{"id":217976,"date":"2013-10-21T08:30:00","date_gmt":"2013-10-21T12:30:00","guid":{"rendered":"2ac93382822627840115a476efbee828"},"modified":"2013-10-21T08:30:00","modified_gmt":"2013-10-21T12:30:00","slug":"swarm-constellation-over-earth","status":"publish","type":"post","link":"https:\/\/spaceweekly.com\/?p=217976","title":{"rendered":"Swarm constellation over Earth"},"content":{"rendered":"<p>\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2013\/10\/swarm_constellation_over_earth\/13357780-1-eng-GB\/Swarm_constellation_over_Earth_small.jpg\" width=\"170\" height=\"96\" align=\"left\" hspace=\"8\" \/><\/p>\n<p>\nSwarm is ESA&#8217;s first Earth observation constellation of satellites. The three identical satellites are launched together on one rocket.&nbsp;Two satellites orbit almost side-by-side at the same altitude \u2013 initially at about 460 km, descending to around 300 km over the lifetime of the mission. The third satellite is in a higher orbit of 530 km and at a slightly different inclination. The satellites\u2019 orbits drift, resulting in the upper satellite crossing the path of the lower two at an angle of 90\u00b0 in the third year of operations.\n<\/p>\n<p>\nThe different orbits along with satellites\u2019 various instruments optimise the sampling in space and time, distinguishing between the effects of different sources and strengths of magnetism.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2013\/10\/swarm_constellation_over_earth\/13357780-1-eng-GB\/Swarm_constellation_over_Earth_small.jpg\" width=\"170\" height=\"96\" align=\"left\" hspace=\"8\" \/><\/p>\n<p>\nSwarm is ESA&#8217;s first Earth observation constellation of satellites. The three identical satellites are launched together on one rocket.&nbsp;Two satellites orbit almost side-by-side at the same altitude \u2013 initially at about 460 km, descending to around 300 km over the lifetime of the mission. The third satellite is in a higher orbit of 530 km and at a slightly different inclination. The satellites\u2019 orbits drift, resulting in the upper satellite crossing the path of the lower two at an angle of 90\u00b0 in the third year of operations.\n<\/p>\n<p>\nThe different orbits along with satellites\u2019 various instruments optimise the sampling in space and time, distinguishing between the effects of different sources and strengths of magnetism.<\/p>\n","protected":false},"author":5,"featured_media":615444,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27],"tags":[],"class_list":["post-217976","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-multimedia"],"_links":{"self":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/217976","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=217976"}],"version-history":[{"count":0,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/217976\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/media\/615444"}],"wp:attachment":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=217976"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=217976"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=217976"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}