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: Gps

  1. #1
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      AYMAN GAMAL
    Sep 2008
    Alexandria, Egypt, Egypt
    2,482
    8190

    Gps




    (GPS)















    (: Global Positioning System) (: GPS). NAVSTAR-GPS. NAVSTAR-GPS Navigational Satellite Timing and Ranging - Global Positioning System . 17.07.2007 Glonass .




    . . . . . . . . ( 10 ). 2000 . 50 :
    1575,42 MHz
    1227,6 MHz







    24 19000 . . ( ). . 3 .
    . ( ). . . .




    ( ) .
    tn . :


    c ( ) t0 .



    GPS


    GPS

    GPS : Global Positioning System : .
    24 . 1980 . GPS 24 .





    7.000





    :
    1- 1978 .
    2- 24 1994 .
    3- . .
    4- 6 .
    5- 50 .
    6- : L1 L2 . L1 1575.42 MH UHF .


    GPS (24 ) . . .. . ( )





    (GPS) :
    1- ()
    2- ()
    .
    ( )
    () .. : ... : = . : 186.000 .
    : :

    11.000 11.000 .. :




    12.000 ..




    13.000 : () () :




    . (3D) ( + + ) .

    GPS :

    GPS 15 !! GPS :
    1- .
    2- .. . .

    .


    3- .
    4- .
    5- .

    :




  2. #2
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      Ahmed Waheed Shalaby
    Dec 2009
    ""
    37
    903
    6111




  3. #3
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      ALY ELSAYED
    May 2009
    ALEXANDRIA
    37
    3,086
    8559











    gps hand , gps statin







    [̲̅I̲̅].....[̲̅♥̲̅].....[̲̅E̲̅][̲̅G̲̅][̲̅Y̲̅][̲̅P̲̅][̲̅T̲̅]
    --



  4. #4
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      Mohamed Gaber Aly
    SURVEY MANAGER - DUTCH DREDGING
    Nov 2009
    ALEX
    740
    6088

    .

    :
    1- 20200KM 19000KM
    2- L1&L2 ( L1 ) 3 L1 1



    Satellite frequencies

    L1 (1575.42 MHz): Mix of Navigation Message, coarse-acquisition (C/A) code and encrypted precision P(Y) code, plus the new L1C on future Block III satellites.

    L2 (1227.60 MHz): P(Y) code, plus the new L2C code on the Block IIR-M and newer satellites since 2005.

    L3 (1381.05 MHz): Used by the Nuclear Detonation (NUDET) Detection System Payload (NDS) to signal detection of nuclear detonations and other high-energy infrared events. Used to enforce nuclear test ban treaties.

    L4 (1379.913 MHz): Being studied for additional ionospheric correction.

    L5 (1176.45 MHz): Proposed for use as a civilian safety-of-life (SoL) signal . This frequency falls into an internationally protected range for aeronautical navigation, promising little or no interference under all circumstances. The first Block IIF satellite that would provide this signal is set to be launched in 2010]

    .

  5. #5
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    10%
    Jan 2010
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  6. #6
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      lakndhola
    10%
    Feb 2010
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  7. #7
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      GIS4ALL
    10%
    Feb 2010
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  8. #8
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      w0Lv
    10%
    Aug 2009
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    Gz@k ALLAH 5'eR
    pJIcJ I oJJ I
    Cr@ck3R
    DΘи't ╪яу 2 киΘω мε






  9. #9
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      eng_asaad
    10%
    Mar 2010
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