Award Data

GPS TRANSLATORS ARE CURRENTLY USED ON A NUMBER OF PROGRAMS FOR INSTRUMENTING MISSILE TESTS. TRANSLATORS ALLOW HIGH-DYNAMIC VEHICLES TO BE TRACKED THROUGH ACCELERATIONS UP TO 50 GS WHILE MINIMIZING THE SIZE, WEIGHT, AND COST OF THE EXPENDABLE FLIGHT HARDWARE. THE ANALOG NATURE OF EXISTING TRANSLATORS PREVENTS ENCRYPTION OF THE DOWNLINK SIGNAL AND REQUIRES HIGHLY COMPLEX AND COSTLY GROUND STATIONS. ...

GPS IS PLANNED TO BE USED BY THE U.S. ARMY IN A VARIETY OF TACTICAL SCENARIOS. FIRE CONTROL APPLICATIONS ARE CURRENTLY BEING INVESTIGATED WHERE GPS WOULD BE USED TO TRACK REGISTRATION ROUNDS AND LOCATE RADIOSONDES. SINCE GPS IS A RADIONAVIGATION SYSTEM, ITS EFFECTIVENESS IN A TACTICAL ENVIRONMENT IS LIMITED BY ITS SUSCEPTIBILITY TO ELECTRONIC COUNTERMEASURES (ECM). IT IS PARTICULARLY DIFFICULT TO ...

CURRENTLY, THE LANDING REQUIREMENTS OF CLOSE-RANGE, SHORT-RANGE, AND MEDIUM-RANGE UAVS PLACE OPERATIONAL LIMITS ON THEIR USE. A LOW COST, PORTABLE, PRECISION APPROACH AND LANDING SYSTEM IS DESCRIBED IN THIS PROPOSAL WHICH USES THE GLOBAL POSITIONING SYSTEM (GPS) . TO BE VIABLE AS A PRECISION APPROACH SYSTEM, GPS MUST BE CAPABLE OF PROVIDING AN ACCURACY OF BETTER THAN 9.1 METERS IN AZIMUTH AND 3 ME ...

THE AIRCRAFT LANDING SYSTEM USES THE GLOBAL POSITIONING SYSTEM (GPS) IN CONJUNCTION WITH SPECIAL PURPOSE GROUND EQUIPMENT TO PROVIDE A HIGHLY ACCURATE, FULLY AUTONOMOUS, PORTABLE PRECISION APPROACH AND LANDING SYSTEM. THE GROUND STATION INCLUDES A HIGHLY ACCURATE GPS REFERENCE RECEIVER THAT CAN BE USED TO SUPPORT OTHER APPLICATIONS SUCH AS ATMOSPHERIC DATA COLLECTION OR SURVEYING. THE AIRCRAFT REC ...

Accurate estimate of the multipath channel parameters allow the associated errors to be cancelled which greatly improves GPS system navigation performance. A multi-parameter maximum likelihood estimation technique has been shown through simulations to be very effective in antimultipath processing. This approach is based on implementing a multipath estimating delay locked loop (MEDLL). The key to t ...

To achieve real-time ambiguity resolution (AR) in a high-dynamic environment, an algorithm is needed that is robut to cycle-slips and requires the minimum possible number of consecutive measurements before correctly resolving the ambiguities. The problem with existing AR algorithms is that they require many consecutive measurements over a long period of time and/or a significantly changing satelli ...

The ability to fuse data from sensors on both aircraft and weapon systems can significantly improve the accuracy of weapon delivery. NAVSYS has designed an innovative tracking system that optimally combines data from both the aircraft and missile sensors. This approach minimizes the required missile electronics while providing a highly accurate integrated GPS/INS solution for enhanced weapon deliv ...

NAVSYS has developed a low cost sensor, the TIDGET (TM), which is currently being used for tracking weather balloons, but also has application for small rockets. The TIDGET sensor operates by buffering brief snapshots of GPS data for transmission to a ground processing system through an on-board telemetry link. This simplified the functionality in the rocket payload. Conventional GPS receivers ...

INMARSAT HAS DESIGNED A GPS (L1) TRANSPONDER THAT WILL BE INCLUDED IN THEIR THIRD GENERATION SATELLITES. THIS TRANSPONDER WILL

Translated GPS tracking systems are frequently used to track missiles, aircraft, and other aerospace vehicle for applications requiring real-time position and velocity. The GPS/TPS tracking system provides intermediate data that is recorded during tracking and available for post-mission trajectory analysis. Greater post-mission trajectory accuracy can be achieved by using improved error models and ...