Patent US3868324A successfully refreshed from Google Patents.
Patent EP0149120A2 successfully refreshed from Google Patents.
Patent US5382957A successfully refreshed from Google Patents.
US5382957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System and method
Assignee: United States Department of the Navy
•
Filing: 1989-12-19
•
Granted: 1995-01-17
•
Expires: 2009-12-19
Abstract
Abstract An improved system and method for detecting and positively identifying withnhanced IFF techniques an object or target from an interrogator platform where the area outwardly of and about the platform is suitably surveyed for detecting an object and where the platform is on the earth's surface, in the air or space so long as the platform and detected object to be identified are both within the envelope defined by the Global Position System (GPS) or the like. The system for carrying out the method can be generally made up of a GPS receiver, a programmed central processor unit and combined transceiver/antenna means. The GPS receiver of any platform after detecting an object advantageously functions to obtain the platform geoposition. Then by suitable means or by the cooperation of the programmed processor and antenna means obtain the bearing of the detected object. The detected object is then interrogated with an encrypted IFF signal as to the estimated position of the detected object. The signal also includes a region of uncertainty about the estimated position to assure positive object identification. Although the improved system has extensive military applications, it may readily be used for peaceful purposes. Because signal directivity is not required, an antenna of simple omnidirectional design may be used for any platform and object as well as any set of different frequencies for interrogating and receiving a response to the interrogation.
Inventors
- 👤 Richard J. Blume
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:44
CPC Classifications
G; G01; G01S; G01S5/00; G01S5/0009; G01S19/00; G01S19/01; G01S19/13; G01S19/14; G01S19/18
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
191 words
A system for identifying a detectable object by use of the plurality of satellites of the global positioning system GPS, said system comprising: platform means having survey means for surveying outwardly of and about the platform means and in any direction relative thereto for detecting an object to be identified, the platform means also having GPS receiver means, the GPS receiver means for receiving signals from a plurality of three satellites for determining the geoposition of the platform means in terms of latitude and longitude, all in real time; the platform means and a detected object to be identified being encompassed by the satellites of the GPS, and the platform means upon the survey means detecting an object including first means for determining the estimated position of the detected object and a predetermined region of uncertainty thereabout, the platform means having second means for transmitting an interrogation signal incorporating the estimated position of the detected object and the region of uncertainty thereabout to the detected object so that the detected object after being interrogated by the interrogation signal can respond with a signal for clearly identifying same to the platform means.
Claim 2
Independent Claim
191 words
A system for identifying a detectable object by use of the plurality of satellites of the global positioning system GPS, said system comprising: platform means having survey means for surveying outwardly of and about the platform means and in any direction relative thereto for detecting an object to be identified, the platform means also having GPS receiver means, the GPS receiver means for receiving signals from a plurality of three satellites for determining the geoposition of the platform means in terms of latitude and longitude, all in real time; the platform means and a detected object to be identified being encompassed by the satellites of the GPS, and the platform means upon the survey means detecting an object including first means for determining the estimated position of the detected object and a predetermined region of uncertainty thereabout, the platform means having second means for transmitting an interrogation signal incorporating the estimated position of the detected object and the region of uncertainty thereabout to the detected object so that the detected object after being interrogated by the interrogation signal can respond with a signal for clearly identifying same to the platform means.
Claim 3
Dependent Claim
25 words
A system as set forth in claim 1 wherein the survey means can be effected by the eyesight of the user of the platform means.
Claim 4
Dependent Claim
93 words
A system as set forth in claim 1 wherein the survey means together with the first and second means is all effected by both a programmed central processor PCP means and a combined antenna and transceiver CA/T means, wherein the GPS receiver means, the PCP means and the CA/T means are interconnected together, and wherein the PCP means and CA/T means cooperate for transmitting a surveillance radar signal of suitable configuration for scanning the area outwardly of and about the platform means and in any direction for detecting an object to be identified.
Claim 5
Dependent Claim
14 words
A system as set forth in claim 3 wherein the antenna means is omnidirectional.
Claim 6
Dependent Claim
15 words
A system as set forth in claim 1 wherein the platform means is surface means.
Claim 7
Dependent Claim
15 words
A system as set forth in claim 1 wherein the platform means is an aircraft.
Claim 8
Dependent Claim
15 words
A system as set forth in claim 1 wherein the platform means is a spacecraft.
