SY/T 10019-1998 Technical specification for real-time differential global positioning system (DGPS) positioning measurement at sea
Some standard content:
ICS75.020
Registration number: 1990—1998
People's Republic of China Offshore Oil and Gas Industry Standard SY/T10019—1998
Offshore Real-time Differential Global Positioning System
(DGPS) Positioning Measurement Technical Specifications
Technical Specifications for Offshore Real Time DGPS Positioning and Survey
Published on July 20, 1998
China National Offshore Oil Corporation
Implemented on March 1, 1999
SYIT10019:1998
Cited Standards
Basic Requirements
4 System Calibration
Real-time X-ray Measurement and Quality Control
Collation of External Data
Appendix A (Suggested Appendix) Reference Sphere Basic Parameters: ||Appendix B: Suggested Appendix) Determination and use of coordinate transformation parameters Appendix C (Tyr's Appendix) IX Preparation of GPS positioning measurement operation report
SYJT10H19—1998
This standard is based on the original enterprise standard Q/COGC.T102.01-1995 "Technical Standard for GPS Measurement of Offshore Oil Operations", referring to the technical requirements of production operations in the same industry at home and abroad in recent years, and absorbing the practical experience of offshore geophysical exploration. In terms of content, this standard deletes the radio positioning system part of the original enterprise standard of the factory, and adds quality control and other contents: and according to the provisions of 4.2.3.3 in the national standard (B1.11993). Add "Foreword" This standard will be implemented on March 1, 1999. From March 1, 1999, all offshore real-time differential global positioning system (DGPS) positioning measurement operations shall comply with the provisions of this standard.
Appendix A, Appendix B, and Appendix C of this standard are prompt appendices. This standard was proposed and managed by China National Offshore Oil Corporation. The drafting unit of this standard is China National Offshore Oil Corporation. Ten drafters of this standard: Xu Jianmin, Qiao Yuyin. The chief reviewer of this standard: Zeng Wangxian,
Policy statement
Offshore oil and gas industry standard publications are only for general nature issues. National and local laws and regulations should be consulted when specific situations are involved.
Offshore oil and gas industry standards publications do not undertake to provide users, manufacturers or suppliers with advance notice and training on health, safety and hazard prevention for their employees and other on-site operators, nor do they assume any responsibilities under national and local regulations. The content of any offshore oil and gas industry standards publication shall not be construed, implicitly or otherwise, as granting any right to manufacture, sell or use any method, equipment or product involving patent rights, nor shall it assume liability for any person who infringes patent rights. Generally, offshore oil and gas industry standards are reviewed, revised, re-identified or revoked at least every five years. Sometimes, this review period can be extended by one year, up to a maximum of two years, so the publication is no longer required. From the date of publication, its validity period shall not exceed five years unless an extension of validity period is authorized. Information on publications may be obtained from the Secretariat of the Offshore Oil and Gas Industry Standardization Technical Committee (Tel. 010-64610022-7875, mailing address: Standardization Office, Offshore Oil Production Research Center, Box 235, Beijing, zip code 101149) or the Offshore Oil and Gas Industry Standardization Technical Committee (Tel. 010-64665361, mailing address: Offshore Oil Science and Technology Office, 25th Floor, Dongjingxin Building, Sanyuanqiao, Beijing, zip code 100027).
The purpose of issuing offshore oil and gas industry standards is to promote proven, good engineering technologies and operating practices. It is not intended to eliminate the need to make correct judgments on when and where to apply these technologies and practices. Offshore Oil and Gas Industry The development and publication of industry standards are not intended to restrict anyone from adopting any other technology or practice in any way. This standard is available to anyone who wishes to adopt it. The Offshore Oil and Gas Industry Standardization Technical Committee and its authorized issuing units have made every effort to ensure the accuracy and reliability of the data contained therein. However, the Offshore Oil and Gas Industry Standardization Technical Committee and its authorized issuing units do not represent, guarantee or warrant the standards they publish, and hereby expressly state that the Offshore Oil and Gas Industry Standardization Technical Committee and its authorized issuing units do not assume any obligations or responsibilities for losses or damages caused by the use of these standards, for the use of standards that may conflict with any national and local regulations, and for the consequences of infringement of any patent rights caused by the use of these standards.
