On the Source of Steep TEC Gradients That Impact GPS E.A. Araujo-Pradere 1, T.J. Fuller-Rowell 1, M. Fedrizzi 2, M.V. Codrescu 1 1 CIRES-University of.

Slides:

Advertisements

Similar presentations

University of Bath 4D ionisation dynamics during storms of the recent solar maximum Cathryn Mitchell, Ping Yin, Paul Spencer and Dmitriy Pokhotelov, University.

Advertisements

The day-to-day longitudinal variability of the global ionospheric density distribution: Preliminary results E.E. Pacheco and E. Yizengaw Institute for.

1 Effects of solar activity, co-rotating interaction regions, and climate change on thermospheric density during the solar cycle 23/24 minimum Stan Solomon.

MURI,2008 Electric Field Variability and Impact on the Thermosphere Yue Deng 1,2, Astrid Maute 1, Arthur D. Richmond 1 and Ray G. Roble 1 1.HAO National.

Ionosphere Climate Studied by F3 / COSMIC Constellation C. H. Liu Academia Sinica In Collaboration with Tulasi Ram, C.H. Lin and S.Y. Su.

CISM All-hands Meeting Boulder, CO Sept CMIT Simulations of the Initial Phase of Geomagnetic Storms Wenbin Wang, Jiuhou Lei, Alan Burns, Stan.

LONGITUDINAL DIFFERENCES IN THE EQUATORIAL SPREAD F CHARACTERISTICS BETWEEN VIETNAM AND BRAZIL Hoang Thai Lan, Abdu M. A, MacDougall J. W, Batista I.

I. U. Observatorio del Ebro, Universitat Ramon Llull Center for Atmospheric Research, University of Massachusets Lowell IRI/COST 296 WORKSHOP; July.

J C Foster MIT Haystack Observatory Yosemite 2002 Plasma Tails & Ionospheric SED.

Comparative Study of the Global Ionospheric Behavior During Solar Cycles and Minima Eduardo A. Araujo-Pradere 1,2, Dominic Fuller-Rowell 1,3,

DEFINITION, CALCULATION, AND PROPERTIES OF THE Dst INDEX R.L. McPherron Institute of Geophysics and Planetary Physics University of California Los Angeles.

“EQUATORIAL TEC OVER SOUTH AMERICAN SECTOR WITH DIFFERENT MAGNETIC DECLINATION ANGLES” P. A. B. Nogueira *1, M. A. Abdu 1, J. R. Souza 1, I. S. Batista.

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

Storm-time total electron content and its response to penetration electric fields over South America P. M. de Siqueira, E. R. de Paula, M. T. A. H. Muella,

Modelling the Thermosphere-Ionosphere Response to Space Weather Effects: the Problem with the Inputs Alan Aylward, George Millward, Alex Lotinga Atmospheric.

Low-latitude Ionospheric Sensor Network (LISN) C. E. Valladares, Boston College V. Eccles, Space Environment Corporation E. Kudeki, University of Illinois.

Geospace Variability through the Solar Cycle John Foster MIT Haystack Observatory.

1 Robert Schaefer and Joe Comberiate for the SSUSI Team Robert SchaeferJoe Comberiate (240) (240)

Ionospheric Effects during Severe Geomagnetic Storms John Foster MIT Haystack Observatory NASA CDAW Mar. 14, 2005.

Effects of ionospheric small- scale structures on GNSS G. WAUTELET Royal Meteorological Institute of Belgium Ionospheric Radio Systems & Techniques (IRST)

J. M. Forbes, E. K. Sutton, R. S. Nerem Department of Aerospace Engineering Sciences, University of Colorado, Boulder, Colorado, USA Sean Bruinsma, CNES.

How does the Sun drive the dynamics of Earth’s thermosphere and ionosphere Wenbin Wang, Alan Burns, Liying Qian and Stan Solomon High Altitude Observatory.

Altitude (km) January Global AverageTemperature (K) Pressure (hPa) With O( 3 P) Cooling WACCM-X The Whole Atmosphere Community Climate Model – eXtended.

Sub-ionospheric Point hmhm Ionosphere Earth Surface Ionospheric Piercing Point High Resolution GPS-TEC Gradients in the Northern Hemisphere Ionospheric.

High Altitude Observatory (HAO) – National Center for Atmospheric Research (NCAR) The National Center for Atmospheric Research is operated by the University.

