JP2001133537A - Device for calculating coordinates, and computor- readable recording medium with coordinate calculating program recorded - Google Patents

Abstract

PROBLEM TO BE SOLVED: To calculate absolute coordinates of high quality in a short period using a data received by a GPS. SOLUTION: A base line analyzing means 10 executes base line analysis using GPS observation data collected by a GPS receive systems equipped in a point (unknown point) desired to calculate the absolute coordinates, a point (neighboring point) neighboring thereto, and a point (IGS point) opened by an agency such as the IGS. A broadcasting history, a prompt report history or a final history of the used GPS is selected in response to a measuring distance in the base line analysis. An absolute coordinate calculating means 12 updates all the time the absolute coordinates of the neighboring point and the IGS point using as a reference the IGS point where the absolute coordinates are defined. An absolute coordinate calculating means 14 calculates the absolute coordinates of the unknown point based on the absolute coordinates and the base line analysis between the unknown point - the neighboring point, or based on the absolute coordinates of the IGS point and the base line analysis result between the IGS - the unknown point.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coordinate calculation device using GPS baseline analysis and a computer-readable recording medium storing a coordinate calculation program.

[0002]

2. Description of the Related Art An example of a conventional GPS baseline analyzer is disclosed in Japanese Patent Application Laid-Open No. Hei 7-12918. This conventional G
The PS baseline analysis device can calculate a three-dimensional relationship between two places where the GPS receiving system is installed. In the GPS baseline analyzer of the above publication, the GPS calendar used for the baseline analysis is not mentioned, but the broadcast calendar and the final calendar are usually used.

[0003]

However, the above-mentioned prior art has the following problems.

The first problem is that absolute coordinates cannot be calculated for a position. The reason is that relative coordinates are managed without managing absolute coordinates.

[0005] The second problem is that a baseline analysis in consideration of measurement accuracy has not been performed in the shortest time since the breaking and final calendars of GPS were released. The reason is that the base line analysis is not performed in consideration of an optimal combination of a calendar such as a GPS bulletin, the last calendar, and the distance between two points for base line analysis. Usually, the GPS calendar is released several days after the broadcast calendar, and the final calendar is released about half a month after the broadcast calendar. The use of the final calendar as compared to the preliminary calendar improves the accuracy of the baseline analysis several times.
The characteristics of these data need to be considered.

[0006]

SUMMARY OF THE INVENTION It is a first object of the present invention to provide a coordinate calculating apparatus capable of calculating absolute coordinates using GPS and a computer-readable recording medium storing a coordinate calculating program. A second object of the present invention is to provide a coordinate calculation device capable of calculating absolute coordinates at an optimal timing in consideration of the characteristics of a GPS calendar used for calculation, and a computer-readable recording medium storing a coordinate calculation program. To provide.

[0007]

A coordinate calculating apparatus according to the present invention comprises a base line analyzing means, an absolute coordinate managing means and an absolute coordinate calculating means. Here, IGS (International
A point managed by an organization such as GPS Service (international GPS business) is an IGS point, a point whose absolute coordinates are to be calculated is a non-point, and a point close to the non-point is a perigee. Baseline analysis means inputs GPS calendar data and GPS observation data at IGS points, non-points and perigees, and performs baseline analysis between IGS points and perigee, between IGS points and non-points, and between perigee and non-points. Calculates and outputs a three-dimensional relationship between the two points. The absolute coordinate management means inputs the absolute coordinates of the IGS point provided from an organization such as the IGS and the result of the baseline analysis between the IGS point and the perigee, and manages and outputs the absolute coordinates of the IGS point and the perigee. The absolute coordinate calculation means inputs the base line analysis result between the IGS point and the non-point output by the base line analysis means and the absolute coordinates of the IGS point output by the absolute coordinate management means, or the perigee output by the base line analysis means. The result of the baseline analysis between the non-points and the absolute coordinates of the perigee output by the absolute coordinate management means are input, and the absolute coordinates of the non-points are calculated.

The GPS calendar data includes, for example, a calendar such as a GPS broadcast calendar, a flash calendar, and a final calendar, and earth rotation parameters. The base line analyzing means performs a base line analysis between the perigee and the non-point immediately after inputting the GPS observation data, and after a short time after inputting the GPS observation data, inputs a GPS final history and then an IGS point-perigee, an IGS point- Baseline analysis between non-points may be performed. The absolute coordinate calculation means calculates the perigee and non-point G before calculating the non-point absolute coordinates.
The quality of the PS observation data may be determined. In this case, the quality determination means, for example, the quality of information used for the baseline analysis, such as whether or not the GPS observation data continuously exists and whether or not the system receiving the GPS observation data is normal. Is determined.

