 Since the reference receiver has no way of
knowing which of the many available satellites a roving receiver might be using to
calculate its position, the reference receiver quickly runs through all the visible
satellites and computes each of their errors.
Then it encodes this information into a standard format and transmits it to the roving receivers.
It's as if the reference receiver is saying: "OK everybody, right now the signal
from satellite #1 is ten nanoseconds delayed, satellite #2 is three nanoseconds delayed,
satellite #3 is sixteen nanoseconds delayed..." and so on.
The roving receivers get the complete list of
errors and apply the corrections for the particular satellites they're using.
On to the Next Section |
