초록 ▼

Processing GPS signals received at moving targets and at a fixed location near instrumentation associated with timing and recording an event allows the determination of instantaneous target position to be made without a requirement for additional active tracking. An example is the recording and disp

Processing GPS signals received at moving targets and at a fixed location near instrumentation associated with timing and recording an event allows the determination of instantaneous target position to be made without a requirement for additional active tracking. An example is the recording and display of a test event involving a missile intercepting a target. The missile, target, and an instrumentation site all receive GPS signals. The signals are time tagged and the data contained thereon verified by a source and forwarded from each platform to a ground station. The data is correlated with other test data to provide a real time record and display of the missile intercepting the target. Both Time Space Position Information (TSPI) and Miss Distance Indication (MDI) are derived to a very high degree of accuracy using double difference error correction techniques. Both absolute and relative position information can be derived.

대표청구항 ▼

Processing GPS signals received at moving targets and at a fixed location near instrumentation associated with timing and recording an event allows the determination of instantaneous target position to be made without a requirement for additional active tracking. An example is the recording and disp

Processing GPS signals received at moving targets and at a fixed location near instrumentation associated with timing and recording an event allows the determination of instantaneous target position to be made without a requirement for additional active tracking. An example is the recording and display of a test event involving a missile intercepting a target. The missile, target, and an instrumentation site all receive GPS signals. The signals are time tagged and the data contained thereon verified by a source and forwarded from each platform to a ground station. The data is correlated with other test data to provide a real time record and display of the missile intercepting the target. Both Time Space Position Information (TSPI) and Miss Distance Indication (MDI) are derived to a very high degree of accuracy using double difference error correction techniques. Both absolute and relative position information can be derived. uses. Further, a receiving device receives the positional information and message transmitted from other portable terminal apparatuses. Then, a map data acquiring device acquires the map data in a predetermined range including the location shown by the received positional information. A displaying device displays the map data together with a mark that indicates the position shown by the received positional information. made connectable to the GPS receiver, the system characterized by comprising a reception level detecting unit which measures a reception level of the built-in antenna and that of the external antenna and compares the measured reception levels with each other, and an antenna switching control unit which selects a reception antenna from measurement and comparison results of the reception levels obtained in the reception level detecting unit and carries out control of switching between the built-in antenna and the external antenna, and, of the built-in antenna or the external antenna, designating an antenna which provides a higher reception level as the reception antenna for each of the GPS satellites picked up. 10. The GPS reception system as claimed in claim 1 further comprising a reception level detecting unit which measures a reception level of the built-in antenna and that of the external antenna and compares the measured reception levels with each other, and the antenna switching unit selects the receiving antenna from the measurement and comparison results of the reception levels obtained in the reception level detecting unit. iate disaster lighting for a second predetermined length of time if the AC power is lost and if the DC power is lost or voltage of the DC power drops below the predetermined level. ort means, comprising: a RFID reader having a magnetic flux field; at least one RFID tag, said RFID tag being disposed on at least a respective one of said product containers; and at least one passive repeater member, said passive repeater member being disposed proximate said plurality of product containers, said passive repeater member including at least one substantially continuous passive loop, said passive loop being adapted and, positionable with respect to said RFID reader and said RFID tag to couple said RFID reader and said RFID tag, said passive repeater member being adapted and positionable with respect to said RFID reader and said RFID tag to redirect said magnetic flux field. 11. The passive repeater system of claim 10, wherein said passive repeater member is disposed within said plurality of product containers. 12. The passive repeater system of claim 10, wherein said passive repeater member is disposed between said plurality of product containers and said transport means. 13. The passive repeater system of claim 10, wherein said passive repeater member is embedded in said transport means. 14. The passive repeater system of claim 10, wherein said passive repeater member extends the range of said magnetic flux field. 15. The passive repeater system of claim 10, wherein said passive repeater member is disposed immediately adjacent to said plurality of product containers. 