Quartet's detections are automatic and it can make mistakes. Please double-check its findings before sharing.
Name this area
Give it a name, or dismiss to save with the default.
How to use Quartet
Quartet finds aircraft in Sentinel-2 satellite imagery — a moving plane leaves four colored dots in a line, while ground objects stay a single point. Draw an area, pick a date, and search.
1. Draw an area
Rectangle tool — click the square icon at the top-left of the map, then drag to draw. A new rectangle replaces the old one.
Up to 500,000 km². Airports and busy traffic corridors have the most aircraft.
Search bar — type a place name or coordinates ("51.47, -0.45") to jump there.
Save this area — click the bookmark icon on the drawn rectangle to store it in Saved Areas for reuse.
2. Pick a date
The calendar fills with Sentinel-2 dates for your area. Green = within your cloud limit, orange = over it.
Max cloud / Min coverage sliders filter which dates qualify.
Batch — switch to Batch and pick a start–end range to search every day with imagery in the window; tick the skip-cloud / skip-coverage boxes to drop cloudy or low-coverage days.
3. Search
Hit Search for Aircraft. It runs on the server, so you can close the tab — you'll get an email with a link, and it appears on the My Tasks page. Results load on the map when it finishes.
ADS-B (optional toggle) — cross-checks detections against historical flight tracks. Result tabs split them into Found / Missed / Unmatched (unmatched are often military or non-transponding aircraft — or false detections).
4. Read results
Zoom in and each detection shows four colored squares (the band positions) inside a box; zoom out and it collapses to a single plane icon. Sidebar cards show speed, heading, and a thumbnail — click one to zoom to it.
Confidence slider filters by ML score (default 90%). Export opens a page to download the filtered set as CSV, GeoJSON, or KML.
Copernicus ↗ on any card opens that spot in Copernicus Browser to verify it against the raw imagery.
Opacity / Gain / Gamma sliders (shown when viewing a task) adjust the imagery overlay.
Map tools
Basemap — switch between Streets, Minimal (no labels) and Satellite in the control at the map's top-right.
Measure — the ruler button draws a multi-point line and totals the distance.
Right-click the map to copy coordinates or open the spot in Copernicus Browser.
Manage & save
My Tasks — every search, organized into folders. Per row: view results, copy a link (sign-in required — not public), reopen the area to search a new date, add notes, rename, or archive (a reversible soft-delete).
Saved Areas (header menu) — bookmark an area; loading one jumps to its most recent imagery.
Imagery: Sentinel-2 L2A (ESA / Copernicus) via Element 84, Microsoft Planetary Computer, and CDSE.
Saved Areas
Upload an area
The search area is the bounding box of your shape, so an irregular outline is widened to the rectangle around it.
Detection Results
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