CN103852057A - Astro-observation-based isolated small reef magnetic declination measurement method - Google Patents
Astro-observation-based isolated small reef magnetic declination measurement method Download PDFInfo
- Publication number
- CN103852057A CN103852057A CN201410053567.5A CN201410053567A CN103852057A CN 103852057 A CN103852057 A CN 103852057A CN 201410053567 A CN201410053567 A CN 201410053567A CN 103852057 A CN103852057 A CN 103852057A
- Authority
- CN
- China
- Prior art keywords
- magnetic
- theodolite
- observation
- astronomical
- astro
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C1/00—Measuring angles
- G01C1/02—Theodolites
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/40—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for measuring magnetic field characteristics of the earth
Landscapes
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Radar, Positioning & Navigation (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
The invention relates to an astro-observation-based isolated small reef magnetic declination measurement method. The method has the main technical characteristics of comprising the steps of burying a non-magnetic survey mark at a main measurement point of an isolated small reef, erecting a magnetic theodolite at the main measurement point to form an astro-observation base line, and determining the space coordinates of the main measurement point by a static observational method; aiming at the spatial celestial body by the magnetic theodolite and accurately recording the observation time, and calculating the geodetic azimuth alpha of the astro-observation base line and the magnetic azimuth alpha m of the astro-observation base line by the astronomical calendar; calculating the magnetic declination D at the main measurement point. According to the method, the non-magnetic survey marker only needs to be buried at the main measurement point of the isolated small reef, and the astro-observation base line is formed by the main measurement point and the spatial celestial body, so that the work of selecting and burying an auxiliary measurement point is omitted; the astro-observation-based isolated small reef magnetic declination measurement method has the characteristics of being high in measurement accuracy, simple and convenient in measurement method, easy to implement and the like, and effectively solves the problem of isolated small reef magnetic declination measurement.
Description
Technical field
The invention belongs to Ocean Surveying technical field, especially a kind of isolated island reef magnetic declination measuring method based on astronomical sight.
Background technology
In sea island reef magnetic declination is measured, there are a lot of isolated little islands and reefs, the available land surface of these little islands and reefs only has several square metres to tens square metres, and its straight line intervisibility is apart from 50 meters of less thaies.Traditional GNSS method and the ultra-short baseline magnetic declination measuring method based on gyro-theodolite need to be laid main measuring point and secondary measuring point conventionally, form observation base, the terrestrial coordinate of obtaining respectively main measuring point and secondary measuring point by long GNSS static observation, inverse is obtained the geodetic azimuth of observation base accordingly.State Seismological Bureau's " Chinese magnetic map field inspection specification and detailed rules for the implementation 2003 thereof " requires: the observation base of land fluidly magnetic measurement should be greater than 200 meters, but, carry out magnetic declination measurement on isolated little islands and reefs time, existing measuring method is difficult to meet measures requirement, cannot realize measurement function accurately.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of isolated island reef magnetic declination measuring method based on astronomical sight is provided, the magnetic declination that solves isolated sea island reef is measured problem.
The present invention solves existing technical matters and takes following technical scheme to realize:
Based on an isolated island reef magnetic declination measuring method for astronomical sight, comprise the following steps:
Step 1, on the main measuring point of isolated little islands and reefs, bury underground without magnetic measurement mark, and on main measuring point, set up magnetic theodolite and carry out centering leveling, thereby main measuring point and space celestial body are formed to astronomical sight baseline jointly, determine the volume coordinate of main measuring point by static observation method;
Step 2, adopts magnetic theodolite to aim at space celestial body accurate recording observation moment, calculates the geodetic azimuth α of astronomical sight baseline and the magnetic azimuth α of astronomical sight baseline by astronomical calendar
m;
Step 3, calculate the declination D on main measuring point according to following formula:
D＝α-α
m
Thereby realize the measurement of isolated island reef magnetic declination.
And the concrete methods of realizing of described step 2 comprises the following steps:
(1) magnetic theodolite telescope rotatably, aims at the sun or arctic magnitude space celestial body, read level circle reading A and observe accurately moment t;
(2) magnetic theodolite alidade rotationally, determines the position of magnetic meridian plate, read level circle reading B according to the instruction of null detector;
(3) adopt following formula to calculate the magnetic azimuth α of astronomical sight baseline
m:
α
m＝B-A±90°
Wherein, relation between base area magnetic theodolite sighting plane and magnetic meridian plate, determines ± 90 ° of angles;
(4), according to astronomical year book and observation moment t, calculate the geodetic azimuth α of astronomical sight baseline.
And the method for described step 1 centering leveling adopts gyro-theodolite and magnetic theodolite to carry out mutually the method for taking aim at being realized.
And described space celestial body is Polaris or the sun.
Advantage of the present invention and good effect are:
1, the present invention is using the sun or arctic magnitude space celestial body as observation monument, in other words using the line between observation station and space celestial body as observation base, astronomical sight is applied to isolated island reef magnetic declination dexterously measures, realize the theoretical combination of measuring with magnetic declination of uranology, provide practicable technological approaches for carrying out a magnetic declination measurement difficult problem on the isolated little islands and reefs in sea.
