GPS observations at quasi-conjugate points under disturbed conditions

• Autorzy: Momani M.A. , Mohd Ali M.A. , Yatim B. , Abdullah M. , Misran N.
• Języki publikacji: EN

Abstrakty

EN

The conjugacy effects of the GPS scintillation activities during the geomagnetic storms of October 2003, November 2003 and July 2004 have been investigated at the approximately geomagnetically conjugate stations: Scott Base, Antarctica (SBA) and Resolute Cornwallis Island (RESO) in the high Arctic region. The measurements aim at investigation of the similarities and differences of the scintillation activities occurring at the conjugate points in the polar regions under storm conditions and examine the relationship between the Storm Enhanced Density (SED) and scintillation activity. The measurements of the scintillation activities obtained from total scintillation index during these storm periods at both hemispheres showed asymmetry in the ionospheric scintillation occurrence at the conjugate points. Pronounced scintillation activity was observed at the nightside hemisphere with the total scintillation index higher than at the dayside hemisphere. The results also show that the durations of severe scintillation activity were longer at the nightside hemisphere. The measurements showed that the intense scintillation periods were corresponding to the presence of the SED events where more pronounced SED events were observed over the nightside hemisphere.

Słowa kluczowe

EN

geomagnetic storm; scintillation; GPS; TEC; SED

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2008
• Tom: Vol. 56, no. 4
• Strony: 1179--1201
• Opis fizyczny: Bibliogr. 47 poz.

Twórcy

autor

Momani M.A.

autor

Mohd Ali M.A.

autor

Yatim B.

autor

Abdullah M.

autor

Misran N.

