SPOT 6 was launched by India's Polar Satellite Launch Vehicle on flight C21[2] at 04:23 UTC on 9 September 2012, while SPOT 7 was launched on PSLV flight C23[3] at 04:42 UTC on 30 June 2014. They form a constellation of Earth-imaging satellites designed to provide continuity of high-resolution, wide-swath data up to 2024. EADS Astrium took the decision to build this constellation in 2009 on the basis of a perceived government need for this kind of data. Spot Image, a subsidiary of Astrium, funded the satellites alone and owned the system (satellites and ground segments) at time of launch. In December 2014, SPOT 7 was sold to Azerbaijan's space agency Azercosmos, who renamed it Azersky.[5]The architecture is similar to that of the Pleiades satellites, with a centrally mounted optical instrument, a three-axis star tracker, a fibre-optic gyro (FOG) and four control moment gyros (CMGs).SPOT 6 and SPOT 7 are phased in the same orbit as Pléiades 1A and Pléiades 1B at an altitude of 694 km, forming a constellation of 2-by-2 satellites - 90° apart from one another. [6]Image product resolution:Panchromatic: 1.5 mColour merge: 1.5 mMultispectral: 6 mSpectral bands, with simultaneous panchromatic and multispectral acquisitions:Panchromatic (450 – 745 nm)Blue (450 – 525 nm)Green (530 – 590 nm)Red (625 – 695 nm)Near-infrared (760 – 890 nm)Footprint: 60 km × 60 kmResponsive satellite tasking, with six tasking plans per day, per satelliteCapacity to acquire up to 3 million km2 daily
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