Abstract: A GPS system and method for generating precise position determinations. The GPS system includes a ground based GPS reference system which receives with a reference receiver GPS signals and makes phase measurements for the carrier components of the GPS signals. The GPS reference system then generates and broadcasts an initialization signal having a carrier component and a data link signal having a data component. The data component of the data link signal contains data representing the phase measurements made by the reference receiver. The GPS system also includes a GPS mobile system which receives with a mobile position receiver the same GPS signals as were received by the reference system. In addition, the GPS position receiver receives the data link and initialization signals broadcast by the reference system.

Abstract: A method and apparatus for initiating a thrill-seeking ride from a raised access platform, the ride having a water slide descending at a predetermined angle with respect to the platform and wherein the slide has a support or "riding" surface located along a predetermined plane. According to the method, the rider is placed in a substantially erect position within a housing while the housing is located at a first position on the raised access platform. The housing has at least a back and a releasable bottom. Thereafter, the housing with the rider therein is extended from the first position on the raised access platform to a second position wherein the back of the housing is substantially aligned with the predetermined plane of the slide support surface. The bottom of the housing is then released to drop the rider onto the water slide.

Abstract: A GPS system and method for generating precise position determinations. The GPS system includes a ground based GPS reference system which receives with a reference receiver GPS signals and makes phase measurements for the carrier components of the GPS signals. The GPS reference system then generates and broadcasts an initialization signal having a carrier component and a data link signal having a data component. The data component of the data link signal contains data representing the phase measurements made by the reference receiver. The GPS system also includes a GPS mobile system which receives with a mobile position receiver the same GPS signals as were received by the reference system. In addition, the GPS position receiver receives the data link and initialization signals broadcast by the reference system.