> As an aside, I have been unable to get my hands on any modern multi-frequency GPS receivers. If someone has a link to one that I can buy with a credit card, I would love it!
Try SwiftNav or Tersus. I have not used either of them so I can't comment on the quality, but $1-2k for an RTK setup is pretty great. They are both more 'startup' than traditional suppliers.
uBlox F9 looks good but isn't quite available yet. They have a solid line of single frequency receivers so I'm looking forward to seeing pricing.
I have briefly tested some Unicorecomm from China, and they work well, but they miss your online store requirement, and the documentation is nonexistent.
I'd suggest Yocto is the de facto standard for this kind of embedded device. It's a bit complex behind the scenes but general building and updating packages is fairly straightforward.
Bringing up the edison is very easy. The bootloader supports DFU, so you can simply connect USB, reset, and flash the system images.
If you're coming at it from a higher level, it has a node.js and ssh services running by default, so it's easy to start tinkering.
The Pandora [1] is a few years old at this point. I had one for a short while and wasn't too impressed. There will be an update called the Pyra [2] coming later this year.
I'm not sure if you are joking or not. But if it's true, that was a nice revenge (with tools that self destruct) by Apple against Samsung. Intentional or not... Lol.
As mentioned in the sibling, media codec is the nominal case. They are included in the SOC, not something specific to this project.
Being ARM Cortex processors, they are 32 bit. Allocate them a chunk of RAM, upload a program and set them running. TI has a driver infrastructure and sample gstreamer CODECs.
It was in mid 90s, but I can guarantee you that I sat next to a math PhD guy who worked exactly on what I described, including the dam deployment. Single receiver, 3mm precison from 3-4 hours of data, no DGPS. This wasn't in the US though.
Very interesting data. It was cool to notice some graphs had much higher variability and then notice that they were all sites that are far from the equator. Then the article helpfully explained precisely why they had more variance!
They are referring to integer ambiguity resolution, which is the final step in getting a dual-frequency differential GPS position down to centimeter accuracy.
This [1] is a good explanation. It does require a GPS receiver capable of carrier phase tracking, which your cell phone isn't capable of. The cheapest I've seen is this uBlox [2].
Do you have any references for the ground-satellite abilities for 5G? I couldn't turn up anything on Google.
Locata [1] has been in the high-end space for a while. I had heard of a lower-end approach too, though the name escapes me, and they were only getting ~50cm.
Edit: The other one I was thinking of was decaWave [2], they claim 20cm in 2 dimensions.
I would like to see some location improvements in 5G, but I've no idea on whether or not they will
be there. (The little I've heard on 5G has been from non-technical types, always as a buzzword).
From my limited knowledge it would nice if they provided a signal somewhat similar to GPS.
Perhaps at a low frequency, as to avoid reflections and attenuation (or just a UWB signal).
The main advantage of having this together with 5G would be deployment, we would piggyback a location system
on top of 5G.
Back to your comment, I did know about DecaWave, but not Locata.
Locata looks interesting, it really does seem like GPS brought to earth.
One good thing about GPS type systems is how well they scale. The satellites just provide
the signal, they don't even have to know how many receivers are out there. (Also good from a privacy standpoint.)
DecaWave system is loosely based on IEEE 802.15.4a, which uses UWB. I think it
does two-way ranging (basically a very precise ping). And since they use UWB, their
system seems to be quite resilient to multipath.
Try SwiftNav or Tersus. I have not used either of them so I can't comment on the quality, but $1-2k for an RTK setup is pretty great. They are both more 'startup' than traditional suppliers.
uBlox F9 looks good but isn't quite available yet. They have a solid line of single frequency receivers so I'm looking forward to seeing pricing.
I have briefly tested some Unicorecomm from China, and they work well, but they miss your online store requirement, and the documentation is nonexistent.