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ΠϯλʔωοτͱΦʔϓϯͳແઢٕज़ͷࠓޙ ྗ෢ ݈࣍ ྗ෢݈ٕ࣍ज़࢜ࣄ຿ॴ / ϖύϘݚڀॴ 2020೥9݄3೔ ৘ใॲཧֶձୈ51ճIOTݚڀձ Kenji Rikitake / IPSJ IOT51 3-SEP-2020 1

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ຊൃදͷ಺༰ • എܠ: ແઢٕज़ͷΦʔϓϯԽͱి೾؂ཧମ੍ͷໃ६ • ΦʔϓϯԽͷྫ(1): SDRͱΠϯλʔωοτ • ΦʔϓϯԽͷྫ(2): ΞϚνϡΞແઢͱΦʔϓϯαΠΤϯε • ແઢͷ҉߸ར༻Ͱͷ໰୊఺ • ·ͱΊ: ࠓޙԿΛม͑Ε͹͍͍ͷ͔ Kenji Rikitake / IPSJ IOT51 3-SEP-2020 2

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എܠ ແઢٕज़ͷΦʔϓϯԽͱ ి೾؂ཧମ੍ͷໃ६ Kenji Rikitake / IPSJ IOT51 3-SEP-2020 3

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ແઢٕज़ͷΦʔϓϯԽ Πϯλʔωοτͷར༻΍׆༻Λલఏʹͨ͠ΦʔϓϯԽ͕Ճ଎த • ιϑτ΢ΣΞແઢػʢSDRʣͷීٴ • FM์ૹͷϚϧνύεআڈͳͲߴ౓ͳػೳͷ࣮ݱ͕༰қʹͳͬͨ • Τϯυϊʔυ͔Βͷ৘ใू໿ʹΑΔIoTతͳར༻ͷීٴ • FlightRadar24ͳͲͰάϩʔόϧͳঢ়گͷՄࢹԽ͕Ͱ͖ΔΑ͏ʹͳͬͨ • ػೳͷΦʔϓϯιʔειϑτ΢ΣΞʢOSSʣԽͷਪਐ • ൿ఻ͩͬͨແઢٕज़ͷ։͕ࣔਐΈֶश͢Δ͜ͱ͕༰қʹͳͬͨ Kenji Rikitake / IPSJ IOT51 3-SEP-2020 4

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ి೾؂ཧମ੍ͱΦʔϓϯԽͷໃ६ ೔ຊͷి೾๏Ͱ͸ࣄલڐՄ͕લఏ • ؂ཧͷ໨త: ࠞ৴๦֐ͷࣄલ๷ࢭͱి೾ͷެฏͳར༻ • ݱ࣮: ࣄલڐՄݪଇʹ߹Θͳ͍΋ͷ͸͢΂ͯྫ֎తڐՄ • ݁Ռ: ๏཯͕ෳࡶʹͳΓਝ଎ʹಈ͚ͳ͍ • Ͳͷྫ֎͕ԿΛΧόʔ͍ͯ͠Δͷ͔؆୯ʹΘ͔Βͳ͍ Kenji Rikitake / IPSJ IOT51 3-SEP-2020 5

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ి೾๏͸ݸผ໔ڐʹΑΔࣄલڐՄ͕େݪଇ • ࣄલͷ໔ڐਃ੥→༧උ໔ڐ • ༧උ໔ڐʹجͮ͘޻ࣄˠམ੒ݕࠪ • མ੒ݕ͕ࠪ௨ͬͯ΍ͬͱ໔ڐঢ়ަ෇ • ٕज़త࢓༷͕มΘΔͱશ෦΍Γ௚͠: ಈతʹม͑ΒΕͳ͍ ࢀߟ: 2020೥7݄ݱࡏͷؔ౦૯߹௨৴ہͰͷΞϚνϡΞແઢہͷਃ੥ॲཧʹ͸ຖճ໿1ϲ݄͔͔͍ͬͯΔ Kenji Rikitake / IPSJ IOT51 3-SEP-2020 6

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ి೾๏ʹ͓͚Δྫ֎ͷ਺ʑ • ແઢLANʢIEEE802.11ʣ • ܞଳి࿩΍εϚʔτϑΥϯͷ୺຤: ిؾ௨৴ࣄۀऀ͕໔ڐΛ୅ߦ • LoRaWAN: 920MHzଳͷಛఆখిྗແઢ • σδλϧ؆қແઢ / σδλϧখిྗίϛϡχςΟແઢ • ΞϚνϡΞແઢʢϏδωεͷ࿩ʹ͸࢖͑ͳ͍ʣ Kenji Rikitake / IPSJ IOT51 3-SEP-2020 7

