US6744403B2 — GPS based tracking system

Claim 1

Independent Claim 72 words

An apparatus for tracking objects, comprising: GPS receivers mounted in moving objects; sensors mounted in said moving objects; a set of one or more base stations; transmitters/receivers at said base stations; transmitters/receivers at said moving objects in communication with said transmitters/receivers at said base station; a GPS reference station in communication with one of said base stations for providing differential GPS information; and a production center in communication with said base stations.

Claim 2

Independent Claim 72 words

An apparatus for tracking objects, comprising: GPS receivers mounted in moving objects; sensors mounted in said moving objects; a set of one or more base stations; transmitters/receivers at said base stations; transmitters/receivers at said moving objects in communication with said transmitters/receivers at said base station; a GPS reference station in communication with one of said base stations for providing differential GPS information; and a production center in communication with said base stations.

Claim 3

Dependent Claim 14 words

An apparatus according to claim 1 , wherein: said moving objects are race cars.

Claim 4

Independent Claim 67 words

A method for tracking objet is, comprising the steps of: using GPS to track a set of objects; sensing data about said set of objects; communicating said data and GPS positions from said objects to base stations using wireless technology; determining a set of statistics about said set of objects; highlighting images of said set of objects in a video; and adding said statistics to said video.

Claim 5

Independent Claim 67 words

A method for tracking objet is, comprising the steps of: using GPS to track a set of objects; sensing data about said set of objects; communicating said data and GPS positions from said objects to base stations using wireless technology; determining a set of statistics about said set of objects; highlighting images of said set of objects in a video; and adding said statistics to said video.

Claim 6

Dependent Claim 92 words

One or more processor readable storage devices for storing processor readable code, said processor readable code for programming one or more processors to perform a method for tracking objects, the method comprising the steps of: using GPS to track a set of objects; sensing data about said set of objects; communicating said data and GPS positions from said objects to base stations using wireless technology; determining a set of statistics about said set of objects; highlighting images of said set of objects in a video; and adding said statistics to said video.

Claim 7

Dependent Claim 92 words

One or more processor readable storage devices for storing processor readable code, said processor readable code for programming one or more processors to perform a method for tracking objects, the method comprising the steps of: using GPS to track a set of objects; sensing data about said set of objects; communicating said data and GPS positions from said objects to base stations using wireless technology; determining a set of statistics about said set of objects; highlighting images of said set of objects in a video; and adding said statistics to said video.

Claim 8

Independent Claim 89 words

A method for tracking at least one object, comprising the steps of: receiving data about an object, wherein at least a subset of said data is derived at least in part using GPS; receiving video including said object; identifying a difference between a GPS time associated with said GPS and a video time associated with said video; and determining appropriate information for an image in said video, based at least in part on said difference, wherein said appropriate information is derived from at least a portion of said data.

Claim 9

Independent Claim 89 words

A method for tracking at least one object, comprising the steps of: receiving data about an object, wherein at least a subset of said data is derived at least in part using GPS; receiving video including said object; identifying a difference between a GPS time associated with said GPS and a video time associated with said video; and determining appropriate information for an image in said video, based at least in part on said difference, wherein said appropriate information is derived from at least a portion of said data.

Claim 10

Dependent Claim 51 words

A method according to claim 5 , wherein said step of identifying includes the steps of: determining a time associated with said GPS time at a position in a portion of said video; and determining a time associated with said video time at said position in said portion of said video.

Claim 11

Dependent Claim 36 words

A method according to claim 6 , wherein said step of identifying further includes the step of: sending a message indicating said time associated with said GPS time and said time associated with said video time.

Claim 12

Dependent Claim 68 words

A method according to claim 6 , wherein said step of determining said time associated with said GPS time includes the steps of: recording a series of times associated with said GPS time; and interpolating between a plurality of said times in said series of times to obtain a time corresponding to said time associated with said video time at said position in said portion of said video.

Claim 13

Dependent Claim 33 words

A method according to claim 5 , wherein said data corresponds to a plurality of objects, said video includes said plurality of objects, and said appropriate information relates to said plurality of objects.

Claim 14

Dependent Claim 49 words

A method according to claim 5 , wherein said method further includes the steps of: generating at least one enhancement, wherein said at least one enhancement is derived at least in part from said appropriate information; and enhancing an image in said video using said at least one enhancement.

