On 22/4/23 15:54, Roger Clarke wrote:
... So you're suggesting that the chairman of the NFF
farming systems committee was having a lend of a city reporter ...
An increase in cost of 4% is significant, but that is far from being
unable to plant a crop. If this function is critical, the farmer could
purchase a navigation system which does not depend on the US GPS system.
Other satellite navigation networks exist, as well as ground based
radio, & laser systems. Low cost LoRa digital radio networks have been
tested for navigation. Their 100m accuracy (Fargas & Petersen,2017)
should improve at short range on a farm. Newcastle company CORE
Electronics sells LoRa equipment.
https://core-electronics.com.au/wireless/lora/gateways.html
Reference
Fargas, B. C., & Petersen, M. N. (2017, June). GPS-free geolocation
using LoRa in low-power WANs. In 2017 global internet of things summit
(Giots) (pp. 1-6). IEEE.
https://backend.orbit.dtu.dk/ws/portalfiles/portal/130478296/paper_final_2.pdf
--
Tom Worthington, http://www.tomw.net.au
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