CN111735435A - Submarine topographic height resolution stereo gravity model based on Jason-1 satellite data - Google Patents
Submarine topographic height resolution stereo gravity model based on Jason-1 satellite data Download PDFInfo
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- CN111735435A CN111735435A CN201910971510.6A CN201910971510A CN111735435A CN 111735435 A CN111735435 A CN 111735435A CN 201910971510 A CN201910971510 A CN 201910971510A CN 111735435 A CN111735435 A CN 111735435A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C13/00—Surveying specially adapted to open water, e.g. sea, lake, river or canal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/89—Sonar systems specially adapted for specific applications for mapping or imaging
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/14—Receivers specially adapted for specific applications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V7/00—Measuring gravitational fields or waves; Gravimetric prospecting or detecting
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- Computer Networks & Wireless Communication (AREA)
- Hydrology & Water Resources (AREA)
- Acoustics & Sound (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a submarine topographic height resolution stereo gravity model based on Jason-1 satellite data, which comprises the following steps: the method comprises the steps of conducting height measurement research on a target sea area based on a Jason-1 satellite, conducting on-site survey on a target submarine topography based on a multi-beam echo measurement system, drawing the target submarine topography according to survey data, calculating gravity anomaly based on satellite height measurement data, calculating gravity vertical gradient based on the satellite height measurement data, calculating gravity anomaly and vertical gravity gradient anomaly by using a model based on other measured submarine areas, conducting coincidence comparison on the height measurement data of the target sea area and the submarine topography of the target sea area, calculating the relative relation between submarine topography distribution and gravity distribution, and deriving a three-dimensional gravity field model based on the relation between the gravity distribution and the submarine topography of the target sea area, wherein the change trend of the submarine topography is conveniently extended through the change of the gravity field, and otherwise, the three-dimensional gravity field model can be derived through actually measuring the submarine topography.
Description
Technical Field
The invention belongs to the technical field of submarine surveying and mapping, and particularly relates to a submarine topographic height resolution stereo gravity model based on Jason-1 satellite data.
Background
One of the types of ocean mapping is mapping work mainly for measuring the fluctuation of the sea bottom, the sea bottom topography measurement usually uses an echo depth finder and a side scan sonar which are installed on a ship to simultaneously measure the water depth and the size and the position of an underwater ground object, and can also use methods such as a multi-beam echo depth measurement system, a sea bottom photogrammetry, an airborne laser depth measurement and an ocean remote sensing depth measurement, and the like, and according to the distance from the coast, the positioning of each measuring point can use methods such as optical positioning, radio positioning, underwater acoustic positioning, satellite positioning, combined positioning and the like, when the submarine topography measurement is carried out by using a submarine, inertial positioning or positioning by using a submarine control point can be adopted, wherein the multi-beam echo depth measurement system is matched with the combined satellite positioning system, the method for processing and drawing a sea bottom three-dimensional graph in real time by a computer is developed fastest, and the sea bottom topography graph is required to be uniformly specified in, and is consistent with land topographic maps in the same region, so as to be beneficial to the connection and use of sea and land maps.
The existing stereo gravitation technology has the following problems: sea levels are not distributed in a plane, namely the sea levels of some regions are convex, the sea levels of some regions are concave, the uneven elimination environmental factors of the sea levels are mostly caused by a gravitational field, the height of the sea levels is related to the accumulation of substances formed by huge mountains or sea ditches nearby, the accumulation of the substances can bend the surface gravitation of the sea levels, and further the uneven phenomenon of the sea levels is caused, the change of the submarine topography can be known by researching the large-scale concave-convex change of the sea levels, the gravitational field at a target sea area can be deduced, at present, the change of the submarine topography has no related depth research on the change of the gravitational field, the field is in a relative blank state, and the problem that the gravitational field is decoded by the change of the submarine topography is urgently needed.
