CN104236616A - Monitoring and testing method for electric-transmission-line mountain fire satellite monitoring system - Google Patents

Abstract

The invention discloses a monitoring and testing method, including acquisition of satellite monitoring sensitivity, for an electric-transmission-line mountain fire satellite monitoring system. The monitoring and testing method includes selecting a testing satellite, an open site, a season, weather, time and orbit azimuth angle conditions, preparing a ground monitoring and measuring device, taking firewood as a flaming material, laying a fire ground at the center of the site, recording coordinates of the fire ground, setting fire to the fire ground before satellite transition, observing a quick satellite view in real time and recording time spent by system preprocessing during satellite transition, repeating fire-point judgment after pre-processing, observing whether the satellite can find the test fire ground or not until finding the critical length of the testing satellite finding the fire ground, and squaring the critical length to acquire the sensitivity of the testing satellite. The monitoring and testing method can be used for acquiring sensitivity, distortionless reception range and fire-point judgment threshold of the monitoring system under the conditions such as different weather and territories, thereby having great guiding significance for operation and accuracy improvement of the electric-transmission-line mountain fire monitoring system.

Description

Transmission line forest fire satellite monitoring system monitoring test method

Technical field

The present invention relates to the test method of a kind of mountain fire monitoring, particularly a kind of transmission line forest fire satellite monitoring system monitoring test method.

Background technology

Transmission line forest fire disaster takes place frequently, and mountain fire causes transmission line of electricity to trip has become one of principal element of harm power network safety operation.Near transmission line of electricity, mountain fire has that burnt area is little, overdo feature rapidly, therefore once there is mountain fire, should take prophylactico-therapeutic measures fast as much as possible.A situation arises to use satellite monitoring transmission line forest fire, can the mountain fire in the meagrely-populated place of Timeliness coverage, and the emergency reaction for mountain fire provides valuable tutorial message.

Existing satellite forest fire monitoring system remains in a lot of problem, such as different satellite can monitor under different weather condition the how large-area scene of a fire, monitoring accuracy rate how, sensitivity how, the problem how to calculate of Fire Monitoring point area needs to explore.In order to enable monitoring system utilize satellite data to greatest extent, fully grasping the characteristic of monitoring system, needing badly and monitoring test research is carried out to satellite monitoring device.Although the forest department of current use mountain fire satellite monitoring technologies had carried out similar test, but it only carries out acceptance test for the pass by satellite in the positive overhead of receiving station of a kind of weather condition, a kind of geographic position, weather satellite, satellite, test condition is single, test number (TN) is few, cannot represent actual mountain fire observation process.The monitoring of satellite mountain fire is remarkable by the impact of region, season, weather, satellite orbital position etc., need to propose a kind of monitoring test method containing multiple test condition, multiple satellite, for transmission line forest fire satellite monitoring system monitoring provide comprehensively, the guidance of system.

Summary of the invention

There are problems for existing transmission line forest fire satellite monitoring system to need to explore and test figure is in blank present situation, the invention provides a kind of transmission line forest fire satellite monitoring system monitoring test method, near monitoring transmission line of electricity, the characteristic of small size mountain fire, has important directive significance to the operation of monitoring system and the raising of precision.

Technical scheme of the present invention is: a kind of transmission line forest fire satellite monitoring system monitoring test method, comprises asking for of satellite monitoring sensitivity, ask for step as follows:

1. Selection experiment satellite;

2. area is selected to be not less than 1000m ²outdoor ward;

3. select seasonal conditions, weather condition, time conditions, track azimuth condions as required, and get out ground surveillance and measurement mechanism;

4. be comburant with faggot, lay the square scene of a fire that the length of side is L at center, place, record scene of a fire coordinate;

5. within 1 minute before test satellite passes by, the scene of a fire is lighted;

6. when satellite passes by, Real Time Observation satellite Quick view images;

7. pre-service complete after carry out fire point immediately and sentence knowledge, can observe satellites find to test the scene of a fire, if can, then return step 4., make L=L-5, wait for that test satellite passes by again, repeat fire point and sentence knowledge; If can not, then return step 4., make L=L+5, wait for that test satellite passes by again, repeat fire point and sentence knowledge; Until find test satellite to find, the critical edge in the scene of a fire is grown up little L ₀, then L ₀ ²be the sensitivity of test satellite under by step 3. selected condition.

