CN109655583A - A kind of atmospheric environment ground monitoring website based on satellite remote sensing is deployed to ensure effective monitoring and control of illegal activities network-building method - Google Patents
A kind of atmospheric environment ground monitoring website based on satellite remote sensing is deployed to ensure effective monitoring and control of illegal activities network-building method Download PDFInfo
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Abstract
The invention discloses a kind of atmospheric environment ground monitoring website based on satellite remote sensing deploys to ensure effective monitoring and control of illegal activities network-building method, firstly, deploying to ensure effective monitoring and control of illegal activities in ground monitoring considers a wide range of continuous historical satellite image information in networking；Secondly, carrying out space time information excavation to multi-source satellite image data multiple dimensioned when more, the polluted informations such as pollution geographical distribution, pollution evolution trend and the pollution variety frequency of long-term sequence are obtained；Then, the polluted information based on historical satellite image determines high pollution areas and pollution high frequency region of variation；Finally, pollution classification region division encrypted area and rarefaction based on judgement, and then networking of deploying to ensure effective monitoring and control of illegal activities, establish reasonable, low consumption, effective ground pollution monitoring net.Ground monitoring website provided by the invention is deployed to ensure effective monitoring and control of illegal activities, and networking plan is more reasonable, and with the consumption of the smallest manpower, material resources and financial resources, the ground monitoring information of acquisition data peak use rate has a good application prospect in environmental grounds monitoring field.
Description
Technical field
The present invention relates to Aero Satellite remote sensing application technical fields, and in particular to a kind of atmospheric environment based on satellite remote sensing
Ground monitoring website is deployed to ensure effective monitoring and control of illegal activities network-building method.
Background technique
Atmospheric environment ground monitoring net can obtain true real-time as the most direct atmosphere environment supervision means in ground
Surface air environmental information, quantitative description Status Quo of Atmospheric Pollution are administered policy making for atmosphere environment supervision and are provided
Reliable solid reference.How to establish atmospheric environment ground monitoring net is the problem of environment monitoring department must be taken into consideration.Mesh
Preceding universal atmospheric environment ground monitoring net is not knowing the pollution of monitoring section domain using uniformly distributed mode, this mode
It is optimal selection when situation, and is also reasonable when monitoring region pollution condition is more consistent.However, in reality
Pollution situation tends to rely on the factors such as discharge source distribution, geographical location, climate change, this has the pollution of different regions
Apparent space and time difference.If continuing the scheme using ground monitoring website of uniformly deploying to ensure effective monitoring and control of illegal activities, light contaminated areas can be made to monitor
Data redundancy, heavily contaminated area monitoring data are insufficient, are chronically at the regional monitoring data redundancy of identical pollution situation, pollute shape
The continually changing regional monitoring data of condition are insufficient.So the networking of deploying to ensure effective monitoring and control of illegal activities of atmospheric environment ground monitoring website needs to consider monitoring
Regional pollution situation.
Important component of the atmosphere environment supervision satellite as space-based atmosphere environment supervision field, it is available it is continuous,
Multiple dimensioned, large-scale atmosphere pollution information has been widely used in the inverting of ground pollution object at present, has traced to the source, transmits diffusion
Deng.Foreign countries are more early based on satellite remote sensing Pollution Study, provide the free download of the satellite data of many long-term sequences,
This provides the data support for enriching preciousness for the Historical Pollution situation that research China monitors region.Atmospheric environment satellite packet at present
Include active satellite and passive satellite.The active passing of satelline emits laser to the ground, is then based on received return laser beam
Signal carrys out inverting atmospheric information.Advantage is not influenced by weather conditions, available atmosphere under the situation for having cloud
Information；Available SEQUENCING VERTICAL information, this plays an important role research SEQUENCING VERTICAL situation.The disadvantage is that due to signal
Source is actively to emit laser signal, and the laser once emitted is limited, and the size of laser beam is also limited, this just makes
About the ground areas once detected, satellite revisiting period generally at 10 days or more, be unfavorable for study ground pollution distribution situation；
Inversion accuracy is poor compared with passive satellite, and active satellite needs Layer by layer inversion atmospheric information more focused on SEQUENCING VERTICAL information, this must
So expand final atmospheric information error.Passive satellite is using solar source as signal source, as long as there is light that can obtain
It negates and penetrates signal, and then obtain atmospheric information.Advantage is that revisiting period is short, it is available day by day by when atmospheric information, or even can
To obtain the atmospheric information of minute grade；Atmosphere Product inversion accuracy is high, and passive satellite is the direct entire vertical column using acquisition
The echo-signal inverting atmospheric information of shape, only once inverting, error are lower.Disadvantage is susceptible to the influence of weather conditions,
The basic inverting not atmospheric information under the situation for having cloud.Since atmospheric remote sensing ground monitoring website only needs to pay close attention to monitoring region
Geographical distribution is polluted, so this invention uses passive satellite data.
