Hi Folks, My memory vaguely recalls some discussion regarding selective availability (the scrambling of signals) being turned off in the not so distant future. Is this true, or are we stuck with differential GPS if we want accuracy? Thanks, Kevin ps. Are there any handheld D-GPS systems suitable for kayaking? ------------------------------- | Kevin Whilden | | kwhilden_at_seanet.com | | Kayak Academy Instructor | | http://www.halcyon.com/kayak | ------------------------------- *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************
OOOPs Forgot part 2: I have had excellent luck with the Garmin 12XL series. I started with the 12XL and went to the 12CX and now the 12MAP. It's accurate, waterproof and rugged. ps. Are there any handheld D-GPS systems suitable for kayaking? ------------------------------- | Kevin Whilden | | kwhilden_at_seanet.com | | Kayak Academy Instructor | | http://www.halcyon.com/kayak | ------------------------------- *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************
Most GPSs are typically accurate to 50 feet under normal conditions. Also, you need to be in an area where they are broadcasting the DGPS signal. cu -----Original Message----- From: owner-paddlewise_at_lists.intelenet.net [mailto:owner-paddlewise_at_lists.intelenet.net] On Behalf Of K. Whilden Sent: Thursday, September 23, 1999 2:21 PM To: paddlewise_at_lists.intelenet.net Subject: [Paddlewise] GPS selective availability Hi Folks, My memory vaguely recalls some discussion regarding selective availability (the scrambling of signals) being turned off in the not so distant future. Is this true, or are we stuck with differential GPS if we want accuracy? Thanks, Kevin ps. Are there any handheld D-GPS systems suitable for kayaking? ------------------------------- | Kevin Whilden | | kwhilden_at_seanet.com | | Kayak Academy Instructor | | http://www.halcyon.com/kayak | ------------------------------- *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ *************************************************************************** *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************
In 1996 a Presidential Directive was signed calling for the elimination of S/A within 10 years (2006). Indicators are that we will see it shut off before then but certainly not within the next year. The DOD is in control of this issue but given the PDD they are now required to grovel in front of Congress every year come budget time. It is not a comfortable thing for the Air Force/DOD. One issue keeping S/A on is the (increased) securing of the "P" code which is the military-secure system. For now (S/A on), you may see up to 100 meters of random error on GPS unless you use Differential. For the most part you see the system perform to within 15 meters today but just be aware that there may be some further error. When S/A finally does go away, autonomous (non differential) GPS is a 15 meter solution (50 feet) Tom *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************
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