Sentinel-2A

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Sentinel-2A
Sentinel 2-IMG 5873-white (crop).jpg
Model of a Sentinel 2 satellite
Mission type Earth observation
Operator ESA
COSPAR ID 2015-028A
SATCAT no. 40697
Website Sentinel-2 (ESA)
Mission duration Planned: 7 years[1]
Elapsed: 3 years, 3 months, 19 days
Spacecraft properties
Spacecraft type Sentinel-2
Manufacturer Airbus Defence and Space
Launch mass 1,140 kg (2,510 lb)
Dry mass 1,017 kg (2,242 lb)
Dimensions 3.4 m × 1.8 m × 2.35 m (11.2 ft × 5.9 ft × 7.7 ft)
Power 1700 watts
Start of mission
Launch date 23 June 2015, 01:51:58 (2015-06-23UTC01:51:58) UTC[2]
Rocket Vega
Launch site Kourou SLV
Contractor Arianespace
Orbital parameters
Reference system Geocentric
Regime Low Earth
Semi-major axis 7,167.10 km (4,453.43 mi)
Eccentricity 0.000127
Perigee 788.06 km (489.68 mi)
Apogee 789.87 km (490.80 mi)
Inclination 98.5623°
Period 100.65 minutes
Epoch 9 March 2017, 21:05:23 UTC[3]
Transponders
Band S band (TT&C support)
X band and optical laser through EDRS (data acquisition)
Bandwidth 64 kbit/s upload (S band)
128 kbit/s - 2 Mbit/s down (S band)
520Mbit/s down (X band/Optical)
Instruments
Multi-Spectral Imager (MSI)

Sentinel-2A is a European optical imaging satellite launched in 2015. It is the first Sentinel-2 satellite launched as part of the European Space Agency's Copernicus Programme. The satellite carries a wide swath high-resolution multispectral imager with 13 spectral bands. It will perform terrestrial observations in support of services such as forest monitoring, land cover changes detection, and natural disaster management.[4]

Mission history[edit]

Launch[edit]

Sentinel 2A was launched by a Vega rocket on 23 June 2015 at 01:52 UTC. The satellite separated from the upper stage 54 min 43 s after liftoff.[5]

Orbital operation[edit]

The satellite captured its first image 100 hours after launch, making a 290 km wide swath from Sweden through Central Europe to Algeria.[6][7]:8 Commissioning occurred in October 2015.[7]:8

Between 20 and 23 January 2017 the spacecraft suffered a mission planning anomaly which resulted in loss of data from the Multi-Spectral Imager.[8]

References[edit]

  1. ^ "Sentinel-2: The Operational Compernicus Optical High Resolution Land Mission" (PDF). European Space Agency. 2013. Retrieved 23 June 2015.
  2. ^ "Second Copernicus environmental satellite safely in orbit". European Space Agency. 23 June 2015. Retrieved 24 June 2015.
  3. ^ "Sentinel 2A - Orbit". Heavens-Above. 9 March 2017. Retrieved 9 March 2017.
  4. ^ Justice, Adam (23 June 2015). "Sentinel-2A: Satellite blasts off to provide new, improved view of Earth". International Business Times. Retrieved 24 June 2015.
  5. ^ "Sentinel-2A satellite launched from Kourou". RT.com. In Motion. 23 June 2015. Retrieved 24 June 2015.
  6. ^ "Sentinel-2 delivers first images". European Space Agency. 29 June 2015. Retrieved 1 February 2017.
  7. ^ a b Hoersch, Bianca (2015). A short success story of Sentinel-2A (PDF). Meeting of the Earth Observation Programme Board. 22–23 September 2015. ESRIN, Frascati, Italy. Retrieved 1 February 2017.
  8. ^ "Loss of Sentinel-2A acquisitions between 20 and 23 January 2017". European Space Agency. 23 January 2017. Retrieved 1 February 2017.

External links[edit]