{"id":65,"date":"2023-05-12T22:59:01","date_gmt":"2023-05-12T20:59:01","guid":{"rendered":"https:\/\/www.bexus.org\/?page_id=65"},"modified":"2026-02-11T17:23:59","modified_gmt":"2026-02-11T16:23:59","slug":"weatherballoons","status":"publish","type":"page","link":"https:\/\/www.bexus.org\/index.php\/weatherballoons\/","title":{"rendered":"Weather Balloon Missions"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">The Department of Extraterrestrial Physics has launched numerous missions into the stratosphere using weather balloons. Many flights were performed as preparation for BEXUS missions, but local schools were supported as well.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><a href=\"\/index.php\/category\/weatherballon\/\" data-type=\"link\" data-id=\"\/index.php\/category\/weatherballon\/\">News about flights<\/a><\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">This is a list of ballon missions supported by the Department of Extraterrestrial Physics at Kiel University:<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>2025-09-30 <a href=\"https:\/\/www.webergymnasium.de\/erste-eindruecke-vom-start-des-weber-wetterballons\/\">Weber \u00fcber den Wolken<\/a><\/li>\n\n\n\n<li>2025-07-10 <a href=\"https:\/\/www.bexus.org\/index.php\/2025\/07\/10\/spot-cleared-the-elbe\/\" data-type=\"post\" data-id=\"977\">Holstenschule Neum\u00fcnster, flight 2<\/a><\/li>\n\n\n\n<li>2025-07-09 Gymnasium Trittau<\/li>\n\n\n\n<li>2025-04-01 <a href=\"https:\/\/www.bexus.org\/index.php\/2025\/04\/02\/seth-junior-survived\/\" data-type=\"post\" data-id=\"787\">SETH junior<\/a><\/li>\n\n\n\n<li>2024-06-24 <a href=\"https:\/\/wolke.bexus.org\/index.php\/s\/gAJpnRs9mt35pM5\" data-type=\"link\" data-id=\"https:\/\/wolke.bexus.org\/index.php\/s\/gAJpnRs9mt35pM5\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Hebbel Hoch Hinaus<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.bexus.org\/index.php\/chaosjunior\/\" data-type=\"page\" data-id=\"398\">2023-09, IEAP-ET Kiel, CHAOSjunior, flight 1<\/a> (during <a href=\"https:\/\/www.highlights-physik.de\/\">Highlights der Physik<\/a>)<\/li>\n\n\n\n<li>2023-09, <s>Holstenschule Neum\u00fcnster, flight 2<\/s><\/li>\n\n\n\n<li><a href=\"https:\/\/www.bexus.org\/index.php\/weatherballoons\/ricarda-huch-schule\/\" data-type=\"page\" data-id=\"325\">2023-09-06, Ricarda-Huch-Schule Kiel (Matti), flight 3<\/a><\/li>\n\n\n\n<li><a rel=\"noreferrer noopener\" href=\"https:\/\/www.holstenschule.de\/info\/flug-ins-weltall\/\" target=\"_blank\">2022-10-04, Holstenschule Neum\u00fcnster, flight 1<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.schule.physik.uni-mainz.de\/wetterballon-projekt\/\">2021-12-04<\/a><a rel=\"noreferrer noopener\" href=\"https:\/\/gymno.net\/news-single.php?id_termin=1511\" target=\"_blank\">, Gymnasium Nieder-Olm<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.fh-kiel.de\/news\/hoeher-als-der-everest\/\">2019-07-09, Fachhochschule Kiel <\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.rhs-kiel.de\/bilder\/2019\/wetterballon\/\">2019-06-06, Ricarda Huch Schule Kiel (Matti), flight 1<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.bexus.org\/et\/people\/etna\/flight2\/\">2019-05-05, IEAP-ET Kiel, TANOS Junior, flight 2<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.bexus.org\/et\/people\/etna\/flight\/\">2018-09-24, IEAP-ET Kiel, TANOS Junior, flight 1<\/a><\/li>\n\n\n\n<li>2017-07-13, Auguste Viktoria Schule in Itzehoe (Katja)<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Other related missions:<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/cfg.schule\/?s=ballon\">Carl-Friedrich-Gau\u00df-Schule Hemmingen (Silvia)<\/a><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Possible payloads:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"http:\/\/rpirena.psjt.org\/\">etPiZero1 RPiRENA: Cosmic Ray Detector on a Raspberry Pi<\/a><\/li>\n\n\n\n<li>&#8230;<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Useful tools:<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Instructions and Templates: <a href=\"https:\/\/forge.bexus.org\/Ava\/Wetterballon\">https:\/\/forge.bexus.org\/Ava\/Wetterballon<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/predict.sondehub.org\/?profile=standard_profile&amp;ascent_rate=5&amp;burst_altitude=40000&amp;descent_rate=4&amp;launch_altitude=5&amp;launch_latitude=54.3233&amp;launch_longitude=10.134&amp;prediction_type=1_hour&amp;launch_datetime=now\"><mark style=\"background-color:#ffffff\" class=\"has-inline-color has-black-color\">Balloon path and landing predictor<\/mark><\/a><br><sub><sup>(with Cambridge University Spaceflight <a href=\"https:\/\/tawhiri.readthedocs.io\/en\/latest\/\">T\u0101whirim\u0101tea engine<\/a> and  <a href=\"https:\/\/nomads.ncep.noaa.gov\/?var_HGT=on&amp;var_UGRD=on&amp;var_VGRD=on&amp;all_lev=on\">NCEP GFS 0.50 degree grid forecast model<\/a>)<\/sup><\/sub><\/li>\n\n\n\n<li><a href=\"https:\/\/www.stratoflights.com\/en\/tutorial\/weather-balloon-tools\/helium-calculator\/\">Helium Calculator<\/a><br>1 liter of helium lifts approximately 1 gram.