US6144335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automated differential correction processing of field data in a global positional system
Assignee: Trimble Inc
•
Filing: 1998-04-14
•
Granted: 2000-11-07
•
Expires: 2018-04-14
Abstract
Abstract A system and method for automated differential correction processing of field data in a global positioning system (GPS). In one embodiment, the present invention retrieves GPS field data collected by one or more GPS receivers from a storage device, and then automatically selects the most appropriate differential correction scheme to generate a solution without user intervention. More specifically, the present invention executes a code-based correction scheme to generate a code-based solution for the field data. Next, the present invention examines the field data to determine whether a carrier phase correction is applicable. If the field data supports carrier phase correction, the present invention generates a carrier phase solution, compares it with the code-based solution, and returns the more accurate of the two solutions as the final result. If the field data does not support a carrier phase correction, the present invention returns the code-based solution as the final result. Thus, the present invention provides a system and method for post-processing of GPS field data which does not require a user to know and understand the contents of the field data, to deal with multiple user interfaces, or to read and interpret different results generated by various processing schemes. In other words, the present invention provides a single software package for post-processing of GPS field data without extensive user involvement. As such, the present invention greatly reduces the complexity of GPS field data post-processing and enhances the usability of GPS equipment.
Inventors
- 👤 John F. Rogers
- 👤 Peter Glen France
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:54
CPC Classifications
G; G01; G01S; G01S19/00; G01S19/38; G01S19/39; G01S19/40; G01S19/41; G01S19/42; G01S19/43
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
81 words
In a global positioning system (GPS), a method for differential correction processing of a set of GPS field data, said method comprising the computer implemented steps of: a) retrieving said set of GPS field data from a field data storage device; b) automatically identifying a most appropriate one of a plurality of correction schemes for said set of GPS field data; and c) generating a differential GPS solution for said set of GPS field data with said most appropriate correction scheme.
Claim 2
Dependent Claim
81 words
In a global positioning system (GPS), a method for differential correction processing of a set of GPS field data, said method comprising the computer implemented steps of: a) retrieving said set of GPS field data from a field data storage device; b) automatically identifying a most appropriate one of a plurality of correction schemes for said set of GPS field data; and c) generating a differential GPS solution for said set of GPS field data with said most appropriate correction scheme.
Claim 3
Dependent Claim
93 words
The method as recited in claim 1 wherein said step b) further comprises the computer implemented steps of: b1) executing a first correction scheme to generate a first solution; b2) determining whether a second correction scheme is applicable to said set of GPS field data; b3) provided that said second correction scheme is applicable, analyzing said set of GPS field data to generate a second solution according to said second correction scheme; and b4) selectively identifying a more accurate one of said first solution and said second solution as said differential GPS solution.
Claim 4
Dependent Claim
32 words
The method as recited in claim 2 further comprising the computer implemented step of: b5) provided that said second correction scheme is inapplicable, identifying said first solution as said differential GPS solution.
Claim 5
Dependent Claim
65 words
The method as recited in claim 2 wherein said step b4) further comprises the computer implemented steps of: analyzing said set of GPS field data to generate a first accuracy indicator pertaining to said first solution; analyzing said set of GPS field data to generate a second accuracy indicator pertaining to said second solution; and comparing said first accuracy indicator and said second accuracy indicator.
Claim 6
Dependent Claim
58 words
The method as recited in claim 2 wherein said step b3) further comprises the computer implemented steps of: executing a third correction scheme; determining whether said third correction scheme is successful in generating a third solution; and provided that said third correction scheme is successful in generating said third solution, identifying said third solution as said second solution.
Claim 7
Dependent Claim
91 words
The method as recited in claim 5 wherein said step b3) further comprises the computer implemented steps of: provided that said third correction scheme is unsuccessful in generating said third solution, executing a fourth correction scheme; determining whether said fourth correction scheme is successful in generating a fourth solution; provided that said fourth correction scheme is successful in generating said fourth solution, identifying said fourth solution as said second solution; and provided that said fourth correction scheme is unsuccessful in generating said fourth solution, indicating that said second solution is unachievable.