Claim 15

Dependent Claim 49 words

A method according to claim 10 , wherein said at least one enhancement is included in a group of enhancements consisting of: speed, acceleration, lap count, lap fraction, race position, time behind leader, virtual loop information, prediction of fuel exhaustion, missing sensor data, a highlight, and a pre-rendered image.

Claim 16

Dependent Claim 15 words

A method according to claim 5 , wherein said object is participating in a race.

Claim 17

Dependent Claim 42 words

A method according to claim 5 , wherein said method further includes the step of: providing error correction information corresponding to an error in satellite timing, wherein said data includes position data derived at least in part using said error correction information.

Claim 18

Dependent Claim 63 words

A method according to claim 5 , wherein said method further includes the steps of: tracking said object using GPS, wherein said data includes position data derived at least in part from GPS signals received during said step of tracking; collecting sensor data about said object, wherein said sensor data is included in said data; and forwarding said data to a production center.

Claim 19

Dependent Claim 46 words

A method according to claim 14 , wherein said step of forwarding said data to said production center includes the steps of: forwarding said data to at least one base station; and forwarding said data from said at least one base station to said production center.

Claim 20

Dependent Claim 121 words

One or more processor readable storage devices having processor readable code embodied on said processor readable storage devices, said processor readable code for programming one or more processors to perform a method for tracking at least one object, said method comprising the steps of: receiving data about an object, wherein at least a subset of said data is derived at least in part using GPS; receiving video including said object; identifying a difference between a GPS time associated with said GPS and a video time associated with said video; and determining appropriate information for an image in said video, based at least in part on said difference, wherein said appropriate information is derived from at least a portion of said data.

Claim 21

Dependent Claim 121 words

One or more processor readable storage devices having processor readable code embodied on said processor readable storage devices, said processor readable code for programming one or more processors to perform a method for tracking at least one object, said method comprising the steps of: receiving data about an object, wherein at least a subset of said data is derived at least in part using GPS; receiving video including said object; identifying a difference between a GPS time associated with said GPS and a video time associated with said video; and determining appropriate information for an image in said video, based at least in part on said difference, wherein said appropriate information is derived from at least a portion of said data.

Claim 22

Dependent Claim 56 words

One or more processor readable storage devices according to claim 16 , wherein said step of identifying includes the steps of: determining a time associated with said GPS time at a position in a portion of said video; and determining a time associated with said video time at said position in said portion of said video.

Claim 23

Dependent Claim 73 words

One or more processor readable storage devices according to claim 17 , wherein said step of determining said time associated with said GPS time includes the steps of: recording a series of times associated with said GPS time; and interpolating between a plurality of said times in said series of times to obtain a time corresponding to said time associated with said video time at said position in said portion of said video.

Claim 24

Dependent Claim 54 words

One or more processor readable storage devices according to claim 16 , wherein said method further includes the steps of: generating at least one enhancement wherein said at least one enhancement is derived at least in part from said appropriate information; and enhancing an image in said video using said at least one enhancement.

Claim 25

Dependent Claim 54 words

One or more processor readable storage devices according to claim 19 , wherein said at least one enhancement is included in a group of enhancements consisting of: speed, acceleration, lap count, lap fraction, race position, time behind leader, virtual loop information, prediction of fuel exhaustion, missing sensor data, a highlight, and a pre-rendered image.

Claim 26

Independent Claim 128 words

An apparatus, comprising: a communication interface; one or more storage devices; and one or more processors in communication with said one or more storage devices and said communication interface, said one or more processors programmed to perform a method for tracking at least one object, said method comprising the steps of: receiving data about an object, wherein at least a subset of said data is derived at least in part using GPS; receiving video including said object; identifying a difference between a GPS time associated with said GPS and a video time associated with said video; and determining appropriate information for an image in said video, based at least in part on said difference, wherein said appropriate information is derived from at least a portion of said data.

Claim 27

Independent Claim 128 words

An apparatus, comprising: a communication interface; one or more storage devices; and one or more processors in communication with said one or more storage devices and said communication interface, said one or more processors programmed to perform a method for tracking at least one object, said method comprising the steps of: receiving data about an object, wherein at least a subset of said data is derived at least in part using GPS; receiving video including said object; identifying a difference between a GPS time associated with said GPS and a video time associated with said video; and determining appropriate information for an image in said video, based at least in part on said difference, wherein said appropriate information is derived from at least a portion of said data.

