{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,7]],"date-time":"2026-04-07T13:50:19Z","timestamp":1775569819938,"version":"3.50.1"},"reference-count":39,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2021,3,26]],"date-time":"2021-03-26T00:00:00Z","timestamp":1616716800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100003335","name":"Ministry of Education, Youth and Science","doi-asserted-by":"publisher","award":["European Regional Development Fund-Project CRREAT No. CZ.02.1.01\/0.0\/0.0\/15 003\/0000481"],"award-info":[{"award-number":["European Regional Development Fund-Project CRREAT No. CZ.02.1.01\/0.0\/0.0\/15 003\/0000481"]}],"id":[{"id":"10.13039\/501100003335","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>The movement of the South Atlantic Anomaly has been observed since the end of the last century by many spacecrafts equipped with various types of radiation detectors. All satellites that have observed the drift of the South Atlantic Anomaly have been exclusively large missions with heavy payload equipment. With the recent rapid progression of CubeSats, it can be expected that the routine monitoring of the South Atlantic Anomaly will be taken over by CubeSats in the future. We present one-and-a-half years of observations of the South Atlantic Anomaly radiation field measured by a CubeSat in polar orbit with an elevation of 540 km. The position is calculated by an improved centroid method that takes into account the area of the grid. The dataset consists of eight campaigns measured at different times, each with a length of 22 orbits (~2000 min). The radiation data were combined with GPS position data. We detected westward movement at 0.33\u00b0\/year and southward movement at 0.25\u00b0\/year. The position of the fluence maximum featured higher scatter than the centroid position.<\/jats:p>","DOI":"10.3390\/rs13071274","type":"journal-article","created":{"date-parts":[[2021,3,26]],"date-time":"2021-03-26T13:17:53Z","timestamp":1616764673000},"page":"1274","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["CubeSat Observation of the Radiation Field of the South Atlantic Anomaly"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0927-3158","authenticated-orcid":false,"given":"Pavel","family":"Kov\u00e1\u0159","sequence":"first","affiliation":[{"name":"Faculty of Electrical Engineering, Czech Technical University in Prague, Technick\u00e1 1902\/2, 166 27 Prague, Czech Republic"}]},{"given":"Marek","family":"Sommer","sequence":"additional","affiliation":[{"name":"Nuclear Physics Institute of the Czech Academy of Sciences, Husinec-\u0158e\u017e 130, 250 68 \u0158e\u017e, Czech Republic"},{"name":"Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, V Hole\u0161ovi\u010dk\u00e1ch 2, 180 00 Prague, Czech Republic"}]}],"member":"1968","published-online":{"date-parts":[[2021,3,26]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1683","DOI":"10.1029\/JZ064i011p01683","article-title":"The geomagnetically trapped corpuscular radiation","volume":"64","year":"1959","journal-title":"J. Geophys. Res."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1548","DOI":"10.1002\/2017SW001687","article-title":"The Secular Variation of the Center of Geomagnetic South Atlantic Anomaly and Its Effect on the Distribution of Inner Radiation Belt Particles","volume":"15","author":"Ye","year":"2017","journal-title":"Space Weather"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"44","DOI":"10.1002\/2016SW001525","article-title":"SAMPEX observations of the South Atlantic anomaly secular drift during solar cycles 22\u201324","volume":"15","author":"Jones","year":"2017","journal-title":"Space Weather"},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Kurnosova, L.V., Kolobyanina, T.N., Logachev, V.I., Razorenov, L.A., Sirotkin, I.A., and Fradkin, M.I. (1962). Discovery of radiation anomalies above the South Atlantic at heights of 310\u2013340 km. Planet. Space Sci., 9.","DOI":"10.1016\/0032-0633(62)90057-0"},{"key":"ref_5","unstructured":"Underwood, C.I. (1990, January 27\u201330). In-orbit radiation effects monitoring on the UoSAT satellites. Proceedings of the Annual AIAA\/Utah State University Conference on Small Satellites, Logan, UT, USA."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"301","DOI":"10.1093\/oxfordjournals.rpd.a032856","article-title":"Doses due to the South Atlantic anomaly during the Euromir\u201995 mission measured by an on-board TLD system","volume":"85","author":"Deme","year":"1999","journal-title":"Radiat. Prot. Dosim."