Passive atmospheric environmental satellite is segmented into polar-orbiting satellite and fixed statellite due to purpose difference.Polar-orbiting satellite
It operates on near-earth sun synchronous satellite orbit, periodically passes by daily primary, available atmosphere pollution information day by day can be used
Pollution level in assessment monitoring region different regions.There is NASA in 1999 using more atmosphere polar-orbiting satellite at present
The Terra satellite and Aqua satellite of the transmitting of year and 2002, the Moderate Imaging Spectroradiomete (MODIS) carried above it can
To obtain the spectral information in 36 channels, these abundant informations are based on, it is big that the inverting of NASA official website has obtained reflection
The product of gas information and freely to the whole world provide downloading.The full spectral coverage light of No. five Seeds of First Post-flight of high score of the transmitting of China 2018
The sensors such as imager, atmospheric aerosol multi-angle Polarimeter, atmosphere main greenhouse gas detector are composed, are expected to become
The leading source of China's future atmosphere pollution information.Fixed statellite operates on geostationary orbit, runs angular speed and the earth
Rotational velocity is the same, so this kind of satellite is to remain static in ground observation.Therefore, fixed statellite can provide fixed point
It is observed when more, temporal resolution can be minute grade and hour grade, be suitable for detecting atmosphere pollution variation.At present using more
Atmosphere fixed statellite is Japan Meteorological Agency in No. 8 satellites of sunflower of transmitting in 2014, carries advanced sunflower imager thereon
(AHI) there are 16 channels, the visible light and infrared image of the Asian-Pacific area can be captured.Japan Meteorological Agency can provide at present
Atmosphere Product after 2016, the secondary product including every ten minutes and the three-level product by hour.China's high score four are defended
Star is also a fixed statellite, but currently without atmospheric retrieval product is provided, future is expected to publication Atmosphere Product.
Summary of the invention
The present invention is directed to be directed to the technological deficiency of the prior art, a kind of atmospheric environment ground prison based on satellite remote sensing is provided
Survey station point is deployed to ensure effective monitoring and control of illegal activities network-building method, to solve the lower technical problem of conventional method efficiency in the prior art.
Another technical problem to be solved by the present invention is that the method uniformly arranged net at present leads to monitoring data availability
It is lower.
To realize the above technical purpose, the invention adopts the following technical scheme:
A kind of atmospheric environment ground monitoring website based on satellite remote sensing is deployed to ensure effective monitoring and control of illegal activities network-building method, comprising the following steps:
1) selection is able to carry out the polar-orbiting satellite observed day by day of atmospheric condition timing, and can atmospheric sounding pollution in a few days become
The fixed statellite of change；
2) historical satellite Atmosphere Product is downloaded, and satellite data is pre-processed, indicates atmospheric pollution level to obtain
Mean data library and indicate atmosphere pollution variation frequency variance database；
3) sentenced respectively based on threshold method, region-growing method image Segmentation Technology using mean data library and variance database
Determine high pollution area, pollution high frequency variation zone；
4) step 3) is determined that obtained high pollution area and high frequency change the geographical distribution of contaminated area with being included in atmospheric environment
Face monitoring station is deployed to ensure effective monitoring and control of illegal activities in networking.
Preferably, polar-orbiting satellite described in step 1) includes Terra satellite, No. five satellites of Aqua satellite or high score；Step
It is rapid 1) described in fixed statellite include No. four satellites of No. 8 satellites of sunflower or high score.
Preferably, pretreatment described in step 2) includes: to calculate monitoring region pollution level and calculating monitoring region
Pollution variety frequency.
Preferably, considering the month of pollution concentration, season mean value and average annual when calculating and monitoring region pollution level
Value.
