CN112460439A - Vegetation canopy spectrum two-way reflection distribution observation support and method - Google Patents
Vegetation canopy spectrum two-way reflection distribution observation support and method Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
- F16M11/42—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters with arrangement for propelling the support stands on wheels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
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- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
- F16M11/20—Undercarriages with or without wheels
- F16M11/24—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other
- F16M11/26—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other by telescoping, with or without folding
- F16M11/28—Undercarriages for supports with one single telescoping pillar
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N2021/4704—Angular selective
- G01N2021/4709—Backscatter
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N2021/4735—Solid samples, e.g. paper, glass
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Abstract
The application provides a vegetation canopy spectrum two-way reflection distribution observation support and a method, wherein the vegetation canopy spectrum two-way reflection distribution observation support comprises: the triangular support and the first view field map frame can adjust the folding and unfolding amplitude; the center and the bottom of the top of the triangular support are respectively provided with a group of telescopic support rods and a sharp corner structure, and the support height of the telescopic support rods and the sharp corner structure can be adjusted; the telescopic supporting rod is provided with a supporting adjusting scale, a fixing buckle and an observation zenith angle ranging tape measure in sequence from bottom to top, the peripheral boundary of the telescopic supporting rod is provided with a second view field map frame with equal side length as the first view field map frame, and the second view field map frame is formed by connecting a plurality of equal-length connecting rods which mark azimuth angle scales end to end. The structures are connected tightly, and the portable outdoor ground observation device has the characteristics of simple structure, portability and portability, and is suitable for field observation and uneven ground with elevation change.
Description
Technical Field
The application relates to the technical field of remote sensing ground test application, in particular to a vegetation canopy spectrum two-way reflection distribution observation support and a method.
Background
The remote sensing satellite is an artificial satellite used as an outer space remote sensing platform. The remote sensing technology using a satellite as a platform is called satellite remote sensing. Typically, telemetry satellites can operate on orbit for years. The satellite orbit can be determined as desired. The remote sensing satellite can cover the whole earth or any designated area within a specified time, and can continuously remotely sense a designated area on the earth surface when running along a geosynchronous orbit.
The sensor on the remote sensing satellite has been developed into the multi-angle by single angle step by step, in quantitative remote sensing field, for studying satellite multi-angle remote sensing theory, needs the research of multi-angle ground verification inversion algorithm, and early multi-angle observation is carried out by the handheld spectrum appearance of experimenter completely, and not only complex operation, the process is complicated, and operating time is longer moreover, hardly obtains comparatively accurate experimental data, needs ground multi-angle observation device.
The existing ground multi-angle observation device has the defects of complex component structure, heavy volume, difficult carrying, unsuitability for field observation and unsuitability for uneven ground with elevation change.
Disclosure of Invention
The embodiment of the application aims to provide a vegetation canopy spectrum two-way reflection distribution observation support and a method, which have the characteristics of simple structure, light weight and convenience in carrying and are suitable for uneven ground with elevation change.
In order to solve the technical problem, the following technical scheme is adopted in the application:
in a first aspect of the application, a vegetation canopy spectrum two-way reflection distribution observation support is provided, which comprises a triangular support capable of adjusting retraction amplitude and a first view field map frame; wherein the content of the first and second substances,
the center and the bottom of the top of the triangular support are respectively provided with a group of telescopic support rods and a sharp corner structure, and the support height of the telescopic support rods and the sharp corner structure can be adjusted;
the telescopic supporting rod is provided with a supporting adjusting scale, a fixing buckle and an observation zenith angle ranging tape measure in sequence from bottom to top, the peripheral boundary of the telescopic supporting rod is provided with a second view field map frame with equal side length as the first view field map frame, and the second view field map frame is formed by connecting a plurality of equal-length connecting rods which mark azimuth angle scales end to end.
In one embodiment, the head end and the tail end of the connecting rod are provided with connecting buckles.
In one embodiment, the second field of view frame is a rectangular structure.
In one embodiment, the vegetation canopy spectrum bidirectional reflection distribution observation support comprises two triangular supports which are respectively arranged at the left side and the right side.
In one embodiment, the triangular bracket is fixedly connected with the telescopic supporting rod through a bolt.
In a second aspect of the present application, there is provided a vegetation canopy spectrum bidirectional reflectance distribution observation method implemented based on the vegetation canopy spectrum bidirectional reflectance distribution observation support described in any one of the above, including the following steps:
calibrating geometric parameters used for observation, wherein the geometric parameters comprise a zenith angle between observation and incident directions of the two-way reflection distribution of the canopy layer and an observation azimuth angle between radiation and the incident directions;
positioning and identifying a solar radiation source and a zenith angle and an azimuth angle of an observation sensor which are respectively positioned on a main plane of a solar incident radiation direction and a vertical main plane vertical to the main plane;
respectively observing multi-angle radiation signals including the incidence forward direction, the reverse backward direction and different positions vertical to the main plane of the canopy solar radiation;
and obtaining a radiation observation data set with complete vegetation canopy two-way reflection distribution information by using the multi-angle observation support.
