—11.7 in all Re— gions; 11.7—12.2 in Region 2; 12.2—125 in Re— gion ; and 12.5—12.75 in Regions 1 and 3 15825 3 161 s 1825 a 185 18 100 >25 and 40 a5 ‘The operational limits on the EPFDa..., radiated by nan—GSO FSS systems shall be the values given in Table 2G or this table, whichever are the more stingent 2For antenna diameters between the values given in this table, the limits are given by linear interpolation using a linear scale for EPFD..... in decibels and a logarithmic scale for antenna diameter in meters NOTE TO PARAGRAPH (EPFD,,) produced at any point on the geostationary satellite orbit (GSO) by the emissions from all co—frequency for all condi— earth stations in a non—geostationary tions, for all methods of modulation and for the specified inclined GSO FSS operations. satellite orbit fixed—satellite service (NGSO FSS) system, for all conditions (k) In the frequency bands 12.75—13.15 and for all methods of modulation, GHz, 13.2125—13.25 CGHz and 13.75—14.5 shall not exceed the following limits GHz, the equivalent power flux—density, for the specified percentages of time in the Earth—to—space direction, limits: 242

Federal Communications Commission §25.208 Limits To THe EPFD,,, RapiateD ey NGSO FSS Systems in CeRtain FRequeNcy Banps Percentage soep CMiMeuan| Reference. Reference antenna beam— Frequency band (GHz) for International Alocations (BfhGkey "ZB bandwidth width and reference radi— maynothe (42) ation pattem exceeded 125—12.075; 12.75—1825; 18.75—14.5 160 100 «0 a* uk se72—4, Ls= 20 *For the case of L. = 10, the values a = 1.83 and b = 6.32 should be used in the equations in the Annex of Recommenda— tion [TU—R $.672—4 for single—feed circular beams, In all cases of L., the parabolic main beam equation should start at zero NOTE To PARAGRAPH (k): space—to—Earth direction, (EPFDa—), at any point on the Earth‘s surface, for all condi— produced by emissions from all co—fre— tions and for all methods of modulation. quency space stations of a single non— geostationary—satellite orbit (NGSO) (1) In the frequency bands 11.7—12.2 system operating in the fixed—satellite GHz and 12.5—12.75 GHz in Region 3, service (FSS) shall not exceed the fol— 11.7—12.5 GHz in Region 1 and 12.2—12.7 lowing limits in Tables 1IL and 2L for GHz in Region 2, the single—entry the given percentages of time: equivalent power—flux density, in the Taste 1L—SincLe—Entry EPFD Down Limits For Protecnion or 30, 45, 60, 90, 120, 180, 240 AND 300 CM GSO BSS EartH STaTION AnTennas 1.2.3.5 Percentage of time durin: Exemenee ceiOe teriies. EPDF ie Ts _ ET Reference antenna diameter and ids dB(Wine) EPFDawm m reference radiaton pattern* level may not be exceeded 11.7—125 in Region 1; 1.7—12.2 and 165841 o 40 30 om 125—12.75 in Region 3; 12.2—12.7 165541 25 Recommendation TU—R in Region 2 164.041 os B0. 1443 Annex 1 1526 os asr 1526 a9 420 15e3 a9.420 15e3 09 420 100 11.7—125 in Region 1; 1.7—12.2 and 175441 o 40 45 om 125—12.75 in Region 5; 12.2—12.7 172441 ss Recommendation TU—R in Region 2 160441 ar 75 B0. 1443 Annex 1 164 ca 357 180.75 aa.a00 160 ca.ose 160 100 11.7—125 in Region 1; 1.7—12.2 and 176441 o 40 60 om 125—12.75 in Region 3; 12.2—12.7 ar3 ie or e Recommendation TU—R in Region 2 18775 ea ar B0. 1443 Annex 1 162 ca.ase 161 cg acs 160.2 ag o7 160 o9 ca7 160 100 11.7—125 in Region 1; 1.7—12.2 and 1780 o 40 90 om 125—12.75 in Region 3; 12.2—12.7 17844 as Recommendation TU—R in Region 2 17644 os B0.1443 Anniex 1 im e9.420 1855 carie 162 ca.as7 161 cg oc3 160 aa .001 160 100 243