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"1701","DOI":"10.1016\/S1364-6826(02)00120-7","article-title":"The future of the South Atlantic anomaly and implications for radiation damage in space","volume":"64","author":"Heirtzler","year":"2002","journal-title":"J. Atmos. Solar-Terr. Phys."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"369","DOI":"10.1016\/1350-4487(96)00056-X","article-title":"Comparison between methods to compensate for the secular motion of the South Atlantic Anomaly","volume":"26","author":"Heynderickx","year":"1996","journal-title":"Radiat. Meas."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"243","DOI":"10.1590\/S0001-37652009000200010","article-title":"Time evolution of the South Atlantic Magnetic Anomaly","volume":"81","author":"Hartmann","year":"2009","journal-title":"An. Acad. Bras. Cienc."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"330","DOI":"10.1002\/2016SW001371","article-title":"Observation and modeling of the South Atlantic Anomaly in low Earth orbit using photometric instrument data","volume":"14","author":"Schaefer","year":"2016","journal-title":"Space Weather"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"2253","DOI":"10.1016\/j.asr.2004.04.013","article-title":"Noise in wireless systems from solar radio bursts","volume":"36","author":"Lanzerotti","year":"2005","journal-title":"Adv. Space Res."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"237","DOI":"10.1016\/j.jastp.2018.03.015","article-title":"Mapping the South Atlantic Anomaly continuously over 27 years","volume":"177","author":"Anderson","year":"2018","journal-title":"J. Atmos. Solar-Terr. Phys."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"1251","DOI":"10.1109\/TNS.2020.2998508","article-title":"Analysis of the Drift of the South Atlantic Anomaly from ICARE and SEM-2 Flight Data","volume":"67","author":"Aubry","year":"2020","journal-title":"IEEE Trans. Nucl. Sci."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"911","DOI":"10.1016\/0273-1177(94)90557-6","article-title":"Recent space shuttle observations of the South Atlantic anomaly and the radiation belt models","volume":"14","author":"Konradi","year":"1994","journal-title":"Adv. Space Res."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"2343","DOI":"10.1029\/96JA03494","article-title":"Drift rate of the South Atlantic Anomaly","volume":"102","author":"Badhwar","year":"1997","journal-title":"J. Geophys. Res. Space Phys."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"489","DOI":"10.1016\/S1350-4487(02)00079-3","article-title":"The high-energy proton fluxes in the SAA observed with REM aboard the MIR orbital station","volume":"35","author":"Zehnder","year":"2002","journal-title":"Radiat. Meas."},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Ginet, G.P., Madden, D., Dichter, B.K., and Brautigam, D.H. (2007, January 23\u201327). Energetic proton maps for the South Atlantic Anomaly. Proceedings of the IEEE Radiation Effects Data Workshop, Honolulu, HI, USA.","DOI":"10.1109\/REDW.2007.4342532"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"76","DOI":"10.1016\/j.asr.2007.02.015","article-title":"SAA drift: Experimental results","volume":"41","author":"Grigoryan","year":"2008","journal-title":"Adv. Space Res."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"125","DOI":"10.1016\/j.epsl.2009.02.004","article-title":"Temporal variations of strength and location of the South Atlantic Anomaly as measured by RXTE","volume":"281","author":"Wilms","year":"2009","journal-title":"Earth Planet. Sci. Lett."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"1056","DOI":"10.1016\/j.asr.2011.05.014","article-title":"Monitoring the South Atlantic Anomaly using ATSR instrument series","volume":"48","author":"Casadio","year":"2011","journal-title":"Adv. Space Res."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"9658","DOI":"10.1002\/2014JA020300","article-title":"Solar cycle variations of trapped proton flux in the inner radiation belt","volume":"119","author":"Qin","year":"2014","journal-title":"J. Geophys. Res. Space Phys."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"94","DOI":"10.1016\/j.epsl.2006.12.008","article-title":"Investigation of a secular variation impulse using satellite data: The 2003 geomagnetic jerk","volume":"255","author":"Olsen","year":"2007","journal-title":"Earth Planet. Sci. Lett."},{"key":"ref_23","doi-asserted-by":"crossref","unstructured":"Toorian, A., Diaz, K., and Lee, S. (2008, January 1\u20138). The CubeSat approach to space access. Proceedings of the IEEE Aerospace Conference Proceedings, Big Sky, MT, USA.","DOI":"10.1109\/AERO.2008.4526293"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"59","DOI":"10.1016\/j.paerosci.2016.11.002","article-title":"CubeSat evolution: Analyzing CubeSat capabilities for conducting science missions","volume":"88","author":"Poghosyan","year":"2017","journal-title":"Prog. Aerosp. Sci."