2011-01-21 15:21:05.405586+00 by Dan Lyke 4 comments
The good news: I'm spending the day learning about really cool technologies! The bad news: It'd be terribly easy to follow the shiny objects off onto a path that has nothing to do with my deliverables...
[ related topics: Current Events Education ]
comments in descending chronological order (reverse):
#Comment Re: made: 2011-01-21 18:43:12.123345+00 by: Dan Lyke
At some point all the GNSS systems have roughly the same issues, so adding receivers from GLONASS is roughly like adding more satellites from GPS; over a certain point you're just summing up more noisy sources. I think the next big breakthrough will be when the L5 frequency comes online for GPS and we have two frequencies from the same satellites that we can use to measure ionosphere variations within the civilian receivers.
#Comment Re: made: 2011-01-21 18:17:50.901113+00 by: ebradway
I wouldn't be surprised if, after surveying the receivers, you find that there are one, maybe two, correction methods. But the same correction methods are marketed under different names, so you waste time hunting down aliases.
Have you looked at the receivers that use multiple satellite systems?
#Comment Re: made: 2011-01-21 17:25:36.658617+00 by: Dan Lyke
This morning I got to the "okay, I now know where the error comes from and how people are correcting for it, now I need to communicate that information to others and survey the available receivers to see what the state of the art in that correction is".
And as mentioned in that other thread, some of this is about things like geologists being okay with a 30 day(!) latency for sub centimeter accuracy.
#Comment Re: made: 2011-01-21 17:03:23.808312+00 by: ebradway [edit history]
Yep. GPS is a geeky rabbit hole. You keep thinking, "GPS is kewl, so it's got to be better than this... I must be missing something."