§25.208 47 CFR Ch. | (10—1—07 Edition) Taste 1L—Sincte—Entry EPFD Down Limits For Protecnion or 30, 45, 60, 90, 120, 180, 240 AND 300 CM GSO BSS EarTH STATION ANTeNNas ‘.25.5—Continued Percentage of time durin: Frequency band(GHe) for inter— EPDF uo virich ~ foabin Reference antenna diameter and oc dB(Wine) EPFDawem NE reference radiaton pattern* level may not be exceeded 11.7—125 in Region 1; 1.7—12.2 and 18244 o 40 120 om 125—12.75 in Region 3; 12.2—12.7 180.60 co Recommendation TU—R in Region 2 1r9.19 e B0. 1443 Annex 1 17844 os e 174.0 cas 17375 ca.ce i73 cace 1605 ca as 1678 eg 015 164 ca.04 1619 ca 07 161 ca c 1604 ca.c08 160 100 11.7—125 in Region 1; 1.7—12.2 and 184041 o 40 180 ome 125—12.75 in Region 3; 12.2—12.7 186. 101 as Recommendation TU—R in Region 2 181601 os5 B0. 1443 Annex 1 17525 ea 571 16325 ca as 1615 ca o7e 150.35 aa .003 160 09.000 160 100 11.7—125 in Region 1; 1.7—12.2 and 187 441 o 40 240 om2 125—12.75 in Region 3; 12.2—12.7 188 341 as Recommendation TU—R in Region 2 188441 0025 B0. 1443 Annex 1 17e ca.ree 1614 cg.osr 1619 cg.oss 1805 ca.004 160 09.000 160 100 11.7—125 in Region 1; 1.7—12.2 and 19104 o 40 300 om 125—12.75 in Region 3; 12.2—12.7 180441 as Recommendation TU—R in Region 2 185.041 ca5 B0. 1443 Annex 1 180.5 ca.a57 173 caore 167 agast 162 cg.oss 160 aa .001 160 100 "For BSS antenna diameters 180 cm, 240 m and 300 om, in addition to the single—entry limits shown in Table 1L, the limits in Table 2L shall also apply in the frequency band listed in Table 1L 2For 240 cm GSO 899 earth staton antennas located in Alaska, communicating with GSO B9 satelites at the 91° WIL.. 1019 WL., 110° WL., 1199 WL. and 148° WL. nominal orbital locations with elevation angles greater than 5°, 167 dB(W/(m*/ 40 Wiz)) single—entry 100% of the time operational EPFDa..., limit also applies to receive antennas "For 180 cm GSO BS8 earth station antennas located in Hawall communicating wth GSO BSS satelites that are operational as of December 30, 1999 at the 110° W.L.. 119° WL. and 148° WL. nominal ortital positions, 162.5 dB(W(m240 Wiz)) sin— gle—entry 100% of the time operational EPFD..... limit also applies *Under the section reference patten of Annex 1 to Recommendation TU—R B0.1443 shall be used only for the calculation of interference from non—GSO FSS systems into BSS systems SFor each reference antenna diameter, the limit consists of the complete curve on a plat which is linear in decibels for the EPFD levels and loganthmic for the time percentages, with straight line joining the data points TasLe 2L—SiNcLE—ENnTRy EPFD,.... Livits RapiaTeD Bv Non—GSO FSS Systems AT CeRTAIN Latitupes 100% of the time EPFDs.... dB(WI(m2/40 kiz)) Latitude (North or South in degrees) 160.0 0 <| Latitude | < 57.5 160.0+ 34 (575... | Latitude J¥ 57.5 <| Latitude | < 63.75 1653 63.75 <| Latitude | 244

Federal Communications Commission §25.208 NoTE To PARAGRAPH (1): to—Earth direction, (EPFD;,,,) at any point on the Earth‘s surface, produced for all conditions and for all by emissions from all co—frequency methods of modulation. space stations of all non—geostationary— satellite orbit systems operating in the (m) In the frequency bands 11.7—12.2 fixed—satellite service (FSS) shall not GHz and 12.5—12.75 CGHz in Region 3, exceed the following limits in Tables 11.7—12.5 GHz in Region 1 and 12.2—12.7 1M and 2M for the given percentages of GHz in Region 2, the aggregate equiva— time: lent power—flux density, in the space— TasLe 1M—Accrecate EPFDa»,. LIMITS FOR PROTECTION or 30, 45, 60, 90, 120, 180, 240 N 300 cm GSO BSS EartH StATION AnTeNNAs !23.5 Percentage of time dur— EPFD.. ing which Reference Reference antenna diame— Frequency band (GHz) for international allocations 5 yfi:®) EPFDa»» bandiwidth ter, and reference radiation level may (Wiz) pattem* not be ex— ceeded 11.7—125 in Region 1; 11.7—12.2 and 125—12.75 in 1804 