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Article
Solar Terrestrial Relations Observatory (STEREO) Observations of Stream Interaction Regions in 2007 – 2016: Relationship with Heliospheric Current Sheets, Solar Cycle Variations, and Dual Observations
We have conducted a survey of 575 slow-to-fast stream interaction regions (SIRs) using Solar Terrestrial Relations Observatory (STEREO) A and B data, analyzing their properties while extending a Level-3 data prod...
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Article
The Magnetic Field Geometry of Small Solar Wind Flux Ropes Inferred from Their Twist Distribution
This work extends recent efforts on the force-free modeling of large flux rope-type structures (magnetic clouds, MCs) to much smaller spatial scales. We first select small flux ropes (SFRs) by eye whose durati...
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Article
Open AccessInterstellar Map** and Acceleration Probe (IMAP): A New NASA Mission
The Interstellar Map** and Acceleration Probe (IMAP) is a revolutionary mission that simultaneously investigates two of the most important overarching issues in Heliophysics today: the acceleration of energe...
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Article
Deep Solar Activity Minimum 2007 – 2009: Solar Wind Properties and Major Effects on the Terrestrial Magnetosphere
We discuss the temporal variations and frequency distributions of solar wind and interplanetary magnetic field parameters during the solar minimum of 2007 – 2009 from measurements returned by the IMPACT and PL...
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Article
Open AccessThe Heliospheric Plasma Sheet Observed in situ by Three Spacecraft over Four Solar Rotations
In this paper we present in situ observations of the heliospheric plasma sheet (HPS) from STEREO-A, Wind, and STEREO-B over four solar rotations in the declining phase of Solar Cycle 23, covering late March throu...
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Article
Open AccessTemporal Evolution of the Solar-Wind Electron Core Density at Solar Minimum by Correlating SWEA Measurements from STEREO A and B
The twin STEREO spacecraft provide a unique tool to study the temporal evolution of the solar-wind properties in the ecliptic since their longitudinal separation increases with time. We derive the characterist...
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Article
Open AccessSolar-Wind Bulk Velocity Throughout the Inner Heliosphere from Multi-Spacecraft Measurements
We extrapolate solar-wind bulk velocity measurements for different in-ecliptic heliospheric positions by calculating the theoretical time lag between the locations. The solar-wind bulk velocity dataset is obta...
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Article
Open AccessMulti-Spacecraft Observations: Stream Interactions and Associated Structures
The stream interaction region (SIR), formed when a fast stream overtakes a preceding slow stream, is the predominant large-scale solar wind structure at this early phase of the STEREO mission. Using multi-spac...
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Article
Open AccessIn Situ Observations of Solar Wind Stream Interface Evolution
The heliocentric orbits of the two STEREO satellites are similar in radius and ecliptic latitude, with separation in longitude increasing by about 45° per year. This arrangement provides a unique opportunity t...
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Article
Open AccessTemporal Evolution of the Solar Wind Bulk Velocity at Solar Minimum by Correlating the STEREO A and B PLASTIC Measurements
The two STEREO spacecraft with nearly identical instrumentation were launched near solar activity minimum and they separate by about 45° per year, providing a unique tool to study the temporal evolution of the...
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Article
Open AccessOptimized Grad – Shafranov Reconstruction of a Magnetic Cloud Using STEREO-Wind Observations
We present results on the geometry of a magnetic cloud (MC) on 23 May 2007 from a comprehensive analysis of Wind and STEREO observations. We first apply a Grad – Shafranov reconstruction to the STEREO-A plasma an...
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Article
Open AccessSmall Solar Wind Transients and Their Connection to the Large-Scale Coronal Structure
It has been realized for some time that the slow solar wind with its embedded heliospheric current sheet often exhibits complex features suggesting at least partially transient origin. In this paper we investi...
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Article
Open AccessSolar Wind Sources in the Late Declining Phase of Cycle 23: Effects of the Weak Solar Polar Field on High Speed Streams
The declining phases of solar cycles are known for their high speed solar wind streams that dominate the geomagnetic responses during this period. Outstanding questions about these streams, which can provide t...
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Article
Open AccessA Multispacecraft Analysis of a Small-Scale Transient Entrained by Solar Wind Streams
The images taken by the Heliospheric Imagers (HIs), part of the SECCHI imaging package onboard the pair of STEREO spacecraft, provide information on the radial and latitudinal evolution of the plasma compresse...
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Article
Open AccessMultispacecraft Observations of Magnetic Clouds and Their Solar Origins between 19 and 23 May 2007
We analyze a series of complex interplanetary events and their solar origins that occurred between 19 and 23 May 2007 using observations by the STEREO and Wind satellites. The analyses demonstrate the new opportu...
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Article
Open AccessTheoretical modeling for the stereo mission
We summarize the theory and modeling efforts for the STEREO mission, which will be used to interpret the data of both the remote-sensing (SECCHI, SWAVES) and in-situ instruments (IMPACT, PLASTIC). The modeling...
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Article
Open AccessThe Plasma and Suprathermal Ion Composition (PLASTIC) Investigation on the STEREO Observatories
The Plasma and Suprathermal Ion Composition (PLASTIC) investigation provides the in situ solar wind and low energy heliospheric ion measurements for the NASA Solar Terrestrial Relations Observatory Mission, wh...
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Article
The Solar Terrestrial Relations Observatory (STEREO) Education and Outreach (E/PO) Program
The STEREO mission’s Education and Outreach (E/PO) program began early enough its team benefited from many lessons learned as NASA’s E/PO profession matured. Originally made up of discrete programs, by launch...
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Chapter
The Plasma and Suprathermal Ion Composition (PLASTIC) Investigation on the STEREO Observatories
The Plasma and Suprathermal Ion Composition (PLASTIC) investigation provides the in situ solar wind and low energy heliospheric ion measurements for the NASA Solar Terrestrial Relations Observatory Mission, wh...
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Chapter
The Solar Terrestrial Relations Observatory (STEREO) Education and Outreach (E/PO) Program
The STEREO mission’s Education and Outreach (E/PO) program began early enough its team benefited from many lessons learned as NASA’s E/PO profession matured. Originally made up of discrete programs, by launch ...
