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Sentinel 2A & 2B

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Sentinel-2A and 2B were launched by the European VEGA launcher on 23rd June 2015 and 7th March 2017 respectively.

 

Each weighing approximately 1.2 tonnes, these optical satellites are identical and operate simultaneously. They are phased at 180° to each other at a mean altitude of 786km in sun-synchronous orbit. They have a lifetime of 7.25 years however can accommodate 12 years of operation.

Known as the Sentinel-2 mission these twin satellites achieve a global coverage of 10m, 20m and 60m spatial resolution imagery. The dual-frequency receiver, known as the Global Navigation Satellite System (GNSS) helps keep the position of each satellite in orbit with a dedicated propulsion system for orbital accuracy. 

They have 13 bands available in VNIR (Visible and Near-Infra-Red) and SWIR (Short Wave Infra-Red) with a 290km swath width. These are the two focal plane assemblies within the passive multi-spectral instrument (MSI). This instrument collects and allows for incoming light beams to split, separately by stripe filters positioned on top of the detectors.

Features and Benefits

  • Multispectral data with 13 bands.
  • Systemic global coverage of land surfaces and coastal waters.
  • Revisits every 5 days (combined constellation). 
  • Has a large swatch width of 290km at nadir.

Technical Specifications

Specification

Details

Satellites

2

Orbit

Sun-synchronous

> Altitude

786km

Mission Lifetime

>7 years

Spatial Resolution

4 at 10m

6 at 20m

3 at 60m

Accuracy

< 5m CE90 at nadir

Spectral Bands

Band 1-Coastal Aerosol: 442.7nm

Band 2-Blue: 492.4nm

Band 3-Green: 559.8nm

Band 4-Red: 664.6nm

Band 5-Vegetation red edge: 704.1nm

Band 6-Vegetation red edge: 740.5nm

Band 7-Vegetation red edge: 782.8nm

Band 8-NIR: 832.8nm

Band 8A-Narrow NIR: 864.7nm

Band 9-Water vapour: 945.1nm

Band 10-SWIR Cirrus: 1373.5nm

Band 11-SWIR: 1613.7nm

Band 12-SWIR: 2202.4nm

Stereo Available

No

Bit Depth:

12 bit

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