o 30 em Region 3; 12.2—12.7 in Reion 2 160.1 25 40 Recommendation MU—R 1586 0s Bo.1443 1586 os Annex 1 15833 os 15833 100 11.7—125 in Region 1; 11.7—12.2 and 125—12.75 in 170 o 45 om Region 3; 12.2—12.7 in Reion 2 167 se 40 Recommendation MU—R 164 a7.5 Bo.1443 160.75 co.33 Annex 1 160 ca.05 160 100 11.7—125 in Region 1; 11.7—12.2 and 125—12.75 in im o 60 em Region 3; 12.2—12.7 in Region 2 16875 co 40 Recommendation MU—R 16775 or s Bo. 1443 162 cas Annex 1 161 ca s 1602 ca o 160 ca c 160 100 11.7—125 in Region 1; 11.7—12.2 and 125—12.75 in 17375 o 90 em Region 3; 12.2—12.7 in Region 2 173 as 40 Recommendation MU—R im os Bo.1443 1855 c0.1 Annex 1 163 cas 161 co s 160 c0 07 160 100 11.7—125 in Region 1; 11.7—12.2 and 125—12.75 in 177 o 120 cm Region 3; 12.2—12.7 in Reion 2 17525 co 40 Recommendation MU—R 17375 as o Bo.1443 173 as o Annex 1 1805 cas 1878 co 7 164 co 82 1819 ca 0 161 ca.085 1604 ca 002 160 100 245

§25.208 47 CFR Ch. | (10—1—07 Edition) TasLe 1M—Accrecate EPFD;..,, LIMITS FOR PROTECTION or 30, 45, 60, 90, 120, 180, 240 AND 300 om GSO BSS EARrtTH STATION ANTENNAS ‘25.5—Continued Percentage of time dur— wen ing which Reference Reference antenna diame= Frequency band (GHz) for international allocations 5 yyfét® EPFDa»» bandiidth ter, and reference radiation level may (Wiz) pattem# not be ex— ceeded 11.7—125 in Region 1; 11.7—12.2 and 125—12.75 in 1795 o 180 cm Region 3; 12.2—12.7 in Reion 2 1356 as 40 Recommendation MU—R 17625 os 5 Bo.1443 16325 cae1 Annex 1 1815 ca 01 16035 ca. 075 160 c0.005 160 100 11.7—125 in Region 1; 11.7—12.2 and 126—12.75 in 182 o 240 em Region 3; 12.2—12.7 in Reion 2 180.0 as 40 Recommendation MU—R 178 c0.25 Bo.1443 184 ca.as Annex 1 1819 co.4 1605 co.08 160 ca.005 160 100 11.7—12.5 in Region 1; 11.7—12.2 and 126—12.75 in 1855 o 300 em Region 3; 12.2—12.7 in Region 2 184 as 40 Recommendation MU—R 1805 cas Bo 1443 173 co 7 Annex 1 167 ca es 162 co.04 160 c0 07 160 100 ‘For BSS antenna diameters 180 cm, 240 cm and 300 om, in additon to the aggregate limit shown in Table 1M, the limits in Table 2M shall also apply 2For 240 cm GSO BS9 earth station antennas located in Alaska, communicating with GSO B9 satelites at the 91° WIL.. 1019 WL., 110° WL., 119° WL. and 148° WL. naminal orbital locations with elevation angles greater than 5°, 167 dB(W/(m2/ 40 Wiz)) aggreaate 100% of the time operational EPFD..... imit also applies to receive antennas "For 180 om GSO BS8 earth station antennas located in Hawali communicating wth GSO B5S satelites that are operational as of December30, 1999 at the 110° WL.. 119° WL. and 148° W.L. nominal orbital postions, 162.5 dB(Wi(m240 kiz}) ag— gregate 100% of the time operational EPFDs... limit also applies *Under the section reference patten of Annex 1 to Recommendation TU—R B0.1443 shall be used only for the calculation of interference from non—GSO FSS systems into GSO BSS systems SFor each reference antenna diameter, the limit consists of the complete curve on a plot which is linear in decibels for the EPFD levels and loganthmic for the time percentages, with straight line joining the data points TasLe 2M—Acerecate EPFD;,.,, LiMiTs RADIATED 8y Non—GSO FSS Systems AT CeRTAIN Latitupes 00% of the time EPFDa.... dB(Wm2/40 kiz)) Latitude (North or South in degrees) 160.0 0 <| Latitude | < 57.5 160.0 + 24 (67.5 | Latitude | )4 57.5 <| Latitude | < 63.75 1653 63.75 <| Latitude | NoTE TO PARAGRAPH (m): ellite service (space—to—Earth), for all conditions and for all methods of mod— ulation, shall not exceed the limits for all conditions and for all methods of modulation. given in Table N. These limits relate to the power flux—densit: (n) The powerflux density at the Earth‘s surface produced by emissions from a space station in the fixed—sat— 246

