An interhemispheric comparison of GPS phase scintillation with auroral emission observed at the South Pole and from the DMSP satellite

The global positioning system (GPS) phase scintillation caused by highlatitude
ionospheric irregularities during an intense high-speed stream (HSS) of the solar wind from April 29 to May 5, 2011, was observed using arrays of GPS ionospheric scintillation and total electron content monitors in the Arctic and Antarctica. The one-minute phase-scintillation index derived from the data sampled at 50 Hz was complemented by a proxy index (delta phase rate) obtained from 1-Hz GPS data. The scintillation occurrence coincided with the aurora borealis and aurora australis
observed by an all-sky imager at the South Pole, and by special sensor ultraviolet scanning imagers on board satellites of the Defense Meteorological Satellites Program. The South Pole (SP) station is approximately
conjugate with two Canadian High Arctic Ionospheric Network stations on Baffin Island, Canada, which provided the opportunity to study magnetic conjugacy of scintillation with support of riometers and
magnetometers. The GPS ionospheric pierce points were mapped at their actual or conjugate locations, along with the auroral emission over the South Pole, assuming an altitude of 120 km. As the aurora brightened
and/or drifted across the field of view of the all-sky imager, sequences of
scintillation events were observed that indicated conjugate auroras as a
locator of simultaneous or delayed bipolar scintillation events. In spite of the greater scintillation intensity in the auroral oval, where phase scintillation
sometimes exceeded 1 radian during the auroral break-up and substorms, the percentage occurrence of moderate scintillation was highest in the cusp. Interhemispheric comparisons of bipolar scintillation maps show that the scintillation occurrence is significantly higher in the southern cusp and polar cap.

Alfonsi, L., L. Spogli, G. De Franceschi, V. Romano, M.
Aquino, A. Dodson and C.N. Mitchell (2011). Bipolar
climatology of GPS ionospheric scintillation at
solar minimum, Radio Sci., 46, RS0D05; doi:10.1029/
2010RS004571.
Basu, S., E.J. Weber, T.W. Bullett, M.J. Keskinen, E.
MacKenzie, P. Doherty, R. Sheehan, H. Kuenzler, P.
Ning and J. Bongiolatti (1998). Characteristics of
plasma structuring in the cusp/cleft region at Svalbard,
Radio Sci., 33, 1885-1899; doi:10.1029/98RS01597.
Belcher, J.W., and L. Davis Jr. (1971). Large-amplitude
Alfvén waves in the interplanetary 458 medium, 2,
J. Geophys. Res., 76, 3534-3563.
Carlson, H.C. (2012). Sharpening our thinking about
polar cap ionospheric patch morphology, research,
and mitigation techniques, Radio Sci., 47, RS0L21;
doi:10.1029/2011RS004946.
Donovan, E., T. Trondsen, L. Cogger and B. Jackel (2003).
Auroral imaging within the Canadian CANOPUS
and NORSTAR projects, Sodankylä Geophysical
Observatory Publications, 92, 109-112.
Ebihara, Y., R. Kataoka, A.T. Weatherwax and M. Yamauchi
(2010). Dayside proton aurora associated with
magnetic impulse events: South Pole observations,
J. Geophys. Res., 115, A04301; doi:10.1029/2009JA0
14760.
Feldstein, Y.I., and G.V. Starkov (1967). Dynamics of auroral
belt and polar geomagnetic disturbances,
Planet. Space Sci., 15, 209-230.
Ghoddousi-Fard, R., and F. Lahaye (2012). Monitoring
GPS phase rate variations as a proxy scintillation
index, Abstract G012-1465908, GNSS and the Atmosphere,
AGU Fall Meeting, San Francisco, 3-7
December 2012.
Holzworth, R.H., and C.-I. Meng (1975). Mathematical representation of the auroral oval, Geophys. Res. Lett., 2, 377-380.
Huttunen, K.E.J., R. Schwenn, V. Bothmer and H.E.J. Koskinen (2005). Properties and geoeffectiveness of
magnetic clouds in the rising, maximum and early declining
phases of solar cycle 23, Annales Geophysicae,
23, 625-641; doi:10.5194/angeo-23-625-2005.
Jayachandran, P.T., et al. (2009). Canadian High Arctic
Ionospheric Network (CHAIN), Radio Sci., 44,
RS0A03; doi:10.1029/2008RS004046.
Kinrade, J., C.N. Mitchell, P. Yin, N. Smith, M.J. Jarvis,
D.J. Maxfield, M.C. Rose, G.S. Bust and A.T. Weatherwax
(2012). Ionospheric scintillation over Antarctica
during the storm of 5-6 April 2010, J. Geophys.
Res., 117, A05304; doi:10.1029/2011JA017073.
Laundal, K.M., and N. Østgaard (2009). Asymmetric auroral
intensities in the Earth's northern and southern
hemispheres, Nature 460, 491-493; doi:10.1038/
nature08154.
Li, G., B. Ning, Z. Ren and L. Hu (2010). Statistics of
GPS ionospheric scintillation and irregularities over
polar regions at solar minimum, GPS Solutions, 14
(4), 331-341; doi:10.1007/s10291-009-0156-x.
Liu, W.W. (2005). Canadian space environment program
and international living with a star, Adv. Space
Res., 35, 51-60.
Mann, I.R., D.K. Milling, I.J. Rae, L.G. Ozeke, A. Kale,
Z.C. Kale, K.R. Murphy, A. Parent, M. Usanova,
D.M. Pahud, V. Lee, E.-A. Amalraj, D.D. Wallis, V.
