Multi-scale structure of the solar wind in the ecliptic at 1 AU undergoes significant evolution with the phase of the solar cycle. Wind spacecraft measurements during 1995 to 1998 and ACE spacecraft measurements during 1997 to 2005 were used to characterise the evolution of small-scale (∼1 min to 2 h) fluctuations in the solar wind speed vsw, magnetic energy density B2, and solar wind ε paramet...

Heavy ions in the solar wind are ideal for studying injection processes in the solar wind. We use composition data from Ulysses, ACE, and Wind to examine the properties of heavy ions from thermal energies to several 100 keVs. We show that these particles are observed to gain energy without any association with shocks. This paper provides a survey of recent observations of non-thermal properties...

The majority of electricity and heat in Colorado comes from coal and natural gas; however, renewable energy sources will play an integral role in the state’s energy future. Colorado is the 11th windiest state and has more than 250 sunny days per year. The objectives of this research are to: 1) determine which landcover classes are affiliated with high wind and solar potential; and 2) identify a...

[1] Much attention has been focused on the reaction of the magnetosphere to the solar wind during the recent extended solar minimum (2006–2010). Although this period was exceptionally quiet when categorized by some parameters (e.g., the number of sunspots) the solar wind still contained features which impacted the Earth’s magnetosphere and caused geomagnetic disturbances. Recurrent corotating i...

Main objectives of the paper were to examine the complementary nature of solar and wind energy in primary and in “useful” form. Analyses are performed on real, measured solar and wind potential data at the same site. Solar irradiation and wind power density have been assessed as primary forms. In order to examine effects of their complementarity in real applications, i.e. in power systems, a hy...

Introduction: Almost five years after the crash-landing of the sample return capsule of the Genesis solar wind collection mission, many of the originally defined high-priority goals [1] have been reached or prospects are very good that they will be reached within the next few years. None of the major goals had to be abandoned as a consequence of the crash. This contribution reviews some of the ...

The cross-polar potential drop 8pc and the lowlatitude asymmetric geomagnetic disturbance field, as indicated by the mid-latitude ASY-H magnetic index, are used to study the average magnetospheric response to the solar wind forcing for southward interplanetary magnetic field conditions. The state of the solar wind is monitored by the ACE spacecraft and the ionospheric convection is measured by ...

The acceleration and heating of the solar wind have been studied for decades using satellite observations and models. However, the exact mechanism that leads to solar wind heating and acceleration is poorly understood. In order to improve the understanding of the physical mechanisms that are involved in these processes a combination of modeling and observational analysis is required. Recent mod...

Aims. The classic Weber-Davis model of the solar wind is reconsidered by incorporating alpha particles and by allowing the solar wind to flow out of the equatorial plane in an axisymmetrical configuration. Methods. In the ion momentum equations of the solar wind, the ion gyro-frequency is many orders of magnitude higher than any other frequency. This requires that the difference between proton ...

PG Student, Dept of EEE, Annamacharya Institute of Technology & Sciences, Rajampet, Andhra Pradesh, India Assistant Professor, Dept of EEE, Annamacharya Institute of Technology & Sciences, Rajampet, India Professor & Head of the Department, Dept of EEE, Annamacharya Institute of Technology & Sciences. E-Mail: [email protected] Abstract:This paper presents a dynamic modeling and control stra...