Abstract: A method and system for performing attitude determination for an array of receivers in a navigational positioning system are described. A navigational positioning system includes an array of receiver antennas that simultaneously receive signals emitted from satellites or other fixed or moving sources. A first set of potential solutions for a first baseline vector and a second set of potential solutions for a second baseline vector determined. Each baseline vector corresponds to any pair of receiver antennas in the array. The baseline vector comprises both the scalar distance between the antennas and the orientation of the line between the antennas in a geospatial coordinate frame. In one embodiment, test results are obtained for at least two tests performed on each potential solution in a set of potential solution. Each potential solution in the sets of potential solutions is evaluated as a candidate for a correct solution for the corresponding baseline vector.