Kerry.

All things are relative to cost and basically refinements in the software capability. Still only a single frequency receiver with accuracy dependent on the mode of operation. Cheers, Kerry. I never get lost everybody keeps telling me where to go

quote:Originally posted by quasar: I had presumed that all datums would use the equator and greenwich meridian as an origin, so the line would be the same in all of them. Can anyone shed some light on this? The equator (as such 0 deg's) is a moving target as far as the datum is concerned. The equator "follows" the datum not the other way round. Cheers, Kerry. I never get lost everybody keeps telling me where to go

quote:Originally posted by quasar: I had presumed that all datums would use the equator and greenwich meridian as an origin, so the line would be the same in all of them. Can anyone shed some light on this? The equator (as such 0 deg's) is a moving target as far as the datum is concerned. The equator "follows" the datum not the other way round. Cheers, Kerry. I never get lost everybody keeps telling me where to go

That sort of "general" accuracy is a little (long) way off for now. But even when accuracy gets sub 1-1.5m some countries have actually "moved" close to that in the past 10-15 years relative to the system and local coords. Oh, what a worry that will be Cheers, Kerry. I never get lost everybody keeps telling me where to go

That sort of "general" accuracy is a little (long) way off for now. But even when accuracy gets sub 1-1.5m some countries have actually "moved" close to that in the past 10-15 years relative to the system and local coords. Oh, what a worry that will be Cheers, Kerry. I never get lost everybody keeps telling me where to go

quote:Originally posted by leatherman: Your two little snippits didn't contribute anything to this discussion. You just popped in to heckle others. Why not give your expert opinion to CivilWarRanger, like he asked. If you want to discuss averaging start your own string. On second thoughts the original poster was requesting "pro's and con's" so it is appropraite that averaging and auto averaging be discussed as far the models mentioned are concerned. Like I've said I would be interested in your comments regarding the pro's and con's, maybe Civilwarranger would be too as that is what was really requested "pro's and con's". Cheers, Kerry. I never get lost everybody keeps telling me where to go

quote:Originally posted by leatherman: Your two little snippits didn't contribute anything to this discussion. You just popped in to heckle others. Why not give your expert opinion to CivilWarRanger, like he asked. If you want to discuss averaging start your own string. On second thoughts the original poster was requesting "pro's and con's" so it is appropraite that averaging and auto averaging be discussed as far the models mentioned are concerned. Like I've said I would be interested in your comments regarding the pro's and con's, maybe Civilwarranger would be too as that is what was really requested "pro's and con's". Cheers, Kerry. I never get lost everybody keeps telling me where to go

New post, new subject and now your opinion on Magellans Auto Averaging if you would please. Cheers, Kerry. I never get lost everybody keeps telling me where to go

New post, new subject and now your opinion on Magellans Auto Averaging if you would please. Cheers, Kerry. I never get lost everybody keeps telling me where to go

quote:Originally posted by Alan2:If a GPS loses sats so only two locations are receiving, couldn't the GPS assume its location anyway. I thought with two satsw, there are two possible locations in the world that you can be at. Since the GPS just knew your last position, couldn't the program be written to just "assume" the "correct" position based on two sats? With 2 sats you can solve for 2 unknowns but for a "fix" (2D) one requires to solve for 3 things (X,Y & Time). Take either one of them knowns away and it's anybodies guess where one is or which way one is even going. Cheers, Kerry. I never get lost everybody keeps telling me where to go

quote:Originally posted by Alan2:If a GPS loses sats so only two locations are receiving, couldn't the GPS assume its location anyway. I thought with two satsw, there are two possible locations in the world that you can be at. Since the GPS just knew your last position, couldn't the program be written to just "assume" the "correct" position based on two sats? With 2 sats you can solve for 2 unknowns but for a "fix" (2D) one requires to solve for 3 things (X,Y & Time). Take either one of them knowns away and it's anybodies guess where one is or which way one is even going. Cheers, Kerry. I never get lost everybody keeps telling me where to go

quote:Originally posted by leatherman: Still nothing intellegent added to this discussion. Well some have made some straight up comments, some I've agreed with (which I've stated) and some I don't (which I've also stated) so if you have any problems with that then that's tough. My comment "Majbach, ah some reality, that shouldn't hurt any feelings" Your smart arse reply "So Kerry knows where to go. I'll disregard your useless little comments. 66 posts no finds or hides. Hmm your alter ego? So you can make all the inflammitory comments you like without anyone knowing who you are" So don't come back to me regarding useless comments. You don't like my agreement then you may as well direct your comments wider. Cheers, Kerry. I never get lost everybody keeps telling me where to go

