CN113360524B - Sea ice thickness data processing system on ice area airlines - Google Patents
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Abstract
The invention provides a sea ice thickness data processing system on an ice area navigation line, which comprises the following steps: the ice database and track database building module: the method comprises the steps of acquiring initial track point data and ice data nearby the initial track point, fitting the initial track point to obtain a virtual track point, and integrating the initial track point and the virtual track point; the track point ice data extraction module is used for solving the ice thickness value of the total track point according to the total track point and the ice data to obtain an assigned track point; and a data analysis and output module: and the method is used for obtaining the ice thickness distribution ratio in the fitting track, the duty ratio of the ice area course and the open water area course in the total course of the fitting track according to the assigned track points. The invention provides a foundation for ice condition application under a real air route. The weight of the ice thickness of the fixed route and the weight of the route length of the ice area and the route length of the open water area accounting for the total route mileage can be extracted.
Description
Technical Field
The invention relates to the technical field of ice thickness data processing systems, in particular to a sea ice thickness data processing system on an ice area airliner.
Background
In the aspect of research of sea ice data, the range, density and thickness of North sea ice have been developed in depth at home and abroad. Such as the patent: CN 108519058A estimates the ice thickness by remote sensing satellite technology; the sea ice thickness was estimated based on the sea ice thickness distribution estimation method of least squares adjustment as in CN 111125934A. These are patents for measuring or evaluating ice thickness. For polar airlines, sea ice data on fixed airlines has great reference value, and no learner has studied sea ice data extraction and analysis for a specific airline.
Disclosure of Invention
According to the technical problem, a sea ice thickness data processing system on an ice area aerial line is provided.
The invention adopts the following technical means:
a sea ice thickness data processing system on an ice area airliner, comprising:
the ice database and track database building module: the method comprises the steps of obtaining initial track point data from a ship automatic identification system database, and obtaining ice data near the initial track point to obtain an ice data database; fitting the initial track points to obtain a virtual track point database; the method comprises the steps of integrating the initial track points and the virtual track points to obtain a total track point database and a fitting track;
track point ice data extraction module: the method comprises the steps of obtaining an average value of ice thickness in ice data near a total track point according to the total track point database and the ice data database, and giving the average value to the total track point to obtain an assigned track point; because there is no ice near some of the total track points, the number of assigned track points is less than or equal to the total track points.
And a data analysis and output module: and the method is used for obtaining the ice thickness distribution ratio, the duty ratio of the ice area course and the open water area course in the total course of the fitted track according to the assigned track points, and outputting the ice thickness distribution ratio, the duty ratio of the ice area course and the open water area course in the total course of the fitted track.
Further, the ice data comprises longitude and latitude values and ice thickness values corresponding to the longitude and latitude values.
Further, the ice data database is obtained as follows:
the ice data database is obtained by delineating ice data near the initial track points according to longitude and latitude coordinates of the i initial track points:
wherein: ALa (i) is the latitude value of the initial track point, ALo (i) is the longitude value of the initial track point, L (i) is the ice thickness data set near the initial track point, ILo (i) is the ice thickness data longitude value solution set near the initial track point, ILa (i) is the ice thickness data latitude value solution set near the initial track point, O i Longitude value of ice thickness data near the initial track point, A i Is the latitude value of the ice thickness data near the initial track data point.
Further, the virtual track point database is obtained as follows:
fitting the initial track points by using an interpolation method to obtain the virtual track points;
performing linear interpolation fitting on the initial track points, projecting line segments formed by every two adjacent initial track points in the longitudinal direction, adding one fitting track point on a projection line at intervals x,
the formula is as follows:
BLo(n)＝x(m-1)
m＝(ALo(i+1)-ALo(i))/x
wherein: BLo (n) represents a virtual track point longitude value, and BLa (n) represents a virtual track point latitude value; n is the number of virtual track points;
the total track points in the total track point database are j=n+i, and the longitude and latitude values are as follows: (CLa (j), CLo (j)).
