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#1
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#2
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Maybe this is just my own personal read, but doesn't this sound like
sabre-rattling at the EU's Magellan project more than anything else? Especially since the initial test satellite is scheduled to be launched in October. And where has DGPS gone? Amgine SailWiki http://wiki.saewyc.net |
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#3
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On Thu, 16 Dec 2004 14:15:56 -0500, "Amgine"
wrote: Maybe this is just my own personal read, but doesn't this sound like sabre-rattling at the EU's Magellan project more than anything else? Especially since the initial test satellite is scheduled to be launched in October. And where has DGPS gone? Actually, Magellan is the best guarantee of GPS continuity. It keeps political pressure on the US to keep it going, even if GLONASS fizzles out. Most sailors don't need DGPS with WAAS working and SA not. But, if you have a DBR it will still do what it always did AFIK, with the same CG beacons. I haven't bothered to wire mine up in recent years. Rodney Myrvaagnes NYC Let's Put the XXX back in Xmas |
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#4
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"Amgine" wrote in message lkaboutboats.com... Maybe this is just my own personal read, but doesn't this sound like sabre-rattling at the EU's Magellan project more than anything else? Especially since the initial test satellite is scheduled to be launched in October. And where has DGPS gone? It has been pretty much replaced by WAAS. I wouldn;t be surprised if they discontinued DGPS in the near future. I still use mine but I would get a WAAS in a second if/when DGPS goes away. Amgine SailWiki http://wiki.saewyc.net |
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#5
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Actually WAAS is DGPS...Jim
"Doug Dotson" wrote in message ... "Amgine" wrote in message lkaboutboats.com... Maybe this is just my own personal read, but doesn't this sound like sabre-rattling at the EU's Magellan project more than anything else? Especially since the initial test satellite is scheduled to be launched in October. And where has DGPS gone? It has been pretty much replaced by WAAS. I wouldn;t be surprised if they discontinued DGPS in the near future. I still use mine but I would get a WAAS in a second if/when DGPS goes away. Amgine SailWiki http://wiki.saewyc.net |
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#6
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No it isn't.
"Jim Donohue" wrote in message news  aPwd.83$iD.50@fed1read05...Actually WAAS is DGPS...Jim "Doug Dotson" wrote in message ... "Amgine" wrote in message lkaboutboats.com... Maybe this is just my own personal read, but doesn't this sound like sabre-rattling at the EU's Magellan project more than anything else? Especially since the initial test satellite is scheduled to be launched in October. And where has DGPS gone? It has been pretty much replaced by WAAS. I wouldn;t be surprised if they discontinued DGPS in the near future. I still use mine but I would get a WAAS in a second if/when DGPS goes away. Amgine SailWiki http://wiki.saewyc.net |
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#7
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In article paPwd.83$iD.50@fed1read05,
"Jim Donohue" wrote: Actually WAAS is DGPS...Jim Bzzzt Wrong answer. Would you like to try for what is behind Door #3? WAAS is a SAT based Service, whereas DGPS is a MF Terrestrial based Service. Two different things that try to correct the same GPS accuracy. Me |
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#8
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Both are Differential Global Positioning System (DGPS). There are a large
number of ways to get the correcting signals. Nothing changes the fact that they are the same technique implemented by two different communication paths. You can also do differential by modulation of the LORAN signal as is done in Europe. You can also use a local reference by short wave. It is all differential. WAAS is a little more sophisticated but the basics are the same. Try it this way...if the differential signal from a USCG site was forwarded to you by a satellite...say via Iridium...would it cease to be DGPS and turn into WAAS? No I don't think so. I also suggest that "Me" not comment until the question is understood. "Bzzzt Wrong Answer" Jim Donohue "Me" wrote in message ... In article paPwd.83$iD.50@fed1read05, "Jim Donohue" wrote: Actually WAAS is DGPS...Jim Bzzzt Wrong answer. Would you like to try for what is behind Door #3? WAAS is a SAT based Service, whereas DGPS is a MF Terrestrial based Service. Two different things that try to correct the same GPS accuracy. Me |
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#9
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DGPS is a specific service. WAAS is another specific service. They are
not the same thing although both provide diferential corrections. Doug "Jim Donohue" wrote in message news:Yy7xd.379$iD.233@fed1read05... Both are Differential Global Positioning System (DGPS). There are a large number of ways to get the correcting signals. Nothing changes the fact that they are the same technique implemented by two different communication paths. You can also do differential by modulation of the LORAN signal as is done in Europe. You can also use a local reference by short wave. It is all differential. WAAS is a little more sophisticated but the basics are the same. Try it this way...if the differential signal from a USCG site was forwarded to you by a satellite...say via Iridium...would it cease to be DGPS and turn into WAAS? No I don't think so. I also suggest that "Me" not comment until the question is understood. "Bzzzt Wrong Answer" Jim Donohue "Me" wrote in message ... In article paPwd.83$iD.50@fed1read05, "Jim Donohue" wrote: Actually WAAS is DGPS...Jim Bzzzt Wrong answer. Would you like to try for what is behind Door #3? WAAS is a SAT based Service, whereas DGPS is a MF Terrestrial based Service. Two different things that try to correct the same GPS accuracy. Me |
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#10
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On Thu, 16 Dec 2004 13:50:18 -0500, Jeff Morris
wrote: wrote: Have you any idea what "temporary" means in governmentees? Have you any idea how dependent some applications have become on GPS? OffStar? g |
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