GPS rover station having position dithering for controlling accuracy of secure positions
First Claim
1. A secure rover station having a controlled accuracy for a geographical position, comprising:
- a rover global navigation satellite system (GNSS) receiver for determining a secure position not available to a user of the rover station; and
a position dither processor for dithering said secure position with a selected non-zero synthetic offset vector for issuing a rover position available to said user having an added position error proportional to said synthetic offset vector.
1 Assignment
0 Petitions
Accused Products
Abstract
A positioning system or synthetic phase processor or rover station for providing high integrity positions with graduated accuracies. The positioning system includes one or more real time kinematic (RTK) reference stations for receiving GPS signals at established reference positions and measuring reference phases. The positioning system or the rover station selects a synthetic offset vector and uses the synthetic offset vector for inferring synthetic reference phases to a synthetic position. The rover station uses the synthetic reference phases with actual or virtual reference positions for determining a rover position having an added positional error controlled by the synthetic offset vector. For another embodiment a secure rover station dithers a secure position with a synthetic offset vector for providing an unsecure rover position having the added positional error.
13 Citations
24 Claims
-
1. A secure rover station having a controlled accuracy for a geographical position, comprising:
-
a rover global navigation satellite system (GNSS) receiver for determining a secure position not available to a user of the rover station; and
a position dither processor for dithering said secure position with a selected non-zero synthetic offset vector for issuing a rover position available to said user having an added position error proportional to said synthetic offset vector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method for controlling accuracy of a geographical position, comprising:
-
receiving a global navigation satellite system (GNSS) signal;
using said GNSS signal for determining a secure position not available to a user of the rover station; and
dithering said secure position with a selected non-zero synthetic offset vector for providing a rover position having an added position error proportional to said synthetic offset vector to said user. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
-
-
17. A tangible medium containing a set of instructions for causing a processor to carry out the following steps for controlling accuracy of a geographical position, comprising:
-
receiving a global navigation satellite system (GNSS) signal;
using said GNSS signal for determining a secure position not available to a user of the rover station; and
dithering said secure position with a selected non-zero synthetic offset vector for providing a rover position available to said user having an added position error proportional to said synthetic offset vector. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
-
Specification