Claudinei Rodrigues de Aguiar Federal University of Technology - Parana Paulo de Oliveira Camargo São Paulo State University.

How does energy from magnetic storms get transferred from high to low latitudes Anthea Coster, MIT Haystack Observatory How does energy from magnetic storms.

Ocean Circulation.

Ionospheric Electrodynamics & Low-Earth Orbiting Satellites (LEOS) J-M Noël, A. Russell, D. Burrell & S. Thorsteinson Royal Military College of Canada.

Scott M. Bailey, LWS Workshop March 24, 2004 The Observed Response of the Lower Thermosphere to Solar Energetic Inputs Scott M. Bailey, Erica M. Rodgers,

VTEC prediction using a recursive artificial neural networks approach in Brazil: initial results Engineer School - University of São Paulo Wagner Carrupt.

Plasma Density Structures in the Inner Magnetosphere Derived From RPI Measurements B. Reinisch 1, X. Huang 1, P. Song 1, J. Green 2, S. Fung 2 V. Vasyliunas.

Ionospheric Research at USU R.W. Schunk, L. Scherliess, J.J. Sojka, D.C. Thompson & L. Zhu Center for Atmospheric & Space Sciences Utah State University.

Effects of the Magnetosphere and Lower Atmosphere on the Ionosphere-Thermosphere System R.W. Schunk, L. Gardner, L. Scherliess, D.C. Thompson, J.J. Sojka.

Ocean Currents Ocean Density. Energy in = energy out Half of solar radiation reaches Earth The atmosphere is transparent to shortwave but absorbs longwave.

The Mesoscale Ionospheric Simulation Testbed (MIST) Regional Data Assimilation Model Joseph Comberiate Michael Kelly Ethan Miller June 24, 2013.

Mapping high-latitude TEC fluctuations using GNSS I.I. SHAGIMURATOV (1), A. KRANKOWSKI (2), R. SIERADZKI (2), I.E. ZAKHARENKOVA (1,2), Yu.V. CHERNIAK (1),

The Thermosphere/Ionosphere Response to Solar Activity During the October/November 2003 Storms P. R. Straus 1, G. Crowley 2, R. R. Meier 3, L. J. Paxton.

WG3 “Ionospheric Storms” Summary Report

The Geoeffectiveness of Solar Cycle 23 as inferred from a Physics-Based Storm Model LWS Grant NAG Principal Investigator: Vania K. Jordanova Institute.

Ionospheric irregularities observed with a GPS network in Japan TOHRU ARAMAKI[1],Yuichi Otsuka[1],Tadahiko Ogawa[1],Akinori Saito[2] and Takuya Tsugawa[2]

Ionospheric Assimilation Model for Space Weather Monitoring and Forecasting I. T. Lee 1 W. H. Chen 2, T. Matsuo 3,4, C. H. Chang 2,

University of Colorado/CIRES – NOAA/SWPC NADIR MURI, Boulder, CO, October, 2008 Mariangel Fedrizzi, Timothy J. Fuller-Rowell, Tomoko Matsuo Numerical.

Image credit: NASA Response of the Earth’s environment to solar radiative forcing Ingrid Cnossen British Antarctic Survey.

New Science Opportunities with a Mid-Latitude SuperDARN Radar Raymond A. Greenwald Johns Hopkins University Applied Physics Laboratory.

Characteristics and source of the electron density irregularities in the Earth’s ionosphere Hyosub Kil Johns Hopkins University / Applied Physics Laboratory.

Effects of January 2010 stratospheric sudden warming in the low-latitude ionosphere L. Goncharenko, A. Coster, W. Rideout, MIT Haystack Observatory, USA.

Energy inputs from Magnetosphere to the Ionosphere/Thermosphere ASP research review Yue Deng April 12 nd, 2007.

Postmidnight ionospheric trough in summer and link to solar wind: how, when and why? Mirela Voiculescu (1), T. Nygrén (2), A. Aikio(2), H. Vanhamäki (2)

30 April 2009 Space Weather Workshop 2009 The Challenge of Predicting the Ionosphere: Recent results from CISM. W. Jeffrey Hughes Center for Integrated.

Interminimum Changes in Global Total Electron Content and Neutral Mass Density John Emmert, Sarah McDonald Space Science Division, Naval Research Lab Anthony.

Radiation Belt Storm Probes Mission and the Ionosphere-Thermosphere RPSP SWG Meeting June 2009.