In above-mentioned transmission line forest fire satellite monitoring system monitoring test method, described step 3. in, seasonal conditions is divided into spring, summer, autumn, the four seasons in winter, weather condition is divided into cloudy between ceiling unlimited, fine day, cloudy, time conditions is divided into day and night, rail conditions be Selection experiment satellite different cross the elevation angle, top.

In above-mentioned transmission line forest fire satellite monitoring system monitoring test method, described step 4. in, the scene of a fire and place Edge Distance must not be less than 10 meters; Comburant height is no more than 2 meters, lays except comburant without other comburants in place except testing.

Above-mentioned transmission line forest fire satellite monitoring system monitoring test method also comprises critical mistake and pushes up asking for of the elevation angle, asks for step as follows:

1. Selection experiment satellite;

2. area is selected to be not less than 1000m ²outdoor ward;

3. select seasonal conditions, weather condition, time conditions as required, and get out ground surveillance device;

4. take faggot as comburant, lay the square scene of a fire at center, place, the described scene of a fire length of side should be not less than test satellite under same test condition and find the critical length of side L in the scene of a fire ₀, record scene of a fire coordinate simultaneously;

5. selected to push up the track that passes by that the elevation angle is α;

6. within 1 minute before test satellite passes by, the scene of a fire is lighted;

7. when satellite passes by, Real Time Observation satellite Quick view images;

8. pre-service complete after carry out fire point immediately and sentence knowledge, can observe satellites find to test the scene of a fire, if can, then return step 5., make α=α-5, wait for that test satellite passes by again, repeat fire point and sentence knowledge; If can not, then return step 5., make α=α+5, wait for that test satellite passes by again, repeat fire point and sentence knowledge; Until find satellite to find, the critical of the scene of a fire crosses top angle of elevation alpha ₀, α ₀be step 3. under selected condition the critical of monitoring system acceptance test satellite orbit cross the elevation angle, top.

Above-mentioned transmission line forest fire satellite monitoring system monitoring test method also comprises 3 and sentences knowledge threshold value (the threshold value Th of identification high temperature hotspot ₁, the bright temperature value T of middle infrared channel _itemperature value T bright with backdrop pels _iBdifference sentence know threshold value Th ₂, fire point pixel mid and far infrared Channels Brightness Temperature increment Delta T _ijwith backdrop pels mid and far infrared Channels Brightness Temperature increment Delta T _ijBdifference sentence know threshold value Th ₃) ask for, ask for step as follows:

1. Selection experiment satellite;

2. area is selected to be not less than 1000m ²outdoor ward;

3. select seasonal conditions, weather condition, time conditions, track azimuth condions as required, and get out ground surveillance and measurement mechanism;

4. take faggot as comburant, lay the square scene of a fire at center, place, the described scene of a fire length of side should be not less than test satellite under same test condition and find the critical length of side L in the scene of a fire ₀, record scene of a fire coordinate simultaneously;

5. within 1 minute before test satellite passes by, the scene of a fire is lighted;

6. when satellite passes by, Real Time Observation satellite Quick view images;

7. pre-service complete after, ask for the bright temperature value T of infrared channel in fire point pixel _i, far infrared Channels Brightness Temperature value T _jand the bright temperature value T of middle infrared channel of 8 backdrop pels _iB, far infrared Channels Brightness Temperature value T _jB, and calculate T thus _iwith 8 backdrop pels T _ibthe minimum value Th of difference and middle infrared channel and far infrared Channels Brightness Temperature increment Delta T _ij, infrared channel and far infrared Channels Brightness Temperature increment Delta T in backdrop pels _ijB, Δ T _ijwith Δ T _ijBthe minimum value Th ' of difference.

