Abstract
The Sentinel-2 satellites in the Copernicus program provide high resolution multispectral images, which are recorded with temporal offsets up to 2.6 s. Moving aircrafts and ships are therefore observed at different positions due to the multispectral band offsets, from which velocities can be determined. We describe an algorithm for detecting aircrafts and ships, and determining their speed, heading, position, length, etc. Aircraft velocities are also affected by the parallax effect and jet streams, and we show how the altitude and the jet stream speed can be determined from the geometry of the aircraft and/or contrail heading. Ship speeds are more difficult to determine as wakes affect the average ship positions differently in the various multispectral bands, and more advanced corrections methods are shown to improve the velocity determination.
| Original language | English |
|---|---|
| Article number | 2873 |
| Journal | Sensors |
| Volume | 19 |
| Issue number | 13 |
| Number of pages | 14 |
| ISSN | 1424-8220 |
| DOIs | |
| Publication status | Published - 2019 |
Bibliographical note
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).Keywords
- Sentinel-2
- Aircraft
- Altitude
- Jet stream
- Multispectral
- Parallax
- Ship
- Temporal offsets
- Velocity