Further, the ice data near the total track point is obtained as follows:
each total track point in the total track point database is sequentially subjected to region matching with longitude and latitude values of the ice data database to obtain ice data near each total track point, wherein a specific formula is shown as follows:
wherein: CLa (j) is the longitude value of the total track point, CLo (j) is the latitude value of the total track point, NPa (t) is the latitude value of the ice data point near the total track point, NPo (t) is the longitude value of the ice data point near the total track point, NPt (t) is the thickness value of the ice data point near the total track point, and variable t is the data of the ice data point near the total track point.
Further, according to the total track point database and the ice data database, the average value of the ice thickness in the ice data near the total track point is calculated as follows:
At(j)＝∑NPt(t)/t
where At (j) represents the ice thickness value of the total track point.
Further, the duty ratio of the ice range and the open water range in the total range is calculated as follows:
performing distance evaluation on two adjacent total track points, and finally summing to obtain a total course;
performing distance evaluation on two adjacent assigned track points, and finally summing to obtain an ice range;
subtracting the ice area range from the total range to obtain an open water range;
the calculation mode of the ice area course and the open water area course in the total course is as follows:
IL＝∑D j
ε 2 ＝1-ε 1
wherein: d (D) j Representing the length between two adjacent assigned track points, IL representing the length of the ice range, T representing the total range length, ε 1 And epsilon 2 Representing the duty cycle of the range of the ice area and the open area in the total range respectively.
Further, the ice thickness distribution ratio is calculated as follows:
dividing and sorting ice thickness data of assigned track points into s ranges by po (s-1) ～po s For boundary, find out the number qo of assigned track points in different ranges s And the ratio omega of the number W of all assigned track points s Omega is used s As weights for different ranges of ice thickness;
the number of ice data points in different ice thickness ranges is calculated as follows:
the total number of assigned track points is as follows:
W＝∑q s
the ice thickness distribution ratio was determined as follows:
ω s ＝qo s /W。
the method comprises the steps of obtaining a virtual track point database based on initial track point data and an ice data database, and combining the virtual track point database and the ice data database to obtain a total track point; and averaging the ice thickness near the total track point, giving the value to the total track point to obtain an assigned track point, and then obtaining the ice thickness distribution ratio, the duty ratio of the ice range and the open water range in the total range of the fitted track by using the assigned track point.
Compared with the prior art, the invention has the following advantages:
for polar airlines, sea ice data on fixed airlines has great reference value, and sea ice data extraction and analysis of a specific airline are not researched by students. Based on sea ice data, the patent designs a sea ice data extraction system of a route, and the sea ice data is analyzed by using the system, so that a foundation is provided for ice condition application under a real route. The weight of the ice thickness of the fixed route and the weight of the route length of the ice area and the route length of the open water area accounting for the total route mileage can be extracted.
Based on the reasons, the method can be widely popularized in the fields of ice thickness data processing of the route in the ice area and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of initial track point fitting in an embodiment of the present invention.
FIG. 2 is a schematic diagram of ice data acquisition near a total track point in an embodiment of the invention.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be clear that, for convenience of description, the sizes of the respective parts shown in the drawings are not drawn in actual scale. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
As shown in fig. 1-2, a sea ice thickness data processing system on an ice area route includes:
the ice database and track database building module: the method comprises the steps of obtaining initial track point data from a ship automatic identification system database, and obtaining ice data near the initial track point to obtain an ice data database; the initial track point data can be acquired by a ship Automatic Identification System (AIS) database, and the ice data can be acquired by a network, for example, related information exists in an http:// www.cpom.ucl.ac.uk/csopr/security.html website; fitting the initial track points to obtain a virtual track point database; the method comprises the steps of integrating the initial track points and the virtual track points to obtain a total track point database and a fitting track;
track point ice data extraction module: the method comprises the steps of obtaining an average value of ice thickness in ice data near a total track point according to the total track point database and the ice data database, and giving the average value to the total track point to obtain an assigned track point; because there is no ice near some of the total track points, the number of assigned track points is less than or equal to the total track points.
