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About Vision-1
Launched on 16 September 2018, Vision-1 offers orthorectified products with resolution up to 87 cm in panchromatic mode and 3.48 in multispectral mode as standard.
| Orbit Altitude | 583 km |
| Orbit Type | Sun-synchronous |
| Orbit Period | 96.2 minutes |
| Orbit Inclination | 97.5° |
| Equator Crossing Time | 10:30am Ascending node |
Vision-1 Objectives
Vision-1 provides very high resolution optical products particularly suited for defence, security, urban planning, maritime and agriculture applications.
Vision-1 Instruments
This instrument is a 4-band multispectral (+PAN) VHR optical sensor
| Band Name | Spectral Band | GSD (Ground Sample Distance) at nadir | |
| Panchromatic Band | 450 - 650 nm | 0.87 m | |
| MS (Multispectral) bands in VNIR (Visible Near Infrared) | Blue | 440 - 510 nm | 3.48 m |
| Green | 510 - 590 nm | ||
| Red | 600 - 670 nm | ||
| Red | 760 - 910 nm | ||
| Data Quantization | 10 bits/pixel | ||
| Swath Width | 20.8 km at nadir | ||
| Revisit Capacity | 1 – 8 days depending on latitude | ||
| Targeting Accuracy | < 500m for nadir and non-nadir acquisitions | ||
| Geolocation accuracy of octorectified products | <12m CE90 (using GCPs placed on Airbus OneAtlas BaseMap and using the Airbus WorldDEM4Ortho Digital Elevation Model) | ||
Imagery can be acquired in three different modes:
- Strip Mode (Mono): Images are acquired in pushbroom fashion at a range of view angles up to 45° off-nadir. Acquired strips of variable length are divided into individual tiles of approximately 465 km2 (at nadir).
- Stereo Mode: currently under development, provides two co-incident image scenes acquired at opposing pitch angles of ±30° in the along-track direction.
- Area Mode: currently under development, imagery is acquired over a square footprint with almost double the natural swath of the instrument, either side of nadir in the along and across track directions and stitched together.
Two radiometric processing levels:
- The initial raw measurement performed by the satellite is converted to a radiance value (via the sensor calibration). This can then be converted to 'Top-Of-Atmosphere' (TOA) reflectance as measured from space, thus considering the reflectance measurement as filtered by the atmosphere.
- TOA reflectance may be further corrected to consider the transfer of reflected light through the atmosphere to obtain direct spectral information at the ground level. This is known as 'Bottom-Of-Atmosphere' (BOA) or 'Top-Of-Canopy' (TOC) reflectance.
Two different geometric processing levels are:
- Projected: The products is mapped onto the Earth cartographic system using a standard reference datum and projection system at a constant terrestrial altitude, relative to the reference ellipsoid. By default, the map projection system is WGS84/UTM. The image is georeferenced without the application of a Digital Elevation Model (DEM) and supplied with the RPC model file. Pansharpened are not available as projected product.
- Standard Ortho: georeferenced image in Earth geometry, including the application of a Airbus World DEM for Ortho and GCPs (using Airbus Intelligence One Atlas BaseMap as reference). The orthorectification procedure eliminates the perspective effect on the ground (excluding buildings) to restore the geometry of a vertical shot.
Data
DATA COLLECTIONS
ESA is offering for scientific research and application development, access to full archive and new acquisition data from the Vision-1 mission. This is dependent upon acceptance of a submitted proposal.
The following collection is available: