Boots – shoes – and leggings
Patent
1993-09-02
1995-06-06
Teska, Kevin J.
Boots, shoes, and leggings
364444, 364450, 364443, 342357, 342367, 342457, 342358, 342463, 455 332, 455 334, 455 561, G06G 778, G01S 502, H04B 7185
Patent
active
054228131
ABSTRACT:
The present invention relates to a no outage GPS/AM position finding system wherein a GPS system having a plurality of satellites transmits time and location data over radio frequency signals to enable a mobile GPS receiver station on the ground to determine its position, and a cellular telephone is carried with the mobile GPS receiver, traveling in range of a plurality of conventional ground based amplitude modulated (AM) transmitters for transmitting AM signals. Each mobile GPS receiver station includes phase detection means for simultaneously receiving a predetermined number of the AM signals, and measuring the changes in phase of each of the AM signals as the mobile GPS receiver travels, and deriving therefrom an AM position signal. A reference station for receiving the GPS and AM signals provides correction signals via a cellular telephone network which receives and transmits the correction signals to the mobile GPS receiver station. The last accurate GPS position signal is used for resolving any ambiguities in the AM radio position signal and to accommodate the lack of synchronization in the AM transmitters. The reference station measures the frequency and wavelength variations in the AM signals and conveys same to the mobile GPS receiver station by the cellular telephone. The AM position signal is activated upon detecting outages or blockages in the GPS signals.
REFERENCES:
patent: 3191176 (1962-09-01), Guier
patent: 3889264 (1975-06-01), Fletcher
patent: 4054880 (1977-10-01), Dalabakis et al.
patent: 4651156 (1987-03-01), Martinez
patent: 4651157 (1987-03-01), Gray et al.
patent: 4731613 (1988-03-01), Endo et al.
patent: 4743913 (1988-03-01), Takai
patent: 4750197 (1988-06-01), Denekamp et al.
patent: 4751512 (1988-06-01), Longaker
patent: 4754465 (1988-06-01), Trimble
patent: 4785463 (1988-11-01), Janc et al.
patent: 4791572 (1988-12-01), Green, III et al.
patent: 4809005 (1989-02-01), Counselman et al.
patent: 4884208 (1989-11-01), Marinelli et al.
patent: 4891650 (1990-01-01), Sheffer
patent: 4891761 (1990-01-01), Gray et al.
patent: 4899285 (1990-02-01), Nakayama et al.
patent: 4903212 (1990-02-01), Yokouchi et al.
patent: 4912756 (1990-03-01), Hop
patent: 4953198 (1990-08-01), Daly et al.
patent: 5003317 (1991-03-01), Gray et al.
patent: 5014206 (1991-05-01), Schribner et al.
patent: 5017926 (1991-05-01), Ames et al.
patent: 5036329 (1991-07-01), Ando
patent: 5075693 (1991-12-01), McMillan et al.
patent: 5087919 (1992-02-01), Odagawa et al.
patent: 5119504 (1992-06-01), Durborow, III
patent: 5144318 (1992-09-01), Kishi
patent: 5146231 (1992-09-01), Ghaem et al.
patent: 5148179 (1992-09-01), Allison
patent: 5148452 (1992-09-01), Kennedy et al.
patent: 5155490 (1992-10-01), Spradley, Jr. et al.
patent: 5155491 (1992-10-01), Ando
patent: 5173710 (1992-12-01), Kelley et al.
patent: 5177490 (1993-01-01), Ando et al.
patent: 5179519 (1993-01-01), Adachi et al.
patent: 5185610 (1993-02-01), Ward et al.
patent: 5189430 (1993-02-01), Yano et al.
patent: 5194871 (1993-03-01), Counselman, III
patent: 5202829 (1993-04-01), Geir
patent: 5208756 (1993-05-01), Song
patent: 5214789 (1993-05-01), George
patent: 5218618 (1993-06-01), Sagey
patent: 5220509 (1993-06-01), Takemura et al.
patent: 5222245 (1993-06-01), Ando et al.
patent: 5223844 (1993-06-01), Mansell et al.
patent: 5225842 (1993-07-01), Brown et al.
patent: 5225843 (1993-07-01), Thompson
patent: 5225843 (1993-07-01), Thompson
patent: 5235633 (1993-08-01), Dennison et al.
patent: 5248981 (1993-09-01), Yoshihara et al.
patent: 5280295 (1994-01-01), Kelly et al.
patent: 5323164 (1994-06-01), Endo
patent: 5343209 (1994-08-01), Sennott et al.
Terrapin Corporation Paper (13 pages) Jan. 1993.
Engelbrecht Lloyd
Schuchman Leonard
Weinberg Aaron
Louis-Jacques Jacques H.
Stanford Telecommunications, Inc.
Teska Kevin J.
Zegeer Jim
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