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  1. 04-05-2008 02:06 PM #1
    KnightHawk
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    Default Lidar Cosine Effect

    Here is a copy of the lidar cosine effect from law enforcement training manual. It will show the true speed data with different angles.

    ************************************************** **********************************************
    Quote Originally Posted by Swamp
    Those who wish to doubt will always find a reason to doubt regardless of how much evidence is presented, and those who wish to believe will find enough evidence to believe


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  3. 04-05-2008 02:23 PM #2
    ahmadr
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    You can easily calculate the speed using the formula below to create such a chart in excel

    true_speed = radar_speed / Cos(angle)

    Edit: Corrected typo caught by memtek
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  4. 04-05-2008 02:37 PM #3
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    Default

    I've rescanned the document and is better.
    ************************************************** **********************************************
    Quote Originally Posted by Swamp
    Those who wish to doubt will always find a reason to doubt regardless of how much evidence is presented, and those who wish to believe will find enough evidence to believe


  5. 04-05-2008 03:33 PM #4
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    Quote Originally Posted by ahmadr
    You can easily calculate the speed using the formula below to create such a chart in excel

    true_speed = radar_speed * Cos(angle)
    Nope, I'm sure it was a typo on your behalf. Correct is:

    radar_speed = true_speed * Cos(angle)





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  6. 04-05-2008 04:56 PM #5
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    Oops
    All of my posts should be treated as my personal opinion or imagination. Any potential resemblance to actual facts, persons, products, or objects is purely coincidental.

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  7. 04-05-2008 06:04 PM #6
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    It appears to be better than radar?
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  8. 04-06-2008 11:05 PM #7
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    Default

    how so u read this and what is the term mean?
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  9. 04-06-2008 11:17 PM #8
    ELVATO
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    It basically means that unless a LEO is standing directly in front of a speeding car (0 degrees), the speed the gun will show will be less than what the car is actually doing.

    For example, if the car is doing 70, and the LEO were standing 60 degrees off the side of the road, the gun will read 35 MPH. If he were standing 20 degrees, the gun will read 65.


  10. 04-06-2008 11:43 PM #9
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    Quote Originally Posted by ELVATO
    If he were standing 20 degrees, the gun will read 56.
    I'm pretty sure this is just a typo error.
    ************************************************** **********************************************
    Quote Originally Posted by Swamp
    Those who wish to doubt will always find a reason to doubt regardless of how much evidence is presented, and those who wish to believe will find enough evidence to believe


  11. 04-06-2008 11:53 PM #10
    ELVATO
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    Quote Originally Posted by Azonehits
    Quote Originally Posted by ELVATO
    If he were standing 20 degrees, the gun will read 56.
    I'm pretty sure this is just a typo error.

    I don't know what you're talking about.

    ops: We can only wish it read that, huh.



 
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