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Cellular forums Home > Archive > GPS > December 2006 > eLoran still needed as backup for GPS
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eLoran still needed as backup for GPS
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| Bob Gardner 2006-12-24, 12:33 pm |
| I'll have to admit to some confusion. I have been to the U. S. Coast Guard's
West Coast Navigation Center in Petaluma, California and have seen eLoran in
action. The day I was there, they were tracking 27 stations simultaneously,
including the one on St. Paul Island in Alaska that I put on the air while
on active duty in 1961. Googling "enhanced Loran" will deliver a ton of
information. The Coast Guard has completed updating its transmitters and
timers...what we lack in the US is enough publicity about the service for
the manufacturers of GPS units to develop combination loran-GPS units. I
visited Locus, Inc., in Madison, Wisconsin, the company that developed the
all-in-view receiver, and saw such a unit in action.
The writer of the article seems unaware of what is going on in the US.
Bob Gardner
"Andreas van Hooijdonk" <ahooijdz@scarletz.bez (NoZ)> wrote in message
news:YvWdne- Fbpi_RhDYnZ2dnUVZ8tu
3nZ2d@scarlet.biz...
> Here is the full article:
>
> http://www.fcw.com/article97163-12-19-06-Web
>
> --
> Andreas van Hooijdonk
> http://www.gps-practice-and-fun.com
>
>
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| MacArthur 2006-12-24, 10:33 pm |
| "Bob Gardner" <bobmrg@comcast.net> wrote in message
news:_IWdnXIRwZfUXhP
YnZ2dnUVZ_qK3nZ2d@co
mcast.com...
> I'll have to admit to some confusion. I have been to the U. S. Coast
> Guard's West Coast Navigation Center in Petaluma, California and have seen
> eLoran in action. The day I was there, they were tracking 27 stations
> simultaneously, including the one on St. Paul Island in Alaska that I put
> on the air while on active duty in 1961. Googling "enhanced Loran" will
> deliver a ton of information. The Coast Guard has completed updating its
> transmitters and timers...what we lack in the US is enough publicity about
> the service for the manufacturers of GPS units to develop combination
> loran-GPS units. I visited Locus, Inc., in Madison, Wisconsin, the company
> that developed the all-in-view receiver, and saw such a unit in action.
>
> The writer of the article seems unaware of what is going on in the US.
>
> Bob Gardner
>
> "Andreas van Hooijdonk" <ahooijdz@scarletz.bez (NoZ)> wrote in message
> news:YvWdne- Fbpi_RhDYnZ2dnUVZ8tu
3nZ2d@scarlet.biz...
>
The latest edition of Inside GNSS covers the eLORAN issue.
http://www.insidegnss.com/issues/eight/news_loran.php
--
Live strong and have a nice day, - "Nil carborundum illegitimi"!
Mac
Over 1600 Links at Http://MacArthur.Funknstyle.Com
Pictures at http://www.flickr.com/photos/macarthur
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| Bob Gardner 2006-12-25, 3:33 pm |
| Another comment, if I may:
FreeFlightSystems, of Waco, Texas (run by the people who used to be
Trimble), has done flight tests comparing the accuracy of enhanced loran
with that of GPS and found them to be equivalent. The Federal Aviation
Administration says that eLoran meets the 0.3nm standard that GPS provides.
Bob Gardner
"Andreas van Hooijdonk" <ahooijdz@scarletz.bez (NoZ)> wrote in message
news:YvWdne- Fbpi_RhDYnZ2dnUVZ8tu
3nZ2d@scarlet.biz...
> Here is the full article:
>
> http://www.fcw.com/article97163-12-19-06-Web
>
> --
> Andreas van Hooijdonk
> http://www.gps-practice-and-fun.com
>
>
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| Ron Lee 2006-12-25, 10:33 pm |
| "Bob Gardner" <bobmrg@comcast.net> wrote:
>Another comment, if I may:
>
>FreeFlightSystems, of Waco, Texas (run by the people who used to be
>Trimble), has done flight tests comparing the accuracy of enhanced loran
>with that of GPS and found them to be equivalent. The Federal Aviation
>Administration says that eLoran meets the 0.3nm standard that GPS provides.
>
Actually the 0.3 nm is probably tied to performing a non-precision
approach (NPA). Personally, I do not believe that LORAN should have
to meet that standard since its highest value (besides timing) is
providing en route navigation to GA pilots and other users.
If LORAN or eLORAN can support a NPA...fine. Just don't make it a
requirement to continue LORAN.
Once the FAA/DOT makes a commitment to LORAN then we can see hybrid
GPS/LORAN receivers for GA pilots. Maybe other users as well.
Ron Lee
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| Bob Gardner 2006-12-25, 10:33 pm |
| Well, there is the famous "Mineta letter," in which he stated his intention
to fully fund eLoran....but we know what happened to him.
You're right about the NPA thing. I don't think that anyone has precision
eLoran approaches in mind.
Bob
"Ron Lee" <nospamronlee@pcisys.net> wrote in message
news:459051c4.2051437@news.pcisys.net...
> "Bob Gardner" <bobmrg@comcast.net> wrote:
>
> Actually the 0.3 nm is probably tied to performing a non-precision
> approach (NPA). Personally, I do not believe that LORAN should have
> to meet that standard since its highest value (besides timing) is
> providing en route navigation to GA pilots and other users.
>
> If LORAN or eLORAN can support a NPA...fine. Just don't make it a
> requirement to continue LORAN.
>
> Once the FAA/DOT makes a commitment to LORAN then we can see hybrid
> GPS/LORAN receivers for GA pilots. Maybe other users as well.
>
> Ron Lee
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Ron Lee wrote:
>
> Once the FAA/DOT makes a commitment to LORAN then we can see hybrid
> GPS/LORAN receivers for GA pilots. Maybe other users as well.
Locus (<http://www.locusinc.com> ) has some nice boxes.
> Ron Lee
Happy Holidays to you and yours, Ron!
Regards,
Jon
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