Federal Communications Commission §25.208 TasLe N—Limits or Power—FLux Density FRom Space Stations in The Banp 6700—7075 MHz Limit in dB(Wim2) for angle of aival (8) above the horizontal Frequency band plane Reference s band— co—50 so—250 250—900 8700—6825 MHiz 187 187 + 05(6 5) 127 1 Mz 6825—7075 MHz 154 154 + 05(6 5) 144 4 Wiz and and and 1 Mz 134 134 + 05(6 5) 12 (0) In the band 12.2—12.7 GHz, for NGSO FSS space stations, the specified low—angle power flux—density at the Earth‘s surface produced by emissions (that is, when no allowance is made for from a space station shall not be ex— propogation impairments such as rain— ceeded into an operational MVDDS re— fade): ceiver: —139 dB(W/m?) in any 1 MHz band for (1) —158 dB(W/m?) in any 4 kHz band angles of arrival between 0 and 5 de— for angles of arrival between 0 and 2 de— grees above the horizontal plane; grees above the horizontal plane; and —139 + 43 (G—5) dB(W/im?) in any 1 (2) —158 + 3.33(@—2) dB(W/m?) in any 4 MHz band for angles of arrival 5 (in de— kHz band for angles of arrival §) (in grees) between 5 and 20 degrees above degrees) between 2 and 5 degrees above the horizontal plane; and the horizontal plane. —119 + 0.4 (6—20) dB(W/m?) in any 1 MHz band for angles of arrival 5 (in de— NOTE TO PARAGRAPH (0): grees) between 20 and 25 degrees above the horizontal plane; —117 dB(W/m?) in any 1 MHz band for angles of arrival between 25 and 90 de— (p) The power flux—density at the grees above the horizontal plane; Earth‘s surface produced by emissions (2) This limit relates to the max— from a space station in either the imum power flux—density which would Earth exploration—satellite service in be obtained anywhere on the surface of the band 25.5—27 GHz or the inter—sat— the Earth during periods when FSS ellite service in the band 25.25—27.5 GHz system raises power to compensate for for all conditions and for all methods rain—fade conditions at the FSS Earth of modulation shall not exceed the fol— station: lowing values: —127 dB(W/m?) in any 1 MHz band for —115 dB(W/m?) in any 1 MHz band for angles of arrival between 0 and 5 de— angles of arrival between 0 and 5 de— grees above the horizontal plane; grees above the horizontal plane; —127 + 43 (G—$) dB(W/m?) in any 1 —115 + 0.5(— 5) dB(W/m?) in any 1 MHz MHz band for angles of arrival 5 (in de— band for angles of arrival between 5 grees) between 5 and 20 degrees above and 25 degrees above the horizontal the horizontal plane; and plane; —107 + 0.4 (6—20) dB(W/m?) in any 1 MHz band for angles of arrival 5 (in de— —105 dB(W/m?) in any 1 MHz band for grees) between 20 and 25 degrees above angles of arrival between 25 and 90 de— the horizontal plane; grees above the horizontal plane. —105 dB(W/m?) in any 1 MHz band for angles of arrival between 25 and 90 de— grees above the horizontal plane. NOTE TO PARAGRAPH (q): The conditions (q) In the band 37.5—40.0 GHz, the under which satellites may exceed the power flux—density limits for normal free space power flux—density at the Earth‘s sur— propagation described in paragraph (p)(1) to face produced by emissions from a geo— compensate for the effects of rain fading are stationary space station for all meth— under study and have therefore not yet been ods of modulation shall not exceed the defined. Such conditions and the extent to following values. which these limits can be exceeded will be 247

