Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Jouni Envall"'
Autor:
Nicholas Larsen, Alexander Mishev, Alexandros Binios, Ari-Pekka Leppänen, Eija Tanskanen, Esa Turunen, Ilya Usoskin, Jouni Envall, Pasi Lakkala, Toivo Iinatti
Publikováno v:
Proceedings of 27th European Cosmic Ray Symposium — PoS(ECRS).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5637ca63e4606aa0bc88fe58ed39ca4
https://doi.org/10.22323/1.423.0054
https://doi.org/10.22323/1.423.0054
Autor:
Alexander Mishev, Alexandros Binios, Esa Turunen, Ari-Pekka Leppänen, Nicholas Larsen, Eija Tanskanen, Ilya Usoskin, Jouni Envall, Toivo Iinatti, Pasi Lakkala
Measurements of the natural radiation background with different devices and at various conditions are important from a methodological point of view in order to compare and eventually inter-calibrate different experimental sets, also to provide a reli
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c9091462150e32133536e2bb0d61849f
http://urn.fi/urn:nbn:fi-fe2022050332327
http://urn.fi/urn:nbn:fi-fe2022050332327
Autor:
Jaan Praks, Arttu Punkkinen, Hannu Leppinen, Risto Punkkinen, Petri Niemelä, Nemanja Jovanovic, Andris Slavinskis, Petri Toivanen, Philipp Oleynik, Hannu Pekka Hedman, M. Rizwan Mughal, Tuomas Tikka, Antti Näsilä, Rami Vainio, S. Nyman, Bagus Riwanto, J. M.K. Slotte, Jan Gieseler, J. O. Lill, Jouni Envall, Pekka Janhunen
Publikováno v:
Mughal, M R, Praks, J, Vainio, R, Janhunen, P, Envall, J, Näsilä, A, Oleynik, P, Niemelä, P, Nyman, S, Slavinskis, A, Gieseler, J, Jovanovic, N, Riwanto, B, Toivanen, P, Leppinen, H, Tikka, T, Punkkinen, A, Punkkinen, R, Hedman, H P, Lill, J O & Slotte, J M K 2021, ' Aalto-1, multi-payload CubeSat : In-orbit results and lessons learned ', Acta Astronautica, vol. 187, pp. 557-568 . https://doi.org/10.1016/j.actaastro.2020.11.044
The in-orbit results and lessons learned of the first Finnish satellite Aalto-1 are briefly presented in this paper. Aalto-1, a three-unit CubeSat which was launched in June 2017, performed AaSI (Aalto Spectral Imager), Radiation Monitor (RADMON), an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fb0240ca7b083aa29eaea94d5dfb6a8a
https://cris.vtt.fi/en/publications/ec0876e3-87e5-4e12-9d41-100822466e0c
https://cris.vtt.fi/en/publications/ec0876e3-87e5-4e12-9d41-100822466e0c
Autor:
Petri Niemelä, Risto Punkkinen, T. Peltola, Jaan Praks, Hannu Leppinen, Gabriel Jörg Schwarzkopf, Hannu Pekka Hedman, A. Bosser, Arttu Punkkinen, Nemanja Jovanovic, Antti Näsilä, Tuomas Tikka, J. M.K. Slotte, J. O. Lill, M. Rizwan Mughal, Jan Gieseler, Rami Vainio, Ari Virtanen, Jouni Envall, Heikki Kettunen, Bagus Riwanto, Petri Toivanen, Tero Säntti, Philipp Oleynik, Andris Slavinskis, A. Kestilä, Pekka Janhunen
Publikováno v:
Praks, J, Mughal, M R, Vainio, R, Janhunen, P, Envall, J, Oleynik, P, Näsilä, A, Leppinen, H, Niemelä, P, Slavinskis, A, Gieseler, J, Toivanen, P, Tikka, T, Peltola, T, Bosser, A, Schwarzkopf, G, Jovanovic, N, Riwanto, B, Kestilä, A, Punkkinen, A, Punkkinen, R, Hedman, H P, Säntti, T, Lill, J O, Slotte, J M K, Kettunen, H & Virtanen, A 2021, ' Aalto-1, multi-payload CubeSat : Design, integration and launch ', Acta Astronautica, vol. 187, pp. 370-383 . https://doi.org/10.1016/j.actaastro.2020.11.042
The design, integration, testing, and launch of the first Finnish satellite Aalto-1 is briefly presented in this paper. Aalto-1, a three-unit CubeSat, launched into Sun-synchronous polar orbit at an altitude of approximately 500 km, is operational si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::55b99c83000e861810bacecc26274663
https://aaltodoc.aalto.fi/handle/123456789/110888
https://aaltodoc.aalto.fi/handle/123456789/110888
Autor:
Jouni Envall, Eija Tanskanen
Sodankylä Geophysical Observatory (SGO) has conducted research and provided high quality data series for numerous geophysical disciplines for more than a hundred years. As the next step in developing SGO’s measurement network, we are developing ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aca71b5460ded9e98efb67154bc1e442
https://doi.org/10.5194/egusphere-egu21-15788
https://doi.org/10.5194/egusphere-egu21-15788
Autor:
Katrina Kalnina, Kadri Bussov, Hendrik Ehrpais, Triin Teppo, Silvia-Kristiin Kask, Merili Jauk, Andris Slavinskis, Jouni Envall
Publikováno v:
