Stratus-3
RecommendedBest default for new cloudless Sentinel-2 L2A workflows. Same 10-band output as Stratus-2, but trained further and optimized for more efficient production.
Models & pricing
Choose the right cloudless Sentinel-2 model
Compare ClearSKY's cloudless Sentinel-2 style models by output, fit, inputs, ordering limits, and delivery timing. Start with Stratus-3 for most new production workflows, use Stratus-2-Fast when latency matters most, and treat legacy or preview models as special-case options.
Quick model guide
A fast overview before opening the detailed model specifications.
Stratus-2-Fast
Lowest latencyUse when time from order to data matters most. Landsat is optional, which can reduce turnaround when fast delivery is the priority.
Stratus-2
StableStill available for existing workflows and continuity with previous Stratus-2 deliveries. For most new customers, Stratus-3 is the better starting point.
Nimbus
On requestPreview access for full spectral or NDVI-specific workflows. Best for customers who want to discuss upcoming Nimbus capabilities directly with ClearSKY.
Sentinel-2 Data Models
Compare model status, output, fit, ordering modes, inputs, and typical delivery timing.
Output
Type
Multispectral
Format
L2A
Resolution
10 m
Bands
B2 • Blue • 490 nmB3 • Green • 560 nmB4 • Red • 665 nmB5 • Red edge 1 • 705 nmB6 • Red edge 2 • 740 nmB7 • Red edge 3 • 783 nmB8 • NIR • 842 nmB8A • Narrow NIR • 865 nm
Fit
- Best for
- New Production OrdersAgricultureTime Series
- Not ideal for
- Fastest Possible DeliverySnow Suppressed ProductsApplications Where Legacy Stratus 2 Continuity Is Required
- Strengths
- HazeThin CirrusCloud ShadowsEfficient Production
- Snow handling
- Keeps Snow
- Notes
- • Recommended default for new customers.• Same 10-band Sentinel-2 L2A output as Stratus-2.
Ordering limits
Minimum period: 1 monthUpdate frequency: 1–7 daysDelivery: 1–7 days
Polygon constraints
- AOI
- 1 km²+
- Geometry
- Polygon, MultiPolygon
Inputs
- Data types
- OpticalSAR
- Required
- Sentinel-1Sentinel-2Landsat 8/9
Overview
Stratus-3 is the recommended ClearSKY production model for cloudless Sentinel-2 L2A imagery. It follows a similar architecture to Stratus-2, but has been trained further and optimized for more efficient production. For customers, that means the same familiar 10-band Sentinel-2 L2A output with faster production workflows and lower expected latency.
Delivery notes
• Temporal revisit and delivery timing depend on input coverage, AOI, and order mode.
Output
Type
Multispectral
Format
L2A
Resolution
10 m
Bands
B2 • Blue • 490 nmB3 • Green • 560 nmB4 • Red • 665 nmB5 • Red edge 1 • 705 nmB6 • Red edge 2 • 740 nmB7 • Red edge 3 • 783 nmB8 • NIR • 842 nmB8A • Narrow NIR • 865 nm
Fit
- Best for
- Fast DeliveryNear Real Time WorkflowsOperational Monitoring
- Not ideal for
- Maximum Input ContextCustomers Prioritizing Best Quality Over SpeedOrders Where Landsat Context Is Mandatory
- Strengths
- Fast TurnaroundLow LatencyApi WorkflowsOperational Monitoring
- Snow handling
- Keeps Snow
- Notes
- • Landsat 8/9 is optional.• Using fewer inputs can reduce delivery time.
Ordering limits
Minimum period: 1 monthUpdate frequency: 1–7 daysDelivery: 30 min+
Polygon constraints
- AOI
- 1 km²+
- Geometry
- Polygon, MultiPolygon
Inputs
- Data types
- OpticalSAR
- Required
- Sentinel-1Sentinel-2
- Optional
- Landsat 8/9
Overview
Stratus-2-Fast is built for customers who care most about low latency. It uses a similar architecture to Stratus-2 and Stratus-3, but relies on less input data to reduce production time. Landsat 8/9 can be used when needed, but is optional. When Landsat is not used, delivery can often be under 30 minutes, depending on AOI size, order mode, region, and input availability.
Delivery notes
• Fast delivery depends on AOI size, order mode, region, and input availability.
• Orders without Landsat input can often be delivered in under 30 minutes.
Output
Type
Multispectral
Format
L2A
Resolution
10 m
Bands
B2 • Blue • 490 nmB3 • Green • 560 nmB4 • Red • 665 nmB5 • Red edge 1 • 705 nmB6 • Red edge 2 • 740 nmB7 • Red edge 3 • 783 nmB8 • NIR • 842 nmB8A • Narrow NIR • 865 nm
Fit
- Best for
- Existing Stratus 2 WorkflowsAgricultureTime Series
- Not ideal for
- New Default WorkflowsFastest Possible Delivery
- Strengths
- HazeThin CirrusCloud ShadowsHigh Latitude Sar Boost
- Snow handling
- Keeps Snow
- Notes
- • Use Stratus-3 for most new workflows.• SAR improves timeliness in high-latitude regions.