Claim 28

Dependent Claim 51 words

An apparatus according to claim 21 , wherein said step of identifying includes the steps of: determining a time associated with said GPS time at a position in a portion of said video; and determining a time associated with said video time at said position in said portion of said video.

Claim 29

Dependent Claim 68 words

An apparatus according to claim 22 , wherein said step of determining said time associated with said GPS time includes the steps of: recording a series of times associated with said GPS time; and interpolating between a plurality of said times in said series of times to obtain a time corresponding to said time associated with said video time at said position in said portion of said video.

Claim 30

Dependent Claim 86 words

An apparatus according to claim 21 , wherein said method further includes the steps of: generating at least one enhancement, wherein said at least one enhancement is derived at least in part from said appropriate information and is included in a group of enhancements consisting of: speed, acceleration, lap count, lap fraction, race position, time behind leader, virtual loop information, prediction of fuel exhaustion, missing sensor data, a highlight, and a pre-rendered image; and enhancing an image in said video using said at least one enhancement.

Claim 31

Dependent Claim 62 words

An apparatus according to claim 21 , wherein said apparatus further includes: at least one receiver adapted to receive GPS signals to track said object, wherein said data includes position data derived at least in part from said GPS signals; and at least one sensor adapted to collect sensor data about said object, wherein said sensor data is included in said data.

Claim 32

Dependent Claim 43 words

An apparatus according to claim 25 , wherein said apparatus further includes: a base station adapted to receive said position data and said sensor data; and a production center adapted to receive said position data and said sensor data from said base station.

Claim 33

Independent Claim 92 words

A method for tracking information about at least one object, comprising the steps of: receiving position data about an object, said position data is based on a first GPS sensor; receiving sensor data about said object, said sensor data is based on a sensor that is not a GPS sensor; receiving video including said object; determining at least one statistic related to said object, wherein said at least one statistic is not included in said position data or said sensor data; and enhancing said video to display said at least one statistic.

Claim 34

Independent Claim 92 words

A method for tracking information about at least one object, comprising the steps of: receiving position data about an object, said position data is based on a first GPS sensor; receiving sensor data about said object, said sensor data is based on a sensor that is not a GPS sensor; receiving video including said object; determining at least one statistic related to said object, wherein said at least one statistic is not included in said position data or said sensor data; and enhancing said video to display said at least one statistic.

Claim 35

Dependent Claim 43 words

A method according to claim 27 , wherein said at least one statistic is one of a group of statistics including: speed, acceleration, lap count, lap fraction, race position, time behind leader, virtual loop information, prediction of fuel exhaustion, and missing sensor data.

Claim 36

Dependent Claim 31 words

A method according to claim 27 , wherein said step of determining at least one statistic includes the step of: determining a section of a track in which an object resides.

Claim 37

Dependent Claim 32 words

A method according to claim 29 , wherein said step of determining at least one statistic includes the step of: determining a lap count based at least in part on said section.

Claim 38

Dependent Claim 64 words

A method according to claim 29 , wherein said section is associated with a first lap fraction and a second section of said track is associated with a second lap fraction and said step of determining at least one statistic includes the step of: determining a new lap fraction based at least in part on said first lap fraction and said second lap faction.

Claim 39

Dependent Claim 20 words

A method according to claim 29 , wherein said section is derived at least in part based on loop data.

Claim 40

Dependent Claim 42 words

A method according to claim 27 , wherein said step of determining at least one statistic includes the step of: determining a prediction of fuel exhaustion at least in part on a proximity of said object to at least one other object.

Claim 41

Dependent Claim 47 words

A method according to claim 27 , wherein said step of determining at least one statistic includes the steps of: determining whether said object crossed a boundary; and determining virtual loop information based at least in part on said determination of whether said object crossed said boundary.

Claim 42

Dependent Claim 70 words

A method according to claim 27 , wherein said position data corresponds to a plurality of objects, said sensor data corresponds to said plurality of objects, said video includes said plurality of objects, and said step of determining includes the step of: determining at least one statistics for each object, wherein said at least one statistic for each object is not included in said position data or said sensor data.

Claim 43

Dependent Claim 41 words

A method according to claim 27 , wherein said method further includes the step of: generating at least one non-statistical enhancement for said image in said video; and enhancing said image in said video with said at least one non-statistical enhancement.

