what is the uplink and downlink frequency GPS satellite?

March 26, 2009 by admin · 1 Comment
Filed under: Engineering 
gps
sankar asked:


what is the uplink and downlink frequency GPS satellite, time delay for receving the data from the GPS satellite, height of the satellite.

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One Response to “what is the uplink and downlink frequency GPS satellite?”
  1. Technology Guy says:
    March 29, 2009 at 2:58 pm

    Here is some info:
    Frequencies used by GPS include

    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.

    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 (see GPS modernization). 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 2008.

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