quote:Originally posted by leatherman: Still nothing intellegent added to this discussion. Well some have made some straight up comments, some I've agreed with (which I've stated) and some I don't (which I've also stated) so if you have any problems with that then that's tough. My comment "Majbach, ah some reality, that shouldn't hurt any feelings" Your smart arse reply "So Kerry knows where to go. I'll disregard your useless little comments. 66 posts no finds or hides. Hmm your alter ego? So you can make all the inflammitory comments you like without anyone knowing who you are" So don't come back to me regarding useless comments. You don't like my agreement then you may as well direct your comments wider. Cheers, Kerry. I never get lost everybody keeps telling me where to go

So that's a "No Comment" is it, but that I can understand especially with regard some of the other comments. As for averaging and Magellans well obviously your a little new around here Cheers, Kerry. I never get lost everybody keeps telling me where to go

So that's a "No Comment" is it, but that I can understand especially with regard some of the other comments. As for averaging and Magellans well obviously your a little new around here Cheers, Kerry. I never get lost everybody keeps telling me where to go

Well Leatherman you just on making all the assumptions you like (ever used a GPS what's a GPS ) but one thing for sure I certainly don't have to explain any of my background to you regardless of what you think. So what's your "opinion" of the great auto averaging funtion. Cheers, Kerry. I never get lost everybody keeps telling me where to go

Well Leatherman you just on making all the assumptions you like (ever used a GPS what's a GPS ) but one thing for sure I certainly don't have to explain any of my background to you regardless of what you think. So what's your "opinion" of the great auto averaging funtion. Cheers, Kerry. I never get lost everybody keeps telling me where to go

Mvwood, Really J-Track is not going to give one the information that one really needs/wants to know (in general) as far as being in the right place at the right time. BIIA-15 is more than likely a Mission# as II-15 (launched Sep 9, 1992 & operational Sep 30, 1992) is also known as SVN#27 and PRN#27. Normally it's the PRN# (max allowed 32) that most GPSR's show on a satellite screen. Just to confuse things more SVN & PRN numbers aren't necessarily the same as sats eventually are replaced with new ones. GPS sat IIR-3 (launched Oct 6, 1999) is designated SVN#46 and PRN#11. Also GPS I-8 (launched Jul 14, 1983) was known as PRN#11, SVN#8 but of course is one of the original Block I sats which is now dead an it's slot replaced by SVN#46. Cheers, Kerry. I never get lost everybody keeps telling me where to go

Mvwood, Really J-Track is not going to give one the information that one really needs/wants to know (in general) as far as being in the right place at the right time. BIIA-15 is more than likely a Mission# as II-15 (launched Sep 9, 1992 & operational Sep 30, 1992) is also known as SVN#27 and PRN#27. Normally it's the PRN# (max allowed 32) that most GPSR's show on a satellite screen. Just to confuse things more SVN & PRN numbers aren't necessarily the same as sats eventually are replaced with new ones. GPS sat IIR-3 (launched Oct 6, 1999) is designated SVN#46 and PRN#11. Also GPS I-8 (launched Jul 14, 1983) was known as PRN#11, SVN#8 but of course is one of the original Block I sats which is now dead an it's slot replaced by SVN#46. Cheers, Kerry. I never get lost everybody keeps telling me where to go

Majbach, ah some reality, that shouldn't hurt any feelings Cheers, Kerry. I never get lost everybody keeps telling me where to go

Majbach, ah some reality, that shouldn't hurt any feelings Cheers, Kerry. I never get lost everybody keeps telling me where to go

There is specific GPS mission planning software but normally more for commercial applications. It's not simply the number of Sats, but also the geometry and relations to obstructions etc. Cheers, Kerry. I never get lost everybody keeps telling me where to go

There is specific GPS mission planning software but normally more for commercial applications. It's not simply the number of Sats, but also the geometry and relations to obstructions etc. Cheers, Kerry. I never get lost everybody keeps telling me where to go

quote:Originally posted by leatherman:The Magellan units will continue reading even if you drop down to just two sattilites. Nah, no way known will any GPS continue to navigate with only 2 sats. Cheers, Kerry. I never get lost everybody keeps telling me where to go

quote:Originally posted by leatherman:The Magellan units will continue reading even if you drop down to just two sattilites. Nah, no way known will any GPS continue to navigate with only 2 sats. Cheers, Kerry. I never get lost everybody keeps telling me where to go