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Space weather phenomena in the ionosphere and their effect on GNSS

IPXX ICAO ISTF/4 New Delhi, India, 5th to 7th February 2014. Space weather phenomena in the ionosphere and their effect on GNSS. (Presented by Japan). SUMMARY

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Space weather phenomena in the ionosphere and their effect on GNSS

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  1. IPXXICAO ISTF/4 New Delhi, India, 5th to 7th February 2014 Space weather phenomena in the ionosphere and their effect on GNSS (Presented by Japan) SUMMARY This paper presents a short review of major space weather phenomena observed in mid- and low-latitude ionosphere. Their effect on GNSS also mentioned.

  2. Sudden Ionospheric Disturbance (SID) SOHO/SEM EUV [count/s] GOES X-ray flux [W/m2] 35 GPS TEC [TECU] 0 TIMED/GUVI O, N2 [R] 10 15 UT [hour] [Tsurutani et al., 2005] [Tsugawa et al., 2007]

  3. Sudden Ionospheric Disturbance (SID)

  4. Ionospheric Storm JST One-month Average Negative Storm Wakkanai foF2 [MHz] Okinawa Positive Storm Kp JST (UT+9h)

  5. Ionospehric Storm

  6. Equatorial Ionization Anomaly 20:40 JST, 23 Jan 2002 20:40 JST, 24 Jan 2002

  7. Equatorial Ionization Anomaly

  8. Storm enhanced density (SED) [Foster et al., JGR, 2005]

  9. Short summary of SED

  10. GPS-TEC Observations for Space Weather Absolute TEC ROTI (~10km scale irregularity) Loss-of-Lock (~100m scale irregularity) 12:20 UT (21:20 JST) 12:40 UT (21:40 JST) 13:00 UT (22:00 JST) 3D simulation of plasma bubble [Courtesy of Dr. T. Yokoyama (NICT) ]

  11. Short summary of EPB

  12. Traveling Ionospheric Disturbances (TID) Large -scale TID (LSTID) [Tsugawa et al., JGR., 2003] Medium -scale TID (MSTID) [Tsugawa et al., GPS solut., 2007]

  13. Traveling Ionospheric Disturbances (TID)

  14. Summary of Ionospheric Space Weather Phenomena Solar Act./ Mag. Storm dependence SED Amplitude Large SID LSTID Med. Ion. Strom Eq. Ion. Anomaly Small Plasma Bubble Lower Atm. dependence MSTID Sporadic E 10km 100km 1000km Global Spatial Scale

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