Claim 9
Dependent Claim
17 words
A system as set forth in claim 1 wherein the region of uncertainty is of circular-shaped configuration.
Claim 10
Dependent Claim
27 words
A system as set forth in claim 1 wherein the region of uncertainty is of wedge-shaped configuration and diverging as it extends outwardly from the platform means.
Claim 11
Dependent Claim
34 words
A system as set forth in claim 1 wherein the geoposition of the platform means is determined by a plurality of four satellites in terms of latitude, longitude and altitude, all in real time.
Claim 12
Dependent Claim
41 words
A system as set forth in claim 1 wherein the interrogation signal of the platform means and response signal of the detected object to be identified are at different frequencies after the detected object is interrogated by the interrogation signal thereof.
Claim 13
Dependent Claim
14 words
A system as set forth in claim 1 wherein the interrogation signal is encrypted.
Claim 14
Independent Claim
180 words
A method for identifying a detectable object from a platform where both the platform and the object to be identified are encompassed by the plurality of satellites of the Global Position System GPS of the like, the method comprising the steps of: surveying the area outwardly of and about the platform for detecting an object to be identified, determining the geoposition of the platform in terms of latitude and longitude, all in real time, by the use of signals from a series of three satellites of the GPS once an object has been detected as the result of a survey in relation to the platform, next determining the bearing of the detected object, then determining the estimated position of the detected object including a region of uncertainty about the detected object in relation to its estimated position after the bearing of the detected object is determined, and transmitting a signal from the platform for interrogating the detected object to be identified such that the signal incorporates both the estimated position of the detected object and the region of uncertainty thereabout.
Claim 15
Independent Claim
180 words
A method for identifying a detectable object from a platform where both the platform and the object to be identified are encompassed by the plurality of satellites of the Global Position System GPS of the like, the method comprising the steps of: surveying the area outwardly of and about the platform for detecting an object to be identified, determining the geoposition of the platform in terms of latitude and longitude, all in real time, by the use of signals from a series of three satellites of the GPS once an object has been detected as the result of a survey in relation to the platform, next determining the bearing of the detected object, then determining the estimated position of the detected object including a region of uncertainty about the detected object in relation to its estimated position after the bearing of the detected object is determined, and transmitting a signal from the platform for interrogating the detected object to be identified such that the signal incorporates both the estimated position of the detected object and the region of uncertainty thereabout.
Claim 16
Dependent Claim
30 words
A method as set forth in claim 13 wherein the step of surveying is effected by the eyesight of the user of the platform with or without a visual aid.
Claim 17
Dependent Claim
87 words
A method as set forth in claim 13 wherein the step of surveying is effected by the platform having programmed control processor PCP means, and combined antenna and transceiver CA/T means such that the PCP means and CA/T means are interconnected and cooperate in transmitting a radar surveillance signal of suitable configuration for scanning the area outwardly of and about the platform at a desired range for detecting an object to be identified where the object is located in the scanned area and within the desired range.
Claim 18
Dependent Claim
19 words
A method as set forth in claim 13 wherein at least the object-to-be-identified is moving relative to the platform.
Claim 19
Dependent Claim
15 words
A method as set forth in claim 13 wherein the platform is a surface vehicle.
Claim 20
Dependent Claim
14 words
A method as set forth in claim 13 wherein the platform is an aircraft.
Claim 21
Dependent Claim
14 words
A method as set forth in claim 13 wherein the platform is a spacecraft.
Claim 22
Dependent Claim
27 words
A method as set forth in claim 13 wherein the step of determining the geoposition of the platform is effected by the platform having a GPS receiver.
Claim 23
Dependent Claim
47 words
A method as set forth in claim 13 wherein the step of transmitting a signal is effected at one frequency, and wherein the platform in response to its transmitted signal receiving a signal at a different frequency from the detected object after the detected object is interrogated.
References Cited (Backward Citations)
US3161871A
Cited
US3956797A
Cited
US3772688A
Cited
US4077005A
Cited
US3922673A
Cited
US4599620A
Cited
US4860352A
Cited
US4741245A
Cited
US4799062A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-01-16 | 1998-07-18 | 1999-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-16 | 2002-07-18 | 2003-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-16 | 2006-07-18 | 2007-01-17 | $7700.00 | Window Closed / Lapsed |