The GPS receiver onboard the quadcopter would do the processing to determine the position. How you use that position data is up to you. One RTK base station can be used by thousands of rovers if the data stream is broadcast via radio.
The almanac is part of the data stream from each satellite. All GNSS receivers download the almanac for each constellation because that tells the receiver where the satellites are at. Both bases and rovers use this information. Correction data (either from your own base or a subscription to someone else's base) is data about how much error there is in the signal from each satellite.
Is there a list of all the RTK bass stations throughout the country that can be accessed via Cat M1 modems attached to the device using the GPS RTK module? Thanks for your vids!
No, there isn't a single list of bases. Some states provide access to a state-owned RTK network, numerous private companies have networks that are available via subscription, and there are probably many more private networks.
Thanks , that is the clearest RTK video I've seen yet. I want to build a DIY RTK basestation using RTKLIB, a raspberry pi 2 and a ublox M8N (and later a M8T or better) gps receiver. My neighbour has a farm with several Starfire 450 RTK GPS linked via point to point radiomodem links with repeaters. I would like to show him how to replace the radio direct link with a cellular radio link (I have made GSM/GPRS serial transmitter radio with a SIM800L chip & an arduino). Do you know what is the data protocol that his Starfire 450 uses ? Am I going to be able to output from my RTKLIB basestation to his starfire 450 gps rovers if I had the right radio transmitter (I think it's a 450mhz radiomodem (unknown exact type))?
Thanks Lance. Great video. Is there a system that would allow me to locate / stake out ~60 hole locations in sub-cm for not too much money? Or am I dreaming?
Assuming you have a RTK-capable GPS receiver, there are apps that will help you map out points on a grid. If you need to buy a RTK receiver, then you'll have a lot more invested in the project.
Thanks for the fantastic video. Three quastions: 1) how are referent stations connected with rtk server?(radio link, internet, physically...) 2) how can EGNOS be connected with RTK network? 3) NTRIP client is next to the rover(?) and NTRIP server is next to the RTK server(?), where is NTRIP caster? I am sorry if those quastions are stupied :)
Can you explain the process (in layman terms) as to how the corrections from the satellites get from the base stations through the site servers through the network server to the rover? How does the PROXY server and XPOS server play into the network?
what kind of computing power is needed? could an RTK system be used to control quadcopter swarms in an outdoor area, say a football field? or do you think it would be too many numbers to crunch in real time?
in gsm/gps car tracking system,is the gps receive signal directly from the satellite or it need to have base station(ground station)again? i'm confused. pls help. advance thanks.
dangerous woman The GPS signal is coming from the satellite, the correction data is coming in from your GSM connection, which is coming from the base station, so your gps and the base station are connected to the same satellites but with RTK the base station sends correction data to whatever Rover GPS wants it. I feel like I may have made it more confusing.... Basically the old way to do this was you needed to have both a regular GPS and set up a base station GPS that talked to each other of a radio signal, today there are base station service providers that have set up permanent base stations so all you need is your GPS that is connected over cellular connection to their correction data.
Great presentation. Two quick questions. [1] If, for example, I built a 'rover', do my rover just tune to the satellite frequencies and get the almanac data for free or do I have to subscribe to some type of almanac decoding services?. [2] I will also like to know how that applies to correctional services too. Any reputable examples of companies that provides those kinds of subscriptions?