• Faculty of Engineering, Universiti Kebangsaan Malaysia, Bangi, Malaysia,

Bibliografia

• AIUB, Astronomisches Institut Universität Bern (2005), Differential GPS code biases (DCBs), http://www.cx.unibe.ch/aiub/ionosphere.html.
• Balan, N., G.J. Bailey, R. Balachandran Nair, and J.E. Titheridge (1994), Nighttime enhancements in ionospheric electron content in the northern and southern hemispheres, J. Atmos. Terr. Phys. 56, 1, 67-79, DOI: 10.1016/0021-9169 (94)90177-5.
• Baran, L.W., I.I. Ephishov, and I.I. Shagimuratov (2001), Ionospheric total electron content behaviour during November 1997 storm, Phys. Chem. Earth C 26, 5, 341-345, DOI: 10.1016/S1464-1917(01)00010-1.
• Basu, S., K. Groves, J. Quinn, and P. Doherty (1999), A comparison of TEC fluctuations and scintillations at Ascension Island, J. Atmos. Terr. Phys. 61, 1219-1226, DOI: 10.1016/S1364-6826(99)00052-8.
• Beach, T.L. (1998), Global positioning system studies of equatorial scintillations, PhD Thesis, Cornell University.
• Bhattacharyya, A., T. Beach, and S. Basu (1999), GPS studies of TEC variations and equatorial scintillations, Ionospheric Effects Symp. 4-6 May 1999, Alexandria, VA.
• Biktash, L. (2005), Role of the magnetospheric and ionospheric currents in generation of equatorial scintillations during geomagnetic storms, Paper presented at 11th Intern. Ionospheric Effects Symp. 3-5 May 2005, Alexandria, VA.
• Briggs, B.H., and I.A. Parkins (1963), On the variation of radio star and satellite scintillations with zenith angle, J. Atmos. Terr. Phys. 25, 339-365.
• Buonsanto, M.J. (1999), Ionospheric storms - A review, Space Sci. Rev. 88, 563-601, DOI: 10.1023/A:1005107532631.
• Coster, A., S. Skone, C. Mitchell, G. de Franceschi, L. Alfonsi, and V. Romano (2004), Global studies of GPS scintillation, NTM 2004: Session E3 (abstracts).
• Coster, A.J., M. Colerico, J. Foster, B. Rideout, F. Rich, and B. Taylor (2006), Magnetic conjugacy of storm enhanced density. Abstract: Coster 31370. National Radio Science Meeting, 4-7 January 2006, University of Colorado, Boulder.
• Danilov, A.D., and J. Lastovicka (2001), Effects of geomagnetic storms on the ionosphere and atmosphere, Int. J. Geomag. Aeron. 2, 209-224.
• Ephishov, I., L.W. Baran, I.I. Shagimuratov, and G.A. Yakimova (2000), Comparison of total electron content obtained from GPS with IRI, Phys. Chem. Earth C 25, 4, 339-342, DOI: 10.1016/S1464-1917(00)00028-3.
• Forster, M., and N. Jakowski (2000), Geomagnetic storm effects on the topside ionosphere and plasmasphere: A compact tutorial and new results, Surv. Geophys. 21, 47-87, DOI: 10.1023/A:1006775125220.
• Forte, B., S. Skone, and V. Hoyle (2004), Ionospheric response to October 2003 storm through GPS scintillation data, Proc. 35th COSPAR Scientific Assembly, 18-25 July 2004, Paris.
• Fu, W., H. Shaowei, C. Rizos, M. Knight, and A. Finn (1999a), Real-time ionospheric scintillation monitoring, Proc. 12th Intern. Technical Meeting of the Satellite Division of the U.S. Inst. of Navigation GPS ION 99, 14-17 September 1999, Nashville, Tennessee.
• Fu, W., H. Shaowei, C. Rizos, M. Knight, and A. Finn (1999b), Some results on the nonparametric statistics of GPS signal scintillation, Intern. Symp. on GPS: Application to Earth Sciences and Interaction with other Space Geodetic Techniques, Tsukuba, Japan, 18-22 October.
• Fuller-Rowell, T.J., M.V. Codrescu, H. Rishbeth, R.J. Moffett, and S. Quegan (1996), On the seasonal response of the thermosphere and ionosphere to geomagnetic storms, J. Geophys. Res. 101, 2343-2353, DOI: 10.1029/ 95JA01614.
• Ho, C.M., A.J. Mannucci, U.J. Lindqwister, X. Pi, B.T. Tsurutani, L. Sparks, B.A. Iijima, B.D. Wilson, I. Harris, and M.J. Reyes (1998), Global ionospheric TEC variations during January 10, 1997 storm, Geophys. Res. Lett. 25, 2589- 2592, DOI: 10.1029/98GL00539.
• Hofmann-Wellenhof, B., H. Lichtenegger, and J. Collins (1994), Global Positioning System, Theory and Practice, 3rd ed., Springer-Verlag, Wien-New York.
• Hunsucker, R., and J. Hargreaves (2003), The High Latitude Ionosphere and its Effects on Radio Propagation, Cambridge University Press, Cambridge.
• Idenden, D. (1998), The thermospheric effects of a rapid polar cap expansion, Ann. Geophys. 16, 1380-1391, DOI: 10.1007/s00585-998-1380-3.
• IPS, Ionospheric Prediction Services (2003), Weekly Geophysical Report: November 2003 Magnetic Storm, http://www.ips.gov.au.