Claim 44

Dependent Claim 30 words

A method according to claim 36 , wherein said at least one non-statistical enhancement is included in a group of non-statistical enhancements consisting of: a highlight and a pre-rendered image.

Claim 45

Dependent Claim 17 words

A method according to claim 27 , wherein said object is an automobile participating in a race.

Claim 46

Dependent Claim 41 words

A method according to claim 27 , wherein said method further includes the step of: providing error correction information corresponding to an error in satellite timing, wherein said position data is derived at least in part using said error correction information.

Claim 47

Dependent Claim 61 words

A method according to claim 27 , wherein said method further includes the steps of: tracking said object using GPS signals, wherein said position data is derived at least in part from said GPS signals received during said step of tracking; collecting said sensor data about said object; and forwarding said position data and said sensor data to a production center.

Claim 48

Dependent Claim 41 words

A method according to claim 27 , wherein said method further includes the step of: detecting an event related to said object, based at least in part on said position data; and positioning a device in response to detecting said event.

Claim 49

Dependent Claim 19 words

A method according to claim 41 , wherein said event is a crash and said device is a camera.

Claim 50

Dependent Claim 114 words

One or more processor readable storage devices having processor readable code embodied on said processor readable storage devices, said processor readable code for programming one or more processors to perform a method comprising the steps of: receiving position data about an object, said position data is based an a first GPS sensor; receiving sensor data about said object, said sensor data is based on a sensor that is not a GPS sensor; receiving video including said object; determining at least one statistic related to said object, wherein said at least one statistic is not included in said position data or said sensor data; and enhancing said video to display said at least one statistic.

Claim 51

Dependent Claim 114 words

One or more processor readable storage devices having processor readable code embodied on said processor readable storage devices, said processor readable code for programming one or more processors to perform a method comprising the steps of: receiving position data about an object, said position data is based an a first GPS sensor; receiving sensor data about said object, said sensor data is based on a sensor that is not a GPS sensor; receiving video including said object; determining at least one statistic related to said object, wherein said at least one statistic is not included in said position data or said sensor data; and enhancing said video to display said at least one statistic.

Claim 52

Dependent Claim 49 words

One or more processor readable storage devices according to claim 43 , wherein said at least one statistic is included in a group of statistics consisting of: speed, acceleration, lap count, lap fraction, race position, time behind leader, virtual loop information, prediction of fuel exhaustion, and missing sensor data.

Claim 53

Dependent Claim 46 words

One or more processor readable storage devices according to claim 43 , wherein said method further includes the step of: generating at least one non-statistical enhancement for said image in said video; and enhancing said image in said video with said at least one non-statistical enhancement.

Claim 54

Independent Claim 119 words

An apparatus, comprising: a communication interface; one or more storage devices; and one or more processors in communication with said one or more storage devices and said communication interface, said one or more processors perform a method comprising the steps of: receiving position data about an object, said position data is based on a first GPS sensor, receiving sensor data about said object, said sensor data is based on a sensor that is not a GPS sensor, receiving video including said object, determining at least one statistic related to said object, wherein said at least one statistic is not included in said position data or said sensor data, and enhancing said video to display said at least one statistic.

Claim 55

Independent Claim 119 words

An apparatus, comprising: a communication interface; one or more storage devices; and one or more processors in communication with said one or more storage devices and said communication interface, said one or more processors perform a method comprising the steps of: receiving position data about an object, said position data is based on a first GPS sensor, receiving sensor data about said object, said sensor data is based on a sensor that is not a GPS sensor, receiving video including said object, determining at least one statistic related to said object, wherein said at least one statistic is not included in said position data or said sensor data, and enhancing said video to display said at least one statistic.

Claim 56

Dependent Claim 44 words

An apparatus according to claim 46 , wherein said at least one statistic is included in a group of statistics consisting of: speed, acceleration, lap count, lap fraction, race position, time behind leader, virtual loop information, prediction of fuel exhaustion, and missing sensor data.

Claim 57

Dependent Claim 41 words

An apparatus according to claim 46 , wherein said method further includes the step of: generating at least one non-statistical enhancement for said image in said video; and enhancing said image in said video with said at least one non-statistical enhancement.

Claim 58

Dependent Claim 43 words

An apparatus according to claim 46 , wherein said apparatus further includes: a base station adapted to receive said position data and said sensor data; and a production center adapted to receive said position data and said sensor data from said base station.

