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  1. #1
    ColoradoCoolBreeze
    Reputation: SingleTrackLovr's Avatar
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    New GPS satelite launched???

    A couple weeks ago a new satelite was launched. Will this new satelite improve our GPS accuracy?

  2. #2
    mtbr member
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    accuracy

    The "dither" has been turned off on the GPS sats. The lat & long is about as good as it's gonna get. The altitude accuracy is dependent on the geometry of the sats. If there is a sat directly overhead, accuracy is good. Otherwise the altitude solution is not as good as the lat-long solution. The dither introduced a 100 meter error into the solution. The new sat has a "flag" to indicate the health of the GPS sat. This is for the airlines. The feds wanted a status flag. Accuracy will not be any better. It requires a WAAS equiped GPS receiver to give better accuracy. The small bicycle and handhelds will never be as accurate as a WAAS equipted receiver. Wiki has a good explanation of these terms.

  3. #3
    Masher
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    To answer the OP's question, no, and they periodically launch a new sat to replace an aging one...
    And most modern handhelds can receive the WAAS signal, decode it, and use it to determine a solution.

  4. #4
    Spring! Spring! Spring!
    Reputation: bear's Avatar
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    fwiw, my Garmin 60CSx usually gets accuracy (it reports, again FWIW) between 9-15 feet.

    Which, frankly, I find remarkable.

  5. #5
    mtbr member
    Reputation: Walt Dizzy's Avatar
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    Waas

    From:

    https://buy.garmin.com/shop/shop.do?cID=145&pID=8703

    "With its high-sensitivity, WAAS-enabled GPS receiver, eTrex Vista HCx locates your position quickly and precisely and maintains its GPS location even in heavy cover and deep canyons."

    MSRP $321.41

    I paid about $220 on sale at REI earlier this month. Santa came early!

    Walt

  6. #6
    Masher
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    Quote Originally Posted by bear
    ...(it reports, again FWIW) between 9-15 feet...
    Each vendor has their own calculation method for "Position Error Estimate", some are conservative, some optimistic... But overall you are right, regardless of the number reported it's pretty dang good considering the technology!

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