Th＝Min(T _i-T _iBr)

In formula, T _ifor the bright temperature value of infrared channel in fire point pixel; T _iBrbe the bright temperature value of r backdrop pels, r=1,2 ..., 8; Th is T _iwith 8 backdrop pels T _iBthe minimum value of difference.

ΔT _ij＝T _i-T _j

In formula, T _jfor fire point pixel far infrared Channels Brightness Temperature value; Δ T _ijfor infrared channel and far infrared Channels Brightness Temperature increment in fire point pixel.

ΔT _ijB＝T _iB-T _jB

In formula, T _iBfor the bright temperature value of infrared channel in backdrop pels; T _jBfor backdrop pels far infrared Channels Brightness Temperature value; Δ T _ijBfor infrared channel in backdrop pels and far infrared Channels Brightness Temperature increment difference.

Th′＝Min(ΔT _ij-ΔT _ijBr)

In formula, Δ T _ijBrbe infrared with far infrared bright temperature increment difference in r backdrop pels, r=1,2 ..., 8; Th ' is Δ T _ijwith Δ T _ijBthe minimum value of difference.

8. repeat step 4. ~ 7. N time, remember s (s=1,2 ..., N) secondary repetition time, in the fire point pixel 7. obtained by step, the bright temperature value of infrared channel is T _is, ask for T in N revision test _imean value namely can be used as the threshold value Th that 3. step identifies high temperature hotspot under selected condition ₁:

${\mathrm{Th}}_1=\underset{s=1}{\overset{N}{\mathrm{\Σ}}}{T}_{\mathrm{is}}/N$

In formula, T _isbe the T that the s time revision test records _ivalue, s=1,2 ..., N;

Namely the arithmetic mean asking for Th in N test can be used as the bright temperature value T of middle infrared channel _itemperature value T bright with backdrop pels _iBdifference sentence know threshold value Th ₂:

${\mathrm{Th}}_2=\underset{s=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{Th}}_s/N$

In formula, Th _sbe the Th value that the s time revision test records, s=1,2 ..., N;

Namely the arithmetic mean asking for Th ' in N test can be used as fire point pixel mid and far infrared Channels Brightness Temperature increment Delta T _ijwith backdrop pels mid and far infrared Channels Brightness Temperature increment Delta T _ijBdifference sentence know threshold value Th ₃:

${\mathrm{Th}}_3=\underset{s=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{Th}}_s^{\′}/N$

In formula, Th ' _sbe the Th ' value that the s time revision test records, s=1,2 ..., N.

Beneficial effect of the present invention is: the present invention can detect the sensitivity of transmission line forest fire monitoring system under the conditions such as different meteorology, regions and the undistorted scope that accepts, and transmission line forest fire monitoring system fire point under the conditions such as different meteorology, regions can be asked for and sentence the threshold value known and be suitable for, basic test data can be provided for satellite monitoring transmission line forest fire technology; Important directive significance is had to the operation of transmission line forest fire monitoring system and the raising of precision.

Embodiment

Below in conjunction with drawings and Examples, the present invention is further illustrated.

In order to make, test figure is comprehensive, system, and the monitoring situation of transmission line forest fire under various condition can be reflected strictly according to the facts, safety simultaneously in warranty test process, test condition required for the present invention is following a) ~ h), wherein, condition is a), f), g), h) necessary requirement; Condition b) ~ e) be optional condition.

A), test site.Described test site should be area and is not less than 1000m ²outdoor ward.

B), seasonal conditions.According to testing requirements, select from the spring and autumn of torridity summer, Cold Winter, pleasant Climate.

