Sentinel-2 is an Earth observation mission from the Copernicus Programme that systematically acquires optical imagery at high spatial resolution over land and coastal waters. The mission is a constellation with two twin satellites, Sentinel-2A and Sentinel-2B; the mission supports a broad range of services and applications such as agricultural monitoring, emergencies management, land cover classification or water quality. Sentinel-2 has been developed and is being operated by ESA, the satellites were manufactured by a consortium led by Airbus DS; the Sentinel-2 mission has the following key characteristics: Multi-spectral data with 13 bands in the visible, near infrared, short wave infrared part of the spectrum Systematic global coverage of land surfaces from 56° S to 84° N, coastal waters, all of the Mediterranean Sea Revisiting every 5 days under the same viewing angles. At high latitudes, Sentinel-2 swath overlap and some regions will be observed twice or more every 5 days, but with different viewing angles.

Spatial resolution of 10 m, 20 m and 60 m 290 km field of view Free and open data policyTo achieve frequent revisits and high mission availability, two identical Sentinel-2 satellites operate together. The planned orbit is Sun synchronous at 786 km altitude, 14.3 revolutions per day, with a 10:30 a.m. descending node. This local time was selected as a compromise between minimizing cloud cover and ensuring suitable Sun illumination, it is close to the Landsat local time and matches SPOT's, allowing the combination of Sentinel-2 data with historical images to build long-term time series. The launch of the first satellite, Sentinel-2A, occurred 23 June 2015 at 01:52 UTC on a Vega launch vehicle. Sentinel-2B was launched on 7 March 2017 at 01:49 UTC aboard a Vega rocket; the Sentinel-2 satellites will each carry a single multi-spectral instrument with 13 spectral channels in the visible/near infrared and short wave infrared spectral range. Designed and built by Airbus Defense and Space in France.

It has a three-mirror anastigmat design with a focal length of about 600 mm. The mirrors are rectangular and made of silicon carbide, a similar technology to those on the Gaia mission; the system employs a shutter mechanism preventing direct illumination of the instrument by the sun. This mechanism is used in the calibration of the instrument. Due to the layout of the focal plane, spectral bands within the MSI instrument observe the surface at different times and vary between band pairs; these temporal offsets can be used to our benefit, for example to track propagating natural and man-made features such as clouds, airplanes or ocean waves. Sentinel-2 will serve a wide range of applications related to Earth's land and coastal water; the mission will provide information for agricultural and forestry practices and for helping manage food security. Satellite images will be used to determine various plant indices such as leaf area chlorophyll and water content indexes; this is important for effective yield prediction and applications related to Earth's vegetation.

As well as monitoring plant growth, Sentinel-2 can be used to map changes in land cover and to monitor the world's forests. It will provide information on pollution in lakes and coastal waters. Images of floods, volcanic eruptions and landslides contribute to disaster mapping and help humanitarian relief efforts. Examples for applications include: Monitoring land cover change for environmental monitoring Agricultural applications, such as crop monitoring and management to help food security Detailed vegetation and forest monitoring and parameter generation Observation of coastal zones Inland water monitoring Glacier monitoring, ice extent mapping, snow cover monitoring Flood mapping & management The Sentinel Monitoring web application offers an easy way to observe and analyse land changes based on archived Sentinel-2 data; the following two main products are generated by the mission: Level-1C: Top-of-atmosphere reflectances in cartographic geometry. Level-1C products are tiles of 100 km2 each one with a volume of 500 MB.