Ordering limits
Minimum period: 1 monthUpdate frequency: 1–7 daysDelivery: 1–7 days
Polygon constraints
- AOI
- 1 km²+
- Geometry
- Polygon, MultiPolygon
Inputs
- Data types
- OpticalSAR
- Required
- Sentinel-1Sentinel-2Landsat 8/9
Overview
Stratus-2 is the original ClearSKY production model for cloudless Sentinel-2 L2A imagery. It uses Sentinel-1, Sentinel-2, and Landsat 8/9 to produce 10-band multispectral Sentinel-2 outputs. It remains available for existing workflows and customers who require continuity with previous Stratus-2 deliveries, but Stratus-3 is recommended for most new orders.
Delivery notes
• Temporal revisit and delivery timing depend on input coverage, AOI, and order mode.
Output
Type
Multispectral
Format
L2A
Resolution
10 m
Bands
B2 • Blue • 490 nmB3 • Green • 560 nmB4 • Red • 665 nmB5 • Red edge 1 • 705 nmB6 • Red edge 2 • 740 nmB7 • Red edge 3 • 783 nmB8 • NIR • 842 nmB8A • Narrow NIR • 865 nm
Fit
- Best for
- Legacy WorkflowsExisting Customers Only
- Not ideal for
- New WorkflowsSnow ResearchCryosphere Analysis
- Strengths
- Snow SuppressionStable Time Series
- Snow handling
- Removes Snow
- Notes
- • Soon deprecated.• Do not start new workflows on this model.
Ordering limits
Minimum period: 1 monthUpdate frequency: 1–7 daysDelivery: 1–7 days
Polygon constraints
- AOI
- 1 km²+
- Geometry
- Polygon, MultiPolygon
Inputs
- Data types
- OpticalSAR
- Required
- Sentinel-1Sentinel-2Landsat 8/9
Overview
Stratus-2 (No Snow) is a legacy snow-suppression variant of Stratus-2. It was designed for users who wanted a consistent snow-free surface in regions with sporadic or transient snow. This model is planned for deprecation and should not be used for new workflows unless ClearSKY specifically recommends it for your case.
Delivery notes
• Stratus-2 (No Snow) is planned for deprecation and should not be used for new workflows unless ClearSKY specifically recommends it.
Output
Type
Multispectral
Format
BOA
Resolution
10 m
Bands
B1 • Coastal aerosol • 443 nmB2 • Blue • 490 nmB3 • Green • 560 nmB4 • Red • 665 nmB5 • Red edge 1 • 705 nmB6 • Red edge 2 • 740 nmB7 • Red edge 3 • 783 nmB8 • NIR • 842 nm
Fit
- Best for
- Full Spectral WorkflowsAdvanced Remote Sensing UsersMulti Sensor Workflows
- Not ideal for
- Standard Production OrdersCustomers Needing Fixed Public Specifications
- Strengths
- Full Spectral OutputImproved Sar Noise HandlingModular InputsMulti Sensor Workflows
- Snow handling
- TBD
- Notes
- • Available on request.• Specs subject to change while Nimbus is finalized.
Ordering limits
Minimum period: 1 monthUpdate frequency: 1–7 daysDelivery: On request
Polygon constraints
- AOI
- 1 km²+
- Geometry
- Polygon, MultiPolygon
Inputs
- Data types
- OpticalSAR
- Required
- Sentinel-1Sentinel-2
- Optional
- Landsat 8/9
Overview
Nimbus (Multispectral) is a preview model for users who need full spectral Sentinel-2 outputs and want access to ClearSKY's next-generation modular data-fusion pipeline. It is designed around more flexible input handling and improved SAR processing compared with the Stratus family. Nimbus is available on request while final production specifications, delivery options, and pricing are being finalized.
Delivery notes
• Nimbus multispectral is produced as TOA. BOA is available as an optional download format.
• Nimbus is available on request while final production specifications, delivery options, and pricing are being finalized.
Output
Type
Index
Format
NDVI
Resolution
10 m
Index
NDVI
Fit
- Best for
- Ndvi Time SeriesDashboardsVegetation Monitoring
- Not ideal for
- Applications Requiring MultispectralCustomers Needing Fixed Public Specifications
- Strengths
- Lighter DownloadsSimple WorkflowsVegetation MonitoringDashboard Ready Output
- Snow handling
- TBD
- Notes
- • Available on request.• Output is NDVI only.
Ordering limits
Minimum period: 1 monthUpdate frequency: 1–7 daysDelivery: On request
Polygon constraints
- AOI
- 1 km²+
- Geometry
- Polygon, MultiPolygon
Inputs
- Data types
- OpticalSAR
- Required
- Sentinel-1Sentinel-2
- Optional
- Landsat 8/9
Overview
Nimbus (NDVI) is a preview NDVI-only model for users who want vegetation-index time series without downloading full multispectral imagery. It is designed for lighter workflows, dashboard use cases, and monitoring pipelines where NDVI is the primary output. Nimbus (NDVI) is available on request while final production specifications, delivery options, and pricing are being finalized.
Delivery notes
• Nimbus (NDVI) delivers NDVI only. No multispectral download formats are provided.
• Nimbus (NDVI) is available on request while final production specifications, delivery options, and pricing are being finalized.
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