{"id":31847,"date":"2025-04-08T10:13:56","date_gmt":"2025-04-08T04:43:56","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=31847"},"modified":"2025-04-16T15:17:34","modified_gmt":"2025-04-16T09:47:34","slug":"poem-4","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/poem-4\/","title":{"rendered":"POEM-4"},"content":{"rendered":"<h2>POEM-4 Latest News<\/h2>\n<p>Recently, POEM-4 re-entered the Earth&#8217;s atmosphere and impacted the Indian Ocean, as monitored by ISRO\u2019s IS4OM (System for Safe and Sustainable Space Operations Management).<\/p>\n<h2>What is POEM-4?<\/h2>\n<ul>\n<li><strong>POEM-4<\/strong>, or <strong>PSLV Orbital Experiment Module-4<\/strong>, is a <strong>space research platform developed by ISRO<\/strong> that <strong>utilizes the spent fourth stage (PS4) of the PSLV rocket<\/strong> as an <strong>orbiting experimental module<\/strong> in space.<\/li>\n<li>It is part of the <strong>SpaDeX (Space Docking Experiment) mission<\/strong> and represents the <strong>fourth deployment of the POEM series<\/strong>, following POEM-3.<\/li>\n<li><strong>POEM-4 has a three times larger payload capacity<\/strong> than its predecessor, <strong>POEM-3<\/strong>, marking a major advancement in reusing upper rocket stages for scientific research.<\/li>\n<li><strong>Total of 24 payloads<\/strong> were hosted on POEM-4: <strong>14 payloads from ISRO and 10 payloads from non-government entities (NGEs)<\/strong> including <strong>start-ups and academic institutions<\/strong><\/li>\n<li><strong>Notable payloads include<\/strong>:\n<ul>\n<li><strong>Walking Robotic Arm (RRM-TD)<\/strong>: A <strong>robotic manipulator<\/strong> capable of inchworm-like motion, aimed at enabling <strong>inspection and servicing<\/strong> tasks in space.<\/li>\n<li><strong>Debris Capture Robotic Manipulator<\/strong>: Developed by <strong>Vikram Sarabhai Space Centre (VSSC)<\/strong>, this innovation assists in <strong>space debris collection and manipulation<\/strong>, aligning with global efforts in <strong>space clean-up<\/strong>.<\/li>\n<li><strong>Gradient Control Reaction Wheel Assembly (RWA)<\/strong>: Designed by <strong>ISRO Inertial Systems Unit (IISU)<\/strong>, this system enhances <strong>attitude control<\/strong> and <strong>stabilization<\/strong> of the POEM platform using <strong>reaction wheels<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Launch and Mission Details<\/h3>\n<ul>\n<li><strong>POEM-4 was launched on December 30, 2024<\/strong>, aboard <strong>PSLV-C60<\/strong>, which also carried <strong>twin SPADEX satellites<\/strong> to a <strong>475 km altitude<\/strong>.<\/li>\n<li>After satellite deployment, the <strong>PS4 upper stage was reconfigured as POEM-4<\/strong> and continued in a <strong>nearby orbit<\/strong>, serving as an experimental platform.<\/li>\n<li>POEM-4 was then <strong>de-orbited<\/strong> by restarting its engine and brought to a <strong>circular orbit at 350 km altitude<\/strong> with a <strong>55.2\u00b0 inclination<\/strong>.<\/li>\n<li>The stage was <strong>passivated<\/strong> (leftover fuel vented) to <strong>prevent accidental break-up<\/strong> and ensure <strong>safe operations in orbit<\/strong>.<\/li>\n<\/ul>\n<h2>POEM-4 FAQs<\/h2>\n<p><strong>Q1. <\/strong>What is POEM-4?<br \/>\n<strong>Ans.<\/strong> POEM-4 (PSLV Orbital Experimental Module) refers to the use of the spent fourth stage of ISRO&#8217;s PSLV-C60 rocket as an orbital platform for conducting scientific experiments in space.<\/p>\n<p><strong>Q2.<\/strong> What were the objectives of the POEM-4 mission?<\/p>\n<p><strong>Ans.<\/strong> The mission aimed to conduct various scientific experiments, including the germination of cowpea seeds in microgravity and the operation of India&#8217;s first space robotic arm.<\/p>\n<p><strong>Q3.<\/strong><i> <\/i>When was POEM-4 launched?<\/p>\n<p><strong>Ans.<\/strong> POEM-4 was launched on December 30, 2024, as part of the Space Docking Experiment (SpaDeX) mission.\u00a0<\/p>\n<p><strong>Source: <\/strong><a href=\"https:\/\/www.thehindu.com\/sci-tech\/science\/isro-poem-4-makes-atmospheric-re-entry\/article69414284.ece\" target=\"_blank\" rel=\"nofollow noopener\">TH<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>INS Varsha is a strategically planned submarine base built to accommodate India&#8217;s nuclear-powered submarines, enhancing the country&#8217;s maritime defense capabilities.<\/p>\n","protected":false},"author":5,"featured_media":31848,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-31847","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/31847","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=31847"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/31847\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/31848"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=31847"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=31847"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=31847"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}