§25.208 47 CFR Ch. | (10—1—07 Edition) the subject of a further rulemaking by the —115 dB(W/m?) in any 1 MHz band for Commission on the satellite service rules. angles of arrival between 0 and 5 de— (r) In the band 37.5—40.0 GHz, the grees above the horizontal plane; power flux—density at the Earth‘s sur— —115 + 0.5 @—S5) dB(W/m?) in any 1 face produced by emissions from a non— MHz band for angles of arrival 5 (in de— geostationary space station for all grees) between 5 and 25 degrees above methods of modulation shall not ex— the horizontal plane; and ceed the following values: —105 dB(W/m?) in any 1 MHz band for angles of arrival between 25 and 90 de— 1 grees above the horizontal plane; NOTE TO PARAGRAPH (s): (that is, when no allowance is made for propogation impairments such as rain— fade): —132 dB(W/m?) in any 1 MHz band for (t) In the band 40.5—42.0 GHz, the angles of arrival between 0 and 5 de— power flux density at the Earth‘s sur— grees above the horizontal plane; face produced by emissions from a non— —132 + 0.75 G—5) dB(W/m?) in any 1 geostationary space station for all con— MHz band for angles of arrival 5 (in de— ditions and for all methods of modula— grees) between 5 and 25 degrees above tion shall not exceed the following val— the horizontal plane; and ues: —117 dB(W/m?) in any 1 MHz band for —115 dB(W/m?) in any 1 MHz band for angles of arrival between 25 and 90 de— angles of arrival between 0 and 5 de— grees above the horizontal plane; grees above the horizontal plane; —115 + 0.5 @—S5) dB(W/m?) in any 1 (2) This limit relates to the max— MHz band for angles of arrival 5 (in de— imum power flux—density which would grees) between 5 and 25 degrees above be obtained anywhere on the surface of the horizontal plane; and the Earth during periods when FSS —105 dB(W/m?) in any 1 MHz band for system raises power to compensate for angles of arrival between 25 and 90 de— rain—fade conditions at the FSS Earth grees above the horizontal plane; station: —120 dB(W/m?) in any 1 MHz band for NOTE TO PARAGRAPH (t): angles of arrival between 0 and 5 de— grees above the horizontal plane; —120 + 0.75 G—5) dB(W/m?) in any 1 MHz band for angles of arrival 5 (in de— (u) In the band 40.5—42.0 CHz, the grees) between 5 and 25 degrees above power flux—density at the Earth‘s sur— the horizontal plane; and face produced by emissions from a geo— —105 dB(W/m?) in any 1 MHz band for stationary space station for all condi— angles of arrival between 25 and 90 de— tions and for all methods of modula— grees above the horizontal plane. tion shall not exceed the following val— ues: NOTE TO PARAGRAPH (r); The conditions —120 dB(W/m?) in any 1 MHz band for under which satellites may exceed these angles of arrival between 0 and 5 de— power flux—density limits for normal free grees above the horizontal plane; space propagation described in paragraph (q)(1) to compensate for the effects of rain —120 + (6—5) dB(W/m?) in any 1 MHz fading are under study and have therefore band for angles of arrival 8 (in degrees) not yet been defined. Such conditions and between 5 and 15 degrees above the hor— the extent to which these limits can be ex— izontal plane; ceeded will be the subject of a further rule— —110 + 0.5 (6—15) dB(W/m?) in any 1 making by the Commission on the satellite MHz band for angles of arrival 5 (in de— service rules. grees) between 15 and 25 degrees above (s) In the band 40.04 0.5 GHz, the the horizontal plane; and power flux—density at the Earth‘s sur— —105 dB(W/m?) in any 1 MHz band for face produced by emissions from a angles of arrival between 25 and 90 de— space station for all conditions and for grees above the horizontal plane; all methods of modulation shall not ex— NOTE TO PARAGRAPH (u): m ceed the following values: 248