2, the present invention only need bury underground without magnetic measurement mark on the main measuring point of isolated little islands and reefs, jointly form astronomical sight baseline with main measuring point and space celestial body, omit surveying choosing and layinging of markstone work of secondary measuring point, have that measuring accuracy is high, measuring method is easy, be easy to the features such as realization, effectively solved the difficult problem that isolated island reef magnetic declination is measured.
Brief description of the drawings
Fig. 1 is measuring principle figure of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the present invention is further described.
Based on an isolated island reef magnetic declination measuring method for astronomical sight, comprise the following steps:
Step 1, on the main measuring point of isolated little islands and reefs, bury underground without magnetic measurement mark, and on main measuring point, set up magnetic theodolite and carry out centering leveling, thereby main measuring point and space celestial body are formed to astronomical sight baseline jointly, determine the volume coordinate of main measuring point by static observation method.
This step need to be set up main measuring point at isolated island reef, as shown in Figure 1, main measuring point and space celestial body is formed to astronomical sight baseline jointly, replaces traditional land observation base, and space celestial body can use the sun or Polaris as space celestial body.In the time that flattening, centering can use gyro-theodolite and magnetic theodolite to carry out mutually, to taking aim at, can obviously reducing the error of centralization.
Above-mentioned magnetic theodolite and gyro-theodolite adopt existing instrument.Wherein, magnetic theodolite, as the equipment of measuring magnetic declination and magnetic dip measurement, mainly comprises following three parts: (1) optical theodolite: the optical theodolite that adopts non-magnetic material to manufacture, for reading of base direction aiming and magnetic azimuth; (2) fluxgate magnetometer sensor: install additional on optical telescope, require it axially to hope that with optics glasses are axially strictly parallel, for determining the position of magnetic meridian plate; (3) null detector: be connected the output voltage for detection of fluxgate magnetic core with fluxgate magnetic core: in the time that the output voltage values on null detector is zero, mark fluxgate magnetic core axis is perpendicular to terrestrial magnetic field direction, the accordingly position of magnetic direction definitely.The GT3H type gyro-theodolite of ship heavy industry 707 Research Institute during gyro-theodolite can adopt, this gyro-theodolite be a kind of precise orientation equipment, meet ultra-short baseline magnetic declination measure needs.
Step 2, adopts magnetic theodolite to aim at space celestial body accurate recording observation moment, by the geodetic azimuth between astronomical calendar computer memory celestial body and main measuring point.
Carrying out in observation process, observe the moment there is same importance with horizontal dial reading, the vertical circle reading of magnetic theodolite, therefore, need the moment of accurate recording observation.
The detailed process of this step is as follows:
(1) magnetic theodolite telescope rotatably, aims at the sun or arctic magnitude space celestial body, read level circle reading A and observe accurately moment t;
(2) magnetic theodolite alidade rotationally, determines the position of magnetic meridian plate, read level circle reading B according to the instruction of null detector;
(3) adopt following formula to calculate the magnetic azimuth α of astronomical sight baseline
m:
α
m＝B-A±90°
Wherein, relation between base area magnetic theodolite sighting plane and magnetic meridian plate, determines ± 90 ° of angles;
(4), according to astronomical year book and observation moment t, calculate the geodetic azimuth α of astronomical sight baseline (line between main measuring point and the sun or arctic magnitude celestial body).
Step 3, calculate the declination D on main measuring point according to following formula:
D＝α-α
m
Above-mentioned declination D is isolated island reef magnetic declination.
Can realize the measurement function of isolated island reef magnetic declination by above step.
It is emphasized that; embodiment of the present invention is illustrative; instead of determinate; therefore the present invention includes and be not limited to the embodiment described in embodiment; every other embodiments that drawn by those skilled in the art's technical scheme according to the present invention, belong to the scope of protection of the invention equally.
Claims (4)
1. the isolated island reef magnetic declination measuring method based on astronomical sight, is characterized in that comprising the following steps:
Step 1, on the main measuring point of isolated little islands and reefs, bury underground without magnetic measurement mark, and on main measuring point, set up magnetic theodolite and carry out centering leveling, thereby main measuring point and space celestial body are formed to astronomical sight baseline jointly, determine the volume coordinate of main measuring point by static observation method;
Step 2, adopts magnetic theodolite to aim at space celestial body accurate recording observation moment, calculates the geodetic azimuth α of astronomical sight baseline and the magnetic azimuth α of astronomical sight baseline by astronomical calendar
m;
Step 3, calculate the declination D on main measuring point according to following formula:
D＝α-α
m。
2. a kind of isolated island reef magnetic declination measuring method based on astronomical sight according to claim 1, is characterized in that: the concrete methods of realizing of described step 2 comprises the following steps:
(1) magnetic theodolite telescope rotatably, aims at the sun or arctic magnitude space celestial body, read level circle reading A and observe accurately moment t;
(2) magnetic theodolite alidade rotationally, determines the position of magnetic meridian plate, read level circle reading B according to the instruction of null detector;
(3) adopt following formula to calculate the magnetic azimuth α of astronomical sight baseline
m:
α
m＝B-A±90°
Wherein, relation between base area magnetic theodolite sighting plane and magnetic meridian plate, determines ± 90 ° of angles;
(4), according to astronomical year book and observation moment t, calculate the geodetic azimuth α of astronomical sight baseline.