2018 IEEE Aerospace Conference.
Here we present a successful crowdfunding campaign, which raised more than €38.7k (≈$45.8k) for ESTCube-2 satellite development. Crowdfunding is the practice of funding a project or venture by raising money from a large number of people who each
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e2fa010b137dd3f737652cd25161fd6d
https://doi.org/10.1109/aero.2018.8396722
https://doi.org/10.1109/aero.2018.8396722
Autor:
Petri Toivanen, Johan Kutt, Jaanus Kalde, Roland Rosta, Mihkel Pajusalu, Mart Noorma, Paul Liias, Andris Slavinskis, S. Lätt, Jouni Polkko, Hendrik Ehrpais, Jouni Envall, Karoli Kahn, Tõnis Eenmäe, Erik Kulu, Taneli Kalvas, Indrek Sünter, Riho Vendt, Pekka Janhunen, Urmas Kvell, Henri Kuuste, Karlis Zalite, Erik Ilbis, Viljo Allik, Kaspars Laizans, Jaan Viru
Publikováno v:
IEEE Aerospace and Electronic Systems Magazine. 30:12-22
ESTCube-1 is a student satellite project lead by the University of Tartu, Estonia, and supported by the European Space Agency (ESA) via Plan for European Cooperating States (PECS). Development of ESTCube-1 has been a collaborative effort with many in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::edea8180ab31251f2de5ed3054424668
https://doi.org/10.1109/maes.2015.150034
https://doi.org/10.1109/maes.2015.150034
Publikováno v:
Acta Astronautica. 106:111-119
The electric solar wind sail produces thrust by centrifugally spanned high voltage tethers interacting with the solar wind protons. The sail attitude can be controlled and attitude maneuvers are possible by tether voltage modulation synchronous with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e3ad4bfbf9eeb9f78f79024e89064856
https://doi.org/10.1016/j.actaastro.2014.10.031
https://doi.org/10.1016/j.actaastro.2014.10.031
Autor:
Petri Toivanen, Antti Nuottajärvi, Timo Rauhala, J. Kauppinen, Mihkel Pajusalu, Jaanus Kalde, Olli Tarvainen, Henri Seppänen, Matis Averin, Taneli Kalvas, Pekka Janhunen, S.K. Kiprich, Kaspars Laizans, Viljo Allik, Henri Kuuste, Hannu Koivisto, Edward Hæggström, Erik Ilbis, Jukka Ukkonen, Jouni Envall
Publikováno v:
Proceedings of the Estonian Academy of Sciences. 63(2):210-221
The scientific mission of ESTCube-1, launched in May 2013, is to measure the electric solar wind sail (E-sail) force in orbit. The experiment is planned to push forward the development of the E-sail, a propulsion method recently invented at the Finni
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::72aebe632dbfba8e2a48101023e9d381
http://juuli.fi/Record/0028748214
http://juuli.fi/Record/0028748214
Autor:
Lasse Ylianttila, Erkki Ikonen, Petri Kärhä, Andrew Coleman, Jouni Envall, Harry Moseley, Murat Durak
Publikováno v:
Metrologia. 43:S27-S30
A new method is described for comparing calibration facilities for broadband ultraviolet (UV) meters. The method is validated in a successful pilot comparison between five European laboratories performing UVA irradiance responsivity calibrations. Par
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4b4b68f900f03d309412919d9536e5a7
https://doi.org/10.1088/0026-1394/43/2/s06
https://doi.org/10.1088/0026-1394/43/2/s06