These products are radiometrically and geometrically corrected. This product can be obtained from the Copernicus Open Access Hub. Level-2A: Surface reflectances in cartographic geometry; this product is considered as the mission Analysis Ready Data, the product that can be used directly in downstream applications without the need for further processing. This product can be obtained either from the Copernicus Open Access Hub or generated by the user with the sen2cor processor from ESA's SNAP Toolbox. Additionally, the following product for expert users is available: Level-1B: Top of atmosphere radiances in sensor geometry. Level-1B is composed of granules, one granule represents the sub-image one of the 12 detectors in the across track direction, contains a given number of lines along track; each Level-1B granule has a data volume of 27 MB. Given the complexity of Level-1B products, their usage require an advanced expertise. Examples of images taken. Sentinel-2 at ESA Copernicus at ESA Sentinel-2 data sheet Sentinel-2 Mission Requirements Document

Shirley Clifford Atchley

Shirley Clifford Atchley was a British diplomat and botanist. Atchley was a translator with local rank of First Secretary in HM Diplomatic Service, HM Legation, Athens, he published on the life of Lord Byron in Greece and an account of the flora of Attica with the editorial assistance of W. B. Turrill. Atchley, Shirley Clifford. Wild Flowers of Attica. Oxford: Clarendon Press. OCLC 718341716. Dawkins, R. M.. "Reviewed Work: Wild Flowers of Attica by S. C. Atchley"; the Journal of Hellenic Studies. 59: 182–183. Doi:10.2307/626986. JSTOR 626986. Atchley, Shirley Clifford. Ο λόρδος Βύρων στην Ελλάδα. Athēna: Bagionakēs. ISBN 9789607940056. 1924 Officer of the Order of the British Empire, Local First Secretary at His Majesty's Legation at Athens 1930 Companion of the Order of St Michael and St George Translator at His Majesty's Legation at Athens Atchley married Anastasia Zersi Gerasi in 1893, they had two daughters Alexandra Ismene Atchley and Virginia Athenais Atchley. Alexandra married the diplomat Pierson Dixon, Virginia married a diplomat, Claud Russell.

Atchley died while climbing Greece. Although an experienced mountaineer he had been suffering from heart problems, this with the height of the mountain was the apparent cause. Who's Who entry

We Are (Hollywood Undead song)

"We Are" is the first official single from Hollywood Undead's third studio album Notes from the Underground and was released as the fifth track on the album. The song is sung by several members of the band. A bridge is sung by both Danny; the song is put next to the Swan Songs single Young by fans as it has similar vibes and meanings to the song. The lyrics of the song were inspired by America's Youth quoted by Johnny 3 Tears, as he continues "... I feel a full-on empathy for what kids are going to have to go through cause it doesn’t seem to be getting any better. In fact, it seems quite the opposite. It’s pretty sickening sometimes, man." The official music video was released on 10 December, directed by Shawn ‘Clown’ Crahan, the percussionist of Slipknot. The music video has various different scenes happening, such as Da Kurlzz isolated in a fenced area being ignored by the crowds walking by, Funny Man robbing a liquor store, J-Dog burning pictures of each band member in a church, Danny smashing up televisions in front of a young and frightened girl, Johnny 3 Tears aligning what appears to be cocaine into the phrase "We Are Built From Broken Parts" and Charlie Scene setting a suited man on fire.

Crahan made sure to add as many different things in the video to keep it visually interesting, as he explains in the'Behind the Scenes' video, it mentioned that the video was shot in California in what Danny describes "...the most haunted place in California...", revealed in an interview with Charlie Scene by'Linda Vista Hospital'. This music video was the first video by the band to include the latest masks - J-Dog: A white mask with two gas mask filters on the cheeks with a Dollar symbol and his eyes glow red and God's all seeing eye on his forehead. Johnny 3 Tears: Left side of his mask consists of the number 3 and his right consists of butterflies with a black background as before, but this mask has a mosaic design added. Charlie Scene: Dark grey bandanna with matt black spectacles, same as before. Funny Man: A black cloth mask with silver outlining, much like a Lucha Libre mask, on the right cheek, 3 dots, on his forehead are his initials FM. Da Kurlzz: More threatening, his left is all sad.

Danny: Mask seems more metal plated, the Latin cross on his eye has been replaced with bullets. Prior to the release of the single, a lyric video was published on Hollywood Undead's official YouTube channel on 29 October, a day before the single was released onto iTunes; the video, as well as providing the lyrics of the song, has various clip scenes of advertisements and urban landscapes, from sky scrapers to rubble. We Are was met with positive reviews, Aristdistrict giving it a 10 out of 10