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ݱঢ়ͷి೾؂ཧମ੍ͷ໰୊఺ • ීஈ࢖͏௨৴ํࣜ͸๏཯্ͷྫ֎͹͔Γ • ηΩϡϦςΟڧԽͳͲͷ৽نٕज़΋։ൃޙ͙͢ʹ࣮ݧͰ͖ͳ͍ • ਃ੥͕ಧग़ʹͳͬͨͱ͸͍͑ࣄલڐՄݪଇ͸มΘΒͳ͍ • ߗ௚੍ͨ͠౓ͷ݁ՌɺແڐՄͷӡ༻͕ຮԆ • ݁Ռͱٕͯ͠ज़ͷਐาʹ๏཯͕͍͍͍ͭͯͬͯͳ͍ Kenji Rikitake / IPSJ IOT51 3-SEP-2020 8

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ΦʔϓϯԽͷྫ(1): SDRͱΠϯλʔωοτ Kenji Rikitake / IPSJ IOT51 3-SEP-2020 9

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RTL-SDR V3 • ςϨϏड৴νοϓͷԠ༻ • 24MHz ~ 1766MHz • FM์ૹɺߤۭແઢɺΞϚνϡΞແઢɺ ADS-B౳ͷड৴ʹ޿͘࢖ΘΕ͍ͯΔ • FlightRadar24ͷਪ঑ػࡐ • υϥΠό͸OSS • ֤छOSSΞϓϦʹରԠ Kenji Rikitake / IPSJ IOT51 3-SEP-2020 10

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SDRʹΑΔFMϚϧνύε ϑΟϧλͷ࣮૷ྫ • ൃදऀͷOSS airspy-fmradionʹ࣮ͯ૷ • దԠϑΟϧλʹConstant Modulus AlgorithmͱෳૉLMSϑΟϧλΛ࢖༻ • ӈਤ͸NHKେࡕFM์ૹͷ࣌ใԻͷεϖ Ϋτϧ෼෍ɺTHD+NΛ0.918%ʢ྘ʣ͔ Β0.242%ʢ੺ʣʹ௿ݮ Kenji Rikitake / IPSJ IOT51 3-SEP-2020 13

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Πϯλʔωοτ͕SDRʹ༩͑ͨӨڹ • ࿦จ΋ϥΠϒϥϦ΋ࢀর࣮૷΋͢΂ͯΠϯλʔωοτ͔Β • Ϋϥ΢υίϯϐϡʔςΟϯάʹΑΔੈքதͷ৘ใͷू໿ • ड৴ػ͚ͩͰ͸ͳ͘ૹ৴ػ΋ΦʔϓϯԽ͞Ε͍ͯΔ • ແઢ԰͞Μ͚ͩͰͳ͘ܭࢉػ԰͞Μͷແઢٕज़΁ͷࢀઓ • →ίϯϐϡʔλͷI/OσόΠεͱͯ͠ͷແઢػ Kenji Rikitake / IPSJ IOT51 3-SEP-2020 14

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ΦʔϓϯԽͷྫ(2): ΞϚνϡΞແઢͱ ΦʔϓϯαΠΤϯε Kenji Rikitake / IPSJ IOT51 3-SEP-2020 15

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ΞϚνϡΞແઢͷྺ࢙ͱࠓޙ • ͔ͭͯ͸Ӧར໨తͰͳ͍ࡶஊΛָ͠ΊΔੈք࠷ॳͷSNSͩͬͨ • ݱ୅͸ιʔγϟϧϝσΟΞͷ໾ׂ͸Πϯλʔωοτʹৡͬͨ • ి೾ૹ৴ͱΞϯςφͳͲٕज़࣮ݧͷ৔ʹճؼͭͭ͋͠Δ • ͔͠͠COVID-19ԼͷݱࡏP2PͰࠃࡍ௨৴Ͱ͖Δ਺গͳ͍खஈ • ιϑτ΢ΣΞٕज़Ͱ௨৴৚͕݅ඈ༂తʹվળ͞Εͨ(WSJT) Kenji Rikitake / IPSJ IOT51 3-SEP-2020 16

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Πϯλʔωοτ͕ΞϚνϡΞແઢʹ༩͑ͨӨڹ • ࿦จ΋ϥΠϒϥϦ΋ࢀর࣮૷΋͢΂ͯΠϯλʔωοτ͔Β • Ϋϥ΢υίϯϐϡʔςΟϯάʹΑΔੈքதͷ৘ใͷू໿ • ௨৴ํࣜͷ։ൃ΍վྑ΋OSSͱͯ͠ਪਐ • άϩʔόϧͳΦʔϓϯαΠΤϯεج൫ͱͳͬͨ • ೔ຊ͔Β͸ి೾๏ͷࣄલڐՄݪଇͷͨΊߩݙͰ͖͍ͯͳ͍ Kenji Rikitake / IPSJ IOT51 3-SEP-2020 20

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೔ຊͷి೾؂ཧମ੍͕ ແઢͰͷ҉߸ར༻ʹ༩͑ΔӨڹ Kenji Rikitake / IPSJ IOT51 3-SEP-2020 21