And a data analysis and output module: and obtaining the ice thickness distribution ratio, the duty ratio of the ice area course and the open water area course in the total course of the fitted track according to the assigned track points, and outputting the ice thickness distribution ratio, the duty ratio of the ice area course and the open water area course in the total course of the fitted track.
Further, the ice data comprises longitude and latitude values and ice thickness values corresponding to the longitude and latitude values.
Further, the ice data database is obtained as follows:
the ice data database is obtained by delineating ice data near the initial track points according to longitude and latitude coordinates of the i initial track points:
wherein: ALa (i) is the latitude value of the initial track point, ALo (i) is the longitude value of the initial track point, L (i) is the ice thickness data set near the initial track point, ILo (i) is the ice thickness data longitude value solution set near the initial track point, ILo (i) is the ice thickness data latitude value solution set near the initial track point, O i Longitude value of ice thickness data near the initial track point, A i Is the latitude value of the ice thickness data near the initial track data point.
Further, the virtual track point database is obtained as follows:
fitting the initial track points by using an interpolation method to obtain the virtual track points;
performing linear interpolation fitting on the initial track points, projecting line segments formed by every two adjacent initial track points in the longitudinal direction, and adding one fitting track point on a projection line at intervals x, as shown in fig. 1;
the formula is as follows:
BLo(n)＝x(m-1)
m＝(ALo(i+1)-ALo(i))/x
wherein: BLo (n) represents a virtual track point longitude value, and BLa (n) represents a virtual track point latitude value; n is the number of virtual track points;
the total track points in the total track point database are j=n+i, and the longitude and latitude values are as follows: (CLa (j), CLo (j)).
Further, the ice data near the total track point is obtained as follows:
each total track point in the total track point database is sequentially subjected to region matching with longitude and latitude values of the ice data database to obtain ice data near each total track point, as shown in fig. 2, a specific formula is as follows:
wherein: CLa (j) is the longitude value of the total track point, CLo (j) is the latitude value of the total track point, NPa (t) is the latitude value of the ice data point near the total track point, NPo (t) is the longitude value of the ice data point near the total track point, NPt (t) is the thickness value of the ice data point near the total track point, and variable t is the data of the ice data point near the total track point.
Further, according to the total track point database and the ice data database, the average value of the ice thickness in the ice data near the total track point is calculated as follows:
At(j)＝∑NPt(t)/t
where At (j) represents the ice thickness value of the total track point.
Further, the duty ratio of the ice range and the open water range in the total range is calculated as follows:
performing distance evaluation on two adjacent total track points, and finally summing to obtain a total course;
performing distance evaluation on two adjacent assigned track points, and finally summing to obtain an ice range;
subtracting the ice area range from the total range to obtain an open water range;
the calculation mode of the ice area course and the open water area course in the total course is as follows:
IL＝∑D j
ε 2 ＝1-ε 1
wherein: d (D) j Representing the length between two adjacent assigned track points, IL representing the length of the ice range, T representing the total range length, ε 1 And epsilon 2 Representing the duty cycle of the range of the ice area and the open area in the total range respectively.