Federal Communications Commission §25.209 P (4) For all regions outside of the con— tiguous United States including Alaska (v) In the band 2496—2500 MHz, the and Hawaii: —115 dBW/m#/MHz. power flux—density at the Earth‘s sur— [48 FR 40255, Sept. 6, 1983, as amended at 52 face produced by emissions from non— FR 45636, Dec. 1, 1987; 59 FR 53329, Oct. 21, geostationary space stations for all 1994; 6 FR 54171, Sept. 7, 2000; 66 FR 10623, Feb. 16, 2001; 66 FR 63515, Dec. 7, 2001; 67 FR conditions and all methods of modula— 17299, Apr. 10, 2002; 67 FR 46911, July 17, 2002; tion shall not exceed the following val— 68 FR 16448, Apr. 4, 2003; 68 FR 43946, July 25, 2003; 69 FR 31745, June 7, 2004 69 FR 52207, Aug. 25, 2004; 70 FR 24725, May 11, 2005; 70 FR 46675, Aug. 10, 2005; 71 FR 35188, June 19, 2006; (1) —144 dB (W/ima2) in 4 kHz for all 72 FR 50029, Aug. 29, 2007] angles of arrival between 0 and 5 de— §25.209 Antenna performance stand— grees above the horizontal plane; —144 ards. dB (W/ima2) + 0.65(6 —5) in 4 kHz for all (a) The gain of any antenna to be em— angles of arrival between 5 and 25 de— ployed in transmission from an earth grees above the horizontal plane; and station in the geostationary satellite —131 dB (W/im*2) in 4 kHz and for all orbit fixed—satellite service (GSO FSS) angles of arrival between 25 and 90 de— shall lie below the envelope defined as grees above the horizontal plane. follows: (2) —126 dB (W/im«2) in 1 MHz for all (1) In the plane of the geostationary angles of arrival between 0 and 5 de— satellite orbit as it appears at the par— grees above the horizontal plane; —126 ticular earth station location: dB (W/im*2) + 0.65(6 —5) in 1 MHz for all angles of arrival between 5 and 25 de— 2925 log;, (Theta) dBi 1°</= Theta </= 7° grees above the horizontal plane; and +8 dBi 7°< Theta </= 9.2° —113 dB (W/im«2) in 1 MHz and for all angles of arrival between 25 and 90 de— 3225 log,, (Theta) dBi 9.2°< Theta </= 48° grees above the horizontal plane. —10 dBi 48°< Theta </— 180° (w) The power flux density at the Earth‘s surface produced by emissions where Theta is the angle in degrees from the axis of the main lobe, and dBt refers to dB from a 17/24 GHz BSS space station op— relative to an isotropic radiator. For the erating in the 17.3—17.7 GHz band for all purposes of this section, the peak gain of conditions, including clear sky, and for an individual sidelobe may not exceed the all methods of modulation shall not ex— envelope defined above for Theta between ceed the regional power flux density 1.0 and 7.0 degrees. For Theta greater than levels defined below. 7.0 degrees, the envelope may be exceeded by no more than 10% of the sidelobes, pro— (1) In the region of the contiguous vided no individual sidelobe exceeds the United States, located south of 38° gain envelope given above by more than 3 North Latitude and east of 100 West dB. Longitude: —115 dBW/m#MHz. (2) In all other directions, or in the (2) In the region of the contiguous plane of the horizon including any out— United States, located north of 38° of—plane potential terrestrial inter— North Latitude and east of 100° West ference paths: Longitude: —118 dBW/m#/MHz. Outside the main beam, the gain of (3) In the region of the contiguous the antenna shall lie below the enve— United States, located west of 100 West lope defined by: Longitude: —121 dBW/m#/MHz. 32—25 log,, (Theta) dBi 1°</= Theta </= 48° —10 dBi 48°< Theta </— 180° where Theta and dBi are defined above. For the purposes of this section, the envelope may be exceeded by no more than 10% of the sidelobes provided no individual sidelobe exceeds the gain envelope given above by more than 6 dB. The region of the 249


Document Created: 2008-12-08 11:49:03
Document Modified: 2008-12-08 11:49:03
© 2025 FCC.report
This site is not affiliated with or endorsed by the FCC