VT SuperDARN Group Joseph Baker Ground-Based Observations of the Plasmapause Boundary Layer (PBL) Region with.

Baker Tech SuperDARN Large-Scale Observations of the Sub-Auroral Polarization Stream (SAPS) From.

Coupled Thermosphere Ionosphere Plasmasphere Model with self-consistent Electrodynamics (CTIPe) Global thermosphere km, solves momentum, energy,

Impact of midnight thermosphere dynamics on the equatorial ionospheric vertical drifts Tzu-Wei Fang 1,2 R. Akmaev 2, R. Stoneback 3, T. Fuller-Rowell 1,2,

Space weather phenomena in the ionosphere and their effect on GNSS

S. Datta-Barua, Illinois Institute of Technology G. S. Bust, JHUAPL

The Ionosphere and Thermosphere GEM 2013 Student Tutorial

Atmosphere-Ionosphere Wave Coupling as Revealed in Swarm Plasma Densities and Drifts Jeffrey M. Forbes Department of Aerospace Engineering Sciences, University.

Ionospheric Models Levan Lomidze Center for Atmospheric and Space Sciences Utah State University CEDAR-GEM Student Workshop, June.

Center for Atmospheric & Space Sciences

Prospects for real-time physics-based thermosphere ionosphere models for neutral density specification and forecast Tim Fuller-Rowell, Mariangel Fedrizzi,

Seasonal dependence of the nighttime traveling ionospheric disturbances in the mid-latitude ionosphere A．Saito1,2, M.C. Kelley1, T. Tsugawa2, J.J. Makela1,

Ionosphere, Magnetosphere and Thermosphere Anthea Coster

Mid-latitude Electron Density Variations Under Magnetospheric Substorm Conditions As Determined From Istanbul Dynasonde Observations Aysegul Ceren MORAL,

Astrid Maute, Art Richmond, Ben Foster

Penetration Jet DMSP F April MLT

Space Weather Prediction Center/ NOAA, Boulder, Colorado, USA

The Upper Atmosphere: Problems in Developing Realistic Models

Presentation transcript:

On the Source of Steep TEC Gradients That Impact GPS E.A. Araujo-Pradere 1, T.J. Fuller-Rowell 1, M. Fedrizzi 2, M.V. Codrescu 1 1 CIRES-University of Colorado, NOAA-Space Environment Center 2 Instituto Nacional de Pesquisas Espaciais, Brazil. Now a NRC Research Associate at NOAA-SEC

SUMMARY Steep ionospheric gradients: Spatial gradients Temporal gradients. Some sources of ionospheric gradients (diverse, mixed and complex): Development of the neutral composition bulge Equatorial electrodynamics Trough and high latitude processes.

STORM Time Empirical Ionospheric Correction Model Gravity Waves Composition Bulge Electric Field

CTIM mean molecular mass NmF2 depletion

mean molecular mass latitudinal structure quiet conditions (kp = 2 + ) 40 o perturbed conditions (kp = 7) 40 o equatorsummer polewinter pole solar driven circulation, quiet conditions (kp = 0)

NOAA CORS (good spatial resolution and geographic coverage) 21 storms with a p ≥ 200, 10 days period for each one, average of 250 receivers per storm Good seasonal coverage. Data sources 191 receivers 137 receivers

summer :00 UT 06:00 UT 12:00 UT 18:00 UT 2000 – 07 (GAIM TEC)

2000 – 07 (GAIM TEC) ratios quiet conditions perturbed conditions ratio summer Combination of downwelling and the electrodynamics Upwelling and equatorward transport of the neutral composition Possible interpretations:

March 2001 – TEC vs. Lat. TEC (TECU)

00:00 UT 06:00 UT 12:00 UT 18:00 UT equinox (GAIM TEC)

quiet conditions perturbed conditions ratio equinox Combination of the electrodynamics and downwelling Upwelling and equatorward transport of the neutral composition Possible interpretations: “Auroral” processes (GAIM TEC) ratios

CTIP (physics based model) Trough: transport of the electron density by the high latitude convection E

animation window quiet reference November

VTEC ratio vs. time

CONCLUSIONS Steep ionospheric gradients can be spatial and temporal gradients. The sources of such gradients are diverse, mixed and complex, including, but not limited to, development of the neutral composition bulge, the equatorial electrodynamics, the trough and high latitude processes.