In one embodiment, the numerical values of the zenith angle and the observation azimuth angle are respectively determined by the observation zenith angle ranging tape at the top end of the telescopic supporting rod and the azimuth positioning scale of the second view field picture frame.
In one embodiment, the azimuth positioning scale of the second view field frame is an angle ranging scale.
In one embodiment, the azimuth positioning scale of the observation zenith angle ranging tape is an angle ranging scale.
In one embodiment, the vegetation canopy bi-directional reflection distribution information includes zenith and azimuth angles of radiation incidence and reflection observation processes.
Compared with the prior art, the technical scheme of the application has the following advantages:
the application provides a vegetation canopy spectrum two-way reflection distribution observation support which comprises a triangular support and a first view field map frame, wherein the triangular support can adjust the retraction amplitude; the center and the bottom of the top of the triangular support are respectively provided with a group of telescopic support rods and a sharp corner structure, and the support height of the telescopic support rods and the sharp corner structure can be adjusted; the telescopic supporting rod is provided with a supporting adjusting scale, a fixing buckle and an observation zenith angle ranging tape measure in sequence from bottom to top, the peripheral boundary of the telescopic supporting rod is provided with a second view field map frame with equal side length as the first view field map frame, and the second view field map frame is formed by connecting a plurality of equal-length connecting rods which mark azimuth angle scales end to end. The structures are connected tightly, and the portable outdoor ground observation device has the characteristics of simple structure, portability and portability, and is suitable for field observation and uneven ground with elevation change.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
FIG. 1 is a block diagram of a spectral two-way reflectance distribution observation support for vegetation canopies according to an embodiment of the present application;
fig. 2 is a flowchart of a method for observing spectral dichroism distribution of a vegetation canopy according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
The remote sensing technology can acquire the reflection, radiation and backscattering information (hereinafter referred to as reflection) of the ground object target in a large-scale and real-time manner, realizes the efficient cognition on the ground object characteristics, and has wide application prospect in the aspects of homeland, resources, surveying and mapping, meteorology, military reconnaissance and the like. With the development of earth observation remote sensing technology towards quantification application direction, the reflection characteristic of the earth becomes an important basis and basic data in the aspects of earth identification, geological prospecting, crop pest monitoring, sensor development and the like, and the quantification and refinement research of the reflection characteristic of the earth has been widely regarded at home and abroad. Theoretical analysis and application research show that the ground object reflection characteristics have the Bidirectional reflection Function (BRDF) characteristics, namely the reflection characteristics are related to the sunlight incidence direction (azimuth direction and inclination) and the measurement direction (azimuth direction and inclination), so that the Bidirectional characteristics of the ground object reflection are scientifically measured, and the method has important significance for researching the spectrum directivity of the ground object, multi-angle remote sensing and quantitative remote sensing.
The direct solar light is converted into scattered light through scattering absorption of the atmosphere and target reflection; the simulation of the process is realized by measuring or calculating the scattering radiation distribution of the target background under different illumination and observation conditions so as to obtain the scattering Bidirectional Reflectance (BRDF) of the target background, and then obtaining the ground multi-angle reflectivity image according to the spectral image.
As shown in fig. 1, the present embodiment provides a vegetation canopy spectrum bidirectional reflection distribution observation support, so as to solve the problems that the existing ground multi-angle observation device has a complex component structure, a heavy volume, is not easy to carry, is not suitable for field observation, and is not suitable for uneven ground with elevation changes. In one embodiment, the vegetation canopy spectral reflectance distribution observation support comprises: the triangular support 3 and the first view field map frame 1 can adjust the folding and unfolding amplitude; wherein the content of the first and second substances,
the top center of triangle-shaped support 3 is provided with a set of flexible bracing piece 2 of adjustable support height, and this flexible bracing piece 2 can freely stretch out and draw back along the vertical direction, the bottom of the three supporting legs of triangle-shaped support 3 is provided with the closed angle structure for improve triangle-shaped support 3's fastness, in addition because triangle-shaped has higher stability, can make triangle-shaped support 3 form stable support frame like this, make other stable in structure on the triangle-shaped support 3 install.
In addition, flexible bracing piece 2 is long and thin and can set up to the black, avoids self reverberation to produce near effect to the crop spectrum, and the shade of flexible bracing piece 2 can accomplish the observation task fast to the sheltering from of the target that awaits measuring when avoiding measuring.