C), weather condition.Be divided into weather cloudy, cloudy between ceiling unlimited, fine day.

D), time conditions.Be divided into daytime (6:00 ~ 17:00), night (20:00 ~ 23:00).

E), rail conditions.For same test satellite, select the different elevations angle, top excessively, to check the spatial dimension that can receive satellite.

F), burning things which may cause a fire disaster requirement.For making test approaching to reality transmission line forest fire more, use firewood fire as burning things which may cause a fire disaster, comburant height is no more than 2 meters, and flame height is 2 ~ 3 meters.

G), scene of a fire requirement.The scene of a fire is set to square, to facilitate mark and areal calculation; When using multiple scene of a fire, answer queueing discipline each other, to distinguish the different scene of a fire from satellite monitoring image simultaneously.

H), other requirements.When satellite passes by, should there be the equipment in the shooting scene of a fire on ground, as conditions permit, can use Aerial photography device.

Content of the test of the present invention comprises satellite monitoring sensitivity, critical mistake is pushed up the elevation angle and sentence asking for of knowledge threshold value.

1) sensitivity of MODIS satellite under summer, daytime, fair weather, the excessively elevation angle, top are 90 ° of conditions is asked for.Comprise following concrete steps:

1. select to carry the scopic TERRA satellite of MODIS as test satellite;

2. area is selected to be not less than 1000m ²outdoor ward;

3. at daytime, select TERRA satellite the to cross track that passes by that the elevation angle, top is 90 ° in sunny summer, and ground surveillance and measurement mechanism is got out;

4. be comburant with faggot, lay the square scene of a fire of length of side L=25 rice at center, place, the scene of a fire and place Edge Distance must not be less than 10 meters; Comburant height is no more than 2 meters, should without other comburants except comburant is laid in test in place; Record scene of a fire coordinate;

5. within 1 minute before satellite passes by, the scene of a fire is lighted;

6. when satellite passes by, Real Time Observation satellite Quick view images;

7. pre-service complete after carry out fire point immediately and sentence knowledge, can observe satellites find to test the scene of a fire, if can, then return step 4., make L=L-5, wait for that test satellite passes by again, repeat fire point and sentence knowledge; If can not, then return step 4., make L=L+5, wait for that test satellite passes by again, repeat fire point and sentence knowledge; Until find test satellite to find, the critical edge in the scene of a fire is grown up little L ₀, then L ₀ ²be the sensitivity of MODIS satellite under summer, daytime, fair weather, the excessively elevation angle, top are 90 ° of conditions.

The receivable satellite orbit of monitoring system receiving trap is crossed top angle of elevation alpha scope and is about between-20 ° ~ 20 °, if but α is too small, the picture of reception by distortion, to fire point sentence know effect very undesirable, the fire point even had will can't find.For this reason, this test can find out this critical top angle of elevation alpha excessively ₀, made the elevation angle, top be in-α ₀~ α ₀indirectly satellite can not affect reception.

2) the critical excessively top elevation angle of FY-3 satellite under summer, daytime, fair weather condition is asked for.

1. select to carry the scopic FY-3 satellite of MODIS as test satellite;

2. area is selected to be not less than 1000m ²outdoor ward;

3. sunny summer daytime, select FY-3 satellite to cross the track that passes by of angle of elevation alpha=50, top °, and get out ground surveillance device;

4. take faggot as comburant, lay the square scene of a fire at center, place, the described scene of a fire length of side should be the findable critical scene of a fire length of side L of the test satellite under similarity condition recorded ₀, comburant height is no more than 2 meters, should without other comburants except comburant is laid in test in place.Record scene of a fire coordinate simultaneously;

5. within 1 minute before satellite passes by, the scene of a fire is lighted;

6. when satellite passes by, Real Time Observation satellite Quick view images, register system pre-service spended time;

7. pre-service complete after carry out fire point immediately and sentence knowledge, can observe satellites find to test the scene of a fire, if can, then return step 4., make α=α-5, wait for that test satellite passes by again, repeat fire point and sentence knowledge; If can not, then return step 4., make α=α+5, wait for that test satellite passes by again, repeat fire point and sentence knowledge; Until find the critical excessively top angle of elevation alpha of FY-3 satellite under summer, daytime, fair weather condition ₀.