Disclosure of Invention
The invention aims to provide a submarine terrain height resolution stereo gravity model based on Jason-1 satellite data, which aims to solve the problem that the sea level proposed in the background technology is not plane distribution, that is, the sea surface in some regions is convex, the sea surface in some regions is concave, the concave-convex rejection environmental factors of the sea surface are mostly caused by gravitational field, the height of the sea surface is related to the accumulation of substances formed by huge mountains or sea ditches nearby, the accumulation of the substances can make the surface gravitation bend, thereby causing the uneven sea surface, obtaining the change of the submarine topography by researching the large-scale concave-convex change of the sea surface, can deduce the gravitational field at the target sea area, has no relevant depth research on the change of the submarine topography to the change of the gravitational field at present, the field is in a relative blank state, and the problem of interpreting the gravitational field through submarine topography change is urgently needed.
In order to achieve the purpose, the invention provides the following technical scheme:
a submarine terrain height resolution stereo gravity model based on Jason-1 satellite data comprises the following steps: the method comprises the steps of conducting height measurement research on a target sea area based on a Jason-1 satellite, conducting on-site survey on a target submarine topography based on a multi-beam echo measurement system, drawing the target submarine topography according to survey data, calculating gravity anomaly based on satellite height measurement data, calculating gravity vertical gradient based on the satellite height measurement data, calculating gravity anomaly and vertical gravity gradient anomaly by using a model based on other measured sea areas, conducting coincidence comparison on the height measurement data of the target sea area and the submarine topography of the target sea area, calculating the relative relation between submarine topography distribution and gravity distribution, and comparing the gravity distribution and the submarine topography of other measured sea areas based on the relation between the gravity distribution and the submarine topography of the target sea area.
Preferably, the vertical height from the satellite to the sea level is measured, and then the vertical heights from the sea level of different terrains in the target sea area to the satellite are compared, and the vertical height from the satellite to the reference ellipsoid is measured, and then the water level heights at the sea ditch, the sea level plain and the sea level mountain range in the target sea area are compared.
Preferably, the complex sea area with the sea ditches, the sea-bottom plains and the sea-bottom mountains is selected for on-site ship measurement, the target sea bottom is accurately measured in three dimensions by adopting inertial positioning or positioning by using a sea-bottom control point, a multi-beam echo measurement system and the combined satellite positioning system, and the measured data is made into a map for display.
Preferably, the time and position information is used for calculating the derivative of the satellite height measurement along the profile of the satellite height measurement track according to the first order difference item of the height measurement observation value, the vertical deviation is calculated by combining the ascending arc differential equation and the descending arc differential equation at the intersection point, and the vertical gravity gradient anomaly is analyzed based on the vertical deviation, the geohorizon, the gravity anomaly and the EGM2008 model.
Preferably, the other measured submarine topography data and the measured gravitational field are subjected to coincidence comparison, the position where the gravitational field has obvious change in the coincidence comparison is marked with the sea area topography change, and the change trends of the gravitational field at the sea ditches, the sea bottom plains and the sea bottom mountains in the measured sea area are drawn after marking.
Preferably, the target submarine topography data is superposed and compared with the measured gravitational field, the position where the gravitational field has obvious change in the superposed comparison is marked with the change of the submarine topography, the change trends of the gravitational field at the positions of a submarine ditch, a submarine plain and a submarine mountain range in the measured submarine are drawn after marking, and the submarine topography for comparison is placed below the gravitational change map by using a base map in the drawing process.
Compared with the prior art, the invention provides a submarine topographic height resolution stereo gravity model based on Jason-1 satellite data, which has the following beneficial effects:
the variation of the gravitational field of the submarine topography can be calculated by using Jason-1 satellite data, and then the actual topography variation of the sea area is measured by the satellite to compare the relationship between the gravitational field and the submarine topography, so that the variation trend of the submarine topography can be conveniently extended by the variation of the gravitational field variation, and otherwise, the three-dimensional gravitational field model can be deduced by actually measuring the submarine topography.