Preferably, considering the variance of pollution concentration when calculating the pollution variety frequency in monitoring region
Preferably, threshold method described in step 3) includes: the number for first determining classification, then determine it is of all categories up and down
Limit, and then threshold value Tm-1；Classification results are obtained according to following formula (1)；
In formula (1), G (i, j) indicates the classification results of the i-th row j column in output image；F (i, j) is indicated the in input picture
The mean value or variance of i row j column；The classification number of m presentation class；Tm-1Indicate threshold value and the other critical value of every type；M takes greatly
In the positive integer for being equal to 2.
Preferably, replacing the threshold method using using region-growing method.
Preferably, the region-growing method includes:
A) image sequence is scanned, finds the 1st pixel belonged to not yet, if the pixel is f (x0, y0)；
B) centered on (x0, y0), the 8 neighborhood territory pixel f (x, y) of (x0, y0) are considered, if (x, y) meets growth criterion
(| f (x0, y0)-f (x, y) |≤Δ T), (x, y) and (x0, y0) is merged into (in the same area), while (x, y) is pressed into heap
Stack；
C) pixel is taken out from storehouse, it is returned to step b) as (x0, y0)；
D) when storehouse is empty, step a) is returned to；
E) step a)~step d) is repeated when each point in image has ownership, and growth terminates.
Preferably, step 4) further include: website is laid for high pollution area and high frequency variation pollution zone encryption, for light
Contaminated area and constant value concentration contaminated area, which are reduced, lays website.
The invention discloses a kind of atmospheric environment ground monitoring website based on satellite remote sensing deploys to ensure effective monitoring and control of illegal activities network-building method, firstly,
It deploys to ensure effective monitoring and control of illegal activities in ground monitoring and considers a wide range of continuous historical satellite image information in networking；Secondly, multiple dimensioned when more to multi-source
Satellite image data carry out space time information excavation, obtain pollution geographical distribution, pollution evolution trend and the dirt of long-term sequence
Contaminate the polluted informations such as change frequency；Then, the polluted information based on historical satellite image determines high pollution areas and pollution high frequency
Region of variation；Finally, pollution classification region division encrypted area and rarefaction based on judgement, and then networking of deploying to ensure effective monitoring and control of illegal activities, establish rationally,
Low consumption, effective ground pollution monitoring net.Ground monitoring website provided by the invention networking plan of deploying to ensure effective monitoring and control of illegal activities is more reasonable, with the smallest
The consumption of manpower, material resources and financial resources obtains the ground monitoring information of data peak use rate, has very in environmental grounds monitoring field
Good application prospect.
The present invention has the advantages that including following aspect:
(1) it deploys to ensure effective monitoring and control of illegal activities in atmospheric environment ground monitoring website and considers the atmosphere pollution information in monitoring region in networking.
(2) Atmospheric Remote Sensing by Satellite product, the history atmosphere pollution of available entire monitoring region long-term sequence are utilized
Information.
(3) easy to accomplish using the pollution level and pollution variety frequency of concentration and variance characterization monitoring region.
(4) using mature image Segmentation Technology, easy to accomplish and effect is preferable
(4) present invention instructs the networking of deploying to ensure effective monitoring and control of illegal activities of ground monitoring website with atmospheric remote sensing data, can with minimal consumption, most
Big data utilization rate realizes rationally and effectively surface air environmental monitoring.
Detailed description of the invention
Fig. 1 is the flow diagram of the method for the present invention.
Specific embodiment
Below by specific embodiments of the present invention will be described in detail.In order to avoid excessive unnecessary details,
It will not be described in detail in following embodiment to belonging to well known structure or function.Approximation used in following embodiment
Language can be used for quantitative expression, show to allow quantity to have certain variation in the case where not changing basic function.It is fixed except having
Adopted outer, technical and scientific term used in following embodiment has the phase being commonly understood by with those skilled in the art of the invention
Same meaning.
Embodiment 1
The observation multiple dimensioned when can carry out more to monitoring region respectively of polar-orbiting satellite, fixed statellite, and it is more to provide multi-source
When multiple dimensioned historical satellite Atmosphere Product；Based on these Atmosphere Products abundant, the pollution level for calculating monitoring region is geographical
Distributional difference and pollution variety frequency, to determine to monitor the high pollution area in region and pollute high frequency variation zone, setting, which is deployed to ensure effective monitoring and control of illegal activities, to be added
Reasonable, low consumption, effective atmospheric environment ground pollution monitoring net are finally established in Mi Qu and rarefaction.
