Other
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsh11b0714l&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #SH11B-0714
Other
2134 Interplanetary Magnetic Fields, 2194 Instruments And Techniques, 7522 Helioseismology
Scientific paper
We report initial results from a careful time series analysis of interplanetary magnetic field (IMF) data that were acquired by the magnetometer instrument on the ACE spacecraft during the interval January 1, 1998, through March 2001. We use 4-min average data in the RTN coordinate system and calculate the power spectra of various data time intervals using a fast Fourier transform algorithm. Typically ten orthogonal prolate spheroidal wavefunction tapers are used, with a time-bandwidth product of 5.5. The Rayleigh resolution varies from ~0.024 to ~0.15 microHz, depending upon the length of the data set. Of particular interest is the frequency band from 0 to 10 microHz, especially around ~5 microHz ( ~2.2 days) where we have previously reported evidence for a power enhancement in energetic particle data measured on the Ulysses spacecraft. The ACE IMF data show evidence for enhanced power near 5 microHz period in the total field component for the years 1998 and 1999. This is additional evidence of a deterministic component of the fluctuations in the IMF. In the year 2000, the background IMF power level was considerably higher and therefore masked the signal at this frequency. We also report on other prominent spectral features in this frequency range, as well as the overall spectral shape in the entire band 1 to 1000 microHz.
Lanzerotti Louis J.
Letourneaut L.
Maclennan Carol G.
Thomson David J.
No associations
LandOfFree
Time Series Analysis of Interplanetary Magnetic Field Data does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Time Series Analysis of Interplanetary Magnetic Field Data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Time Series Analysis of Interplanetary Magnetic Field Data will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1379814