1 Scope
Technical Specification for Offshore RealTimeDGPS Positioning and Survey
SY/T10019-1998
This standard specifies the technical methods and accuracy requirements for offshore differential global positioning system (DGPS) positioning and survey operations. This standard is applicable to the surveying services of offshore oil exploration and development operations and related operations in my country. 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication of the standard, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest version of the following standards. SY/T5927-94 Petroleum Geophysical Exploration Global Positioning System (GPS) Measurement Specification 3 Basic Requirements
The selection principle of the positioning system mainly includes the following contents: 3.1
a) The accuracy required by the operation should be guaranteed, and the effective distance should cover the entire operation area
The navigation function should meet the requirements of the operation and construction d) It should be stable and reliable and have the ability to operate continuously. 3.2DGPS Reference Station
3.2.1 Radio Data Transmission Chain
3.2.1.1 Signal propagation should meet the following conditions: a) There should be no obstacles between the reference station and the operation area, such as tall buildings, mountains, etc.; the reference station signal should try to shorten the distance through the land b) There should be no strong
signal interference sources near the reference station, and the distance from the high-power radio transmission source (such as TV stations, microwave stations, etc.) should be no less than 400m; and the distance from the high-voltage power grid should be no less than 200m. 3.2.1.2 Site conditions should meet the following requirements: a) The distance from the reference station to the work area should not be greater than 2000km:
b) Depending on the positioning system, there should be sufficient space for the station c) The station should have a wide field of view, there should be no major obstacles within 50m, and the elevation angle of obstacles beyond 50m should be less than 10°3.2.1.3 The station antenna position should meet the following conditions! a) The position of the GPS satellite receiving antenna should be obtained from the regional unified geodetic control point joint measurement. The joint measurement method should comply with the provisions of Chapter 5 of SY/T5927-94. The antenna position measurement error should be less than 1m; b) The distance between the GPS satellite receiving antenna and the differential signal transmitting antenna is required to be 10m-30m. 3.3 The installation of the mobile station should meet the following conditions: Approved by China National Offshore Oil Corporation on July 20, 1998 and implemented on March 1, 1999
SY/T 10019—1998
a) The GPS satellite receiving antenna should be installed at a higher position of the carrier: b) There should be no large obstacles above 5° around the satellite receiving antenna; d) The offset from the GPS satellite receiving antenna to the reference point of the operating vessel should be measured; 3.4 Coordinate system and projection method
The LXGPS system adopts the WGS-84 coordinate system and the projection method is TM. 3.5 Positioning accuracy requirements
During the operation, the deviation of more than 95% of the points should meet the following requirements: a) Short-range system (40km) 3m; b) Medium-range system (40km-50km) ≤5m; c) Long-range system (500km) ≤7mg
4 System calibration
4.1 If there are known points in the work area, at least 500 data observations should be made at the known points before the operation begins, with an interval of not less than 5×, and the calculated position deviation should meet the requirements of 3.5
4.2 If there are no known points in the work area, but there are multi-system equipment, the differential signals of several reference stations can be observed simultaneously before the operation begins, and the calculated differential position can be cross-checked. The position deviation meets the requirements of 3.5: 5 Real-time DGFS positioning and quality control
5.1 During the operation, the mobile station and the reference station should be able to receive signal data from at least four GPS satellites at the same time. Only when it is confirmed that the geometric distribution of the two satellites has no effect on the position accuracy can the known elevation be used to obtain the three-dimensional mark, but the height difference between the correct geoid and the spherical surface used should be obtained.
5.2 The update rate of the DGPS pseudo-range difference value is 3 s and should not be less than 10 s.5.3 The satellite geometric figure intensity factor (PTXOP) value should be less than 5.5.4 If the differential data is interrupted for more than 60 s, the data cannot be used. 6 Field data collation
6.1 Navigation notes
6.1.1 The notes should record the operation status, equipment failures and problems encountered during the operation. 6.1.2 It must be filled in real time on site, and no auxiliary calculations should be made on the records. 6.2 Printing data
6.2.1 The content of the printed data should be noted.
6.2.2 No part of it may be altered or torn off, and no auxiliary calculations may be made on the printed results. 6.3 Disk/Tape Records
6.3.1 The format of the positioning disk/tape record should be UKOOA format. 6.3.2 The original positioning data should generally include the following: a) Survey line number:
b) Point number:
c) Longitude;
d) Latitude:
Compass data;
d) Elevation;
Record number:
GPS time;
SY/T10019-1998
PDOP and horizontal position geometric accuracy factor (HIYOP) values must be attached to the disk/tape label, the content should include: Operation area;
Survey line number:
Start and end point number/gun number:
Record format;
Operation vessel identification; bzxz.net
Operation period
SY/T10019-1998
Appendix A
(Suggested Appendix)
Reference ellipse Basic parameters of sphere
Basic parameters of ellipsoid in WGS-84 coordinate system Major radius
Short radius
a=6378137m;
b=6356752.3142m:
Q-1/298.257223563;
First eccentricity squared e-0.00669437999013: Second eccentricity squared C-0.006739496742227S
B17 parameters coordinate transformation
SY/T10019-1998
Appendix B
(Suggestive appendix)
Determination and use of coordinate transformation parameters
7 parameters are often used for conversion between various coordinates internationally, and are a common method for coordinate transformation in the world or large areas. Internationally, there are various conversion parameters between world coordinate systems and commonly used regional coordinate systems. Domestic operations can use the following as long as the coordinate system used corresponds to these coordinate systems:
To obtain 7 parameters in a local area, at least 4 known points with accurate coordinates of two coordinate systems are evenly distributed in the area, and they are determined by using the least squares adjustment method. The meanings of each parameter in the 7-parameter conversion are as follows: a) Coordinate translation Ax, Ay, Az;
b) Coordinate axis rotation: dx, dy, dz;
c) Unit conversion: k.
