Flight Lessons

wrote in message
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"Tarver Engineering" wrote:

I don't mind if you can learn Mike, but so far, you are just another
dip****.

Coming from you (of all people!) that's incontrovertible proof that
I'm in good company.

You caught the attention of ram's peanut gallery, but insulted the
professionals.

Fluff you are, then.

wrote in message
...
"Tarver Engineering" wrote:

Fluff you are, then.

Speaking of "fluff," you need some fresh bait.

I'm trying to fend you off from the boat with an oar already, lune.

In article , "Paul J. Adam"
wrote:

In message ,
Harry Andreas writes
In article , "Paul J. Adam"
wrote:

Of course, if the GPS co-ordinates are wrongly calculated, wrongly
entered, or the GPS battery fails midflight, that's a very lost
formation... with no navigators to rescue them.

Military aircraft GPS use aircraft power with transient backup, not
batteries.

Assuming a fully integrated GPS, rather than a civilian handheld
attached to the glareshield as an Urgent Operational Requirement
solution pending the procurement of the fully integrated navigation
upgrade.

Life is rarely as perfect as you'd like.

Yet airborne GPS systems have been around for a long time.

check out the MAGR system

http://gps.losangeles.af.mil/user/products/magr2000/

and here is a photo of all the platofrms it's used on

http://gps.losangeles.af.mil/user/pr...0/m-images.htm

the virtual gamut of all first line US aircraft, with the exception of the
F-15C/D/E.
(I wonder why that is?)

--
Harry Andreas
Engineering raconteur

"Harry Andreas" wrote in message
...
In article , "Paul J. Adam"
wrote:

snip

Assuming a fully integrated GPS, rather than a civilian handheld
attached to the glareshield as an Urgent Operational Requirement
solution pending the procurement of the fully integrated navigation
upgrade.

Life is rarely as perfect as you'd like.

Yet airborne GPS systems have been around for a long time.

Adam just keeps getting more clueless.

Here is a nice picture of a PDI designed to be driven from a civilian
FMS/GPS, designed circa 1996.

http://www.skylight-avionics.com/panel1s.jpg

"Tarver Engineering" wrote:

I'm trying to fend you off from the boat with an oar already, lune.

Keep trying. You haven't drawn any high-intensity flames yet...

-Mike (having a slap fighting contest against a man w/no arms) Marron

Harry Andreas wrote:


the virtual gamut of all first line US aircraft, with the exception of the
F-15C/D/E.
(I wonder why that is?)


Not a single Transport aircraft? Missing every major airlifter,
not to mention the minor airlifters as well.

Mike Williamson

as long as the GPS is working. But it's a low-powered signal from orbit
and it's easily jammed.

How true is this, really? In an aircraft, you are between the ground
and the satellite. How does someone on the ground interfere with the
signal?

all the best -- Dan Ford
email: www.danford.net/letters.htm#9

see the Warbird's Forum at www.warbirdforum.com
and the Piper Cub Forum at www.pipercubforum.com

Cub Driver wrote:

as long as the GPS is working. But it's a low-powered signal from orbit
and it's easily jammed.


How true is this, really? In an aircraft, you are between the ground
and the satellite. How does someone on the ground interfere with the
signal?


I don't believe that the antenna for the GPS is directional enough
that someone off axis couldn't put a signal into your system- after
all, a single antenna is used to pick up every satellite above the
horizon.

Mike Williamson

Michael Williamson
wrote:



Cub Driver wrote:

as long as the GPS is working. But it's a low-powered signal from orbit
and it's easily jammed.


How true is this, really? In an aircraft, you are between the ground
and the satellite. How does someone on the ground interfere with the
signal?


I don't believe that the antenna for the GPS is directional enough
that someone off axis couldn't put a signal into your system- after
all, a single antenna is used to pick up every satellite above the
horizon.

Mike Williamson

While this is true (the receiver antennas need to be and are
omni-directional) the satellites broadcast on ~1.5 gigahertz
therefore are very much 'line-of-sight' so any interference must
be transmitted within 'line-of-sight' to the 'interferee'. IOW,
to block a gps receiver you gotta be relatively close to it when
you're on the ground...if you're inflight then....you know...
--

-Gord.

In article , Michael Williamson
wrote:

Harry Andreas wrote:


the virtual gamut of all first line US aircraft, with the exception of the
F-15C/D/E.
(I wonder why that is?)


Not a single Transport aircraft? Missing every major airlifter,
not to mention the minor airlifters as well.

I only put in a link for one example system, there are many more.
We very recently won a contract to upgrade the entire C-130 fleet.

--
Harry Andreas
Engineering raconteur