Detailed Description
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme of a submarine topography high-resolution stereo gravity model based on Jason-1 satellite data, which comprises the following steps:
a three-dimensional gravity model of submarine topographic height resolution based on Jason-1 satellite data comprises the steps of conducting height measurement research on a target sea area based on a Jason-1 satellite, measuring the vertical height from the satellite to the sea level, comparing the vertical heights from the sea level of different terrains in the target sea area to the satellite, measuring the vertical height from the satellite to a reference ellipsoid, and comparing the water level heights of a ditch, a submarine plain and a submarine mountain range in the target sea area.
A submarine topography high-resolution stereo gravitation model based on Jason-1 satellite data comprises the steps of surveying a target submarine topography on the spot based on a multi-beam echo measurement system, drawing the target submarine topography according to survey data, selecting a complex sea area with a sea ditch, a submarine plain and a submarine mountain range to carry out ship survey on the spot, carrying out accurate three-dimensional measurement on the target submarine by adopting inertial positioning or positioning by using a submarine control point, and carrying out map display on the measured data by using the multi-beam echo measurement system and the combined satellite positioning system.
A three-dimensional gravity model for resolving submarine terrain height based on Jason-1 satellite data comprises the steps of calculating gravity anomaly based on satellite height measurement data, calculating gravity vertical gradient based on the satellite height measurement data, calculating the derivative of a satellite height measurement along a section plane by using time and position information and a first order difference item of a height measurement observation value, calculating vertical deviation by combining a rising arc differential equation and a falling arc differential equation at a cross point, and analyzing the vertical gravity gradient anomaly based on the vertical deviation, a geodetic plane, the gravity anomaly and an EGM2008 model.
A three-dimensional gravity model based on Jason-1 satellite data for submarine topographic height resolution comprises the steps of calculating gravity anomaly and vertical gravity gradient anomaly by using the model based on other measured sea areas for analysis, performing coincidence comparison on other measured submarine topographic data and a measured gravity field, marking positions where the gravity field is obviously changed in the coincidence comparison with the topographic change of the sea area, and drawing the change trends of the gravity fields at a ditch, a submarine plain and a submarine mountain range in the measured sea area after marking.
A three-dimensional gravity model based on Jason-1 satellite data for resolving submarine terrain height comprises the steps of comparing the height measurement data of a target sea area with submarine topography of the target sea area, calculating the relative relation between submarine topography distribution and gravity distribution, comparing the target submarine topography data with the measured gravity field in a superposition manner, marking the gravity field with the change of the submarine topography, drawing the change trends of the gravity fields at a submarine ditch, a submarine plain and a submarine mountain range in the measured sea area after marking, and placing the submarine topography for comparison below the gravity change map by using a base map in the drawing process.
A three-dimensional gravity model for submarine terrain height resolution based on Jason-1 satellite data comprises gravity distribution and submarine terrain relation based on a target sea area, and further compares the gravity distribution and submarine terrain relation of other measured sea areas.
The invention has the following use processes: measuring the vertical height from the satellite to the sea level, comparing the vertical heights from the sea level of different terrains in a target sea area to the satellite, measuring the vertical height from the satellite to a reference ellipsoid, comparing the water level heights at the sea ditch, the sea plain and the sea mountain in the target sea area, calculating the derivative of the profile of the satellite height measurement along the track by using the first differential term of the height measurement observation value through time and position information after the height measurement research on the target sea area based on the Jason-1 satellite is finished, calculating the vertical deviation by combining a rising arc differential equation and a falling arc differential equation at the intersection point, simultaneously calculating the gravity field distribution of the target sea area by analyzing the vertical gradient abnormality based on the vertical deviation, the ground level, the gravity abnormality and an EGM2008 model, selecting the complex sea areas with the sea ditch, the sea plain and the sea mountain to carry out on-site ship measurement, and positioning by adopting inertial positioning or utilizing a sea floor control point, the multi-beam echo measuring system and the combined satellite positioning system are used for carrying out accurate three-dimensional measurement on the target seabed, measured data are made into a map for displaying, and when the target seabed terrain is coincided and compared with the gravitational field of the target sea area, the change of the gravitational field can be interpreted according to the change trend of the terrain, so that the three-dimensional gravitational model is deduced according to the seabed terrain.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A submarine terrain height resolution stereo gravity model based on Jason-1 satellite data is characterized by comprising the following steps:
step 1: carrying out height measurement research on a target sea area based on a Jason-1 satellite;
step 2: carrying out on-site survey on the target submarine topography based on a multi-beam echo measuring system, and drawing the target submarine topography according to survey data;
and step 3: calculating gravity anomaly based on satellite altimetry data, and calculating gravity vertical gradient based on satellite altimetry data;
and 4, step 4: calculating gravity anomaly and vertical gravity gradient anomaly by using a model based on other measured sea areas for analysis;
and 5: the height measurement data of the target sea area and the submarine topography of the target sea area are coincided and compared, and the relative relation between the submarine topography distribution and the gravitation distribution is calculated;
step 6: and comparing the gravity distribution and the submarine topography relation of other measured sea areas based on the gravity distribution and the submarine topography relation of the target sea area.