In other words, the coordinate calculating apparatus according to the present invention comprises: an absolute coordinate management means for inputting a result of the baseline analysis to a baseline analysis means for performing a baseline analysis using a GPS broadcast calendar, a flash calendar, a final calendar, and the like; An absolute coordinate calculation means is provided. The absolute coordinate management means always updates the absolute coordinates of the position provided by the institution such as IGS and the absolute coordinates of the position not calculated by the institution such as IGS which is calculated based on the absolute coordinate. Perform an action that: The absolute coordinate calculating means executes an operation of calculating the absolute coordinates from the baseline analysis result with reference to the absolute coordinates managed by the absolute coordinate managing means. At this time, in the case where the calculated base line length is short, a base line analysis result using a GPS broadcast calendar or a flash calendar is used. On the other hand, if the calculated base line length is long, a base line analysis result using the last calendar of GPS is used.

In the last calendar of GPS, the accuracy of the calendar is high, but the time when data can be obtained is late. Therefore, it is suitable for a baseline analysis having a long baseline length. On the other hand, in the GPS broadcast calendar and the flash calendar, the accuracy of the calendar is reduced, but the data can be obtained earlier. For this reason, it is suitable for baseline analysis in which the baseline length is short. Therefore, the coordinate calculation device according to the present invention can calculate the absolute coordinates while maintaining the calculation accuracy.

In other words, the coordinate calculating device according to the present invention is installed at a point (absolute point) where absolute coordinates are to be calculated, a point near it (perigee), or a point (IGS point) disclosed by an organization such as IGS. Baseline analysis is performed using the GPS observation data collected by the GPS receiving system. The base line analysis uses G to be used according to the distance to be measured.
This is performed by selecting a PS broadcast calendar, bulletin calendar, or final calendar. On the other hand, the absolute coordinates of the perigee and the IGS point are constantly updated with reference to the IGS point where the absolute coordinates are defined. Then, the absolute coordinates of the non-point are calculated from the absolute coordinates of the perigee and the baseline analysis result between the non-point and the perigee obtained by the above function. Also, the absolute coordinates of the IGS point and I
The absolute coordinates of the unknown point are calculated from the result of the baseline analysis between the GS point and the non-point. Thus, high-quality absolute coordinates are calculated in a short time using the GPS reception data.

A computer-readable recording medium on which a coordinate calculation program according to the present invention is recorded is a semiconductor memory, a magnetic recording medium, and an optical recording medium on which a program is recorded for causing a computer to function as each unit of the coordinate calculation apparatus according to the present invention. Medium.

[0013]

FIG. 1 is a functional block diagram showing a first embodiment of a coordinate calculating apparatus according to the present invention. Less than,
Description will be made based on this drawing.

The baseline analysis means 10 includes "GPS calendar data" including calendars such as a GPS broadcast calendar, a flash calendar, a final calendar, and earth rotation parameters provided by an organization such as an IGS;
Input the "GPS observation data" at a point managed by S (IGS point), a point at which absolute coordinates are to be calculated (not yet point), and a point at a short distance from the not yet point (perigee),
Baseline analysis is performed between the IGS point and the perigee, between the IGS point and the non-point, and between the perigee and the non-point, and a three-dimensional relationship between these two points is calculated and output.

The absolute coordinate management means 12 inputs the absolute coordinates of the IGS point provided from an engine such as the IGS and the results of the baseline analysis between the IGS point and the perigee, and manages the absolute coordinates of the IGS point and the perigee. , And output its absolute coordinates. Since the IGS point and the perigee are usually far apart, this baseline analysis uses the GPS final calendar to improve calculation accuracy.

The absolute coordinate calculating means 14 includes the base line analyzing means 1
Then, the result of the baseline analysis between the IGS point and the non-point output by 0 and the absolute coordinates of the IGS point output by the absolute coordinate management means 12 are input, and the absolute coordinates of the non-point are calculated. Usually, the IGS point and the non-point are far from each other.
By using the last calendar, the calculation accuracy is improved. In addition, a base line analysis result between the non-point and the perigee output from the base line analyzing means 10 and the absolute coordinates of the perigee output from the absolute coordinate management means 12 are input, and the absolute coordinates of the non-point are output. Because the perigee and the non-perigee are near, this baseline analysis
Although a GPS bulletin calendar or a broadcast calendar, which is less accurate than the GPS final calendar, is used, there is no problem in the calculation accuracy.

[0017] Baseline analysis using GPS, GPS flash report, broadcast calendar, final calendar, earth rotation parameters and IG
Since S is well known to those skilled in the art,
The detailed description is omitted.

