It should be noted that Pharos GPS receivers cannot mask for PDOP and do not collect files suitable for differential correction
. As indicated in Table 1, the lack of the ability to differentially correct the data is reflected in the relatively large decrease in accuracy compared to its precision.
Private companies have set up their own differential correction
systems, such as Deere and Co.'s StarFire.
The regression equations that related the elevations measured with the Trimble AgGPS [TM] 132 receiver (y) with the differential correction
turn on to benchmark elevations (x) were:
Accuracy of GPS telemetry collar locations with differential correction
. Journal of Wildlife Management 61:530-539.
The basestation, used to improve the accuracy of positions collected in the field through differential correction
, is located in a room within the Geography Building.
allows the trucks to accurately navigate haul roads.
This same differential correction
can be applied to any rover receiver tracking the same satellites at that instant in time.
These are things such as the Ordnance Survey's OS Net, which provides differential corrections
to GNSS signals (such as GPS) to bring that GNSS location provision down to sub-metre accuracy.