Satellite monitoring system be by the bright temperature value of middle infrared channel and focus pixel and around between 8 backdrop pels the difference of bright temperature value sentence and know fire and put.Therefore, the threshold value T sentencing and know focus pixel is found out _f0and the difference of bright temperature value and threshold value T between focus pixel and its backdrop pels _b0sentence the key knowing fire point, and different seasons, weather and regional condition lower threshold value difference to some extent, the threshold value under adopting this test can find out specified requirements.

3) asking for of knowledge threshold value is sentenced.

3) ask for the fire point of NOAA satellite under winter, night, fair weather condition and sentence knowledge threshold value Th ₁~ Th ₃.

Step 1. ~ 2. with embodiment 1;

3. sunny winter night, select NOAA satellite to cross the track that passes by of angle of elevation alpha=90, top °, and get out ground surveillance device;

4. take faggot as comburant, lay the square scene of a fire at center, place, the described scene of a fire length of side should be the findable critical scene of a fire length of side L of test satellite under similarity condition recorded by test (2.1) ₀.Comburant height is no more than 2 meters, should without other comburants except comburant is laid in test in place.Record scene of a fire coordinate simultaneously;

Step 5. ~ 6. with embodiment 1 5. ~ 6.;

7. pre-service complete after, the bright temperature value T of infrared channel in record fire point pixel _i, far infrared Channels Brightness Temperature value T _jand the bright temperature value T of middle infrared channel of 8 backdrop pels _iB, far infrared Channels Brightness Temperature value T _jB, and calculate T thus _iwith 8 backdrop pels T _ibthe minimum value Th of difference and middle infrared channel and far infrared Channels Brightness Temperature increment Delta T _ij, infrared channel and far infrared Channels Brightness Temperature increment Delta T in backdrop pels _ijB, Δ T _ijwith Δ T _ijBthe minimum value Th ' of difference:

Th＝Min(T _i-T _iBr) (4)

ΔT _ij＝T _i-T _j (5)

ΔT _ijB＝T _iB-T _jB (6)

Th′＝Min(ΔT _ij-ΔT _ijBr) (7)

4. ~ 7. 5 time 8. repeat step, remember s (s=1,2 ..., 5) secondary repetition time, in the fire point pixel 7. obtained by step, the bright temperature value of infrared channel is T _is, ask for T in 5 revision tests _imean value namely can be used as the threshold value Th that NOAA satellite identifies high temperature hotspot under step 3. selected condition ₁:

${\mathrm{Th}}_1=\underset{s=1}{\overset{5}{\mathrm{\Σ}}}{T}_{\mathrm{is}}/5---\left(8\right)$

Ask for the arithmetic mean Th of Th in 5 tests ₂namely can be used as the bright temperature value T of middle infrared channel _itemperature value T bright with backdrop pels _iBdifference sentence knowledge threshold value:

${\mathrm{Th}}_2=\underset{s=1}{\overset{5}{\mathrm{\Σ}}}{\mathrm{Th}}_s/5---\left(9\right)$

Ask for the arithmetic mean Th of Th ' in 5 tests ₃namely can be used as fire point pixel mid and far infrared Channels Brightness Temperature increment Delta T _ijwith backdrop pels mid and far infrared Channels Brightness Temperature increment Delta T _ijBdifference sentence knowledge threshold value:

${\mathrm{Th}}_3=\underset{s=1}{\overset{5}{\mathrm{\Σ}}}{\mathrm{Th}}_s^{\′}/5---\left(10\right).$

