{"id":267,"date":"2021-05-11T14:00:51","date_gmt":"2021-05-11T12:00:51","guid":{"rendered":"https:\/\/eidel.no\/en\/?post_type=product&#038;p=267"},"modified":"2025-01-30T09:23:22","modified_gmt":"2025-01-30T08:23:22","slug":"multi-needle-langmuir-probe","status":"publish","type":"product","link":"https:\/\/eidel.no\/en\/product\/multi-needle-langmuir-probe\/","title":{"rendered":"m-NLP &#8211; multi-Needle Langmuir Probe"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">Overview<\/h3>\n\n\n\n<p>Space weather creates ionospheric plasma effects on satellite instruments, disturbing both communication and navigation satellites in orbit and negatively impacting airtraffic in transpolar flights. The strongest GPS-scintillations occur when plasma clouds enter the polar cap through the auroral oval on the dayside, and exits the polar cap through the auroral oval on the nightside.  <\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignleft size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"231\" height=\"354\" src=\"https:\/\/eidel.no\/en\/wp-content\/uploads\/sites\/2\/2021\/09\/m-NLP-boom-with-probes-extended-transparent-1.png\" alt=\"\" class=\"wp-image-807\" style=\"width:135px;height:207px\" srcset=\"https:\/\/eidel.no\/en\/wp-content\/uploads\/sites\/2\/2021\/09\/m-NLP-boom-with-probes-extended-transparent-1.png 231w, https:\/\/eidel.no\/en\/wp-content\/uploads\/sites\/2\/2021\/09\/m-NLP-boom-with-probes-extended-transparent-1-196x300.png 196w\" sizes=\"auto, (max-width: 231px) 100vw, 231px\" \/><figcaption class=\"wp-element-caption\">m-NLP extended on boom<\/figcaption><\/figure>\n<\/div>\n\n\n<p>The mulit-Needle Langmuir Probe (m-NLP) is an instrument for measuring electron density and spacecraft floating potential at high sampling rates in Low Earth Orbit. Obtaining meter scale resolution of electron density structures and turbulence in the ionosphere opens up entirely new possibilities for space weather forecasting, e.g., geographical distribution of expected scintillation effects and availability forecasting in the coming hours for GNSS systems.<\/p>\n\n\n\n<p>EIDEL AS has space qualified the multi-Needle Langmuir Probe (m-NLP) system for 10 years operation on satellites in Low Earth Orbit. The system is designed for high spatial resolution measurements of ionospheric electron density and spacecraft floating potential.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Background<\/h3>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignright is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/eidel.wpengine.com\/en\/wp-content\/uploads\/sites\/2\/2021\/05\/NORSAT-1-overvaaker-trafiikken_full_site-e1461165881185-300x300.jpg\" alt=\"NorsSat1\" class=\"wp-image-761\" style=\"width:275px;height:275px\" srcset=\"https:\/\/eidel.no\/en\/wp-content\/uploads\/sites\/2\/2021\/05\/NORSAT-1-overvaaker-trafiikken_full_site-e1461165881185-300x300.jpg 300w, https:\/\/eidel.no\/en\/wp-content\/uploads\/sites\/2\/2021\/05\/NORSAT-1-overvaaker-trafiikken_full_site-e1461165881185-150x150.jpg 150w, https:\/\/eidel.no\/en\/wp-content\/uploads\/sites\/2\/2021\/05\/NORSAT-1-overvaaker-trafiikken_full_site-e1461165881185-768x768.jpg 768w, https:\/\/eidel.no\/en\/wp-content\/uploads\/sites\/2\/2021\/05\/NORSAT-1-overvaaker-trafiikken_full_site-e1461165881185.jpg 960w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><figcaption class=\"wp-element-caption\">NorSat-1<\/figcaption><\/figure>\n<\/div>\n\n\n<p>The m-NLP development was supported through the ESA GSTP programme under ESA Contract No. 4000109393\/13\/NL\/AK. The instrument can sample electron density and spacecraft floating potential at sampling rates up to 5 kHz, i.e., close to meter scale resolution in Low Earth Orbit. The instrument prototype has flight heritage from nine sounding rockets up to 350 km altitude, and an engineering model of the boom system is qualified for the Norsat-1 satellite that was launched on 14 July 2017.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">History of m-NLP at UiO<\/h3>\n\n\n\n<p>The University of Oslo has for the last 13 years developed a new Langmuir probe system for high spatial resolution measurements of ionospheric electron density, together with measurements of the spacecraft floating potential. The system consists of four miniaturized cylindrical Langmuir probes, and is therefor referred to as the multi-Needle Langmuir Probe system (m-NLP).