Frequently Asked Questions
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Satellite InSAR can estimate ground movement over time by comparing repeat radar images. To monitor an area responsibly, start with a baseline time series, understand data quality/uncertainty, and use expert interpretation to decide whether observed patterns are meaningful for your assets or safety context.Satellite InSAR can estimate ground movement over time by comparing repeat radar images. To monitor an area responsibly, start with a baseline time series, understand data quality/uncertainty, and use expert interpretation to decide whether observed patterns are meaningful for your assets or safety context.
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Misinterpretation can lead to unnecessary disruption or, more seriously, missed early warning signs. Common issues include ignoring uncertainty, misreading normal seasonal signals, and failing to recognise accelerating trends. For high‑consequence assets, expert review and clear decision thresholds are essential.
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Some providers primarily deliver deformation layers for users to interpret. Others include validation, contextual analysis, and decision support. For critical assets, choose a service that is transparent about uncertainty and provides expert interpretation aligned to your risk decisions.
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Ground instruments can be highly precise at specific points, while InSAR provides wide-area, repeatable coverage and long historical context. The best programs combine both: InSAR for context and targeting, ground methods for detailed local confirmation and operational monitoring.
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Yes. InSAR can help track deformation trends across tailings facilities and surrounding ground. Because consequences are high, results should be interpreted by specialists and integrated with geotechnical context and site monitoring to support safe decisions.
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Satellite monitoring reduces costs by screening large areas without installing sensors everywhere, helping teams focus inspections and engineering effort where it matters most. It can shorten investigation cycles by providing historical baselines, reduce site visits to low-risk locations, and support earlier detection of emerging issues—often cheaper to address early than late. The value is strongest when monitoring is tied to an action plan: thresholds, responsibilities, and follow-up steps. Data alone doesn’t reduce costs; risk-led interpretation and disciplined decision-making do.
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InSAR is widely used where ground movement affects safety or assets—commonly mining, oil & gas, civil infrastructure, and public-sector planning. Use cases include tailings and slope stability, subsidence/uplift, infrastructure settlement, and wide-area geohazard context.
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Update frequency depends on satellite revisit schedules and monitoring configuration. Many locations can be updated on a regular cadence; what matters most is choosing a frequency that matches how quickly risk can evolve for your assets and decisions.
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ROI is often realised through avoided disruption and better risk decisions: prioritising inspections, reducing unnecessary field work, and catching issues earlier. The value increases when monitoring outputs are translated into clear, defensible actions rather than raw maps.
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Share your asset type, location, objectives, and decision needs (e.g., early warning, planning, model validation). A specialist can recommend monitoring scope, cadence, deliverables, and how to integrate results with existing workflows.
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SkyGeo supports clients globally. For regional contacts and office details, use the Contact section or the site footer contact information to reach the appropriate team.
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Integration works best when each data source has a clear job. Satellite monitoring provides wide-area screening, long-term trends, and historical baselines; IoT sensors provide local, higher-frequency measurements at critical points. Combining them means aligning locations, timestamps, and thresholds, and agreeing escalation rules—what triggers a site inspection, what triggers additional sensing, and who owns each response. Done properly, the combination improves confidence and reduces both missed signals and false alarms.
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Speeds vary by satellite tasking, weather, and the type of data required. Radar (SAR) can be particularly useful because it can operate day/night and through cloud. In practice, the key question is: what decisions need to be made, and what level of certainty is required? Rapid response workflows work best when they are pre-defined—areas of interest, alert thresholds, and responsibilities—so analysis turns into action, not just maps. For critical assets, expert interpretation remains essential to avoid acting on misleading or incomplete signals.
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Pre-disaster, geospatial data supports risk planning: identifying vulnerable assets, understanding historical patterns, and prioritising mitigation. Post-disaster, it supports situational awareness, damage screening, and recovery planning. The difference is governance: in pre-disaster phases you set thresholds and decision rules; post-disaster you apply them under time pressure. In both cases, the value comes from turning data into defensible decisions—clear interpretations, known uncertainty, and alignment with operational priorities.
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Responders typically access satellite-derived products through established platforms and workflows managed by specialist teams and data providers. In most situations, ‘real-time’ means rapid updates rather than continuous streaming, and reliability depends on acquisition windows and processing. The operational priority is actionable clarity—knowing what has changed, where, and with what confidence. The best outcomes come from pre-arranged access, defined products, and expert interpretation to reduce confusion under pressure.
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SAR is an active radar system that does not rely on sunlight and can often see through cloud and smoke. Floodwater typically produces a distinct radar response compared to surrounding land, enabling flood extent mapping even when optical imagery is obscured. Accuracy depends on terrain, vegetation, built-up areas, and the processing approach. For decision-making—especially where consequences are significant—flood maps should be accompanied by confidence indicators and expert review rather than treated as definitive on their own.
