| Patent Number |
Title Of Patent |
Date Issued |
| 6092022 |
Optimal survey map projection system |
July 18, 2000 |
| Methods for providing a representation of location coordinates for a collection of survey points with enhanced accuracy. An obliquely oriented cylindrical surface, rather than a tangent plane, is determined and used as the projection surface at or near a survey base point, with the angul |
| 5987383 |
Form line following guidance system |
November 16, 1999 |
| A first form line is defined using two or more terrestrial locations. The first form line may be predefined or may be defined by user during a spraying operation. A second form line is then computed using positioning data obtained while following the first form line and a swathing offset |
| 5983159 |
Location determination using signals from fewer than four satellites |
November 9, 1999 |
| Method and apparatus for determining the location of a point on a rotating body, using location determination (LD) signals received from as few as one satellite, preferably non-geosynchronous. Where signals from two or more satellites are received, one may be geosynchronous. Pseudoranges |
| 5957995 |
Radio navigation emulating GPS system |
September 28, 1999 |
| The present invention provides a radio navigation emulating GPS device. In one embodiment, the radio navigation emulating GPS device receives an identifier associated with a conventional radio navaid. The present radio navigation emulating GPS device then retrieves latitude and longitude |
| 5945943 |
System for using differential GPS receivers with autopilot systems for category III precision ap |
August 31, 1999 |
| A precision approach capable dual differential global positioning system (DGPS) receiver avionics system. The system of the present invention includes a first and a second DGPS receiver. The first and second DGPS receivers are both adapted to interface with an autopilot in an aircraft. |
| 5907578 |
Weighted carrier phase multipath reduction |
May 25, 1999 |
| The effect of the multipath distortions on the carrier phase measurements is reduced by using the weighted correlation functions. The generators of both periodic and dynamic weighted functions are used. The apparatus and method employing generators of such weighted functions can comprise |
| 5850197 |
Attitude determination using fewer than three antennas |
December 15, 1998 |
| Method and apparatus for determining the attitude or angular orientation of a moving vehicle or other moving body, using either two spaced apart antennas or a single antenna attached to or connected with the vehicle. Where two antennas are used, the spatial locations of each antenna are |
| 5791294 |
Position and physiological data monitoring and control system for animal herding |
August 11, 1998 |
| An apparatus and method for monitoring and controlling the position of an animal. A mounted subsystem, affixed to an animal, includes a first computer control system having a first input/output device (first I/O), a position determining system (PDS), a first transceiver, sensors, and |
| 5731788 |
Global positioning and communications system and method for race and start line management |
March 24, 1998 |
| A system and method for positioning control and management of racing sailboat positions and velocities includes the strategic placement of global positioning receivers and transmitters at a buoy and committee boat marking the sail race start line, as well as radio and global positioning |
| 5694136 |
Antenna with R-card ground plane |
December 2, 1997 |
| An antenna structure has a radiating element and a ground plane. The ground plane has a central region relatively closely spaced apart from the radiating element and a peripheral region extending away from the central region. At least the peripheral region of the ground plane has a sheet |
| 5614913 |
Optimization of survey coordinate transformations |
March 25, 1997 |
| A system for selecting an optimal transformation T(G2;G1) between a first ellipsoid E1 (e.g., WGS 84) in a first global coordinate system G1, relative to which the survey measurements are made, and a second ellipsoid E2 in a second global coordinate system G2. A set of location coordinat |
| 5561432 |
Out of plane antenna vector system and method |
October 1, 1996 |
| An attitude determination system and method employs first and second baseline determinations comparing the relative phase of carrier signals received from GPS satellites. Attitude determinations include determination of roll, pitch and azimuth of ships, aircraft, vehicles and other d |
| 5523763 |
System and method for compact storage and transmission of position and residual information usab |
June 4, 1996 |
| A system and method for optimizing data transmission and storage of minimal sets of position, time, and residual information required for differential global positioning involving at least two GPS receiving stations, one of which may be stationary and at least one of which is mobile, wit |
| 5402450 |
Signal timing synchronizer |
March 28, 1995 |
| A method and apparatus are disclosed for characterizing multipath-induced distortions in the autocorrelation function of a correlation receiver in order to reduce effects of these multipath-induced distortions on the accuracy of detecting the time of arrival of a received signal. The |
| 5313069 |
Distance measuring system of an extendable strip having light reflecting and non-reflecting poly |
May 17, 1994 |
| Apparatus for determining the distance, accurate to within an error of no more than 1 mm, from a first position to a second position. The apparatus includes a distance marker that includes a first strip having a sequence of uniformly spaced light-reflecting (or light-transmitting) region |
| 5202694 |
P-code generation |
April 13, 1993 |
| Improved apparatus for generation of the P-code sequences used in global positioning by issuance and sensing of code sequences issued by a plurality of satellites. The improved apparatus generates the same P-code sequences with fewer components, or with different components, by removal |
| 5173715 |
Antenna with curved dipole elements |
December 22, 1992 |
| An antenna comprises a base plate forming a ground plane, a coaxial feed serving as a mast connected to the base plate and extending along an axis that is normal to the ground plane, and two orthogonal dipoles each formed of two elements. Each dipole element has a first end connected to |
| 5165109 |
Microwave communication antenna |
November 17, 1992 |
| A microwave communication antenna consists of a laminated structure having an r.f. radiating conductor affixed on the top side thereof and a feed coupling network within. The r.f. radiating conductor is capacitively coupled to the feed coupling network, a portion of which is sandwiched |
| 5148179 |
Differential position determination using satellites |
September 15, 1992 |
| A method for accurately determining the position of a roving signal receiver positioned on or above the Earth's surface, relative to the position of a reference receiver whose position is known with sufficient accuracy, using ranging information, transmitted at a pair of predetermine |
