Institute of Geophysics & Planetary Physics University of California, Los Angeles (UCLA)

Dr. Endawoke Yizengaw 6844C Slichter Hall Los Angeles, CA 90095-1567 Phone: (310) 206-4380 FAX: (310) 206-3051 ekassie@igpp.ucla.edu

Selected Publications

Contact me for re-prints

Research Projects

AMBER (IHY-Africa)

AGREES (IHY-Africa)

Collaborators

Publications

What We Do?

My CV

The 2006 UCLA Chancellor's Award winner

Media Coverage

Data Center

Select Data Type RINEX_SOPAC Rinex_Cddisa Rinex_UCSD Rinex_Australia Rinex_France Rinex_South Africa (Trignet) Rinex_South Africa (HartRAO) Rinex_Ethiopia (UNAVCO site) Rinex_LEO COSMIC data set Rinex_FedSat GPS satellite positions (XYZ) Calculated GPS_TEC (NOAA) Calculated GPS_TEC (MIT) GPS Receiver Biases (DCB) IGS_GPS Receiver Biases (DCB) Jason TEC Topex TEC CINDI (C/NOFS data) DMSP data (ion drift-meter) ROCSAT-1 data (IPEI) SPIDR World Data Centre Coordinated Data center OMNI data center Data from WIND satellite GUVI_DATA IMAGE_EUV_DATA DEMETER SATELLITE DATA SATELLITE POSITION LOCATOR ACE REAL TIME (1,5MNT AND 1HR) Data ACE Level_2 (Verified) Data Geomagnetic Data Service Mag. Indices Mg II Index Ground-Based Magnetometer data INTERMAGNET DATA CENTER IGRF_Mag. Model Aurora Particle Imagery IRI_2001 Model SOHO Images SunSpot Number F10.7 Indices GPS Calendar Quiet and disturbed days Storm SC times (1932-presnt) GPS Receiver network (IGS) WAAS Sevice Avaliablity Amharic Online Dictionary

Space Weather Current Conditions

How much do we know about space weather?

Timeline of space weather understanding

Organized by Prof Mark Moldwin

Yizengaw, E., M. B. Moldwin, Y. Sahai, and R. de Jesus (2009), Strong Post-Midnight Equatorial Ionospheric Anomaly Observations during Magnetically Quiet Periods, J. Geophys. Res., (In press)

Yizengaw, E., and M. B. Moldwin (2009), African Meridian B-field Education and Research (AMBER) Array, Earth Moon Planet,104(1), 237-246, doi:10.1007/s11038-008-9287-2. ADS Abstract

Amory-Mazaudier, C., S. Basu, O. Bock, A. Combrink, K. Groves, T. Fuller Rowell, P. Lassudrie-Duchesne, M. Petitdidier, and E. Yizengaw, (2009), The use of Global Positioning System to derive atmospheric water vapor distribution for environmental applications, Earth Moon Planet,104(1), 263-270, doi:10.1007/s11038-008-9273-8. ADS Abstract

Yizengaw, E., M. B. Moldwin, D. Galvan, B. A. Iijima, A. Komjathy, and A. Mannucci (2008), The global plasmaspheric TEC and its contribution to the GPS TEC, J. Atmos. Solar-Terr. Phys., 70, 1541-1548. ADS Abstract.

Yizengaw, E., J. Dewar, J. MacNeil, M. B. Moldwin, D. Galvan, J. Sanny, D. Berube, and Bill Sandel (2008), The occurrence of Ionospheric Signatures of Plasmaspheric Plumes over Different Longitudinal Sectors, J. Geophys. Res., 113, A08318, doi:10.1029/2007JA012925. ADS Abstract.

Moldwin, M. B., E. Yizengaw, , D. K. Scherrer,M. C. Rabellosoares, and P. Reiff (2008), AGU Scientists Host Teacher Workshop in Ethiopia, Eos, Vol. 89, No. 10, 4 March 2008. ADS Abstract. Documentary (movie), produced by Geoffrey Haines- Stiles and NASA’s Passport to Knowledge team.

Yizengaw, E., M. B. Moldwin, P. L. Dyson, E. A. Essex (2007), Using Tomography of GPS TEC to Routinely Determine Ionospheric Average Electron Density Profiles, J. Atmos. Solar-Terr. Phys., 69, 314–321. ADS Abstract.

Yizengaw, E., P. L. Dyson, and E. A. Essex (2006), Tomographic observations of the topside ionospheric density distributions using the GPS receiver on FedSat, Adv. Space Res., 38, 2318-2323. ADS Abstract.

Yizengaw, E., M. B. Moldwin, P. L. Dyson, B. J. Fraser, and S. K. Morley (2006), First Tomographic Images of Ionospheric Outflows, Geophys. Res. Lett., 33, L20102, doi:10.1029/2006GL027698. ADS Abstract (GRL COVER PAGE). (AGU JOURNAL HIGHLIGHTS).

Yizengaw, E., M. B. Moldwin, and D. Galvan (2006), Ionospheric signatures of a plasmaspheric plume over Europe, Geophys. Res. Lett., 33, L17103, doi:10.1029/2006GL026597. ADS Abstract

Yizengaw, E., M. B. Moldwin, A. Komjathy, and A. J. Mannucci (2006), Unusual topside ionospheric density response to the November 2003 superstorm, J. Geophys. Res., 111, A02308, doi:10.1029/2005JA011433. ADS Abstract

Yizengaw, E., H. Wei, M. B. Moldwin, D. Galvan, L. L. Mandrake, A. Mannucci, and X. Pi (2005), The correlation between mid-latitude trough and the plasmapause, Geophys. Res. Lett., 32, L10102, doi:10.1029/2005GL022954. ADS Abstract

Yizengaw, E., and M. B. Moldwin (2005), The altitude extension of the mid-latitude trough and its correlation with plasmapause position, Geophys. Res. Lett.,32, L09105, doi:10.1029/2005GL022854. ADS Abstract (GRL COVER PAGE). (AGU JOURNAL HIGHLIGHTS).

Yizengaw, E., M. Moldwin, P. L. Dyson, and T. J. Immel (2005), The Southern Hemisphere ionosphere and plasmasphere response to the interplanetary shock event of 29-31 October 2003, J. Geophys. Res.,110, A09S30, doi:10.1029/2004JA010920. ADS Abstract

Yizengaw, E., P. L. Dyson, E. A. Essex, and M. B. Moldwin (2005), Ionosphere dynamics over the Southern Hemisphere during the 31 March 2001 severe magnetic storm using multi-instrument measurement data, Ann. Geophys. 23(3), 707-721. ADS Abstract

Yizengaw, E., E. A. Essex, and R. Birsa (2004), The Southern Hemisphere and Equatorial region ionization response for September 22, 1999 severe magnetic storm, Ann. Geophys. 22(8), 2765-2773. ADS Abstract

Parkinson, M. L., P. L. Dyson, M. Pinnock, J. C. Devlin, M. R. Hairston, E. Yizengaw, and P. J. Wilkinson (2002), Signatures of the midnight open-closed magnetic field-line boundary during balanced dayside and nightside reconnection, Ann. Geophys., 20(10), 1617-1630. ADS Abstract

Yizengaw, E., C.M. Hall, A.H. Manson, & C.E. Meek (1999), Nonvalidation of mesospheric horizontal wind fluctuations derived from temperature data via comparison with MF radar wind measurements, J. Geophys. Res. 104(D22), 27565-27572. ADS Abstract