Angelopoulos, K.-H. Glassmeier, C.T. Russell, H.-
U., Auster and H.J. Singer (2008). The Upgraded
CARISMA Magnetometer Array in the THEMIS
Era, Space Sci. Rev., 141, 413-451; doi:10.1007/s1121
4-008-9457-6.
Motoba, T., K. Hosokawa, Y. Ogawa, N. Sato, A. Kadokura,
S.C. Buchert and H. Rème (2011). In-situ evidence
for interplanetary magnetic field induced tail
twisting associated with relative displacement of
conjugate auroral features, J. Geophys. Res., 116,
A04209; doi:10.1029/2010JA016206.
Newell, P.T., T. Sotirelis and S. Wing (2009). Diffuse,
monoenergetic, and broadband aurora: The global
precipitation budget, J. Geophys. Res. 114, A09207;
doi:10.1029/2009JA014326.
Nosé, M., et al. (2012). Wp index: A new substorm
index derived from high-resolution geomagnetic
field data at low latitude, Space Weather, 10, S08002;
doi:10.1029/2012SW000785.
Osherovich, V.A., J. Fainberg and R.G. Stone (1999).
Solar-wind quasi-invariant as a new index of solar
activity, Geophys. Res. Lett., 26, 2597-2600.
Østgaard, N., S.B. Mende, H.U. Frey, T.J. Immel, L.A.
Frank, J.B. Sigwarth and T.J. Stubbs (2004). Interplanetary magnetic field control of the location of substorm onset and auroral features in the conjugate hemispheres, J. Geophys. Res., 109, A07204; doi:10.1029/2003JA010370.
Paxton, L.J., D. Morrison, Y. Zhang, H. Kil, B. Wolven,
B.S. Ogorzalek, D.C. Humm and C.-I. Meng (2002).
Validation of remote sensing products produced by
the Special Sensor Ultraviolet Scanning Imager
(SSUSI) – a far-UV imaging spectrograph on DMSP
F16, Proc. SPIE, 4485, 338.
Prikryl, P., J.W. MacDougall, I.F. Grant, D.P. Steele,
G.J. Sofko and R.A. Greenwald (1999). Observations
of polar patches generated by solar wind Alfven wave
coupling to the dayside magnetosphere, Annales
Geophysicae, 17, 463-489.
Prikryl, P., P.T. Jayachandran, S.C. Mushini, D.
Pokhotelov, J.W. MacDougall, E., Donovan, E. Spanswick
and J.-P. St.-Maurice (2010). GPS TEC, scintillation
and cycle slips observed at high latitudes
during solar minimum, Annales Geophysicae, 28,
1307-1316.
Prikryl, P., P.T. Jayachandran, S.C. Mushini and R.
Chadwick (2011a). Climatology of GPS phase scintillation
and HF radar backscatter for the high-latitude
ionosphere under solar minimum conditions,
Annales Geophysicae, 29, 377-392; doi:10.5194/an
geo-29-377-2011.
Prikryl, P., et al. (2011b). Interhemispheric comparison
of GPS phase scintillation at high latitudes during
the magnetic-cloud-induced geomagnetic storm of
5-7 April 2010, Annales Geophysicae, 29, 2287-2304;
doi:10.5194/angeo-29-2287-2011.
Prikryl, P., R. Ghoddousi-Fard, B.S.R. Kunduri, E.G.
Thomas, A.J. Coster, P.T. Jayachandran, E. Spanswick
and D.W. Danskin (2013). GPS phase scintillation
and proxy indices observed at high latitudes during
a moderate geomagnetic storm, Annales Geophysicae,
31, 805-816; doi:10.5194/angeo-31-805-2013.
Rodger, A.S., and A.C. Graham (1996). Diurnal and seasonal
occurrence of polar patches, Annales Geophysicae,
14, 533-537.
Sato, N., T. Nagaoka, K. Hashimoto and T. Saemundsson
(1998). Conjugacy of isolated auroral arcs and
nonconjugate auroral breakups, J. Geophys. Res.,
103, 11641-11652; doi:10.1029/98JA00461.
Sato, N., A. Kadokura, Y. Ebihara, H. Deguchi and T.
Saemundsson (2005). Tracing geomagnetic conjugate
points using exceptionally similar synchronous auroras,
Geophys. Res. Lett., 32, L17109; doi:10.1029/
2005GL023710.
Smith, A.M., C.N. Mitchell, R.J. Watson, R.W. Meggs,
P.M. Kintner, K. Kauristie and F. Honary (2008). GPS
scintillation in the high arctic associated with an auroral arc, Space Weather, 6, S03D01; doi:10.1029/20 07SW000349.
Spanswick, E., E. Donovan, R. Friedel and A. Korth (2007). Ground-based identification of dispersionless
electron injections, Geophys. Res. Lett., 34,
L03101; doi:10.1029/2006GL028329.
Spogli L., Lu. Alfonsi, G. De Franceschi, V. Romano,
M.H.O. Aquino and A. Dodson (2009). Climatology
of GPS ionospheric scintillations over high and midlatitude
European regions, Annales Geophysicae,
27, 3429-3437.
Watson, C., P.T. Jayachandran, E. Spanswick, E.F. Donovan,
and D.W. Danskin (2011). GPS TEC technique
for observation of the evolution of substorm particle
precipitation, J. Geophys. Res., 116, A00I90;
doi:10.1029/2010JA015732.
Zhang, Y. and L.J. Paxton (2008). An empirical Kp-dependent global auroral model based on TIMED/GUVI FUV data, J. Atmosph. Solar-Terrest. Phys., 70, 1231-1242.