},{"key":"ref_25","unstructured":"Blackwell, W.J., Allan, G., Allen, G., Burianek, D., Busse, F., Elliott, D., Galbraith, C., Leslie, R., Osaretin, I., and Shields, M. (2014, January 4\u20137). Microwave Radiometer Technology Acceleration Mission (MiRaTA): Advancing Weather Remote Sensing with Nanosatellites. Proceedings of the 28th Annual AIAA\/USU Conference on Small Satellites, Logan, UT, USA."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"1413","DOI":"10.1016\/j.asr.2015.06.036","article-title":"LAICE CubeSat mission for gravity wave studies","volume":"56","author":"Westerhoff","year":"2015","journal-title":"Adv. Space Res."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"573","DOI":"10.1086\/677236","article-title":"BRITE-Constellation: Nanosatellites for Precision Photometry of Bright Stars","volume":"126","author":"Weiss","year":"2014","journal-title":"Publ. Astron. Soc. Pacific"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"6489","DOI":"10.1002\/2013JA019342","article-title":"First results from CSSWE CubeSat: Characteristics of relativistic electrons in the near-Earth environment during the October 2012 magnetic storms","volume":"118","author":"Li","year":"2013","journal-title":"J. Geophys. Res. Space Phys."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"16","DOI":"10.1109\/MAES.2019.2917802","article-title":"The CubeSat Mission to Study Solar Particles","volume":"34","author":"Desai","year":"2019","journal-title":"IEEE Aerosp. Electron. Syst. Mag."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"52","DOI":"10.1016\/j.asr.2019.11.023","article-title":"Radiation monitor RADMON aboard Aalto-1 CubeSat: First results","volume":"66","author":"Gieseler","year":"2020","journal-title":"Adv. Space Res."},{"key":"ref_31","doi-asserted-by":"crossref","unstructured":"Simms, L.M., Jernigan, J.G., Malphrus, B.K., McNeil, R., Brown, K.Z., Rose, T.G., Lim, H.S., Anderson, S., Kruth, J.A., and Doty, J.P. (2012, January 24). CXBN: A blueprint for an improved measurement of the cosmological x-ray background. Proceedings of the Hard X-ray, Gamma-ray, and Neutron Detector Physics XIV, San Diego, CA, USA.","DOI":"10.1117\/12.953573"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"159","DOI":"10.1134\/S2075108717020079","article-title":"piNAV L1\u2014GPS receiver for small satellites","volume":"8","year":"2017","journal-title":"Gyroscopy Navig."},{"key":"ref_33","first-page":"745","article-title":"Start Acceleration of the Space GPS Receiver","volume":"66","year":"2020","journal-title":"Int. J. Electron. Telecommun."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1155\/2020\/8894984","article-title":"Experiences with the GPS in Unstabilized CubeSat","volume":"2020","author":"Kovar","year":"2020","journal-title":"Int. J. Aerosp. Eng."},{"key":"ref_35","first-page":"1","article-title":"High altitude balloon test flight of miniature low power dosimeter for small satellites","volume":"74","author":"Laifr","year":"2018","journal-title":"Slabop. Obz."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"106471","DOI":"10.1016\/j.radmeas.2020.106471","article-title":"Measurement of cosmic radiation in LEO by 1U CubeSat","volume":"139","author":"Kovar","year":"2020","journal-title":"Radiat. Meas."},{"key":"ref_37","unstructured":"Perov, A., and Charisova, V. (2010). GLONASS, Principles, Architecture and Function, Radiotechnika."},{"key":"ref_38","unstructured":"Subirana, J.S., Zornoza, J.M., and Hern\u00e1ndez-Pajares, M. (2013). GNSS DATA PROCESSING Volume I: Fundamentals and Algorithms, ESTEC. ESA Communications."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"63","DOI":"10.1007\/BF02096832","article-title":"A concept of the mass center of a system of material points in the constant curvature spaces","volume":"154","author":"Galperin","year":"1993","journal-title":"Commun. Math. Phys."}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/13\/7\/1274\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,13]],"date-time":"2025-10-13T13:53:06Z","timestamp":1760363586000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/13\/7\/1274"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,3,26]]},"references-count":39,"journal-issue":{"issue":"7","published-online":{"date-parts":[[2021,4]]}},"alternative-id":["rs13071274"],"URL":"https:\/\/doi.org\/10.3390\/rs13071274","relation":{},"ISSN":["2072-4292"],"issn-type":[{"value":"2072-4292","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,3,26]]}}}