In an embodiment, the telescopic support rod 2 is sequentially provided with a support adjusting scale, a fixed buckle 6 and an observation zenith angle distance measuring tape 4 from bottom to top, a second view field map frame with the same side length as the first view field map frame 1 is arranged on the peripheral boundary of the telescopic support rod 2, and the second view field map frame is formed by connecting a plurality of equal-length connecting rods which mark azimuth angle scales end to end.
The utility model provides a vegetation canopy spectrum two-way reflection distribution observation support, which comprises a triangular support 3 with adjustable retraction amplitude and a first view field map frame 1; the center and the bottom of the top of the triangular support 3 are respectively provided with a group of telescopic support rods 2 with adjustable support height and a sharp corner structure; the telescopic supporting rod 2 is sequentially provided with a supporting adjusting scale, a fixing buckle 6 and an observation zenith angle distance measuring tape 4 from bottom to top, the peripheral boundary of the telescopic supporting rod 2 is provided with a second view field map frame with equal side length as the first view field map frame 1, and the second view field map frame is formed by connecting a plurality of equal-length connecting rods which mark azimuth angle scales end to end. The structures are connected tightly, and the portable outdoor ground observation device has the characteristics of simple structure, portability and portability, and is suitable for field observation and uneven ground with elevation change.
In one embodiment, the support adjustment scale and the observation zenith angle ranging tape 4 can be accurate to millimeter units; first visual field map frame 1 and second visual field map frame all comprise a plurality of map frame connecting rods and connecting rod buckle 5, and the length of single map frame connecting rod is about 100 centimetres, and each map frame connecting rod passes through the concatenation can be dismantled to connecting rod buckle 5 to dismantle and carry, and the length of picture frame connecting rod is about 200 centimetres after the concatenation.
In an embodiment, the telescopic support rod 2 further comprises a lifting main body limited in the circumferential direction and a driving screw connected with a driving motor, the driving screw is in threaded connection with the lifting main body, so that the driving motor drives the driving screw to rotate, and the driving screw drives the lifting main body to freely lift along the vertical direction through threads. Further preferably, the driving motor is connected with the control device, two lifting modes of manual operation and automatic operation of the telescopic supporting rod 2 are realized through the control device, and the height of the second view field picture frame is adjusted through the telescopic supporting rod 2 so as to keep the object to be measured and the light source at the same height and obtain the same illumination condition.
Preferably, the bottom of the triangular bracket 3 can be provided with universal wheels to facilitate the free movement of the device.
In an embodiment, the first view field frame 1 and the second view field frame are both rectangular structures made of aluminum, and are stable and light in structure and convenient to carry.
In an embodiment, the vegetation canopy spectrum two-way reflection distribution observation support comprises two triangular supports 3, the two triangular supports 3 are respectively arranged at the left side and the right side, and the two triangular supports 3 are on the same horizontal plane, so as to ensure the balance of the second view field frame.
In one embodiment, the triangular bracket 3 is fixedly connected with the telescopic support rod 2 through bolts. Therefore, the vegetation canopy spectrum two-way reflection distribution observation support can be quickly disassembled and assembled, long-distance transportation is facilitated, the adaptability of the earth surface form is high, and field remote sensing observation and measurement position change are facilitated.
As shown in fig. 2, in a second aspect of the present application, there is provided a vegetation canopy spectrum bidirectional reflectance distribution observation method implemented based on the vegetation canopy spectrum bidirectional reflectance distribution observation support, including the following steps:
s11, calibrating geometric parameters used for observation, wherein the geometric parameters comprise a zenith angle between observation and incident directions of two-way reflection distribution of the vegetation canopy and an observation azimuth angle between radiation and the incident directions;
in this step, the geometric parameters used for observation can be automatically calibrated by the measuring instrument. The zenith angle between the observation direction and the incident direction is an included angle between the incident direction of the light and the zenith direction; the azimuth angle is also called horizontal longitude, and is one of the methods for measuring the angle difference between objects on a plane, and is the horizontal included angle from the north-seeking direction line of a certain point to the target direction line along the clockwise direction.
S12, positioning and identifying a solar radiation source and an observation sensor zenith angle and azimuth angle which are respectively positioned on a solar incident radiation azimuth main plane and a vertical main plane vertical to the solar incident radiation azimuth main plane;
after the geometric parameters used for observation are calibrated, the solar radiation source and the zenith angle and azimuth angle of the observation sensor which are respectively positioned on the main plane of the solar incident radiation azimuth and the main plane vertical to the main plane are positioned and identified.
S13, respectively observing multi-angle radiation signals including the incidence forward direction, the reverse direction and the different positions of the vertical main plane of the canopy solar radiation;
and S14, obtaining a radiation observation data set with complete vegetation canopy two-way reflection distribution information by using the multi-angle observation support.