Claim 59

Dependent Claim 21 words

A method according to claim 27 , wherein: said at least one statistic is based on at least said position data.

Claim 60

Dependent Claim 25 words

A method according to claim 27 , wherein: said at least one statistic is based on at least said position data and said sensor data.

Claim 61

Dependent Claim 23 words

A method according to claim 27 , wherein: said step of determining at least one statistic includes determining velocity of said one object.

Claim 62

Dependent Claim 23 words

A method according to claim 27 , wherein: said step of determining at least one statistic includes determining acceleration of said one object.

Claim 63

Dependent Claim 26 words

A method according to claim 27 , wherein: said step of determining at least one statistic includes determining lap count of an automobile in a race.

Claim 64

Dependent Claim 29 words

A method according to claim 27 , wherein: said step of determining at least one statistic includes determining lap count and lap fraction of an automobile in a race.

Claim 65

Dependent Claim 27 words

A method according to claim 27 , wherein: said step of determining at least one statistic includes determining a race position of an automobile in a race.

Claim 66

Dependent Claim 29 words

A method according to claim 27 , wherein: said step of determining at least one statistic includes determining how far an automobile is behind a leader in a race.

Claim 67

Dependent Claim 26 words

A method according to claim 27 , wherein: said step of determining at least one statistic includes determining when an automobile will run out of fuel.

Claim 68

Dependent Claim 26 words

One or more processor readable storage devices according to claim 43 , wherein: said at least one statistic is based on at least said position data.

Claim 69

Dependent Claim 30 words

One or more processor readable storage devices according to claim 43 , wherein: said at least one statistic is based on at least said position data and said sensor data.

Claim 70

Dependent Claim 21 words

An apparatus according to claim 46 , wherein: said at least one statistic is based on at least said position data.

Claim 71

Dependent Claim 25 words

An apparatus according to claim 46 , wherein: said at least one statistic is based on at least said position data and said sensor data.

Claim 72

Dependent Claim 20 words

An apparatus according to claim 46 , wherein: said determining at least one statistic includes determining velocity of said object.

Claim 73

Dependent Claim 20 words

An apparatus according to claim 46 , wherein: said determining at least one statistic includes determining acceleration of said object.

Claim 74

Dependent Claim 24 words

An apparatus according to claim 46 , wherein: said determining at least one statistic includes determining lap count of an automobile in a race.

Claim 75

Dependent Claim 27 words

An apparatus according to claim 46 , wherein: said determining at least one statistic includes determining lap count and lap fraction of an automobile in a race.

Claim 76

Dependent Claim 23 words

An apparatus according to claim 46 , wherein: said determining at least one statistic includes determining position of an automobile in a race.

Claim 77

Dependent Claim 27 words

An apparatus according to claim 46 , wherein: said determining at least one statistic includes determining how far an automobile is behind a leader in a race.

Claim 78

Dependent Claim 26 words

An apparatus according to claim 46 , wherein: said determining said determining at least one statistic includes determining when an automobile will run out of fuel.

Claim 79

Independent Claim 89 words

A method for tracking a moving object, comprising the steps of: acquiring GPS data for said moving object; acquiring error correction information for said GPS data; determining a location of said moving object based on said GPS data and said error correction information; receiving video of said moving object; determining a position of an image of said moving object in said video using said determined location of said moving object; and editing said video based on said determined position of said image of said moving object in said video.

Claim 80

Independent Claim 89 words

A method for tracking a moving object, comprising the steps of: acquiring GPS data for said moving object; acquiring error correction information for said GPS data; determining a location of said moving object based on said GPS data and said error correction information; receiving video of said moving object; determining a position of an image of said moving object in said video using said determined location of said moving object; and editing said video based on said determined position of said image of said moving object in said video.

Claim 81

Dependent Claim 37 words

A method according to claim 70 , wherein: said steps of acquiring GPS data, determining a location, receiving video, determining a position and editing said video are performed during an event; and said video depicts said event.

Claim 82

Dependent Claim 45 words

A method according to claim 70 , wherein: said steps of acquiring UPS data, determining a location, receiving video, determining a position and editing said video are performed in real time during a sporting event; and said video is live video of said sporting event.

Claim 83

Dependent Claim 61 words

A method according to claim 70 , wherein: said one moving object is an automobile; said steps of acquiring GPS data, determining a location, receiving video, determining a position and editing said video are performed during an auto race; said video depicts said auto race; said step of acquiring GPS data is performed by a GPS receiver mounted on said automobile.

