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--></style></head><body lang=EN-US link="#0563C1" vlink="#954F72" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><b><span style='font-size:14.0pt;color:black'>Second Call for Letters of Application for Membership in ESA/NASA Lower Thermosphere-Ionosphere Science (ENLoTIS) Working Group:<span class=apple-converted-space> </span></span></b><span style='color:black'><o:p></o:p></span></p><p class=MsoNormal style='font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px'><u><span style='font-size:14.0pt;color:black'>DUE 11:59 hrs Central European Time</span></u><span class=apple-converted-space><i><span style='font-size:14.0pt;color:black'> </span></i></span><u><span style='font-size:14.0pt;color:black'>21 March 2022.</span></u><span style='color:black'><o:p></o:p></span></p><p class=MsoNormal style='font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px'><span style='font-size:14.0pt;color:black'> </span><span style='color:black'><o:p></o:p></span></p><p class=MsoNormal style='font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px'><span style='font-size:14.0pt;color:black'>The ESA Earth Observation Science, Applications, and Climate Department, together with the Heliophysics Division of NASA’s Science Mission Directorate, is establishing an informal working group to cooperatively explore future lower thermosphere-ionosphere (LTI) satellite mission concepts, targeting very low altitude (100-200 km)<span class=apple-converted-space> </span><i>in situ</i><span class=apple-converted-space> </span>sampling<span class=apple-converted-space><b> </b></span>of relevant geophysical parameters for neutrals, plasma, electromagnetic fields, and energetic particles that together will enable advancements in process understanding of neutral-ion interactions and other related science topics. The specific altitude region of interest sits at the interface between Earth and Space, focusing on the lower thermosphere and the ionospheric E-region in particular. Experience and expertise in the following key areas is needed:</span><span style='color:black'><o:p></o:p></span></p><p class=MsoNormal style='font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px'><span style='font-size:14.0pt;color:black'> </span><span style='color:black'><o:p></o:p></span></p><p class=MsoNormal style='caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><b><u><span style='font-size:14.0pt;color:black'>EN-LoTIS-WG Key areas</span></u></b><span class=apple-converted-space><b><span style='font-size:14.0pt;color:black'> </span></b></span><span style='color:black'><o:p></o:p></span></p><p class=MsoNormal style='margin-left:.75in;text-indent:-.5in;caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='font-size:14.0pt;color:black'>I.</span><span style='font-size:7.0pt;font-family:"Times New Roman",serif;color:black'> <span class=apple-converted-space> </span></span><span style='font-size:14.0pt;color:black'>Science domains and topics</span><span style='color:black'><o:p></o:p></span></p><ol style='margin-top:0in;caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px' start=1 type=I><ol style='margin-top:0in' start=1 type=a><li class=MsoNormal style='color:black;mso-list:l1 level2 lfo1'><span style='font-size:14.0pt'>Lower Thermosphere-Ionosphere Coupled System</span><o:p></o:p></li><li class=MsoNormal style='color:black;mso-list:l1 level2 lfo1'><span style='font-size:14.0pt'>Coupling to the middle- and lower atmosphere and Earth science</span><o:p></o:p></li></ol></ol><p class=MsoNormal style='margin-left:.75in;text-indent:-.5in;caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='font-size:14.0pt;color:black'>II.</span><span style='font-size:7.0pt;font-family:"Times New Roman",serif;color:black'> <span class=apple-converted-space> </span></span><span style='font-size:14.0pt;color:black'>Measurement principles, techniques, hardware, processing <span class=apple-converted-space> </span></span><span style='color:black'><o:p></o:p></span></p><ol style='margin-top:0in;caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px' start=2 type=I><ol style='margin-top:0in' start=1 type=a><li class=MsoNormal style='color:black;mso-list:l4 level2 lfo2'><span style='font-size:14.0pt'>Neutral atmosphere, Plasma, Fields and waves, Energetic particles</span><o:p></o:p></li></ol></ol><p class=MsoNormal style='margin-left:.75in;text-indent:-.5in;caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='font-size:14.0pt;color:black'>III.</span><span style='font-size:7.0pt;font-family:"Times New Roman",serif;color:black'> <span class=apple-converted-space> </span></span><span style='font-size:14.0pt;color:black'>Modelling, data exploitation and pathways to impact and applications</span><span style='color:black'><o:p></o:p></span></p><ol style='margin-top:0in;caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px' start=3 type=I><ol style='margin-top:0in' start=1 type=a><li class=MsoNormal style='color:black;mso-list:l3 level2 lfo3'><span style='font-size:14.0pt'>Knowledge & experience with the state-of-the-art models (e.g. General Circulation Models, ionospheric models, empirical models, etc.),</span><o:p></o:p></li><li class=MsoNormal style='color:black;mso-list:l3 level2 lfo3'><span style='font-size:14.0pt'>Statistical methods, data assimilation and OSSEs, data exploitation with societal benefits, connections to Space Weather</span><o:p></o:p></li></ol></ol><p class=MsoNormal style='margin-left:.75in;text-indent:-.5in;caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='font-size:14.0pt;color:black'>IV.