FIG. 2 and FIG. 3 are flowcharts showing the operation of the coordinate calculation device of FIG. Hereinafter, description will be made with reference to FIGS.

The IGS point, perigee and non-point vary depending on the configuration of the system and the policy of an information provider such as IGS. Therefore, information on whether or not it is necessary to change them is input by the operator to the coordinate calculation device, and the coordinate calculation device determines based on the information (step 101). When it is necessary to change the IGS point, perigee, and non-point, the registration as the IGS point, perigee, and non-point used for the baseline analysis is changed (step 102). When the change is unnecessary, this processing is not performed. . Then, IGS and other organizations provided a new GPS
It is confirmed whether or not the last calendar is released (step 10).
3). Here, when the new GPS final calendar is released, the baseline analysis between the IGS point and the perigee is performed using the newly released GPS final calendar, and the three-dimensional relationship between the two points is determined. It is determined (step 104). In addition, the IGS point
Baseline analysis between unpoints is also performed using the newly published final calendar of GPS to determine a three-dimensional relationship between the two points (step 104). Subsequently, it is confirmed whether or not the GPS preliminary calendar provided by an organization such as IGS has been newly released (step 105). When a new GPS ephemeris is released, a baseline analysis is performed using the ephemeris and the perigee-
A three-dimensional relationship between unpoints is determined (step 106).
On the other hand, if a new GPS bulletin is not released,
A base line analysis is performed using the broadcast calendar of S, and a three-dimensional relationship between perigee and non-point is obtained (step 107). More than,
5 is a flowchart of an operation in the baseline analysis unit 10.

Subsequently, it is confirmed whether or not the absolute coordinates of the IGS point exist (step 108). If the absolute coordinates of the IGS point exist, the absolute coordinates of the IGS point are updated (step 109). Subsequently, the three-dimensional relationship between the IGS point and the perigee calculated by the baseline analysis means 10 and the IGS
The absolute coordinates of the perigee are updated from the absolute coordinates of the point (step 110). The above is the flow of the operation in the absolute coordinate management unit 12.

Subsequently, the I calculated by the baseline analysis means 10 is calculated.
From the three-dimensional relationship between the GS point and the non-point, and the absolute coordinates of the IGS point updated by the absolute coordinate management means 12, the absolute coordinates of the non-point are calculated and output (step 111). Subsequently, the absolute coordinates of the non-point are calculated from the three-dimensional relation between the perigee and the non-point calculated by the baseline analysis means 10 and the absolute coordinates of the perigee updated by the absolute coordinate management means 12 and output. (Step 112). The above is the flow of the operation in the absolute coordinate calculation means 14.

As described above, in the coordinate calculating apparatus according to the present embodiment, the last calendar of the GPS is used for the baseline analysis based on the IGS point which is far from the non-point, and the perigee whose distance from the non-point is short is determined. Since the absolute coordinates are calculated using the GPS bulletin or the broadcast calendar for the baseline analysis as a reference, the absolute coordinates of unplaced points can be calculated while maintaining the calculation accuracy regardless of the GPS calendar used. . In addition, always the latest GPS
Since it has a function to use the final calendar and breaking calendar of
In the shortest time since the last calendar of the GPS and the preliminary calendar are released, the absolute coordinates of a non-point can be calculated.

In the above embodiment, the IGS point is used as a reference for the absolute coordinates. However, a GPS receiver is installed.
When the GPS observation data and the exact absolute coordinates of the point are disclosed, the point may be processed as an IGS point. In addition, as the perigee, a GPS receiver is installed at a short distance from a non-point, and the GPS observation data is not used, but it is released as electronic reference point data managed by the Geographical Survey Institute. GPS observation data may be used.

FIG. 4 is a flowchart showing the operation of the second embodiment of the coordinate calculation device according to the present invention. Hereinafter, description will be made based on this drawing.

The basic configuration and operation of the coordinate calculation apparatus of the present embodiment are as described above, but the quality of GPS observation data used for baseline analysis is devised. The flowchart shown in FIG. 4 replaces the operation (steps 111 to 112) of the absolute coordinate calculation means 14 in FIG.

Before calculating the position of the non-point from the baseline analysis result between the IGS point and the non-point (step 112a),
The quality of the GPS observation data at the GS point and the non-point is determined (step 111a). As a result, if there is no problem, the position of a non-point is calculated. Further, the position of the non-point is calculated from the result of the baseline analysis between the perigee and the non-point (step 11).
4a) Before, the quality of the GPS observation data of the perigee and the non-perimeter is determined (step 113a). As a result, if there is no problem, the position of a non-point is calculated.