Further, the ice thickness distribution ratio is calculated as follows:
dividing and sorting ice thickness data of assigned track points into s ranges by po (s-1) ～po s For boundary, find out the number qo of assigned track points in different ranges s And the ratio omega of the number W of all assigned track points s Omega is used s As weights for different ranges of ice thickness;
the number of ice data points in different ice thickness ranges is calculated as follows:
the total number of assigned track points is as follows:
W＝∑q s
the ice thickness distribution ratio was determined as follows:
ω s ＝qo s /W。
finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (3)
1. A sea ice thickness data processing system on an ice area airliner, comprising:
the ice database and track database building module: the method comprises the steps of acquiring initial track point data from a ship automatic identification system database, and acquiring ice data near the initial track point to obtain an ice data database; fitting the initial track points to obtain a virtual track point database; the method comprises the steps of integrating the initial track points and the virtual track points to obtain a total track point database and a fitting track;
track point ice data extraction module: the method comprises the steps of obtaining an average value of ice thickness in ice data near a total track point according to the total track point database and the ice data database, and giving the average value to the total track point to obtain an assigned track point;
and a data analysis and output module: the method comprises the steps of obtaining the ice thickness distribution ratio, the duty ratio of the ice area course and the open water area course in the fitting track according to the assigned track points, and outputting the ice thickness distribution ratio, the duty ratio of the ice area course and the open water area course in the total course of the fitting track;
the ice data database is obtained in the following manner:
the ice data database is obtained by delineating ice data near the initial track points according to longitude and latitude coordinates of the i initial track points:
wherein: ALa (i) is the latitude value of the initial track point, ALo (i) is the longitude value of the initial track point, L (i) is the ice thickness data set near the initial track point, ILo (i) is the ice thickness data longitude value solution set near the initial track point, ILa (i) is the ice thickness data latitude value solution set near the initial track point, O i Longitude value of ice thickness data near the initial track point, A i Latitude values of ice thickness data near the initial track data points;
the virtual track point database is obtained in the following way:
fitting the initial track points by using an interpolation method to obtain the virtual track points;
performing linear interpolation fitting on the initial track points, projecting line segments formed by every two adjacent initial track points in the longitudinal direction, adding one fitting track point on a projection line at intervals x,
the formula is as follows:
BLo(n)＝x(m-1)
m＝(ALo(i+1)-ALo(i))/x
wherein: BLo (n) represents a virtual track point longitude value, and BLa (n) represents a virtual track point latitude value; n is the number of virtual track points;
the total track points in the total track point database are j=n+i, and the longitude and latitude values are as follows: (CLa (j), CLo (j));
the ice data acquisition mode near the total track point is as follows:
each total track point in the total track point database is sequentially subjected to region matching with longitude and latitude values of the ice data database to obtain ice data near each total track point, wherein the specific formula is as follows:
wherein: CLa (j) is the longitude value of the total track point, CLo (j) is the latitude value of the total track point, NPa (t) is the latitude value of the ice data point near the total track point, NPo (t) is the longitude value of the ice data point near the total track point, NPt (t) is the thickness value of the ice data point near the total track point, and variable t is the number of the ice data points near the total track point;
the duty ratio of the ice range and the open water range in the total range is calculated as follows:
performing distance evaluation on two adjacent total track points, and finally summing to obtain a total course;
performing distance evaluation on two adjacent assigned track points, and finally summing to obtain an ice range;
subtracting the ice area range from the total range to obtain an open water range;
the calculation mode of the ice area course and the open water area course in the total course is as follows:
IL＝∑D j
ε 2 ＝1-ε 1
wherein: d (D) j Representing the length between two adjacent assigned track points, IL representing the length of the ice range, T representing the total range length, ε 1 And epsilon 2 The ratio of the course of the ice area to the course of the open water area in the total course is represented respectively;
the ice thickness distribution ratio is calculated as follows:
dividing and sorting ice thickness data of assigned track pointsThe ice thickness is in the range of s, in po (s-1) ～po s For boundary, find out the number qo of assigned track points in different ranges s And the ratio omega of the number W of all assigned track points s Omega is used s As weights for different ranges of ice thickness;
the number of ice data points in different ice thickness ranges is calculated as follows:
the total number of assigned track points is as follows:
W＝∑q s
the ice thickness distribution ratio was determined as follows:
ω s ＝qo s /W。
2. the system for processing ice thickness data on ice area airlines according to claim 1, wherein said ice data comprises latitude and longitude values and ice thickness values corresponding to said latitude and longitude values.
3. The system for processing sea ice thickness data on an ice area route according to claim 1, wherein the average value of the ice thickness in the ice data near the total track point is calculated according to the total track point database and the ice data database as follows:
At(j)＝∑NPt(t)/t
where At (j) represents the ice thickness value of the total track point.
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