Claim 84

Dependent Claim 51 words

A method according to claim 70 , wherein said method further comprises the step of: receiving data from camera attitude sensors for a camera providing said video, said step of determining a position of an image uses said data from said camera attitude sensors to determined said position of said image.

Claim 85

Dependent Claim 35 words

A method according to claim 70 , wherein: said determined location is a three dimensional location in real space; and said determined said position of said image is a two dimensional position in said video.

Claim 86

Dependent Claim 15 words

A method according to claim 70 , wherein: error correction information includes differential GPS data.

Claim 87

Dependent Claim 15 words

A method according to claim 70 , wherein: error correction information is from a pseudolite.

Claim 88

Dependent Claim 50 words

A method according to claim 70 , wherein: said error correction information is used to correct said GPS data by a GPS receiver on said moving object; said corrected GPS data is sent to a central location; and said step of determining a location is performed at said central location.

Claim 89

Independent Claim 78 words

A method for tracking a moving object, comprising the steps of: acquiring GPS data for said moving object; receiving error correction information for said GPS data; determining a location of said moving object using said GPS data and said error correction information; receiving video of said moving object; determining one or more statistics about said moving object based on said determined location of said moving object; and editing said video based on said determined one or more statistics.

Claim 90

Independent Claim 78 words

A method for tracking a moving object, comprising the steps of: acquiring GPS data for said moving object; receiving error correction information for said GPS data; determining a location of said moving object using said GPS data and said error correction information; receiving video of said moving object; determining one or more statistics about said moving object based on said determined location of said moving object; and editing said video based on said determined one or more statistics.

Claim 91

Dependent Claim 22 words

A method according to claim 79 , wherein: said step of editing includes displaying said one or more statistics in said video.

Claim 92

Independent Claim 171 words

An apparatus for tracking a moving object, comprising: a GPS receiver mounted on said moving object, said GPS receiver acquires GPS data and receives error correction information for said GPS data, said GPS receiver determines location information of said moving object based on said GPS data and said error correction information; a first communication device mounted on said moving object and in communication with said GPS receiver to receive said, location information from said GPS receiver a second communication device, said second communication device receives said location information from said first communication device; one or more processing devices, at least one of said one or more processing devices is in communication with said second communication device and receives said location information from said second communication device, said one or more processing devices determine a position of an image of said moving object in a video using said location information and cause said video to be edited based on said determined position of said image of said moving object in said video.

Claim 93

Independent Claim 171 words

An apparatus for tracking a moving object, comprising: a GPS receiver mounted on said moving object, said GPS receiver acquires GPS data and receives error correction information for said GPS data, said GPS receiver determines location information of said moving object based on said GPS data and said error correction information; a first communication device mounted on said moving object and in communication with said GPS receiver to receive said, location information from said GPS receiver a second communication device, said second communication device receives said location information from said first communication device; one or more processing devices, at least one of said one or more processing devices is in communication with said second communication device and receives said location information from said second communication device, said one or more processing devices determine a position of an image of said moving object in a video using said location information and cause said video to be edited based on said determined position of said image of said moving object in said video.

Claim 94

Dependent Claim 39 words

An apparatus according to claim 81 , wherein: said GPS receiver determines said location information during an event that includes said moving object; and said one or more processing devices cause said video to be edited during said event.

Claim 95

Dependent Claim 51 words

An apparatus according to claim 81 , wherein: said moving object is an automobile; said GPS receiver determines said location information in real time during an automobile race; said video depicts said automobile race; and said one or more processing devices cause said video to be edited during said automobile race.

Claim 96

Dependent Claim 45 words

An apparatus according to claim 81 , further comprising: camera attitude sensors for a camera providing said video, said one or more processing devices use data from said camera attitude sensors to determine said position of said image of said moving object in said video.

Claim 97

Dependent Claim 15 words

An apparatus according to claim 81 , wherein: error correction information includes differential GPS data.

Claim 98

Dependent Claim 15 words

An apparatus according to claim 81 , wherein: error correction information is from a pseudolite.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2007-06-01	2007-12-01	2008-06-01	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2011-06-01	2011-12-01	2012-06-01	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2015-06-01	2015-12-01	2016-06-01	$7700.00	Window Closed / Lapsed

GPS based tracking system

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