davidroberts30
Member
- Location
- pembrokeshire
im sorry but if you've gone to the trouble to set up a base and broadcast it publicly and turn it off to stop locals using it that's about as petty as you can get, especially if your running agopen
How to set up your own RTK base station.. for about £300
- Thread starter andyinv
- Start date
It would be, but likely just turn off as they don’t need it themselves in the winter and don’t really think.
or possibly thinking they’re saving power/data
Or someone turns a plug off, oblivious to what its powering.
davidroberts30
Member
- Location
- pembrokeshire
hopefully something simple
Think I've got to the bottom of this, it depends on the Age of the correction, my own base station is sending a correction every second, the commercial VRS one every ten seconds the other every 30 seconds (or at least that was the Age of correction reported in AOG).
When the Age of correction was sub ten seconds it was spot on with my RTK2Go base station when it was 45 seconds or more it was upto 10cm difference.
- Location
- Darlington
My ONE and only brush with a home base station, was with a chinese one, instructions said remove batteries when finnished using it. Put them back in next time you need it.So did that several times, each time the tram lines had moved several centimetres, HUH, so much for rtk. got onto dealer,must be my fault, roving specislist,must be me, They got onto china............................NOT ME. yea, hmmmm.
leave it on 24/7 /365/6 days.
leave it on 24/7 /365/6 days.
clbarclay
Member
- Location
- Worcestershire
Was that base station surveying it's location every time it was turned on?
- Location
- Darlington
No idea, just expected it to be correct.
clbarclay
Member
- Location
- Worcestershire
I've not noticed any drift when mine is turned off and on, but it doesn't move only surveyed once.
Must save and fix location on first survey.
Will have relative accuracy always then, just not absolute.
- Location
- our house, Norn Iron
There's men would do it, was a man bought a place local, didn't come from far away either but he sold his old place, then lifted all the field gates off & brought them to the new place.
Hopefully some of the above.
- Location
- East yorks
Base stations especially mobiles normally do a very rough survey to get an average point they are using uncorrected GNSS afterall which they then use as there reference. They normally save that and then rely on you putting it back in the exact same place, ie weld a bolt on a gate post etc. If you don;t and have it on say a tripod which you think is almost in then same place then the tramlines will move by the error between the orgional and where it is now. A base station won;t be true to a real on ground coordinate unless it does a long average say 24hrs before use or is compared to a known network
- Location
- Darlington
Made a braket from 5" pylon angle iron bolted to a concret pillar. Don`t think it was capable of moving a midges whatsit. 
You need to be careful with survey-in on a mobile base station. Once it achieves what it thinks is a good enough fix on a static position (eg concrete post) you'll need to get its location and keep a note. When you return to that location another time, put those co-ordinates in and forget the survey.
It's a guarantee that two survey-in operations at the same point will not be centimeter accurate as survey-in is essentially a "best guess over time". You can't rely on it to get an exact reading for your fixed location, and that's why it will drift.
I'm not aware of many that will keep a list of surveyed co-ordinates at multiple locations, which if you're using a mobile base is what you'd need.
Think of a mobile base station as "accurate for reference until you move it". It'll stop your line drifting until you turn it off.
It's a guarantee that two survey-in operations at the same point will not be centimeter accurate as survey-in is essentially a "best guess over time". You can't rely on it to get an exact reading for your fixed location, and that's why it will drift.
I'm not aware of many that will keep a list of surveyed co-ordinates at multiple locations, which if you're using a mobile base is what you'd need.
Think of a mobile base station as "accurate for reference until you move it". It'll stop your line drifting until you turn it off.
Is there many that have land that far away from home that a mobile is beneficial? How do the spangly JD ones work? At their prices they’d want to be accurate
Sf1 is basic 15cm pass to pass accuracy, but no repeatability (come back next week and guidance lines will of moved, lots)
SF2 is 5cm pass to pass, again no repeatability
SF3 is 3cm pass to pass, repeatable for a few months,
all of these corrections are satellite based, and increasing cost with accuracy, but none any good for mapping field boundaries and permanent tramlines.
If you've land far away from home a VRS RTK signal is best, it uses professionally maintained and surveyed CORS reference base stations about every 60km, it can then triangulate the corrections from the nearest CORS stations to calculate what the corrections would be for a base station right next to you, so they can give 15mm accuracy.
The VRS RTK signal will be NTRIP just like we use with Rtk2go.
It’s all very interesting, thanks for the explanation.
I think it’s the repeatability is the biggest draw for me over even the accuracy. Having to set ab like every time out with the Trimble was an annoyance.
Hi all,
I am in the early stages of AgOpen and am looking to start putting a base station together. I may have this wrong but is the below setup the best way of achieving this?
I guess it would be nice if the Raspberry pi and the F9P could be within the same box but i cant figure out if thats possible/wise?
I am in the early stages of AgOpen and am looking to start putting a base station together. I may have this wrong but is the below setup the best way of achieving this?
I guess it would be nice if the Raspberry pi and the F9P could be within the same box but i cant figure out if thats possible/wise?
Attachments
Spot on, and aye it's fine same box
Northern farmer
Member
- Location
- North
Have a look:
GitHub - Stefal/rtkbase: Your own GNSS base station for RTK localization with a Web GUI
Your own GNSS base station for RTK localization with a Web GUI - Stefal/rtkbase
github.com
If the Pi/F9p is further away from a power socket, you can use power over Ethernet.