In order to achieve the above objectives, a kind of atmospheric environment ground monitoring website cloth based on satellite remote sensing provided in this embodiment
Control network-building method, comprising:
Step 1, since different satellites obtain Earth Information difference, monitoring region pollution situation geography point is obtained in order to reach
The purpose of cloth, has selected to be able to carry out the polar-orbiting satellite that atmospheric condition timing is observed day by day, and can atmospheric sounding pollution in a few days
The fixed statellite of variation.Polar-orbiting satellite is recommended to use Terra the and Aqua satellite of American history data rich, and future, which arranges net, may be used also
High score No. five satellites in China's to be taken into account.Fixed statellite is recommended to use No. 8 satellites of sunflower of Japan, if high score four publications
Atmosphere Product, future can also take into account.
Step 2, historical satellite Atmosphere Product is downloaded, and satellite data is pre-processed.Calculate monitoring regional pollution journey
When spending, month, season mean value and the year mean value of pollution concentration are considered.When calculating the pollution variety frequency in monitoring region, consider
The variance of pollution concentration.So far, it just obtains the mean data library for indicating atmospheric pollution level and indicates atmosphere pollution variation frequency
The variance database of degree.
Step 3, based on the image Segmentation Technologies such as threshold method, region-growing method, using mean data library and variance database,
High pollution area, pollution high frequency variation zone are determined respectively.Threshold method is a kind of most common parallel regions technology, it is image segmentation
The most one kind of middle number of applications.Threshold method is actually input picture F to output image G such as down conversion:
Wherein,
G (i, j) indicates the classification results of the i-th row j column in output image；
F (i, j) indicates the mean value or variance of the i-th row j column in input picture；
T indicates threshold value.
The key of threshold method is threshold value, accurately divides the image into and comes if it can determine that suitable threshold value.
After threshold value determines, the gray value of threshold value and pixel is compared one by one, the result of segmentation directly gives image-region.It can be with
The classification number classified as needed increases threshold value.The advantages of Threshold segmentation is that calculating is simple, operation efficiency is higher, speed is fast.
If threshold value cannot obtain good classification results, it is considered as region-growing method.The basic thought of region growing
It is that the pixel set with similar quality gets up to constitute region.Specifically first the region divided is needed to look for a seed picture to each
Starting point of the element as growth, the pixel (root that then will have same or similar property in sub-pixel surrounding neighbors with sub-pixel
Determine according to certain pre-determined growth or similarity criterion) in the region that is merged into where sub-pixel.By these new pixels
Continue process above as new sub-pixel, the pixel until not meeting condition again can be included.Region
Growth needs to select one group of sub-pixel that can correctly represent desired zone, determines similarity criterion during the growth process, system
Surely the condition or criterion for allowing growth to stop.Similarity criterion can be the characteristics such as gray level, colour, texture, gradient.Region growing
Crucial problem is the selection of seed and the determination of similar area decision criteria to method in practice.The selection of seed can be selected manually
It selects, for example the point of different levels of contamination will be represented as seed；The decision criteria of grayscale image is generally less than with gray scale difference value
Some threshold value indicates that different decision criterias may generate different segmentation results.The advantages of region-growing method is basic
Thought is relatively easy, can usually come out the connection region segmentation with same characteristic features, and can provide good boundary information and
Segmentation result.When no priori knowledge can use, optimal performance can be obtained.Excessively divide the disadvantage is that often will cause
It cuts, that is, divides the image into excessive region, room and time expense is all bigger.After being carried out when generating over-segmentation
Processing merges the similar region closed on.Algorithm of region growing is generally divided into three steps and realizes:
(1) growth seed point is determined；
(2) regulation growth criterion；
(3) growth stop condition is determined.
The present invention determines on the one hand to consider monitoring department for seriously polluted for monitoring the state of air pollution in region
The concern in area, this is the classification for considering a whole pollution level, can respectively to month, season mean value and year mean value into
Row concentration graded obtains the Seasonal Characteristics in monitoring region.On the other hand the geography for considering monitoring region pollution variety frequency is poor
It is different, pollution source can be learned further to the encryption monitoring of high frequency region of variation.