2. The model of claim 1, wherein the Jason-1 satellite data-based submarine topographic height resolution stereo gravity study on the target sea area comprises the following steps:
step 11: measuring the vertical height from the satellite to the sea level, and comparing the vertical heights from the sea level of different terrains in the target sea area to the satellite;
step 12: and measuring the vertical height from the satellite to the reference ellipsoid, and comparing the water level heights of the sea ditch, the sea bed plain and the sea bed mountain range in the target sea area.
3. The submarine topography high-resolution stereo gravity model based on Jason-1 satellite data according to claim 1, wherein the target submarine topography is surveyed in the field based on the multi-beam echography system, and the mapping of the target submarine topography according to the survey data comprises the following steps:
step 21: selecting a complex sea area with a sea ditch, a sea-bottom plain and a sea-bottom mountain range to carry out on-site ship measurement;
step 22: and (3) carrying out accurate three-dimensional measurement on the target seabed by adopting inertial positioning or positioning by using a seabed control point through a multi-beam echo measurement system and the combined satellite positioning system, and making the measurement data into a map for displaying.
4. The model of claim 1, wherein the gravity anomaly is calculated based on satellite elevation data, and the calculation of the gravity vertical gradient based on satellite elevation data comprises the following steps:
step 31: calculating the derivative of the satellite height measurement along track section by using the time and position information and the primary difference item of the height measurement observation value, and calculating the deviation of the vertical line by combining the ascending arc differential equation and the descending arc differential equation at the intersection point;
step 32: and analyzing the vertical gravity gradient abnormality based on the vertical deviation, the geodetic plane, the gravity abnormality and the EGM2008 model.
5. The model of claim 1, wherein the model for computing gravity anomaly and vertical gravity gradient anomaly for analysis based on other measured sea regions comprises the following steps:
step 41: coincidence comparison is carried out on other measured submarine topography data and the measured gravitational field;
step 42: marking the position where the gravity field has obvious change in coincidence comparison with the change of the terrain of the sea area, and drawing the change trends of the gravity field at the positions of the sea ditches, the sea bottom plains and the sea bottom mountains in the measured sea area after marking.
6. The model of claim 1, comprising the following steps:
step 41: coincidence comparison is carried out on the target seabed terrain data and the measured gravitational field;
step 42: marking the obvious change position of the gravitational field in the coincidence comparison with the change of the terrain of the sea area, drawing the change trends of the gravitational field at the positions of the sea ditches, the sea bottom plains and the sea bottom mountains in the measured sea area after marking, and placing the bottom map for the sea bottom terrain for comparison below the gravitational change map in the drawing process.
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| US5602731A (en) * | 1986-12-23 | 1997-02-11 | Petroscan Ab | Method for mapping sea level undulations with applications to mineral and hydrocarbon prospecting |
| CN102169178A (en) * | 2010-12-21 | 2011-08-31 | 中国测绘科学研究院 | Method for determining sea surface topographic structure based on barodynamics |
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Application publication date: 20201002 |