<\/p>\n\n\n\n<p>The system is tested on six sounding rockets flights from 2003 \u2013 2012 to altitudes of 350 km, and several upcoming CubeSat mission will have the m-NLP system as the science payload, i.e. the QB50 multi-satellite mission. The advantages of the m-NLP system compared to other Langmuir probes are the unprecedented high sampling rate, and the capability of on-board processing of electron density and spacecraft floating potential with low computational power requirements. For the spacecraft operators this means that the can get valuable info on the plasma conditions around the satellite, as well as the spacecraft charging levels. Both at low telemetry cost, and with high time resolution.<\/p>\n\n\n\n<p><\/p>\n\n\n\r\n\r\n<section \r\n\r\ndata-id=\"block_a46d1369a1a2873a3febdba098a440b8\" \r\n\r\ndata-type=\"gutenberg-accordion\" \r\n\r\nclass=\"\r\n\r\n\taccordion \r\n\taccordion-block_a46d1369a1a2873a3febdba098a440b8 \r\n\r\n\tpadding-top-0 \r\n\tpadding-bottom-0 \r\n\r\n\tmargin-top-0 \r\n\tmargin-bottom-0 \r\n\r\n\tstandard \r\n \r\n\t\r\n\t\r\n\">\r\n\t\r\n\r\n\t<div class='accordion-content center-xs   col-xs-12 '>\r\n\t\t<div class=\"row center-xs\">\r\n\t\t\t<div class=\"col-xs-12\">\r\n\t\t\t\t<div class='row center-xs'>\r\n\r\n\t\t\t\t\t\r\n\t\t\t\t\t<div class=\"\r\n\t\t\t\t\t\taccordion-rows \r\n\t\t\t\t\t\tcenter-xs \r\n\t\t\t\t\t\tgutenberg-accordion-rows \r\n\t\t\t\t\t\t\t\t\t\t\t\tcol-lg-offset-0\t\t\t\t\t\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t<div class=\"\r\n\t\t\t\t\t\t\t\t\taccordion-row \r\n\t\t\t\t\t\t\t\t\tstart-xs \r\n\t\t\t\t\t\t\t\t\tgutenberg-accordion-row \t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\tclosed\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\">\r\n\r\n\t\t\t\t\t\t\t\t\t<div class=\"title\">\r\n\r\n\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\t<h3>\r\n\t\t\t\t\t\t\t\t\t\t\t\tDescription\t\t\t\t\t\t\t\t\t\t\t<\/h3>\r\n\r\n\r\n\t\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\r\n\r\n\t\t\t\t\t\t\t\t\t\t<div class=\"interactive toggle\">\r\n\t\t\t\t\t\t\t\t\t\t\t<i class=\"close fal fa-times\"><\/i>\r\n\t\t\t\t\t\t\t\t\t\t\t<i class=\"open fal fa-long-arrow-down\"><\/i>\r\n\t\t\t\t\t\t\t\t\t\t<\/div>\r\n\r\n\t\t\t\t\t\t\t\t\t<\/div>\r\n\r\n\t\t\t\t\t\t\t\t\t<div class=\"content\">\r\n\t\t\t\t\t\t\t\t\t\t<ul>\n<li>Developed as a part of the ICI sounding rocket program (University of Oslo, 4DSpace Initiative)<\/li>\n<li>Measures electron density and spacecraft floating potential down to meter scale<\/li>\n<li>Gives new possibilities for the understanding of the driving forces behind how e.g.<br \/>\nthe aurora affects radio communication and GNSS signals<\/li>\n<li>Low-cost UiO-version included on the NORSAT-1 satellite, launched on 14 July<br \/>\n2017.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-789\" src=\"https:\/\/eidel.no\/en\/wp-content\/uploads\/sites\/2\/2021\/05\/Electronics-Unit-1-300x215.png\" alt=\"\" width=\"300\" height=\"215\" srcset=\"https:\/\/eidel.no\/en\/wp-content\/uploads\/sites\/2\/2021\/05\/Electronics-Unit-1-300x215.png 300w, https:\/\/eidel.no\/en\/wp-content\/uploads\/sites\/2\/2021\/05\/Electronics-Unit-1.png 500w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t<\/div>\r\n\r\n\t\t\t\t\t\t\t\t<\/div>\r\n\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t<div class=\"\r\n\t\t\t\t\t\t\t\t\taccordion-row \r\n\t\t\t\t\t\t\t\t\tstart-xs \r\n\t\t\t\t\t\t\t\t\tgutenberg-accordion-row \t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\tclosed\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\">\r\n\r\n\t\t\t\t\t\t\t\t\t<div class=\"title\">\r\n\r\n\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\t<h3>\r\n\t\t\t\t\t\t\t\t\t\t\t\tFUNCTIONALITY\t\t\t\t\t\t\t\t\t\t\t<\/h3>\r\n\r\n\r\n\t\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\r\n\r\n\t\t\t\t\t\t\t\t\t\t<div class=\"interactive toggle\">\r\n\t\t\t\t\t\t\t\t\t\t\t<i class=\"close fal