{"id":353341,"date":"2026-01-06T15:40:34","date_gmt":"2026-01-06T10:10:34","guid":{"rendered":"https:\/\/forumias.com\/blog\/?p=353341"},"modified":"2026-01-06T15:40:34","modified_gmt":"2026-01-06T10:10:34","slug":"remote-sensing","status":"publish","type":"post","link":"https:\/\/forumias.com\/blog\/remote-sensing\/","title":{"rendered":"Remote Sensing"},"content":{"rendered":"<p style=\"text-align: justify\"><strong>News: <\/strong>Remote sensing has transformed how scientists study the Earth, enabling them to map forests, water bodies, crops, and mineral deposits without ever setting foot on the ground.<\/p>\n<h2 style=\"text-align: justify\">About Remote Sensing<\/h2>\n<ul style=\"text-align: justify\">\n<li style=\"font-weight: 400\"><b>Meaning: <\/b><span style=\"font-weight: 400\">Remote sensing is a t<strong>echnology that allows scientists and engineers to study the earth\u2019s surface and subsurface without physical contact.<\/strong><\/span><\/li>\n<li style=\"font-weight: 400\"><b>Working Principle:<\/b><span style=\"font-weight: 400\"> It<strong> uses satellites, aircraft, and drones equipped with sensors t<\/strong>o collect information from a distance.<\/span>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">The <strong>Sun emits visible as well as invisible electromagnetic radiation s<\/strong>uch as infrared and ultraviolet light. <\/span><span style=\"font-weight: 400\">Different materials on Earth, including plants, water, soil, and rocks, reflect and absorb this energy in unique ways. <\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">These <strong>unique patterns are called spectral signatures<\/strong> and<strong> act like fingerprints for identifying materials. <\/strong><\/span><span style=\"font-weight: 400\"><strong>S<\/strong>ensors analyse reflected energy to determine the type, condition, and composition of objects on the ground.<\/span><\/li>\n<\/ul>\n<\/li>\n<li><strong>Uses of Remote Sensing Technique<\/strong>\n<ul style=\"text-align: justify\">\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\"><strong>Vegetation, forest health, and carbon mapping: <\/strong>Remote sensing <strong>can distinguish between different plant communities<\/strong> and <strong>tree species across large forest areas<\/strong>. <\/span>\n<ul style=\"text-align: justify\">\n<li><span style=\"font-weight: 400\">Scientists use the<strong> Normalised Difference Vegetation Index (NDVI)<\/strong> to assess plant health using spectral signatures. <\/span><\/li>\n<li><span style=\"font-weight: 400\"><strong>High NDVI values indicate healthy vegetation,<\/strong> while <strong>low values<\/strong> may indicate <strong>stress, disease, or lack of water<\/strong>.<\/span><\/li>\n<\/ul>\n<\/li>\n<li><strong>Mapping surface water and monitoring water quality:<\/strong> <span style=\"font-weight: 400\">Satellites use <strong>optical indexing and synthetic aperture radar (SAR)<\/strong> to map rivers, lakes, wetlands, and floods. <\/span>\n<ul style=\"text-align: justify\">\n<li><span style=\"font-weight: 400\">Water <strong>reflects visible green light <\/strong>but<strong> absorbs near-infrared and shortwave infrared radiation.<\/strong><\/span><\/li>\n<li><span style=\"font-weight: 400\">Scientists use the <strong>Normalised Difference Water Index (NDWI) to identify water bodies in satellite images<\/strong>. <\/span><\/li>\n<li><span style=\"font-weight: 400\">The <strong>Modified NDWI (MNDWI) is especially useful in urban areas<\/strong> to distinguish water from building shadows.<\/span><\/li>\n<\/ul>\n<\/li>\n<li><strong>Mineral detection and hyperspectral remote sensing: <\/strong><strong>Hyperspectral sensors <\/strong>split reflected sunlight into hundreds of narrow wavelength bands.\n<ul style=\"text-align: justify\">\n<li>These sensors <strong>generate detailed spectral signatures<\/strong> for every pixel in an image.<\/li>\n<li><strong>Hyperspectral data<\/strong> can identify specific minerals, rock types, and even nutrient deficiencies in plants.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Oil and gas exploration from space:<\/strong> <span style=\"font-weight: 400\">Oil and gas sometimes leak slowly upward through cracks in the Earth, a process known as <strong>micro-seepage<\/strong>.<\/span>\n<ul style=\"text-align: justify\">\n<li><span style=\"font-weight: 400\">This seepage alters soil chemistry and slightly stresses vegetation, causing subtle colour changes. <\/span><\/li>\n<li><strong>Satellites <\/strong>can<strong> detect <\/strong>these changes to identify potential drilling locations.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Groundwater mapping using gravity:<\/strong> Underground water increases the gravitational pull of an area.\n<ul style=\"text-align: justify\">\n<li><strong>Example<\/strong> &#8211;\u00a0<strong>NASA\u2019s GRACE mission <\/strong>measured tiny changes in gravity using two satellites flying in formation.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>News: Remote sensing has transformed how scientists study the Earth, enabling them to map forests, water bodies, crops, and mineral deposits without ever setting foot on the ground. About Remote Sensing Meaning: Remote sensing is a technology that allows scientists and engineers to study the earth\u2019s surface and subsurface without physical contact. Working Principle: It&hellip; <a class=\"more-link\" href=\"https:\/\/forumias.com\/blog\/remote-sensing\/\">Continue reading <span class=\"screen-reader-text\">Remote Sensing<\/span><\/a><\/p>\n","protected":false},"author":10366,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"footnotes":""},"categories":[1566,1738,12039],"tags":[11872,10498],"class_list":["post-353341","post","type-post","status-publish","format-standard","hentry","category-daily-factly-articles","category-science-and-technology-daily-factly-articles","category-knolls","tag-9pm-daily-factly","tag-the-hindu","entry"],"jetpack_featured_media_url":"","views":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/posts\/353341","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/users\/10366"}],"replies":[{"embeddable":true,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/comments?post=353341"}],"version-history":[{"count":0,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/posts\/353341\/revisions"}],"wp:attachment":[{"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/media?parent=353341"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/categories?post=353341"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/tags?post=353341"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}