The multi-angle radiation signal that this embodiment contains canopy solar radiation incidence forward direction position, reverse direction backward position and perpendicular principal plane different positions through the multi-angle observation support is surveyed, acquires the distribution information of vegetation canopy two-way reflection multiple directions, generates complete radiation observation data set to improve experimental efficiency and accuracy.
The portable canopy measuring system can measure the canopy, so that the research on ground verification inversion algorithms for researching the satellite multi-angle remote sensing theory is realized.
The utility model provides a vegetation canopy spectrum two to reflection distribution observes support solves and carries out quick acquisition data, portable, and technical problem such as fast assembly carries on sensor probe that quick assembly has realized the automation to ground object two to the reflection, earth's surface observation such as reflectivity and transmissivity carry out all-round multi-angle observation equipment, has practiced thrift manpower and materials greatly, has improved experimental efficiency and accuracy.
In one embodiment, the values of the zenith angle and the observation azimuth angle are respectively determined by the observation zenith angle ranging tape 4 at the top end of the telescopic support rod 2 and the azimuth positioning scale of the second view field frame.
In an embodiment, the azimuth positioning scale of the second view field frame is an angle distance measuring scale, and the azimuth positioning scale of the observation zenith angle distance measuring tape 4 is also an angle distance measuring scale.
In one embodiment, the vegetation canopy bi-directional reflection distribution information includes zenith and azimuth angles of radiation incidence and reflection observation processes.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. The vegetation canopy spectrum bidirectional reflection distribution observation support is characterized by comprising a triangular support capable of adjusting retraction amplitude and a first view field map frame; wherein the content of the first and second substances,
the center and the bottom of the top of the triangular support are respectively provided with a group of telescopic support rods and a sharp corner structure, and the support height of the telescopic support rods and the sharp corner structure can be adjusted;
the telescopic supporting rod is provided with a supporting adjusting scale, a fixing buckle and an observation zenith angle ranging tape measure in sequence from bottom to top, the peripheral boundary of the telescopic supporting rod is provided with a second view field map frame with equal side length as the first view field map frame, and the second view field map frame is formed by connecting a plurality of equal-length connecting rods which mark azimuth angle scales end to end.
2. The observation support for observing spectral two-way reflection distribution of vegetation canopies according to claim 1, wherein the head end and the tail end of the connecting rod are provided with connecting buckles.
3. The vegetation canopy spectral bi-directional reflectance distribution observation support of claim 1, wherein the second field of view frame is a rectangular structure.
4. The observation support for observing the spectral bidirectional reflection distribution of a vegetation canopy according to claim 1, comprising two triangular supports, wherein the two triangular supports are respectively arranged at the left side and the right side.
5. The observation support for observing spectral two-way reflection distribution of vegetation canopy according to claim 1, wherein the triangular support is fixedly connected with the telescopic supporting rod through a bolt.
6. A vegetation canopy spectrum two-way reflection distribution observation method is realized based on the vegetation canopy spectrum two-way reflection distribution observation support of any one of claims 1 to 5, and comprises the following steps:
calibrating geometric parameters used for observation, wherein the geometric parameters comprise a zenith angle between observation and incident directions of the two-way reflection distribution of the canopy layer and an observation azimuth angle between radiation and the incident directions;
positioning and identifying a solar radiation source and a zenith angle and an azimuth angle of an observation sensor which are respectively positioned on a main plane of a solar incident radiation direction and a vertical main plane vertical to the main plane;
respectively observing multi-angle radiation signals including the incidence forward direction, the reverse backward direction and different positions vertical to the main plane of the canopy solar radiation;
and obtaining a radiation observation data set with complete vegetation canopy two-way reflection distribution information by using the multi-angle observation support.
7. The observation method of spectral two-way reflection distribution of a vegetation canopy according to claim 6, wherein the numerical values of the zenith angle and the observation azimuth angle are determined by an observation zenith angle ranging tape at the top end of the telescopic support rod and an azimuth positioning scale of the second view field map frame, respectively.
8. The observation method of the spectral bi-directional reflection distribution of vegetation canopies according to claim 7, wherein the orientation positioning scale of the frame of the second field of view map is an angular ranging scale.
9. The observation method of spectral two-way reflection distribution of vegetation canopy according to claim 7, wherein the azimuth positioning scale of the observation zenith angle ranging tape is an angle ranging scale.
10. The observation method of the spectral bidirectional reflectance distribution of a vegetation canopy according to claim 6, wherein the information of the spectral bidirectional reflectance distribution of the vegetation canopy includes zenith and azimuth angles of the radiation incidence and reflection observation process.
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