Step 4, step 3 is determined that obtained high pollution area and the geographical distribution of high frequency variation contaminated area are included in atmospheric environment
Ground monitoring website is deployed to ensure effective monitoring and control of illegal activities in networking.High pollution area and high frequency variation contaminated area are suitably encrypted and lay website, for light
Contaminated area and constant value concentration contaminated area suitably reduce the laying of website.
Embodiment 2
Below with reference to Fig. 1, the specific embodiment of the invention is described in further detail.
The present invention specify first using polar-orbiting satellite and fixed statellite come to monitoring region carry out multi-source, it is more when, more rulers
Degree ground is observed together, it is ensured that can obtain the atmospheric information of reflection monitoring region average daily concentration and in a few days concentration variation.For defending
Star Atmosphere Product controls the data at 2-3 grades using quality, it is ensured that the reliability of data；It uses simultaneously and is absorbed in vegetative coverage
Higher dark pixel method product and the dark blue algorithm product for being absorbed in the highlighted earth's surface such as city, it is ensured that data covering geographically
Cover degree.
Secondly, based on the history Aero Satellite data got, calculate the month of air pollution concentration, season mean value and
Year mean value.Specific formula for calculation is as follows:
Calculation formula is as follows:
Wherein,
N indicates the number of polar-orbiting satellite observation in time range；
xiIndicate that i-th polar-orbiting satellite is observed obtaining pollution concentration value in time range；
Indicate month, season mean value or the year mean value of pollution concentration.
When calculating the pollution variety frequency in monitoring region, consider that the variance of pollution concentration, calculation formula are as follows:
Wherein,
σ2It is the variance of pollution concentration in time range；
N indicates the number of fixed statellite observation in time range；
yiIndicate the pollution concentration value that i-th fixed statellite is observed in time range；
μ indicates the average value of pollution concentration in time range, calculates same formula (4).
So far, it just obtains the mean data library for indicating atmospheric pollution level and indicates the variance of atmosphere pollution variation frequency
Database.
Then, based on the image Segmentation Technologies such as threshold method, region-growing method, using mean data library and variance database,
High pollution area, pollution high frequency variation zone are determined respectively.For threshold method, first determines the number of classification, then determine of all categories
Bound, and then threshold value Tm-1.Classification results are obtained according to formula (1).
Wherein,
G (i, j) indicates the classification results of the i-th row j column in output image；
F (i, j) indicates the mean value or variance of the i-th row j column in input picture；
The classification number of m presentation class, can according to need self-defining；
Tm-1Expression threshold value and the other critical value of every type, m=2,3 ....
If threshold method classification results are bad, region-growing method can be used.It can be by the pollution concentration of all history images
Statistics with histogram is carried out, while considering concentration graded interval and each concentration frequency, selected seed point；Similarity criterion is set as one
A concentration change threshold (Δ T) is drawn when being less than the concentration change threshold into the region.
The specific implementation steps are as follows:
(1) image sequence is scanned, finds the 1st pixel belonged to not yet, if the pixel is f (x0, y0)；
(2) centered on (x0, y0), the 8 neighborhood territory pixel f (x, y) of (x0, y0) are considered, if (x, y) meets growth criterion
(| f (x0, y0)-f (x, y) |≤Δ T), (x, y) and (x0, y0) is merged into (in the same area), while (x, y) is pressed into heap
Stack；
(3) pixel is taken out from storehouse, it is returned to step (2) as (x0, y0)；
(4) it when storehouse is empty, returns to step (1)；
(5) step (1)-(4) are repeated when each point in image has ownership, growth terminates.
So far, so that it may by pollution concentration and pollution variety frequency partition at several major class, empirically determined levels of contamination,
Judgement obtains high pollution area and high frequency pollution variety area.
Finally, delimiting encrypted area and rarefaction, general high pollution area and dirt according to the levels of contamination geographic distribution of judgement
It contaminates high frequency variation zone and needs to encrypt laying ground actual measurement website, and low pollution area and pollution low frequency variations area then need to only be laid on a small quantity
Website, so far a minimal consumption, maximum data utilization rate reasonable effective atmosphere environmental grounds monitoring station deploy to ensure effective monitoring and control of illegal activities group
Net scheme just forms.
The embodiments of the present invention have been described in detail above, but content is only the preferred embodiment of the present invention,
It is not intended to limit the invention.All any modifications, equivalent replacements, and improvements etc. done in application range of the invention, should all
It is included within protection scope of the present invention.
