Vision-1 Instrument

Explore the instrument used in the Vision-1 mission.

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Vision-1 DATA

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Vision-1 provides very high resolution optical products particularly suited for defence, security, urban planning, maritime and agriculture applications

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.

Vision-1 Mission Parameters
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 

Vision-1 Mission Parameters
  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 DESCRIPTION

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.

ESA will support as many high-quality and innovative European and Canadian projects as possible within the quota limit available, therefore only a limited amount of products can be made available to each project.

The following collection is available:

 
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