GB/T 41450-2022 英文版 無人機(jī)低空遙感監(jiān)測的多傳感器一致性檢測技術(shù)規(guī)范
?GB/T 41450-2022 英文版 無人機(jī)低空遙感監(jiān)測的多傳感器一致性檢測技術(shù)規(guī)范
GB/T 41450-2022 英文版?
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Foreword
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This document is developed in accordance with the rules given in GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.
This document was proposed by the Ministry of Natural Resources of the People's Republic of China.
This document is under the jurisdiction of SAC/TC 230 National Technical Committee on Geographic Information of Standardization Administration of China.
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Technical specification of multi-sensor consistency testing for unmanned aerial vehicle (UAV) borne low altitude remote sensing monitoring
1 ?Scope
This document specifies the basic requirements, testing conditions, testing flight, radiation consistency testing, geometric consistency testing, evaluation and collation of testing results of multi-sensor consistency testing for unmanned aerial vehicle (UAV) borne low altitude remote sensing monitoring.
This document is applicable to radiation and geometric consistency testing of multi-sensor remote sensing monitoring based on fixed-wing and multi-rotor low-altitude unmanned aerial vehicles.
2 ?Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 28591-2012 Wind scale
CH/T 3004-2021 Specifications for field work of low-altitude digital aerial photogrammetry
CH/T 3005-2021 Specifications for low-altitude digital aerial photography
3 ?Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
optical remote sensing sensor
instrument that receives or records electromagnetic spectrum information reflected or radiated by an object in the visible, near-infrared, mid-infrared and thermal infrared bands of the electromagnetic spectrum
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3.2
Lidar
system that emits laser beams and receives echoes to obtain three-dimensional information of targets
[Source: GB/T 14950-2009, 4.150]
3.3
multi-sensor
integrated system consisting of lidar and optical remote sensing sensor, which collects or combines the information collected and provided by them
3.4
radiation consistency
degree of coincidence between multiple radiation measurements of a multi-sensor integrated system for the same target under the same observation conditions
Note: The main measures include reflectance correlation and relative mean error of reflectance.
3.5
geometric consistency
degree of coincidence between multiple geometric measurements of a multi-sensor integrated system for the same target under the same observation conditions
Note: The main measure is the average calibrated error.
3.6
consistency testing
technical operation to determine the degree of radiation and geometric consistency of a given multi-sensor integrated system according to a prescribed procedure
3.7
true value
actual value of the observed value of a remote sensing sensor that is theoretically objective and free of any error under certain conditions
[Source: GB/T 36296-2018, 3.3]
3.8
relative true value
value close to the true value, and the difference between it and the true value is negligible, and for a given purpose, it can be used as a substitute for the true value
[Source: GB/T 36296-2018, 3.4]
3.9
reflectance
percentage of radiation energy reflected by an object as a percentage of total radiation energy
3.10
stability
ability of an optical remote sensing sensor to maintain constant radiation properties over time
3.11
repeatability
degree of coincidence between repeated measurement results of the same item to be measured under repetitive measurement conditions
3.12
world coordinate system
absolute rectangular coordinate system fixed and immovable in the objective world
3.13
pixel coordinate system
rectangular coordinate system with the upper left corner of the image as the coordinate origin, the u-axis to the right and the v-axis down, in pixels
3.14
reprojection error
difference between the pixel coordinates of a target point of an optical remote sensing sensor and its actual measured pixel coordinates after it is projected to the pixel coordinate system according to the position and orientation conversion relationship
3.15
calibrated error
difference between the pixel coordinates of a target point of Lidar in a multi-sensor integrated system and that of a point with the same name after the target point of Lidar is projected to the pixel coordinate system according to the position and orientation conversion relationship
3.16
geometric distortion
misalignment of image point in the output image relative to their theoretical true position during target imaging
3.17
spectral flatness
characterization of variation in the spectra of radiometric target in the effective response band of remote sensing sensor
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3.18
brightness of image
brightness component of remote sensing image in HSV color space
Note: HSV: Hue, Saturation and Value.
4 ?Abbreviations
For the purposes of this document, the following abbreviations apply.
CGCS 2000: China Geodetic Coordinate System 2000
GNSS: Global Navigation Satellite System
UAV: Unmanned Aerial Vehicle
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