Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    Name or NavList Code:
    Re: Learn the stars, by phone
    From: Lu Abel
    Date: 2009 May 23, 11:51 -0700

    Don't know the iPhone answer to this one, Frank, but...
    I discussed the SkyScout patents with a bunch of (like me) gray-haired
    engineers over breakfast this morning.   Several remarked that a number
    of 1950's and 1960's era guided missiles (and, come to think of it, the
    SR-71 Blackbird) used a form of celestial navigation where the system
    would acquire one or more stars and thereafter track the stars to infer
    the missile's position.  Star acquisition could not take place until the
    missile was in the stratosphere and the sky went dark.   So the guidance
    system had to do a coarse acquisition of the star(s) using a position
    estimate, and elevation and azimuth from a compass.  Sounds a heck of a
    lot like the SkyScout.   But once a patent is issued it's presumed valid
    and an "infringer" has an uphill fight to prove prior art.  IANAL, too....
    frankreed@HistoricalAtlas.com wrote:
    > The patent in the 7 million range is for some other device or system, but 
    patent 6,366,212 does appear to be the basis for the SkyScout:
    > http://www.google.com/patents?id=VXwLAAAAEBAJ
    > It has magnetic sensors, gravity/acceleration sensors, location/time input, 
    a database of objects, and identify and find modes of operation. Beyond that, 
    as expected for a patent, the details are rather vague.
    > But here's a question: suppose company A, e.g. Apple, builds a device, 
    presumably a smart mobile phone, that has the hardware features. This same 
    company A includes software with its device which identifies buildings and 
    landscape features (nothing astronomical and clearly outside the scope of the 
    patent above). Can company B, e.g. me, write software which contains the 
    database of astronomical objects and the identify/find features without 
    infringing on the above patent? Presumably the patent lawyers for this 
    invention maintain active searches for infringement and they're probably 
    reading this right now :-) (am I kidding or not??). I'm inclined to think 
    that it would not infringe, since their patent covers a purpose-built 
    astronomical device, but, to use an old Internet/Usenet acronym, IANAL.
    > -FER
    > PS: for the acronym: http://en.wikipedia.org/wiki/IANAL
    > >
    Navigation List archive: www.fer3.com/arc
    To post, email NavList@fer3.com
    To , email NavList-@fer3.com

    Browse Files

    Drop Files


    What is NavList?

    Get a NavList ID Code

    (please, no nicknames or handles)
    Do you want to receive all group messages by email?
    Yes No

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

    Enter the email address associated with your NavList messages. Your NavList code will be emailed to you immediately.

    Email Settings

    NavList ID Code:

    Custom Index

    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site