<br>Experience shows that it bursts higher and later than calculated.<br>Ascent speeds of more than 5 m\/s could cause the gondola to oscillate in a troublesome manner.<br>Example values: 1600g balloon, 800-1600g payload, 80-100bar\u00d750L helium, &lt;5m\/s ascent rate, 36-41km altitude, ~4m\/s falling.<\/li>\n\n\n\n<li>alternative <a href=\"https:\/\/sondehub.org\/calc\/?bd=12&amp;cd=0.4\">Balloon burst calculator<\/a> <br><sup><sub>(better with higher Burst Diameter = 11-13m and higher Balloon Cd = 0.3 for the <a href=\"https:\/\/www.stratoflights.com\/en\/shop\/weather-balloon\/\">1600 g Weather Balloon<\/a> with max 4.4m\u00b3@1bar Helium)<\/sub><\/sup><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Comparison with measurements:<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>2023-09-06, Ricarda-Huch-Schule Kiel (Matti), flight 3:\n<ul class=\"wp-block-list\">\n<li>Balloon weight: 1600g<\/li>\n\n\n\n<li>Payload weight: ~1000g<\/li>\n\n\n\n<li>Ascent speed: ~5m\/s<\/li>\n\n\n\n<li>Burst Altitude: 40.7km<\/li>\n\n\n\n<li>Falling speed: ~10m\/s<\/li>\n\n\n\n<li>Filled helium: 93bar\/1bar \u00d7 50l = 4.65m\u00b3.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>2022-10-04, Holstenschule Neum\u00fcnster, flight 1:\n<ul class=\"wp-block-list\">\n<li>Balloon weight: 1600g<\/li>\n\n\n\n<li>Gondola weight (without 70g parachute and cord): 875g<\/li>\n\n\n\n<li>Payload (gondola+parachute+cord): ~950g ?<\/li>\n\n\n\n<li>Ascent speed: 5.3m\/s<\/li>\n\n\n\n<li>Burst Altitude: 4.6mbar \u2259 36630m<\/li>\n\n\n\n<li>Burst Time: after 110min<\/li>\n\n\n\n<li>Falling speed: 10.2m\/s (first 60m\/s, at the end 3.8m\/s)<\/li>\n\n\n\n<li>Filled helium: 90bar\/1bar \u00d7 50l = 4.5m\u00b3<\/li>\n\n\n\n<li>Diameter at launch: 2\u00d73\u221a(4.5m\u00b3\u00d73\/4\/\u03c0) = 2m<\/li>\n\n\n\n<li>Volume of helium at 4.6mbar:  (1000\/4.6 \u00d7 4.5m\u00b3 = 1000m\u00b3<\/li>\n\n\n\n<li>Diameter without considering the pressure of the balloon envelope: 12.5m<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>2019-07-09, Fachhochschule Kiel\n<ul class=\"wp-block-list\">\n<li>Balloon weight: 1600g<\/li>\n\n\n\n<li>Payload weight: ~1000g<\/li>\n\n\n\n<li>Ascent speed: <\/li>\n\n\n\n<li>Burst Altitude: 38850m<\/li>\n\n\n\n<li>Burst Time: <\/li>\n\n\n\n<li>Flight Time: 235 min<\/li>\n\n\n\n<li>Filled helium: between 75bar\/1bar \u00d7 50l  and 84bar\/1bar \u00d7 50l  (82bar\/1bar \u00d7 50l)<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>2019-05-05, IEAP-ET Kiel, TANOS Junior flight 2\n<ul class=\"wp-block-list\">\n<li>Payload: ~1kg ?<\/li>\n\n\n\n<li>Burst Altitude: 40365m<\/li>\n\n\n\n<li>Flight Time: 3:45h=224min<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>2018-09-24, IEAP-ET Kiel, TANOS Junior flight 1\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n<ul class=\"wp-block-list\">\n<li>Payload: ~1kg ?<\/li>\n\n\n\n<li>Burst Altitude: 39960m<\/li>\n\n\n\n<li>Flight Time: 3:10h=190min<\/li>\n\n\n\n<li>Start: 08:50<\/li>\n\n\n\n<li>Burst: 39km: 11:00<\/li>\n\n\n\n<li>Landing: 12:00<\/li>\n\n\n\n<li>Ascent: 39km\/130min = 5.0m\/s<\/li>\n\n\n\n<li>Descent: 39km\/60min = 10.8m\/s<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>needed simulation input for correct flight time: Descent: 4m\/s<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>The Department of Extraterrestrial Physics has launched numerous missions into the stratosphere using weather balloons. Many flights were performed as preparation for BEXUS missions, but local schools were supported as well. News about flights This is a list of ballon missions supported by the Department of Extraterrestrial Physics at Kiel University: Other related missions: Possible payloads: Useful tools: Comparison with measurements:<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_crdt_document":"","footnotes":""},"class_list":["post-65","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.bexus.org\/index.php\/wp-json\/wp\/v2\/pages\/65","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bexus.org\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.bexus.org\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.bexus.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bexus.org\/index.php\/wp-json\/wp\/v2\/comments?post=65"}],"version-history":[{"count":25,"href":"https:\/\/www.bexus.org\/index.php\/wp-json\/wp\/v2\/pages\/65\/revisions"}],"predecessor-version":[{"id":1101,"href":"https:\/\/www.bexus.org\/index.php\/wp-json\/wp\/v2\/pages\/65\/revisions\/1101"}],"wp:attachment":[{"href":"https:\/\/www.bexus.org\/index.php\/wp-json\/wp\/v2\/media?parent=65"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}