The “quality judgment” here means, for example, G
Whether or not PS observation data exists continuously, GPS
Whether the system receiving the observation data is normal, etc.
The purpose is to determine the quality of information used for baseline analysis.
As described above, in the present embodiment, since the quality of the GPS observation data is determined, it is possible to eliminate a cause of accuracy deterioration caused by the observation data.

The computer-readable recording medium on which the coordinate calculation program according to the present invention is recorded is a semiconductor which stores a program for causing a computer to function as the baseline analysis means 10, the absolute coordinate management means 12, and the absolute coordinate calculation means 14. Examples include a memory, a magnetic recording medium, and an optical recording medium.

[0029]

As described above, the present invention has the following advantages.

The first effect is that the absolute coordinates of a non-point can be calculated. The reason is that the GPS receiving system has a function of managing absolute coordinates at a selected point.

The second effect is that the absolute coordinates can be calculated in consideration of the measurement accuracy. The reason is that a combination of a distance for performing the baseline analysis and a GPS broadcast calendar, a flash calendar, and a final calendar used for the baseline analysis is considered.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing a first embodiment of a coordinate calculation device according to the present invention.

FIG. 2 is a flowchart showing an operation of the coordinate calculation device of FIG. 1;

FIG. 3 is a flowchart illustrating an operation of the coordinate calculation device of FIG. 1;

FIG. 4 is a flowchart showing an operation of the second embodiment of the coordinate calculation device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Baseline analysis means 12 Absolute coordinate management means 14 Absolute coordinate calculation means

Claims (6)

[Claims] 1. A point managed by an institution such as IGS
Assuming that the GS point, the point at which the absolute coordinates are to be calculated is an unspot, and a point close to the unspot is a perigee, GPS calendar data and the IGS point, the GPS observation data at the unspot and the perigee are input, IGS
Baseline analysis means for performing a baseline analysis between a point and the perigee, between the IGS point and the non-point, and between the perigee and the non-point, calculating and outputting a three-dimensional relationship between these two points, Absolute coordinate management means for inputting the absolute coordinates of the IGS point and the baseline analysis result between the IGS point and the perigee provided from an engine such as an IGS and managing and outputting the absolute coordinates of the IGS point and the perigee And the input of the baseline analysis result between the IGS point and the non-point output by the baseline analysis means and the absolute coordinates of the IGS point output by the absolute coordinate management means, or the output by the baseline analysis means A coordinate calculation device comprising: a base line analysis result between the perigee and the non-point; and the absolute coordinates of the perigee output from the absolute coordinate management means, and an absolute coordinate calculation means for calculating the absolute coordinates of the non-point. . 2. The coordinate calculation device according to claim 1, wherein the GPS calendar data includes a calendar such as a GPS broadcast calendar, a bulletin calendar, a final calendar, and earth rotation parameters. 3. The baseline analysis means performs a baseline analysis between the perigee and the non-point immediately after inputting the GPS observation data, and after a short time after inputting the GPS observation data, inputting a GPS final history. The coordinate calculation device according to claim 1, wherein a baseline analysis is performed between the IGS point and the perigee and between the IGS point and a non-point. 4. The method according to claim 1, wherein the absolute coordinate calculation unit determines the quality of the GPS observation data of the perigee and the non-point before calculating the absolute coordinates of the non-point. Coordinate calculation device. 5. The quality judgment is used for the baseline analysis such as whether or not the GPS observation data is continuously present and whether or not the system receiving the GPS observation data is normal. The coordinate calculation device according to claim 4, wherein the quality of information to be performed is determined. 6. A point managed by an institution such as IGS
Assuming that the GS point, the point at which the absolute coordinates are to be calculated is an unspot, and a point close to the unspot is a perigee, GPS calendar data and the IGS point, the GPS observation data at the unspot and the perigee are input, IGS
Baseline analysis means for performing a baseline analysis between the point and the perigee, between the IGS point and the non-point, and between the perigee and the non-point, calculating and outputting a three-dimensional relationship between these two points, the IGS; Absolute coordinate management means for inputting the absolute coordinates of the IGS point and the baseline analysis result between the IGS point and the perigee, and managing and outputting the absolute coordinates of the IGS point and the perigee. And inputting a baseline analysis result between the IGS point and the non-point output by the base line analysis means and the absolute coordinates of the IGS point output by the absolute coordinate management means, and calculating the absolute coordinates of the non-point. Or the input of the base line analysis result between the perigee and the unmeasured point output by the base line analysis means and the absolute coordinate of the perigee output by the absolute coordinate management means, and calculating the absolute coordinate of the unmeasured point As a standard calculation means, a computer-readable recording medium recording a coordinate calculating program for causing a computer to function.