</span><span style='font-size:7.0pt;font-family:"Times New Roman",serif;color:black'> <span class=apple-converted-space> </span></span><span style='font-size:14.0pt;color:black'>Experimental campaigns, synergies and context of global observing systems</span><span style='color:black'><o:p></o:p></span></p><ol style='margin-top:0in;caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px' start=4 type=I><ol style='margin-top:0in' start=1 type=a><li class=MsoNormal style='color:black;mso-list:l0 level2 lfo4'><span style='font-size:14.0pt'>Experience in the complementarity and synergies of ESA Earth Observation & NASA Heliospheric satellite mission programs</span><o:p></o:p></li><li class=MsoNormal style='color:black;mso-list:l0 level2 lfo4'><span style='font-size:14.0pt'>Experience with sounding rockets and ground-based facilities and methods</span><o:p></o:p></li></ol></ol><p class=MsoNormal style='margin-left:.75in;text-indent:-.5in;caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='font-size:14.0pt;color:black'>V.</span><span style='font-size:7.0pt;font-family:"Times New Roman",serif;color:black'> <span class=apple-converted-space> </span></span><span style='font-size:14.0pt;color:black'>LTI<span class=apple-converted-space> </span><i>in situ</i><span class=apple-converted-space> </span>mission definition and heritage</span><span style='color:black'><o:p></o:p></span></p><ol style='margin-top:0in;caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px' start=5 type=I><ol style='margin-top:0in' start=1 type=a><li class=MsoNormal style='color:black;mso-list:l2 level2 lfo5'><span style='font-size:14.0pt'>General experience with science and mission requirements formulation</span><o:p></o:p></li><li class=MsoNormal style='color:black;mso-list:l2 level2 lfo5'><span style='font-size:14.0pt'>technical experience in areas such as orbit propagation, spacecraft-environment interactions and measurement perturbations.</span><o:p></o:p></li><li class=MsoNormal style='color:black;mso-list:l2 level2 lfo5'><span style='font-size:14.0pt'>Multipoint measurements and heritage missions.<span class=apple-converted-space> </span></span><o:p></o:p></li></ol></ol><p class=MsoNormal style='margin-left:.75in;text-indent:-.5in;caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='font-size:14.0pt;color:black'>VI.</span><span style='font-size:7.0pt;font-family:"Times New Roman",serif;color:black'> <span class=apple-converted-space> </span></span><span style='font-size:14.0pt;color:black'>Community connections, collaboration, and coordination<span class=apple-converted-space> </span></span><span style='color:black'><o:p></o:p></span></p><p class=MsoNormal style='caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='font-size:14.0pt;color:black'> <o:p></o:p></span></p><p class=MsoNormal style='caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='font-size:14.0pt;color:black'> <o:p></o:p></span></p><p class=MsoNormal style='caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='font-size:14.0pt;color:black'>For more information on the ENLoTIS working group, please see the call website (<u><a href="https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmissionadvice.esa.int%2Fesa-nasa-science-working-group%2F&data=04%7C01%7Cjohn.p.mccormack%40nasa.gov%7Cd3fd262457184e23336908da01f29220%7C7005d45845be48ae8140d43da96dd17b%7C0%7C0%7C637824438591682048%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=oWPmiJbNaz5rFZhOwU4NuX2sgAx4ZmaYu1SmLqBW7a0%3D&reserved=0" title="https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmissionadvice.esa.int%2Fesa-nasa-science-working-group%2F&data=04%7C01%7Cjohn.p.mccormack%40nasa.gov%7Cd3fd262457184e23336908da01f29220%7C7005d45845be48ae8140d43da96dd17b%7C0%7C0%7C63782443"><span style='color:#0563C1'>https://missionadvice.esa.int/esa-nasa-science-working-group/</span></a></u>).<span class=apple-converted-space> </span><o:p></o:p></span></p><p class=MsoNormal style='font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px'><span style='font-size:14.0pt;color:black'> <o:p></o:p></span></p><p class=MsoNormal style='font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px'><span style='font-size:14.0pt;color:black'>For further information on the group or application process, please submit questions at<span class=apple-converted-space> </span><u><a href="https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmissionadvice.esa.int%2Fcontact-us%2F&data=04%7C01%7Cjohn.p.mccormack%40nasa.gov%7Cd3fd262457184e23336908da01f29220%7C7005d45845be48ae8140d43da96dd17b%7C0%7C0%7C637824438591682048%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=U577CHuGcsJ%2FHkftq2snUB%2BYNy8OpGqZXTkSqYy88bc%3D&reserved=0" title="https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmissionadvice.esa.int%2Fcontact-us%2F&data=04%7C01%7Cjohn.p.mccormack%40nasa.gov%7Cd3fd262457184e23336908da01f29220%7C7005d45845be48ae8140d43da96dd17b%7C0%7C0%7C637824438591682048%7CUnknown"><span style='color:#0563C1'>https://missionadvice.esa.int/contact-us/</span></a>.</u><o:p></o:p></span></p><p class=MsoNormal style='font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px'><span style='font-size:14.0pt;color:black'> </span><span style='color:black'><o:p></o:p></span></p><p class=MsoNormal style='font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px'><b><i><span style='font-size:14.0pt;color:black'>Letters of application must be received no later than 05:59 hrs Eastern US time or 11:59 hrs Central European Time on 21 March 2022.</span></i></b><span style='color:black'><o:p></o:p></span></p><p class=MsoNormal style='caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='font-size:14.0pt;color:black'> </span><span style='color:black'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt'><o:p> </o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>