Radiative transfer for atmospheric correction
Radiative transfer models describe how light passes through the atmosphere so that surface reflectance can be retrieved from top-of-atmosphere signals.
GCRI · 空间与地球观测
Physics explains how satellite sensors measure the Earth: radiative transfer through the atmosphere, microwave scattering, thermal emission and orbital mechanics. In this field it grounds retrieval algorithms and their uncertainties.
Physics studies matter, energy and their interactions, from fundamental particles to large-scale 系统. It provides the governing equations used across hazard modelling, sensing and engineering. In space and Earth observation and climate and hazards, physical principles constrain hazard models, sensor design and engineering limits. They help distinguish physically plausible scenarios from implausible ones. The canonical description is on STEM Commons.
Radiative transfer models describe how light passes through the atmosphere so that surface reflectance can be retrieved from top-of-atmosphere signals.
Physical models of radar scattering relate measured backscatter to soil moisture, vegetation structure and surface roughness.
Orbital mechanics and tracking data determine precise satellite positions for image geolocation and for collision assessment.
Land cover, night lights and vegetation over the Arctic, from NASA GIBS. Each layer carries its own date.
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NASA GIBS / EOSDIS · ASTER GDEM (METI, NASA) · Blue Marble (NASA) · © OpenStreetMap贡献者 (ODbL) · Natural Earth
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地球观测,以北极为取景。NASA 发布的卫星和模型产品,各带自己的日期。它们是指标,而非对任何地点的评估。
图层与日期
Datasets and records used by physics and quantum science on this platform, with the role each plays and the label its values carry. Sources are listed in 来源登记册.
| 数据 | 角色 | 标签 |
|---|---|---|
| Atmospheric profiles | Correction inputs | 模型生成 |
| Calibration site measurements | 验证 | 观测 |
| Tracking data | Orbit determination | 观测 |
Assembled from the Nexus Standards area profile 气候风险标准: the hazards it names, the 系统 and sectors that carry the loss, the controls that dampen it and the data that observe it. Choose the components, pick an initiating hazard and step through the cascade. The Map view places the run on an example geography with open data. Every coupling weight is a stated assumption you can change. A teaching model, not a forecast, an assessment or a certification. To model a place of your own choosing, open the full System Builder.
灾害
控制措施
NS-0 章程与原则NS-1 维持社会运转的 UNI 与制品目录(语法 v0.2:领域、部门、区域和环境分段)NS-3 风险记录 UNI(语法、旧编码对照、分配机构)NS-3b 数据集与产品元数据规范(STAC、DCAT、PROV-O)NS-9 情境 UNI(部署、实例、计划实例)NS-11 验证与监测(证据、证明、零信任符合性观测)NS-14 符合性及与外部标准的对照NRS-H65 危害类别:超越行星边界(NHS-1 planet.boundary)NRS-H62 危害类别:复合与多危害事件(NHS-1 sys.compound)NRS-H71 危害类别:深时与宇宙灾难(NHS-1 planet.deep-time)NRS-H79 危害类别:精神卫生危机(NHS-1 health.mental)NRS-H75 危害类别:气候敏感性疾病(NHS-1 health.climate-sensitive)NRS-H7 危害类别:大尺度环流异常(NHS-1 atmo.climate-mode)观测
示例地理范围
Theories are tested by reproducible experiments and precise measurement. Numerical codes are verified against analytical solutions and benchmark problems.
| 核查 | 如何开展 |
|---|---|
| 模型相互比较 | Retrieval models are compared on common test cases |
| Uncertainty propagation | Physical model uncertainties are propagated to products |
| Calibration site checks | Retrievals are compared with measurements at calibration sites |
Idealised models may omit friction, heterogeneity or coupling present in real systems. Scale transfer from laboratory to field introduces error.
模型、其假设、数据和不确定性,以科学家或工程师会核查的形式呈现。结构遵循已发表的方法。所取数值仅为示意,不是研究发现。
How a satellite or sensor record becomes evidence on physics of remote sensing, and where each step adds uncertainty.
Process explorer · Process
8 个步骤·4 个阶段
流程
NIST published FIPS 203, 204 and 205 on 13 August 2024; the migration steps are common practice, and the IR 8547 timeline is a draft.
Neutral outline of a published external standard or method, from its issuing body. Not a record of operation. Nexus does not perform, certify or approve any step shown. A gate or decision belongs to the party the source names.
量子技术 stewards physics and quantum science for the Consortium and reviews how it is applied across platforms.
报告 is the Consortium’s quarterly publication. What you know about this subject can become evidence, a case or a correction in the next edition, credited to you and published under CC BY 4.0 where it is your own work.
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