Bundy
Guest
As I have said in previous posts, stick with the guys who make and service this sort of gear, not on-sellers who just put rebadge and paint and flog it off as their own, aka Case, New Holland. They know their equipment and your backup will be so far infront of the local spanner monkey at the Case dealership who has only seen two in his life and one of those were at the workshop he did two years ago. The beauty of yield mapping is that you don't need a subsciption service to get reasonably accurate GPS measurements, as you have what ever width your header is as your buffer for GPS drift. It's not until you require visual_autosteer guidence that you need to pay any extra at all for subsciptions or for RTK base stations. As for accuracy on contours and hillsides, as I said above, you have a reasonable deal of buffer to allow for angles or slope given you are only taking 1-3 readings per 3 seconds and that reading is for the width of the header. Given that, even though the angle of the machine and difference in height between the header and the GPS reciever can give a more inaccurate reading if the grounds not level, it really doesn't matter for yield monitoring. The most important thing is keep the header full, or adjust the width on the monitor otherwise your contour bank yields will read very poor because half the header is swinging in the breeze empty while cleaning up banks. Higher price systems with gyro's and accelerometers will allow for angle, direction and any other variable you want to consider, but you would only want this if you are requiring high accuracy autosteering system on your combine. If someone try's to feed you a story that you "MUST" have a subsciption GPS then they: A: Don't know what they are on about B: Trying to flog you a subscription service you don't need. What ever system you end up with, make sure it can be use with autonomous GPS (non subscription, the same system that the little handheld or car navigation systems use) or if you are lucky enough to get the free WAAS system, even better.