Iterative Interplanetary Scintillation (IPS) Analyses During the Parker Solar Probe Close Solar Solar Passes
Abstract
We at the University of California, San Diego (UCSD) have developed a time-dependent three-dimensional (3-D) reconstruction technique that provides volumetric maps of density and velocity by iteratively fitting a kinematic or the ENLIL 3-D MHD model to interplanetary scintillation (IPS) observations. This system is compared with NOAA- and NASA-provided in-situ spacecraft measurements, and is used for real time predictions of solar wind parameters at Earth or globally (see the UCSD website https://ips.ucsd.edu). Currently used with data from ISEE, Japan, we have also integrated this system with data from Worldwide IPS Stations (WIPSS) network groups to increase both spatial and temporal coverage when these data are available. Some of these stations, especially LOFAR, centered in the Netherlands, currently operate in "campaign" mode only during periods of interest when the Parker Solar Probe (PSP) makes close passes to the Sun. The UCSD 3-D iterative reconstruction technique is unique in its ability to provide a low-resolution seamless extension of density and velocity parameters measured in situ, outward into the surrounding interplanetary medium at the resolution of the volumetric data. We here present analyses using archival data sets from both ISEE and LOFAR, that also include both kinematic and ENLIL models during PSP close passes of the Sun. These analyses also show the location of Solar Orbiter within the 3-D reconstructed volumes.
- Publication:
-
43rd COSPAR Scientific Assembly. Held 28 January - 4 February
- Pub Date:
- January 2021
- Bibcode:
- 2021cosp...43E.947J