3. a kind of isolated island reef magnetic declination measuring method based on astronomical sight according to claim 1, is characterized in that: the method for described step 1 centering leveling adopts gyro-theodolite and magnetic theodolite to carry out mutually the method for taking aim at being realized.
4. according to a kind of isolated island reef magnetic declination measuring method based on astronomical sight described in claims 1 to 3 any one, it is characterized in that: described space celestial body is Polaris or the sun.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410053567.5A CN103852057A (en) | 2014-02-18 | 2014-02-18 | Astro-observation-based isolated small reef magnetic declination measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410053567.5A CN103852057A (en) | 2014-02-18 | 2014-02-18 | Astro-observation-based isolated small reef magnetic declination measurement method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103852057A true CN103852057A (en) | 2014-06-11 |
Family
ID=50860002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410053567.5A Pending CN103852057A (en) | 2014-02-18 | 2014-02-18 | Astro-observation-based isolated small reef magnetic declination measurement method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103852057A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109029405A (en) * | 2018-08-06 | 2018-12-18 | 云南省建设投资控股集团有限公司 | A kind of construction survey master reference point coordinate system review method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102692218A (en) * | 2012-06-27 | 2012-09-26 | 胡吉庆 | Total station orientated by use of sun |
-
2014
- 2014-02-18 CN CN201410053567.5A patent/CN103852057A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102692218A (en) * | 2012-06-27 | 2012-09-26 | 胡吉庆 | Total station orientated by use of sun |
Non-Patent Citations (3)
| Title |
|---|
| 任来平等: "海岛礁磁偏角测量原理与方法", 《海洋测绘》 * |
| 张维全等: "地磁偏角及其简便确定方法的探讨", 《辽宁气象》 * |
| 洪绍明等: "常用定向方法综述及其比较", 《勘察科学技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109029405A (en) * | 2018-08-06 | 2018-12-18 | 云南省建设投资控股集团有限公司 | A kind of construction survey master reference point coordinate system review method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102435140B (en) | Method for constructing geographic coordinate system with laser tracker | |
| CN108375801B (en) | Ground Nuclear Magnetic Resonance movable type three-component magnetic surveying device and magnetic survey method | |
| CN105388494B (en) | A kind of laser ranging localization method applied to RTK receiver | |
| CN106092106B (en) | Eulerian angles scaling method between star sensor and Magnetic Sensor | |
| CN105203103B (en) | The method for real-time measurement of the relatively geographical position relation of ground spacecraft | |
| CN108253946A (en) | Multi-functional vertical measurement connection survey integrated three-dimensional coordinate transfer device and method | |
| CN103852058A (en) | Ultrashort base line magnetic declination measuring method based on gyro theodolite | |
| CN102419457B (en) | Method for determining deep rock structural surface attitude by utilizing television image of single vertical drilling hole | |
| Poulose et al. | Indoor localization with smartphones: Magnetometer calibration | |
| CN101285684B (en) | Gyro positioning measuring method | |
| CN104635200B (en) | Measuring method for calibration of north direction of phased array antenna based on gyro orientation | |
| CN105890579A (en) | Rapid underground pipeline element measuring instrument and technical method | |
| CN103884319B (en) | Exempt from tower base sectional drawing measuring method and the equipment of total powerstation | |
| CN109099905A (en) | A kind of list celestial body astrofix quickly, direct computing method | |
| CN106772635B (en) | A kind of buried cable 3 D locating device and localization method to be crossed based on scanning | |
| CN103759705B (en) | Three-point closed laying measurement method for composite water level | |
| CN102865853B (en) | Rapid high-precision guiding method based on oblique datum photoelectric tracking and measuring equipment | |
| CN103852057A (en) | Astro-observation-based isolated small reef magnetic declination measurement method | |
| CN106441228B (en) | A kind of measurement method at antenna attitude angle | |
| CN204988280U (en) | Arbitrary transmission line engineering in simple and convenient high -efficient plane surveys and establishes device | |
| CN107664510B (en) | Device for detecting angle measurement precision of satellite-borne two-dimensional pointing mechanism and implementation method | |
| CN106197477A (en) | A kind of indoor positioning course error bearing calibration | |
| CN108168511A (en) | Composite level parametric measurement method | |
| CN2921782Y (en) | Field astronomical orientation system | |
| CN109579775A (en) | Measure formation strike, the method for tendency in magnetic rock mass |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140611 |