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ݱࡏ͸ηΩϡϦςΟରࡦ͕ਝ଎ʹͰ͖ͳ͍ • ڞ௨伴҉߸͚ͩͰ͸ෆे෼ͳͨΊPKIج൫͕ඞཁ • GPS΍ADS-BͳͲ҉߸Λ࢖͍ͬͯͳ͍௨৴ํ͕ࣜࣾձͷࠜװΛ ࢧ͑Δঢ়گʹ͸ɺࣄલڐՄ͚ͩͰͳ͘ҧ๏ӡ༻΍ѱҙʹΑΔ๦ ֐Λܧଓత໢ཏతʹ؂ࢹ͠ਝ଎ʹऔΓక·Δ͜ͱ͕ඞཁ • ࣄલڐՄݪଇ͚ͩͰ͸ɺΦʔϓϯͳ҉߸ඪ४΍࣮૷Λਝ଎ʹ࠾ ༻Ͱ͖ͣɺةຆԽ๷ࢭ΁ͷରࡦ΍࣮ূ࣮ݧ΋ਝ଎ʹͰ͖ͳ͍ Kenji Rikitake / IPSJ IOT51 3-SEP-2020 22

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·ͱΊ ࠓޙͲͷΑ͏ʹ ೔ຊͷి೾؂ཧମ੍Λ ม͍͑ͯ͘΂͖͔ Kenji Rikitake / IPSJ IOT51 3-SEP-2020 23

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ແઢٕज़ͷΦʔϓϯԽ͸طఆͷࣄ࣮ ΦʔϓϯԽٕͨ͠ज़Λద੾ʹ؂ཧ͢ΔͨΊʹ ࣄલڐՄݪଇґଘ͔Βͷ୤٫͕ඞཁ Kenji Rikitake / IPSJ IOT51 3-SEP-2020 24

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ࠓ͙͢Ͱ͖Δ੍౓ͷվળ(1) • ࣄલਃ੥ͳࣗ͘༝ͳར༻͕ՄೳͳଳҬͷ֦ॆ • ࠃࡍن֨੒ཱલͷ௨৴ํࣜ΍ϓϩτίϧͷ࣮ݧͷࣗ༝Խ • ࣄલڐՄʹཔΒͳ͍ૹ৴ݩೝূج൫ͷ੔උ • ҧ๏ͳి೾͕ग़͍ͯΔલఏͰͷ؂ཧମ੍ͷݟ௚͠ • దਖ਼ͳར༻Λอূ͢ΔͨΊͷϞχλϦϯάମ੍ͷڧԽ Kenji Rikitake / IPSJ IOT51 3-SEP-2020 25

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ࠓ͙͢Ͱ͖Δ੍౓ͷվળ(2) • ػثͷมߋ͝ͱʹඞཁͳखଓͷ؆ུԽ͋Δ͍͸ഇࢭ • ӡ༻ར༻લఏͰͷੈք֤ࠃ֤஍Ҭͱͷ૬ޓೝূ • ݱߦͷ࣮ݧ౳Ͱͷ180೔ؒݶఆͷಛྫ੍౓ͷ֦ॆ • ໔ڐ৘ใͷσʔλϕʔε؂ཧͱࢴͷ໔ڐঢ়ͷഇࢭ • ୤ϋϯίͱϖʔύʔϨε͸೔ຊ੓෎ͷجຊํ਑ Kenji Rikitake / IPSJ IOT51 3-SEP-2020 26

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ຊൃදͷؔ࿈ݚڀใࠂ/࿦จ • ༧ߘ: ྗ෢݈࣍: ΠϯλʔωοτͱΦʔϓϯͳແઢٕज़ͷࠓޙ, Vol. 2020-IOT-51, No. 1, IPSJ, pp. 1--8 (2020). ISSN 2188-8787. ༧ߘͷPDFϑΝΠϧʢஶऀWebαΠτʣ 1 • Frissell, N. A., Miller, E. S., Kaeppler, S. R., Ceglia, F., Pascoe, D., Sinanis, N., Smith, P., Williams, R., and Shovkoplyas, A. (2014), Ionospheric Sounding Using Real‐Time Amateur Radio Reporting Networks, Space Weather, 12, 651– 656, doi: 10.1002/2014SW001132. 1 ͜͜ʹܝࡌͨ͠ஶ࡞෺ͷར༻ʹؔ͢Δ஫ҙ: ຊൃදͷ༧ߘͷஶ࡞ݖ͸৘ใॲཧֶձʹؼଐ͠·͢ɻຊஶ࡞෺͸ஶ࡞ ݖऀͰ͋Δ৘ใॲཧֶձͷڐՄͷ΋ͱʹஶऀͷWebαΠτʹܝࡌ͢Δ΋ͷͰ͢ɻ͝ར༻ʹ౰ͨͬͯ͸ʮஶ࡞ݖ๏ʯ ͳΒͼʹʮ৘ใॲཧֶձྙཧߝྖʯʹै͏͜ͱΛ͓ئ͍͍ͨ͠·͢ɻ Kenji Rikitake / IPSJ IOT51 3-SEP-2020 27