• IPS, Ionospheric Prediction Services (2004), Weekly Geophysical Report: July 2004 Magnetic Storm, http://www.ips.gov.au.
• Jakowski, N., H.D. Battac, B. Lazo, and L. Lois (1981), Seasonal variations of the columnar electron content of the ionosphere observed at Havana from July 1974 to April 1975, J. Atmos. Terr. Phys. 43, 7-11, DOI: 10.1016/0021-9169(81)90003-9.
• Jani, K., and K. Kotadia (1969), Changes in the ionosphere F2 layer at a place near the Sq-current focus during geomagnetic storms, Planet. Space Sci. 17, 2, 1949-1959, DOI: 10.1016/0032-0633(69)90133-0.
• Kumar, S., and A.K. Gwal (2000), VHF Ionospheric scintillations near the equatorial anomaly crest: solar and magnetic activity effects, J. Atmos. Sol.-Terr. Phys. 66, 157-167, DOI: 10.1016/S1364-6826(99)00090-5.
• Mannucci, A.J., B.D. Wilson, and C.D. Edwards (1993), A new method for monitoring the earth ionosphere total electron content using the GPS global network, Proc. ION GPS 93,1323-1332.
• Mitchell, C.N., L. Alfonsi, G. De Franceschi, M. Lester, V. Romano, and A.W. Wernik (2005), GPS TEC and scintillation measurements from the polar ionosphere during the October 2003 storm, Geophys. Res. Lett. 32.L12S03, DOI: 10.1029/2004GL021644.NASA (2005), From the Sun to the Earth: Polar, Wind and Geotail, http://wwwspof. gsfc.nasa.gov/Education/FAQs5.html#q67.
• Parkinson, M.L., M. Pinnock, J.A. Wild, M. Lester, T.K. Yeoman, S.E. Milan, H. Ye, J.C. Devlin, H.U. Frey, and T. Kikuchi (2005), Interhemispheric asymmetries in the occurrence of magnetically conjugate sub-auroral polarization streams, Ann. Geophys. 23, 1371-1390, SRef-ID: 1432-0576/ag/2005-23-1371.
• Pi, X., A. Mannucci, U. Lindqwister, and C. Ho (1997), Monitoring of global ionospheric irregularities using the worldwide GPS network, Geophys. Res. Lett. 24, 2283-2286, DOI: 10.1029/97GL02273.
• Rodger, A., and J. Aarons (1988), Studies of ionospheric F-region irregularities from geomagnetic mid latitude conjugate regions, J. Atmos. Terr. Phys. 50, 1, 63-72, DOI: 10.1016/0021-9169(88)90010-4.
• SCAR, Scientific Committee on Antarctic Research (2005), Interhemispheric conjugacy effects in solar-terrestrial and aeronomy research, ICESTAR proposal, submitted by the standing scientific group on physical sciences.
• Schaer, S. (1999), Mapping and predicting the earth's ionosphere using the global positioning system, PhD Thesis, University of Bern, Bern, Switzerland.
• Shilo, N., E.A. Essex, and A.M. Breed (2001), Scintillation and TEC study of the high latitude ionosphere over Casey station Antarctica. In: R.J. Morris and P.J. Wilkinson (eds.), ANARE Reports No. 146, 287-296.
• Siqing, L., J. Gong, J. Chao, and B. Xue (2001), Primary studying of relationship among coronal mass ejections, Bs events and geomagnetic storms, Proc. 6th APC-MCSTA Conf., 18-21 September 2001, Beijing, China.
• SOPAC (2005), Scripps Orbit and Permanent Array Center, http://garner.ucsd.edu. Spectrum (2003), IEEE spectrum newsletter: October 2003 storm, http://www. spectrum.ieee.org/WEBONLY/newslog/news10-30-03.html.
• Tate, B.S., and E.A. Essex (2001), Investigation of irregularities in the southern high latitude ionosphere, Adv. Space Res. 27, 8, 1385-1389, DOI: 10.1016/S0273-1177(01)00035-7.
• Titheridge, J., and M. Buonsanto (1988), A comparison of northern and southern hemisphere TEC storm behaviour, J. Atmos. Terr. Phys. 50, 763-780, DOI:10.1016/0021-9169(88)90100-6.
• Tsai, Dong-Ying (2002), A study on the ionospheric scintillation from ground-based GPS observations, M.S. Thesis (advisor: Prof. Y.A. Liou), Institute of Space Sciences, National Central University, Taiwan, 69 pp.
• Tsugawa, T., K. Shiokawa, T. Ogawa, Y. Otsuka, A. Saito, and M. Nishioka (2004), Interhemispheric conjugacy of large scale traveling ionospheric disturbances, Proc. AGU 2004 Fall Meeting, 13-17 December 2004, San Francisco, USA.
• Van Dierendonck, A.J., J. Klobuchar, and Q. Hua (1993), Ionospheric scintillation monitoring using commercial single frequency C/A code receivers, Proc. ION GPS-93 Conf., 22-24 September 1993, Salt Lake City, Utah.
• Warnant, R. (1998), Detection of irregularities in the total electron content using GPS measurements application to a mid-latitude station, Acta Geod. Geoph. Hung. 33, 1, 121-128.
• Warnant, R., and E. Pottiaux (2000), The increase of the ionospheric activity as measured by GPS, Earth Planets Space 52, 1055-1060.
• Wielgosz, P. (2005), Private communication.