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-   -   Don't throw away your map and compass (http://www.fitnessbanter.com/showthread.php?t=61852)

Bernard May 19th 09 01:21 PM

Don't throw away your map and compass
 
According to a Guardian article, GPS satellites could start failing next
year.

http://www.guardian.co.uk/technology...e-to-breakdown


Chris Gilbert[_4_] May 19th 09 01:27 PM

Don't throw away your map and compass
 
Bernard wrote

According to a Guardian article, GPS satellites could start failing next
year.


GPS ? What's that ?

;-)

Chris
--
Photography by Chris Gilbert
www.ravenseyegallery.co.uk
Internet life support for small businesses
www.ravenseye.plus.com
Affordable web sites
www.sitegateway.net



Peter Clinch May 19th 09 02:11 PM

Don't throw away your map and compass
 
Yoss1960 wrote:

rhetorical
And does anybody *seriously* believe that there are no plans to replace
those that do fail?
/rhetorical


"It is uncertain whether the Air Force will be able to acquire new
satellites in time to maintain current GPS service without
interruption," said the report, presented to Congress. "If not, some
military operations and some civilian users could be adversely affected."

It's not "if", but "when". You can't just order up a couple of new ones
from Screwfix for delivery by the weekend...

Pete.
--
Peter Clinch Medical Physics IT Officer
Tel 44 1382 660111 ext. 33637 Univ. of Dundee, Ninewells Hospital
Fax 44 1382 640177 Dundee DD1 9SY Scotland UK
net http://www.dundee.ac.uk/~pjclinch/

Phil Cook[_2_] May 19th 09 03:00 PM

Don't throw away your map and compass
 
Peter Clinch wrote:

Yoss1960 wrote:

rhetorical
And does anybody *seriously* believe that there are no plans to replace
those that do fail?
/rhetorical


"It is uncertain whether the Air Force will be able to acquire new
satellites in time to maintain current GPS service without
interruption," said the report, presented to Congress. "If not, some
military operations and some civilian users could be adversely affected."

It's not "if", but "when". You can't just order up a couple of new ones
from Screwfix for delivery by the weekend...


I think the constellation of satellites is overpopulated for the
present and will still provide a fix if a few birds were to die.

Just checked and there are 31 at present and the system started with
24.
--
Phil Cook, last hill: Sgurr na Banachdich
http://www.therewaslight.co.uk

Fellwalker May 19th 09 03:03 PM

Don't throw away your map and compass
 
On Tue, 19 May 2009 12:27:43 +0100, "Chris Gilbert"
wrote:

GPS ? What's that ?


something that ships and planes navigate by.:-0
--
Mike "http://www.fellwalk.co.uk"
remove boots to email

Mike Clark May 19th 09 03:15 PM

Don't throw away your map and compass
 
In message
Peter Clinch wrote:

Yoss1960 wrote:

rhetorical
And does anybody *seriously* believe that there are no plans to replace
those that do fail?
/rhetorical


"It is uncertain whether the Air Force will be able to acquire new
satellites in time to maintain current GPS service without
interruption," said the report, presented to Congress. "If not, some
military operations and some civilian users could be adversely affected."

It's not "if", but "when". You can't just order up a couple of new ones
from Screwfix for delivery by the weekend...

Pete.


I'd like to see some quantification of "some" and "affected".

Mike
--
o/ \\ // |\ ,_ o Mike Clark
\__,\\ // __o | \ / /\, "A mountain climbing, cycling, skiing,
" || _`\,_ |__\ \ | caving, antibody engineer and
` || (_)/ (_) | \corn computer user"

Neil[_2_] May 19th 09 05:28 PM

Don't throw away your map and compass
 
In message , Bernard
writes
According to a Guardian article, GPS satellites could start failing
next year.

http://www.guardian.co.uk/technology...e-to-breakdown


From HIPAR at sci.geo.satellite-nav:

"This situation has been recognized for a few years. Fortunately there
have been no 'wholesale' failures of the oldest satellites. The
engineers seem to find ways to keep them working. So, even with the
various delays, decommissionings and replenishments have maintained
parity.

IIRM-20 appears to be coming under control and don't forget there
remains one IIR satellite in the barn. It can be targeted for the most
vulnerable orbital slot.

There is also reference to the first IIF satellite finally having been
delivered for launch latter this year. That's good news because getting
the first item working is most difficult part of a
developmental/production program.

The GPS Wing and it's contractors should be commended for maintaining
the current constellation. I think the alarming GAO report is overly
pessimistic."

Regards,
--
Neil Pugh


Martin Richardson May 19th 09 09:14 PM

Don't throw away your map and compass
 
In message , Chris
Gilbert writes
Bernard wrote

According to a Guardian article, GPS satellites could start failing next
year.


GPS ? What's that ?

;-)

Group of people you find in your local surgery


--
Martin Richardson
56/220 Corbetts - 25% 772/1555 Marilyns - 49.6%
118/211 Irish Hewitts - 56% 107/118 New Donalds - 91%



Bill Grey May 19th 09 10:22 PM

Don't throw away your map and compass
 
In message , Chris
Gilbert writes
Bernard wrote

According to a Guardian article, GPS satellites could start failing next
year.


GPS ? What's that ?

;-)

Chris
--
Photography by Chris Gilbert
www.ravenseyegallery.co.uk
Internet life support for small businesses
www.ravenseye.plus.com
Affordable web sites
www.sitegateway.net


Gilbert's Photo Services
--
Bill Grey


Bill Grey May 19th 09 10:23 PM

Don't throw away your map and compass
 
In message , Peter Clinch
writes
Yoss1960 wrote:

rhetorical
And does anybody *seriously* believe that there are no plans to replace
those that do fail?
/rhetorical


"It is uncertain whether the Air Force will be able to acquire new
satellites in time to maintain current GPS service without
interruption," said the report, presented to Congress. "If not, some
military operations and some civilian users could be adversely affected."


Let's hope the devotees get off the hills before it happens :-)
--
Bill Grey



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