B23-parameter coordinate conversion
3-parameter coordinate conversion is a common method for converting between various coordinate systems in a local area. The 3-parameter coordinate conversion method should not be used in larger areas. At present, some regions and departments have published or used some 3-parameter conversion parameters between coordinate systems, which can be used as appropriate. To obtain the 3-parameter transformation in a local area, at least 2 known points with accurate coordinates of two coordinate systems are evenly distributed in the area. The meaning of each parameter in the transformation is as follows: Coordinate translation: △x, Ay, Az. The method of multiplication of adjustment is used to determine the parameters. Contents of C1 work report. The main contents include: SY/T10019-1998 Appendix C (suggested appendix) Preparation of DXGPS positioning measurement work report. Brief map of the business area and description of the geographical location of the block: a
Reference station parameters and mobile station positioning system antenna location map: Operating personnel;
Performance, indicators and equipment list of positioning equipment used: Positioning operation quality analysis and time analysis: Positioning system calibration method, calibration value and system working stability analysis: f)
Attachment (table) and its description;
Other relevant information:
Report writing requirements are as follows:
The operation report must be accurate in text, data, clear, clean and neat in printing; a
The report is written by the person in charge of the operation and reviewed by the technical person in charge. bdy, dz;
c) Unit conversion: k.
B23 parameter coordinate conversion
3 parameter coordinate conversion is a common method for converting between various coordinate systems in a local area. It is not suitable to use the 3 parameter coordinate conversion method in a larger area. At present, some regions and departments have published or used some 3 parameters for conversion between coordinate systems, which can be adopted as appropriate. To obtain the 3-parameter transformation in a local area, at least 2 known points with accurate coordinates of two coordinate systems are evenly distributed in the area. The meaning of each parameter in the transformation is as follows: Coordinate translation: △x, Ay, Az. The method of multiplication of adjustment is used to determine the parameters. Contents of C1 work report. The main contents include: SY/T10019-1998 Appendix C (suggested appendix) Preparation of DXGPS positioning measurement work report. Brief map of the business area and description of the geographical location of the block: a
Reference station parameters and mobile station positioning system antenna location map: Operating personnel;
Performance, indicators and equipment list of positioning equipment used: Positioning operation quality analysis and time analysis: Positioning system calibration method, calibration value and system working stability analysis: f)
Attachment (table) and its description;
Other relevant information:
Report writing requirements are as follows:
The operation report must be accurate in text, data, clear, clean and neat in printing; a
The report is written by the person in charge of the operation and reviewed by the technical person in charge. bdy, dz;
c) Unit conversion: k.
B23 parameter coordinate conversion
3 parameter coordinate conversion is a common method for converting between various coordinate systems in a local area. It is not suitable to use the 3 parameter coordinate conversion method in a larger area. At present, some regions and departments have published or used some 3 parameters for conversion between coordinate systems, which can be adopted as appropriate. To obtain the 3-parameter transformation in a local area, at least 2 known points with accurate coordinates of two coordinate systems are evenly distributed in the area. The meaning of each parameter in the transformation is as follows: Coordinate translation: △x, Ay, Az. The method of multiplication of adjustment is used to determine the parameters. Contents of C1 work report. The main contents include: SY/T10019-1998 Appendix C (suggested appendix) Preparation of DXGPS positioning measurement work report. Brief map of the business area and description of the geographical location of the block: a
Reference station parameters and mobile station positioning system antenna location map: Operating personnel;
Performance, indicators and equipment list of positioning equipment used: Positioning operation quality analysis and time analysis: Positioning system calibration method, calibration value and system working stability analysis: f)
Attachment (table) and its description;
Other relevant information:
Report writing requirements are as follows:
The operation report must be accurate in text, data, clear, clean and neat in printing; a
The report is written by the person in charge of the operation and reviewed by the technical person in charge. b
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