Claim 8
Dependent Claim
17 words
The method as recited in claim 2 wherein said first correction scheme is a code-based correction scheme.
Claim 9
Dependent Claim
18 words
The method as recited in claim 2 wherein said second correction scheme is a carrier phase correction scheme.
Claim 10
Dependent Claim
18 words
The method as recited in claim 5 wherein said third correction scheme is a fixed integer correction scheme.
Claim 11
Dependent Claim
18 words
The method as recited in claim 6 wherein said fourth correction scheme is a floating point correction scheme.
Claim 12
Dependent Claim
27 words
The method as recited in claim 4 wherein said first accuracy indicator and said second accuracy indicator are statistically computed from said set of GPS field data.
Claim 13
Dependent Claim
15 words
The method as recited in claim 1 wherein said method is performed without user intervention.
Claim 14
Dependent Claim
100 words
A computer system including a processor, an address/data bus coupled to said processor, and a computer readable memory coupled to communicate with said processor, said processor for performing a method for differential correction processing in a global positioning system (GPS), said method comprising the steps of: a) retrieving a set of GPS field data from a field data storage device; b) automatically identifying a most appropriate one of a plurality of correction schemes for said set of GPS field data; and c) generating a differential GPS solution for said set of GPS field data with said most appropriate correction scheme.
Claim 15
Dependent Claim
100 words
A computer system including a processor, an address/data bus coupled to said processor, and a computer readable memory coupled to communicate with said processor, said processor for performing a method for differential correction processing in a global positioning system (GPS), said method comprising the steps of: a) retrieving a set of GPS field data from a field data storage device; b) automatically identifying a most appropriate one of a plurality of correction schemes for said set of GPS field data; and c) generating a differential GPS solution for said set of GPS field data with said most appropriate correction scheme.
Claim 16
Dependent Claim
92 words
The computer system as recited in claim 13 wherein said step b) further comprises the steps of: b1) executing a first correction scheme to generate a first solution; b2) determining whether a second correction scheme is applicable to said set of GPS field data; b3) provided that said second correction scheme is applicable, analyzing said set of GPS field data to generate a second solution according to said second correction scheme; and b4) selectively identifying a more accurate one of said first solution and said second solution as said differential GPS solution.
Claim 17
Dependent Claim
31 words
The computer system as recited in claim 14 further comprising the step of: b5) provided that said second correction scheme is inapplicable, identifying said first solution as said differential GPS solution.
Claim 18
Dependent Claim
64 words
The computer system as recited in claim 14 wherein said step b4) further comprises the steps of: analyzing said set of GPS field data to generate a first accuracy indicator pertaining to said first solution; analyzing said set of GPS field data to generate a second accuracy indicator pertaining to said second solution; and comparing said first accuracy indicator and said second accuracy indicator.
Claim 19
Dependent Claim
57 words
The computer system as recited in claim 14 wherein said step b3) further comprises the steps of: executing a third correction scheme; determining whether said third correction scheme is successful in generating a third solution; and provided that said third correction scheme is successful in generating said third solution, identifying said third solution as said second solution.
Claim 20
Dependent Claim
90 words
The computer system as recited in claim 17 wherein said step b3) further comprises the steps of: provided that said third correction scheme is unsuccessful in generating said third solution, executing a fourth correction scheme; determining whether said fourth correction scheme is successful in generating a fourth solution; provided that said fourth correction scheme is successful in generating said fourth solution, identifying said fourth solution as said second solution; and provided that said fourth correction scheme is unsuccessful in generating said fourth solution, indicating that said second solution is unachievable.
Claim 21
Dependent Claim
18 words
The computer system as recited in claim 14 wherein said first correction scheme is a code-based correction scheme.
Claim 22
Dependent Claim
19 words
The computer system as recited in claim 14 wherein said second correction scheme is a carrier phase correction scheme.
Claim 23
Dependent Claim
19 words
The computer system as recited in claim 17 wherein said third correction scheme is a fixed integer correction scheme.