Claims (9)
- The network-building method 1. a kind of atmospheric environment ground monitoring website based on satellite remote sensing is deployed to ensure effective monitoring and control of illegal activities, it is characterised in that including following step It is rapid:1) selection is able to carry out the polar-orbiting satellite observed day by day of atmospheric condition timing, and can atmospheric sounding pollution in a few days change Fixed statellite；2) historical satellite Atmosphere Product is downloaded, and satellite data is pre-processed, indicates the equal of atmospheric pollution level to obtain Value Data library and the variance database for indicating atmosphere pollution variation frequency；3) it is based on threshold method, region-growing method image Segmentation Technology, using mean data library and variance database, is determined respectively high Contaminated area, pollution high frequency variation zone；4) step 3) is determined that obtained high pollution area and the geographical distribution of high frequency variation contaminated area are included in atmospheric environment ground prison Survey station point is deployed to ensure effective monitoring and control of illegal activities in networking.
- The network-building method 2. a kind of atmospheric environment ground monitoring website based on satellite remote sensing according to claim 1 is deployed to ensure effective monitoring and control of illegal activities, It is characterized in that polar-orbiting satellite described in step 1) includes Terra satellite, No. five satellites of Aqua satellite or high score；Institute in step 1) Stating fixed statellite includes No. four satellites of No. 8 satellites of sunflower or high score.
- The network-building method 3. a kind of atmospheric environment ground monitoring website based on satellite remote sensing according to claim 1 is deployed to ensure effective monitoring and control of illegal activities, It is characterized in that pretreatment described in step 2) includes: the pollution variety for calculating monitoring region pollution level and calculating monitoring region Frequency.
- The network-building method 4. a kind of atmospheric environment ground monitoring website based on satellite remote sensing according to claim 3 is deployed to ensure effective monitoring and control of illegal activities, It is characterized in that, considering month, season mean value and the year mean value of pollution concentration when calculating and monitoring region pollution level.
- The network-building method 5. a kind of atmospheric environment ground monitoring website based on satellite remote sensing according to claim 3 is deployed to ensure effective monitoring and control of illegal activities, It is characterized in that, considering the variance of pollution concentration when calculating the pollution variety frequency in monitoring region.
- The network-building method 6. a kind of atmospheric environment ground monitoring website based on satellite remote sensing according to claim 1 is deployed to ensure effective monitoring and control of illegal activities, It is characterized in that threshold method described in step 3) includes: the number for first determining classification, bound of all categories is then determined, in turn Threshold value Tm-1；Classification results are obtained according to following formula (1)；In formula (1), G (i, j) indicates the classification results of the i-th row j column in output image；F (i, j) indicates the i-th row j in input picture The mean value or variance of column；The classification number of m presentation class；Tm-1Indicate threshold value and the other critical value of every type；M take greater than etc. In 2 positive integer.
- The network-building method 7. a kind of atmospheric environment ground monitoring website based on satellite remote sensing according to claim 1 is deployed to ensure effective monitoring and control of illegal activities, It is characterized in that, replacing the threshold method using using region-growing method.
- The network-building method 8. a kind of atmospheric environment ground monitoring website based on satellite remote sensing according to claim 7 is deployed to ensure effective monitoring and control of illegal activities, It is characterized in that the region-growing method includes:A) image sequence is scanned, finds the 1st pixel belonged to not yet, if the pixel is f (x0, y0)；B) centered on (x0, y0), consider the 8 neighborhood territory pixel f (x, y) of (x0, y0), if (x, y) satisfaction growth criterion (| f (x0, y0)-f (x, y) |≤Δ T), (x, y) and (x0, y0) is merged into (in the same area), while (x, y) is pressed into storehouse；C) pixel is taken out from storehouse, it is returned to step b) as (x0, y0)；D) when storehouse is empty, step a) is returned to；E) step a)~step d) is repeated when each point in image has ownership, and growth terminates.
- The network-building method 9. a kind of atmospheric environment ground monitoring website based on satellite remote sensing according to claim 1 is deployed to ensure effective monitoring and control of illegal activities, It is characterized in that, step 4) further include: website is laid for high pollution area and high frequency variation pollution zone encryption, for light contaminated area It is reduced with constant value concentration contaminated area and lays website.
Priority Applications (1)
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