Claims (7)

1. a transmission line forest fire satellite monitoring system monitoring test method, comprises asking for of satellite monitoring sensitivity, asks for step as follows:

1. Selection experiment satellite;

2. area is selected to be not less than 1000m ²outdoor ward;

3. select seasonal conditions, weather condition, time conditions, track azimuth condions as required, and get out ground surveillance and measurement mechanism;

4. be comburant with faggot, lay the square scene of a fire that the length of side is L at center, place, record scene of a fire coordinate;

5. within 1 minute before test satellite passes by, the scene of a fire is lighted;

6. when satellite passes by, Real Time Observation satellite Quick view images;

7. pre-service complete after carry out fire point immediately and sentence knowledge, can observe satellites find to test the scene of a fire, if can, then return step 4., make L=L-5, wait for that test satellite passes by again, repeat fire point and sentence knowledge; If can not, then return step 4., make L=L+5, wait for that test satellite passes by again, repeat fire point and sentence knowledge; Until find test satellite to find, the critical edge in the scene of a fire is grown up little L ₀, then L ₀ ²be the sensitivity of test satellite under by step 3. selected condition.

2. transmission line forest fire satellite monitoring system monitoring test method as claimed in claim 1, it is characterized in that: described step 3. in, seasonal conditions is divided into spring, summer, autumn, the four seasons in winter, weather condition is divided into cloudy between ceiling unlimited, fine day, cloudy, time conditions is divided into day and night, rail conditions be Selection experiment satellite different cross the elevation angle, top.

3. transmission line forest fire satellite monitoring system monitoring test method as claimed in claim 2, is characterized in that: described step 4. in, the scene of a fire and place Edge Distance are not less than 10 meters; Comburant height is no more than 2 meters, lays except comburant without other comburants in place except testing.

4. transmission line forest fire satellite monitoring system monitoring test method as claimed in claim 3, is characterized in that: also comprise critical mistake and push up asking for of the elevation angle, ask for step as follows:

1. Selection experiment satellite;

2. area is selected to be not less than 1000m ²outdoor ward;

3. select seasonal conditions, weather condition, time conditions as required, and get out ground surveillance device;

4. take faggot as comburant, lay the square scene of a fire at center, place, the described scene of a fire length of side should be not less than test satellite under same test condition and find the critical length of side L in the scene of a fire ₀, record scene of a fire coordinate simultaneously;

5. selected to push up the track that passes by that the elevation angle is α;

6. within 1 minute before test satellite passes by, the scene of a fire is lighted;

7. when satellite passes by, Real Time Observation satellite Quick view images;

8. pre-service complete after carry out fire point immediately and sentence knowledge, can observe satellites find to test the scene of a fire, if can, then return step 5., make α=α-5, wait for that test satellite passes by again, repeat fire point and sentence knowledge; If can not, then return step 5., make α=α+5, wait for that test satellite passes by again, repeat fire point and sentence knowledge; Until find satellite to find, the critical of the scene of a fire crosses top angle of elevation alpha ₀, α ₀be step 3. under selected condition the critical of monitoring system acceptance test satellite orbit cross the elevation angle, top.

5. transmission line forest fire satellite monitoring system monitoring test method as claimed in claim 3, is characterized in that: also comprise sentencing and know threshold value (the threshold value Th of identification high temperature hotspot ₁, the bright temperature value T of middle infrared channel _itemperature value T bright with backdrop pels _iBdifference sentence know threshold value Th ₂, fire point pixel mid and far infrared Channels Brightness Temperature increment Delta T _ijwith backdrop pels mid and far infrared Channels Brightness Temperature increment Delta T _ijBdifference sentence know threshold value Th ₃) ask for, ask for step as follows:

1. Selection experiment satellite;

2. area is selected to be not less than 1000m ²outdoor ward;