Claim 24
Dependent Claim
19 words
The computer system as recited in claim 18 wherein said fourth correction scheme is a floating point correction scheme.
Claim 25
Dependent Claim
28 words
The computer system as recited in claim 16 wherein said first accuracy indicator and said second accuracy indicator are statistically computed from said set of GPS field data.
Claim 26
Dependent Claim
16 words
The computer system as recited in claim 13 wherein said method is performed without user intervention.
Claim 27
Dependent Claim
78 words
In a global positioning system (GPS), a computer-usable medium having computer-readable program code embodied therein for causing a computer to perform the steps of: a) retrieving a set of GPS field data from a field data storage device; b) automatically identifying a most appropriate one of a plurality of correction schemes for said set of GPS field data; and c) generating a differential GPS solution for said set of GPS field data with said most appropriate correction scheme.
Claim 28
Dependent Claim
78 words
In a global positioning system (GPS), a computer-usable medium having computer-readable program code embodied therein for causing a computer to perform the steps of: a) retrieving a set of GPS field data from a field data storage device; b) automatically identifying a most appropriate one of a plurality of correction schemes for said set of GPS field data; and c) generating a differential GPS solution for said set of GPS field data with said most appropriate correction scheme.
Claim 29
Dependent Claim
92 words
The computer-usable medium as recited in claim 25 wherein said step b) further comprises the steps of: b1) executing a first correction scheme to generate a first solution; b2) determining whether a second correction scheme is applicable to said set of GPS field data; b3) provided that said second correction scheme is applicable, analyzing said set of GPS field data to generate a second solution according to said second correction scheme; and b4) selectively identifying a more accurate one of said first solution and said second solution as said differential GPS solution.
Claim 30
Dependent Claim
31 words
The computer-usable medium as recited in claim 26 further comprising the step of: b5) provided that said second correction scheme is inapplicable, identifying said first solution as said differential GPS solution.
Claim 31
Dependent Claim
64 words
The computer-usable medium as recited in claim 26 wherein said step b4) further comprises the steps of: analyzing said set of GPS field data to generate a first accuracy indicator pertaining to said first solution; analyzing said set of GPS field data to generate a second accuracy indicator pertaining to said second solution; and comparing said first accuracy indicator and said second accuracy indicator.
Claim 32
Dependent Claim
57 words
The computer-usable medium as recited in claim 26 wherein said step b3) further comprises the steps of: executing a third correction scheme; determining whether said third correction scheme is successful in generating a third solution; and provided that said third correction scheme is successful in generating said third solution, identifying said third solution as said second solution.
Claim 33
Dependent Claim
90 words
The computer-usable medium as recited in claim 29 wherein said step b3) further comprises the steps of: provided that said third correction scheme is unsuccessful in generating said third solution, executing a fourth correction scheme; determining whether said fourth correction scheme is successful in generating a fourth solution; provided that said fourth correction scheme is successful in generating said fourth solution, identifying said fourth solution as said second solution; and provided that said fourth correction scheme is unsuccessful in generating said fourth solution, indicating that said second solution is unachievable.
Claim 34
Dependent Claim
18 words
The computer system as recited in claim 26 wherein said first correction scheme is a code-based correction scheme.
Claim 35
Dependent Claim
19 words
The computer system as recited in claim 26 wherein said second correction scheme is a carrier phase correction scheme.
Claim 36
Dependent Claim
19 words
The computer system as recited in claim 29 wherein said third correction scheme is a fixed integer correction scheme.
Claim 37
Dependent Claim
19 words
The computer system as recited in claim 30 wherein said fourth correction scheme is a floating point correction scheme.
Claim 38
Dependent Claim
28 words
The computer system as recited in claim 28 wherein said first accuracy indicator and said second accuracy indicator are statistically computed from said set of GPS field data.
Claim 39
Dependent Claim
16 words
The computer system as recited in claim 25 wherein said steps are performed without user intervention.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-11-07 | 2004-05-08 | 2004-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-11-07 | 2008-05-08 | 2008-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-11-07 | 2012-05-08 | 2012-11-07 | $7700.00 | Window Closed / Lapsed |