fa-times\"><\/i>\r\n\t\t\t\t\t\t\t\t\t\t\t<i class=\"open fal fa-long-arrow-down\"><\/i>\r\n\t\t\t\t\t\t\t\t\t\t<\/div>\r\n\r\n\t\t\t\t\t\t\t\t\t<\/div>\r\n\r\n\t\t\t\t\t\t\t\t\t<div class=\"content\">\r\n\t\t\t\t\t\t\t\t\t\t<ul>\n<li>On-board processing of measurement parameters gives a significant reduction in telemetry demands<\/li>\n<li>Boom system suitable for implementation on various satellite geometries<\/li>\n<li>Spatial resolution ~1 meter in LEO, enabling studies of plasma structures and turbulence<\/li>\n<li>Data can be used for space weather forecasting, e.g., geographical distribution of expected scintillation effects and availability forecasting in the coming hours for GNSS systems.<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t<\/div>\r\n\r\n\t\t\t\t\t\t\t\t<\/div>\r\n\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t<div class=\"\r\n\t\t\t\t\t\t\t\t\taccordion-row \r\n\t\t\t\t\t\t\t\t\tstart-xs \r\n\t\t\t\t\t\t\t\t\tgutenberg-accordion-row \t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\tclosed\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\">\r\n\r\n\t\t\t\t\t\t\t\t\t<div class=\"title\">\r\n\r\n\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\t<h3>\r\n\t\t\t\t\t\t\t\t\t\t\t\tTECHNICAL SPECIFICATIONS\t\t\t\t\t\t\t\t\t\t\t<\/h3>\r\n\r\n\r\n\t\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\r\n\r\n\t\t\t\t\t\t\t\t\t\t<div class=\"interactive toggle\">\r\n\t\t\t\t\t\t\t\t\t\t\t<i class=\"close fal fa-times\"><\/i>\r\n\t\t\t\t\t\t\t\t\t\t\t<i class=\"open fal fa-long-arrow-down\"><\/i>\r\n\t\t\t\t\t\t\t\t\t\t<\/div>\r\n\r\n\t\t\t\t\t\t\t\t\t<\/div>\r\n\r\n\t\t\t\t\t\t\t\t\t<div class=\"content\">\r\n\t\t\t\t\t\t\t\t\t\t<p>Measures electron density and spacecraft floating potential<br \/>\nElectronics Unit (122 x 61 x 109 mm, 813 grams)<br \/>\nDeployable boom system (400 x 384 x 65 mm)<br \/>\nCustomizable harness length (1.5 meter nominal)<br \/>\nRadiation tolerant up to 50 krad<br \/>\nSampling rate up to 7 kHz<br \/>\nTemperature range for Electronics Unit: -30\u00baC to +55 \u00baC<br \/>\nTemperature range for Boom System: -55\u00baC to +60 \u00baC<\/p>\n\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t<\/div>\r\n\r\n\t\t\t\t\t\t\t\t<\/div>\r\n\r\n\t\t\t\t\t\t\t\t\t\t\t\t    \t\t\t\t\t\t\r\n\r\n\t\t\t\t\t<\/div>\r\n\r\n\t\t\t\t<\/div>\r\n\t\t\t<\/div>\r\n\t\t<\/div>\r\n\t<\/div>\r\n<\/section>","protected":false},"excerpt":{"rendered":"<p>Overview Space weather creates ionospheric plasma effects on satellite instruments, disturbing both communication and navigation satellites in orbit and negatively impacting airtraffic in transpolar flights. The strongest GPS-scintillations occur when plasma clouds enter the polar cap through the auroral oval on the dayside, and exits the polar cap through the auroral oval on the nightside. [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":501,"parent":0,"menu_order":4,"comment_status":"open","ping_status":"open","template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-267","product","type-product","status-publish","format-standard","has-post-thumbnail","hentry","product_categories-space-instruments-systems"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>m-NLP - multi-Needle Langmuir Probe - Eidel - Engelsk<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/eidel.no\/en\/product\/multi-needle-langmuir-probe\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"m-NLP - multi-Needle Langmuir Probe - Eidel - Engelsk\" \/>\n<meta property=\"og:description\" content=\"Overview Space weather creates ionospheric plasma effects on satellite instruments, disturbing both communication and navigation satellites in orbit and negatively impacting airtraffic in transpolar flights. The strongest GPS-scintillations occur when plasma clouds enter the polar cap through the auroral oval on the dayside, and exits the polar cap through the auroral oval on the nightside. 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The strongest GPS-scintillations occur when plasma clouds enter the polar cap through the auroral oval on the dayside, and exits the polar cap through the auroral oval on the nightside. 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