GCRI · Ezman û Çavdêriya Erdê
Methods and uncertainty
The methods Space and Earth Observation relies on: their equations and assumptions, the data they need, how they are validated and the limits of what they can show.
Methods and uncertainty in five parts.
The methods in use.
- 01Çavdêriya Erdê û hestkirina ji dûrChoosing sensors for a question · Change detection over time · Validating derived productsApplied here
- 02Pergalên fezayê û xizmetên peykîMission continuity analysis · Space segment resilience · Debris compliance assessmentApplied here
- 03Pergalên agahiya erdnîgarîIntegrating EO with administrative data · Catalogues and interoperabilityApplied here
- 04Statîstîka cihî û jeostatîstîkArea estimation with error-adjusted counts · Stratified sampling designApplied here
- 05Komputerkirina bi performansa bilind, ewr û kenarAnalysis next to the archive · Reproducible processing chains · National data cubesApplied here
- 06Teknolojiya ragihandin û torêData distribution to users · Spectrum protection for EO · Ground station networksApplied here
- 07Fîzîk û zanista kuantûmêRadiative transfer for atmospheric correction · Microwave scattering · Orbit determinationApplied here
Each method, its role in this field and how it is checked.
- Çavdêriya ErdêRole hereEarth observation and remote sensing is the technology this platform stewards for the network.Checks appliedAccuracy with intervals; Sensor consistency; Independent reference
- Pergalên fezayêRole hereSpace systems and satellite services is the second technology this platform stewards.Checks appliedStatus verification; Guideline mapping; Scenario coverage
- GeospatialRole hereGeospatial information systems manage location data and combine Earth observation with maps of people, assets and boundaries.Checks appliedBoundary version control; Standards validation; Positional checks
- Spatial statisticsRole hereSpatial statistics give Earth observation its quantitative rigour: sampling designs for accuracy assessment, unbiased area estimation, spatial interpolation and models that combine satellite data with ground observations, each reported with its uncertainty.Checks appliedDesign-based inference; Interval reporting; Spatial cross-validation
- ComputingRole hereHigh-performance and cloud computing let Earth observation scale from single images to petabyte archives.Checks appliedVersion recording; Regeneration test; Cost accounting
- RagihandinRole hereCommunications technology links satellites to ground and users to services.Checks appliedLatency measurement; Interference flagging; User access testing
- PhysicsRole herePhysics explains how satellite sensors measure the Earth: radiative transfer through the atmosphere, microwave scattering, thermal emission and orbital mechanics.Checks appliedModel intercomparison; Uncertainty propagation; Calibration site checks
Pêvajo çawa dimeşe.
Process explorer · Process
Methods and uncertainty: Source to evidence record
10 steps·4 qonax·2 derî
Pêvajo
Methods and uncertainty: Source to evidence record
A source is registered and assessed, its record labelled and classified, and a Digital Evidence Passport carries provenance; a correction reaches every dependent record.
01 Intake
- 01Identify the sourceSource · The source stewardDiscovery is not ingestion. Source identification records the source class, steward, institutional role and jurisdiction.
- 03Register the sourceGavRegistration makes a discovered source a governed participant in the evidence lifecycle. It implies no endorsement or certification.
02 Assessment
- 04Jurisdiction and rights classificationDerîRights classification identifies licence, consent, confidentiality and reuse limits. The result determines access and routing.
- 05Evidence quality assessmentGavQuality assessment decides whether a record is fit for a defined use. Quality is multidimensional and never a single score.
- 06Evidence labelGavEvery finding carries one of nine evidence labels. Missing data is shown as missing, never as zero.
03 Record
- 07Evidence classificationTomarClassification gives records lifecycle states, such as source-verified, public-safe or restricted. States can coexist and set evidence use.
- 08Source release and identifierTomar · NXS-GRX (canonical data, provenance and risk)A source release records rights, temporal coverage and source lineage. A UNI is allocated through a catalogue and never typed by hand.
- 09Digital Evidence PassportTomarThe passport records provenance, quality, rights, jurisdiction, permitted use and history, so evidence keeps its context when it travels.
04 Use and correction
- 02Correction reaches dependent recordsStep · NXS-GRX (canonical data, provenance and risk)A source correction propagates to dependent cuts and products without rewriting old results.
- 10Nirxandina ewle ya giştîDerîPublic-safe review decides whether a record can be shared publicly. It is a distinct stage and is not validation.
Data protocols: evidence lifecycle · Data protocols: core data objects and evidence records · The Global Risks Index (NXS-GRX)Designed programme process, not a record of operation. No cycle has run and every programme is at service level R0. A gate is a programme decision, never a public-authority approval, certification or deployment authorisation. The data-protocol pages describe a design, not a running system.
Where uncertainty in Earth observation analysis comes from, and how it is shown.
| Çavkanî | Why it matters here | How it is reported |
|---|---|---|
| Classification accuracy | Varies with region, season and class | Accuracy assessments per product |
| Revisit and cloud | Limit what fast events are seen | Observation dates stated |
| Geolocation | Errors matter for small features | Accuracy stated |
| Sensor continuity | Missions end; records break | Record continuity noted |
Every derived map states sensor, date and accuracy.
How uncertainty is reported.
- 01
State assumptions
Each analysis lists its assumptions and the data it depends on.
- 02
Quantify where possible
Ranges and confidence are reported alongside central estimates.
- 03
Validate and compare
Models are checked against observations and, where possible, against other models.
- 04
Publish limits
What an analysis cannot show is stated beside what it can.
Where this page’s references lead.
Sazî û belgeyên ku ev rûpel li hember wan tê xwendin. Rewş û çap diguherin; her girêdan diçe ba saziya derxistinê.
Pirs û bersiv.
Are the methods open?
Ji vê rûpelê delîl bidin.
rêzeya Pergalên Stratejîk 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.
- E-nameDergeh GW-GCRIJi vê rûpelê bişîninDelîl, rastkirin, doz, rêbaz, nirxandin, wergerandin an têketina profîlê. Bi nîşana vê rûpelê digihîje, ji ber vê yekê edîtorê xwediyê wê wê bistîne.
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- rêzeya Pergalên StratejîkGCRIHemû rêyên beşdariyê bibîneCureyên beşdariyê, her yek çawa tê nirxandin, tu çi navlêkirinê distînî, lîsans û tiştê ku qet nayê qebûlkirin.
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Rêbazek, danehevek an pirsek bîne.
Agahî û pirs îro vekirî ne. Pirsek referansekê distîne û gava piştî wê dide nasîn; serlêdan, drav, veqetandina hesabkirinê û tomarkirin tenê dema ku tîm, mercên wê û kapasîteya vekolînê hebin vedibin.
Belgeyên hiqûqî.
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