Kevin Horton
September 21st 04, 11:41 AM
On Tue, 21 Sep 2004 03:11:27 +0000, UltraJohn wrote:
>
>>> On Sun, 19 Sep 2004 17:00:12 GMT, R. David Steele
>>> <steele.david@verizon(DOT)net/OMEGA> wrote:
>>>
>>> >GPS and Beyond: The SatNav Transition June 18, 2003
>>> >By Ross Bowie
>>> >
>>> >
>>> <snip>
>>>somethingggggoing to make a prediction.
>>> Within 20 years we will no longer depend on GPS for navigation, at
>>> least not as the primary, or sole means of navigation toward which we
>>> are currently moving.
>>>
>>> We already have some pretty good solid state gyros and inertial
>>> systems.
>>>
>>> I'd bet that we are going to reach a point where we will be able to
>>> have small, compact, and inexpensive systems that will be independent
>>> of outside sources except for possibly "correction, or reference
>>> points". those points could be GPS and/or widely spaced ground
>>> stations.
>>>
>>>
>
> According to my "SR-71 POH" it used and INS with star mapping to correct
> it. They have improved tremendously in the optics and microcontroller
> since that system was devised so I would think you could use something
> like that today without to much trouble.
> John
Sure, if you can fly high enough so the stars are visible during daylight.
Otherwise, this will only work at night and if there isn't too much cloud
cover.
--
Kevin Horton RV-8 (finishing kit)
Ottawa, Canada
http://go.phpwebhosting.com/~khorton/rv8/
e-mail: khorton02(_at_)rogers(_dot_)com
>
>>> On Sun, 19 Sep 2004 17:00:12 GMT, R. David Steele
>>> <steele.david@verizon(DOT)net/OMEGA> wrote:
>>>
>>> >GPS and Beyond: The SatNav Transition June 18, 2003
>>> >By Ross Bowie
>>> >
>>> >
>>> <snip>
>>>somethingggggoing to make a prediction.
>>> Within 20 years we will no longer depend on GPS for navigation, at
>>> least not as the primary, or sole means of navigation toward which we
>>> are currently moving.
>>>
>>> We already have some pretty good solid state gyros and inertial
>>> systems.
>>>
>>> I'd bet that we are going to reach a point where we will be able to
>>> have small, compact, and inexpensive systems that will be independent
>>> of outside sources except for possibly "correction, or reference
>>> points". those points could be GPS and/or widely spaced ground
>>> stations.
>>>
>>>
>
> According to my "SR-71 POH" it used and INS with star mapping to correct
> it. They have improved tremendously in the optics and microcontroller
> since that system was devised so I would think you could use something
> like that today without to much trouble.
> John
Sure, if you can fly high enough so the stars are visible during daylight.
Otherwise, this will only work at night and if there isn't too much cloud
cover.
--
Kevin Horton RV-8 (finishing kit)
Ottawa, Canada
http://go.phpwebhosting.com/~khorton/rv8/
e-mail: khorton02(_at_)rogers(_dot_)com