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Historical flood mapping provides evidence of where water has spread in the past, how frequently flooding occurs, and how flood behaviour changes with land use and infrastructure. This helps refine hazard models, validate assumptions, and support risk prioritisation. The key is consistency and context—comparing like-for-like data, understanding uncertainty, and linking results to decisions such as resilience investment, asset design, and contingency planning.
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Accuracy varies by sensor type, land cover, and conditions on the ground. SAR can be very effective, but complex environments (dense vegetation, urban areas, steep terrain) can introduce ambiguity. For insurance and high-stakes decisions, satellite mapping is best used as a strong evidence layer alongside additional information such as ground reports, hydraulic models, and expert interpretation. Confidence levels and clear documentation of methodology are essential.
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Satellite altimetry can estimate water surface height, while imagery can estimate surface area. Combined with reservoir geometry (bathymetry or elevation models), these inputs can be used to approximate volume change over time. Accuracy depends on data quality and the availability of reliable reference information. For operational decisions, the value is often in trend visibility and early warning rather than perfect precision. Where decisions are high-stakes, results should be validated with in-situ measurements and expert review.
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Certain satellite products can provide proxies for sedimentation and water quality (such as turbidity indicators), but interpretation can be complex and site-dependent. These methods are useful for screening and trend monitoring across large areas, particularly where field sampling is limited. For compliance or operational decisions, satellite-derived indicators should be paired with ground truth data and expert interpretation.
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Seasonal monitoring supports planning by showing how storage levels and catchment conditions evolve across wet and dry periods. This can improve forecasting, allocation decisions, and resilience planning. The strongest benefit is decision support: identifying trends early and aligning operations with risk. Satellite monitoring is most effective when combined with operational data and clear planning thresholds.
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Optical and radar imagery can support vegetation and land-use change monitoring near rail corridors, helping identify encroachment and growth patterns that may affect operations. These methods are strongest as screening and prioritisation tools—highlighting where maintenance teams should focus attention. Clear thresholds and follow-up processes are important so the output is actionable rather than just another layer of maps.
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Pixel-based change detection compares changes in pixel values between images, which can be sensitive to noise and environmental variation. Object-based change detection groups pixels into meaningful features (like buildings, roads, or cleared areas) and assesses change at the feature level, which can improve interpretability for operational decisions. The right approach depends on the decision you’re supporting and the level of confidence required. For high-stakes contexts, results should include uncertainty and expert review.
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Automated change detection can highlight where land cover or built features are changing, supporting planning, compliance checks, and portfolio oversight. It works best when outputs are aligned to questions decision-makers ask: what changed, how significant is it, and what action should follow? Without clear governance, automated alerts can create noise. A risk-led workflow uses thresholds, validation steps, and expert interpretation to keep the signal actionable.
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‘Near real-time’ depends on satellite acquisition schedules, processing pipelines, and the type of imagery. Some workflows can generate alerts shortly after new data is available, but the important point is confidence. Fast alerts that are wrong create risk. Effective alerting balances speed with validation—clear confidence indicators, review steps for critical decisions, and escalation rules that match the consequences of acting.
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Spatial analysis brings multiple evidence layers together—ground behaviour, hazards, land use, infrastructure proximity, and constraints—to support better site selection and planning. The aim is to reduce risk upfront by identifying conditions that may affect long-term performance and compliance. The best analyses are decision-led: clear criteria, transparent assumptions, and outputs that map directly to go/no-go or prioritisation decisions.
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This is typically done by aligning datasets geographically and temporally, then analysing patterns and correlations across defined areas. The value comes from turning the combination into a decision tool—for example, assessing exposure, vulnerability, or impact. Care is needed: different data sources have different uncertainties and update cycles. Clear documentation and expert interpretation help ensure outputs are defensible and not overclaimed.
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Raw satellite data becomes business intelligence when it is interpreted within a decision framework—what question you’re answering, what thresholds matter, and what actions follow. Spatial analysis adds context, compares change over time, and translates complex signals into prioritised insights. The critical difference is moving from ‘information’ to ‘assurance’: clarity about uncertainty, traceable methods, and outputs that support operational, compliance, and risk decisions.
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Historical satellite archives provide long time-series that help identify where change has occurred, how frequently, and under what conditions. This can validate hazard assumptions, improve baselines, and strengthen models for subsidence, slope instability, or flood susceptibility. The key is careful interpretation—consistent methods, transparent uncertainty, and linking outputs to decision needs such as design standards, mitigation planning, and monitoring priorities.