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The Global Positioning System A Shared National Asset (1995) / Chapter Skim
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Appendix I: Report from Mr. Melvin Barmat, Jansky/Barmat...
Pages 221-248

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From page 221...
... Appendix I Report From Mr. Melvin Barmat, Jansky/Barmat Telecommunications, Inc.
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From page 222...
... SUITE 1010 WASHINGTON, D.C. 20036 Preliminary Assessment of Frequency Bands for Use by a New GPS Signal for the Committee on the Future of Global Positional System of the National Research Council (202)
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From page 223...
... Appendix I 223 Preliminary Assessment of Frequency Bands f or Use by a New GPS Signal ABSTRACT Because of the congestion in the use of the 1-2 GHz frequency band, an initial investigation was potential The band appear to undertaken to availability of spectrum to 960 to 1950 MHz was considered have promise for the proposed evaluate the support a new GPS signal. and several sub-bands new signal.
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From page 224...
... O The new GPS signal (L4) should not cause the cost of civil GPS receivers to be increased substantially and therefor should preferentially use frequencies between L1 (1575.-~2 MHz)
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From page 225...
... o Because of the above, and since vehicles will often use the new GPS signal, frequency bands currently allocated for transmission of communications from vehicles should be avoided.2 Bands allocated to the space-to-Earth Mobile Satellite Service should also be avoided since the transmitted power (both in-band and nearby out-of-band) of such satellites will cause harmful interference to GPS signals.
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From page 226...
... Course of Action Obviously, prior to selecting a band for the new GPS signal, in-depth investigations regarding existing use of the potential bands and detailed analyses regarding sharing of frequencies (including consideration of out-of-band emissions) need to be undertaken.
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From page 227...
... Appendix I 227 Frequency allocations are made at international treaty conferences called World Radio Conferences (WRC)
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From page 228...
... 228 UPS: A Shared National Asset TABLE 1 Comments on Potential Use o f Frequency Bands f or a New GPS Signal
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From page 229...
... 229 it.
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From page 230...
... Secondary amateur satellite service operates Earth-space in this band and could cause localized interference that would be difficult to uncover. This band is allocated worldwide to Aeronautical Radionavigation and is used for surveillance radars in air traffic control (ATC)
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From page 231...
... . These satellite transmissions would cause unacceptable interference to an L4 GPS receiver in the band .
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From page 232...
... Band edge use would not be acceptable. Not Feasible Worldwide allocation to Mobile Satellite (Earth-space)
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From page 233...
... The band 1885-2025 is set aside for a next generation worldwide public land mobile telephone system and the FCC has extended the band down to 1850 MHz for such use in the U.S. The band 1761-1842 MHz is used for a number of USG space services.
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From page 234...
... The relevant portion of the Table of Frequency Allocations of the Radio Regulations is attached hereto. Before describing this Table, it is important to note that the international Radio Regulations are treaty obligations (having the force of law)
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From page 235...
... 7 707A 928 - 942 FIXED MOBILE except aeronautical mobile Radiolocation 704 705 942 - 960 942 - 960 FIXED FIXED MOBILE except MOBILE aeronautical mobile BROADCASTING 703 704 . _ 960 - 1 215 AERONA UTICAL RADIONAVIGATION 709 1 215 - 1 240 RADIOLOCATION RADIONAVIGATION-SA1.ELLITE (space-to-E;mh)