3. select seasonal conditions, weather condition, time conditions, track azimuth condions as required, and get out ground surveillance device;

4. take faggot as comburant, lay the square scene of a fire at center, place, the described scene of a fire length of side should be not less than test satellite under same test condition and find the critical length of side L in the scene of a fire ₀, record scene of a fire coordinate simultaneously;

5. within 1 minute before test satellite passes by, the scene of a fire is lighted;

6. when satellite passes by, Real Time Observation satellite Quick view images;

7. pre-service complete after, the bright temperature value T of infrared channel in record fire point pixel _i, far infrared Channels Brightness Temperature value T _jand the bright temperature value T of middle infrared channel of 8 backdrop pels _iB, far infrared Channels Brightness Temperature value T _jB, and calculate T thus _iwith 8 backdrop pels T _ibthe minimum value Th of difference and middle infrared channel and far infrared Channels Brightness Temperature increment Delta T _ij, infrared channel and far infrared Channels Brightness Temperature increment Delta T in backdrop pels _ijB, Δ T _ijwith Δ T _ijBthe minimum value Th ' of difference.

8. repeat step 4. ~ 7. N time, remember s (s=1,2 ..., N) secondary repetition time, in the fire point pixel 7. obtained by step, the bright temperature value of infrared channel is T _is, ask for T in N revision test _imean value namely can be used as the threshold value Th that 3. step identifies high temperature hotspot under selected condition ₁; Namely the arithmetic mean asking for Th in N test can be used as the bright temperature value T of middle infrared channel _itemperature value T bright with backdrop pels _iBdifference sentence know threshold value Th ₂; Namely the arithmetic mean asking for Th ' in N test can be used as fire point pixel mid and far infrared Channels Brightness Temperature increment Delta T _ijwith backdrop pels mid and far infrared Channels Brightness Temperature increment Delta T _ijBdifference sentence know threshold value Th ₃.

6. transmission line forest fire satellite monitoring system monitoring test method as claimed in claim 5, is characterized in that: sentence know threshold value ask for step 7. in,

Th＝Min(T _i-T _iBr)

In formula, T _ifor the bright temperature value of infrared channel in fire point pixel; T _iBrbe the bright temperature value of r backdrop pels, r=1,2 ..., 8; Th is T _iwith 8 backdrop pels T _iBthe minimum value of difference.

ΔT _ij＝T _i-T _j

In formula, T _jfor fire point pixel far infrared Channels Brightness Temperature value; Δ T _ijfor infrared channel and far infrared Channels Brightness Temperature increment in fire point pixel.

ΔT _ijB＝T _iB-T _jB

In formula, T _iBfor the bright temperature value of infrared channel in backdrop pels; T _jBfor backdrop pels far infrared Channels Brightness Temperature value; Δ T _ijBfor infrared channel in backdrop pels and far infrared Channels Brightness Temperature increment difference.

Th′＝Min(ΔT _ij-ΔT _ijBr)

In formula, Δ T _ijBrbe infrared with far infrared bright temperature increment difference in r backdrop pels, r=1,2 ..., 8; Th ' is Δ T _ijwith Δ T _ijBthe minimum value of difference.

7. transmission line forest fire satellite monitoring system monitoring test method as claimed in claim 5, is characterized in that: sentence know threshold value ask for step 8. in,

In formula, Th ₁for identifying the threshold value of high temperature hotspot; Th ₂for the bright temperature value T of middle infrared channel _itemperature value T bright with backdrop pels _iBdifference sentence knowledge threshold value; Th ₃for fire point pixel mid and far infrared Channels Brightness Temperature increment Delta T _ijwith backdrop pels mid and far infrared Channels Brightness Temperature increment Delta T _ijBdifference sentence knowledge threshold value; T _isbe the T that the s time revision test records _ivalue; h _sit is the Th value that the s time revision test records; Th ' _sit is the Th ' value that the s time revision test records; S=1,2 ..., N.