16. The passive repeater system of claim 10, wherein said passive loop defines a loop region area. 17. The passive repeater system of claim 16, wherein said loop region area is in the range of 1.0 sq. in. to 400 sq ft. 18. A passive repeater system for a product carrier having a floor portion and at least two side walls, said product carrier having an interior section, said product carrier including at least one item disposed in said product carrier interior section, comprising: a RFID reader having a magnetic flux field; at least one RFID tag, said RFID tag being disposed on said item; and at least a first passive repeater member, said first passive repeater member being disposed in said product carrier interior section, said first passive repeater member including at least a first substantially continuous passive loop, said first passive loop being adapted and positionable with respect to said RFID reader and said RFID tag to couple said RFID reader and said RFID tag, said first, passive repeater member being adapted and positionable with respect to said RFID reader and said RFID tag to redirect said magnetic flux field. 19. The passive repeater system of claim 18, wherein said passive repeater system includes second and third passive repeater members, said second passive repeater member including a second passive loop, said third passive repeater member including a third passive loop, said second and third passive loops being adapted and positionable with respect to said first passive loop, said RFID reader and said RFID tag to couple said RFID reader and said a RFID tag. 20. The passive repeater system of claim 19, wherein said second passive repeater member is disposed in said product carrier interior section proximate one of said product carrier walls and said third passive repeater member is disposed in said product carrier interior section proximate a different one of said product carrier walls. 21. The passive repeater system of claim 19, wherein said second passive repeater member is disposed in said product carrier interior section proximate one of said product carrier walls and said third passive repeater member is disposed in said product carrier interior section proximate said floor portion. 22. The passive repeater system of claim 19, wherein said passive repeater system includes a fourth passive loop being adapted and positioned with respect to said first, second and third passive loops and said RFID reader and RFID tag to couple said RFID reader and said RFID tag. 23. The passive repeater system of claim 22, wherein sa id fourth passive loop is disposed on a selected one of said product carrier walls. 24. The passive repeater system of claim 22, wherein said fourth passive loop is substantially embedded in a selected one of said product cater walls. 25. The passive repeater system of claim 19, wherein said second and third passive repeater members redirect said magnetic flux field. 26. The passive repeater system of claim 19, wherein said second and third passive repeater members extend the range of said magnetic flux field. 27. The passive repeater system of claim 18, wherein said first passive repeater member extends the range of said magnetic flux field. 28. The passive repeater system of claim 18, wherein said item comprises a product container. 29. The passive repeater system of claim 18, wherein said item comprises a product. 30. The passive repeater system of claim 18, wherein each of said first, second, third and fourth passive loops define a loop region area. 31. The passive repeater system of claim 30, wherein said loop region area is in the range of 1.0 sq. in. to 400 sq ft. 32. A passive repeater system, comprising: a RFID reader having a magnetic flux field; at least one RFID tag; and at least one passive repeater member having at least one substantially continuous passive loop, said passive loop being adapted and positionable with respect to said RFID reader and said RFID tag to couple said RFID reader and said RFID tag, said passive repeater member being adapted and positionable with respect to said RFID reader and said RFID tag to extend the range of said magnetic flux field. 33. A passive repeater system, comprising: at least one product container, said product container having at least a first article disposed therein; a RFID reader having a magnetic flux field; at least one RFID tag, said RFID tag being removably attached to said first article, said RFID tag being adapted to be removed from said first article and re-attached to at least a second article; and at least one passive repeater member, said passive repeater member being attached to said product container, said passive repeater member including a substantially continuous passive loop adapted and positionable with respect to said RFID reader and said RFID tag to couple said RFID reader and said RFID tag, said passive repeater member being adapted and positionable with respect to said RFID reader and said RFID tag to redirect said magnetic flux field. 34. The passive repeater system of claim 33, wherein said passive repeater member extends the range of said magnetic flux field. 35. The passive repeater system of claim 33, wherein said RFID tag is removably attached to said product container. 36. The passive repeater system of claim 33, wherein said passive repeater member is embedded in said product container. 37. The passive repeater system of claim 33, wherein said passive repeater member is disposed proximate said product container.