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From page 236...
... 1 400- 1 427 72 1 722 1 427 - 1 429 SPACE OPERATION (E=h-to-space) FIXED MOBILE except aeronautical mobile 722 1 429 - 1 452 FIXED MOBILE except aeronautical mobile 722 723 B 1 429 - 1 452 FIXED MOBILE 723 722 _
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From page 237...
... Ea~ Exploration-Satellite Land h(obile-Satellite (space-to-Earth' 726B obile eXcept aeronautica mobile 724 ~,2 723 B 725 72fiA ho 1 525 - 1 530 SP~CE OPERATION _ Region2 I Region 3 1 452 - 1 492 FIXED MOBILE 723 BROADCASTING 722A 722B BROADCASTlNG-SATELLIl~E 722A 722B 722 722C t 492- 1 525 FIXED htOBILE 723 MOBlLE-SATELLlTE (space-to-Emh) 722 722C 723C 1 525- 1 530 SPACE OPERATION (space-to-E=h)
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From page 238...
... LAND MOBILE SATELLITE (space-to-Earth) Earth Exploration-Satellite Fixed Mobile except aeronautical mobile 722 723B 726A 726D 1 533 - 1 535 SPACE OPERATION (space-tmEarth)
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From page 239...
... 722 726A 726D 727 730 730A 730B 730C 1 559- 1 610 AERONAUTICAL RADIONAVIGATION RADIONAVIGATION-SATELL1TE (space-tmEarth) 722 727 730 731 1 610- 1 610.6 1 610 - 1 610.6 MOBILE-SAl.ELLlTE MOBILE-SATELLITE (&rth-tmspace)
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From page 240...
... 722 727 730 731 731 E 731 F 732 733 733A 733B 733E 733F 1613.8-1626.5 MOBILE-SATELLITE (Earth - tm space) AERONAUTICAL RADIONAVIGATION RADIOD~TERMINATION SATELLITE (Earth-tmspace)
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From page 242...
... 671 722 671 722 735A l 1710-1930 I:IXED MOBILE 740A 722 744 745 746 746A Region 3 1 675- 1 690 METEOROLOGICAL AIDS FIXED METEOROLOGICAL SATELLITE (space-to-Earth) MOBILE except aeronautical mobile 722 1 690- 1 700 METEOROLOGICAL AIDS METEOROLOGICAL SATELLITE (space-to-Earth)
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From page 243...
... line observations of the radio astronomy service from harmful interference in the band l 330 I 400 MHz. Emissions from space or airborne stations can be particularly serious sources of interference to the radio astronomy service (see Nos.
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From page 244...
... 244 UPS: A Shared National Asset ATTACHMENT A By J
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From page 245...
... Appends I Due* Keith, 245 This note is In response to your z-mat fin ~ to IBM Ant mar ~d &equ~nvy sad sash oo ~ future GES-~pc ~Le1 to prude the Willis co~rnm~ with iano~p~ic eor~ass.
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From page 246...
... 246 UPS: A Shared National Asset R=n~r that, in ardor to ~ s ane n~ ditlk~est~ aup day, you must be able to measure to-Irate 0.01 at ;~ ~ of a 10.28 hi modulate us~pe, or to 0.0{11 of ~ cycle, of ~ 1.023 ma: adulation aqua. I don't War loom may it He to masseuse pry to Ace ~andth ~ ~ eyed of to nay 1 MEz Envy but ~ way doubt whether thy i8 posture, Up to Sat t0 a-~ ~ ~-, We it Ant in Me Laud ne~-ion-~ 0~ c-~t 3sSe~e Am boy pace to gal of ~ coy redo why oo ~ Tie He or wh" the lam-Intern ma?
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From page 247...
... AppendiJc I 247 co~ArIoM OF DIFFER!
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From page 248...
... 248 I I r ~ S I l~l~ rat, ~ ret ~ I I I err I I I I I I ~ ~ I I ~ I I I I ~ I I ~ I I Pro \ ' \ ' ~\ ~` _ ' !
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Key Terms

  • aeronautical radionavigation
  • mobile except
  • mobile services
  • worldwide allocations
  • radio astronomy

  • surveillance radars
  • space research
  • space operation
  • primary basis
  • except aeronautical

  • gps receiver
  • cause unacceptable
  • aeronautical mobile
  • unacceptable interference
  • mobile satellite

  • traffic control
  • telephone service
  • secondary basis
  • air traffic
  • passenger telephone

  • air passenger
  • set aside
  • astronomy service
  • passive space
  • band emissions

  • gps signal
  • worldwide public
  • harmful interference
  • associated airborne
  • nearby vehicle


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