FAST Summary Data
Some of the scientific data from the FAST project will be represented
as a series of summary plots devoted to the fields and particle experiments
The FAST SOC at
the University of California, Berkeley have made
these summary plots available in both Gif (.gif) and Common Data Format (CDF)
file forms for your viewing and downloading. In addition postsrcipt files (PS)
have been made available but only for one month spans (thus keeping a one month
backlog).
To select particular FAST summary data proceed to
the ...
A fairly accurate list of crossings of invariant latitude 70
degrees has been created from database information. Although
some of the list entries are derived from projected orbit values, their
times are generally within seconds of the true values. If time permits, the
list will be updated every Monday; otherwise, the list will be updated
sometime during the proceeding days. To view the
list, proceed to the...
The FAST Science Operations Center uses Interactive Data
Language (IDL) software to produce the available sumplots.
For help using FAST IDL with its particular library of procedures,
a detailed html page has been created which discusses the various
FAST IDL routines.
For a more technical description of some summary plot parameters and
contents, choose on of the following selections: (Note: some of the
specifications may be slightly outdated.)
[UCB/FAST]
-
[FAST SOC]
-
[FTP]
-
[SDT]
[Summary Data]
-
[SPRG]
-
[Related Links]
This page is maintained by
Michael Magpayo / magdaddy@sunspot.ssl.berkeley.edu
Time parameters for the summary plots are as follows:
- the time period of each summary plot is 20 minutes
- the time resolution will be one spin period (approximately 5s)
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The horizontal scale will include the following parameters:
- UT (hr:min)
- invariant latitude
- magnetic local time
- altitude
- geographic latitude of footprint
- geographic longitude of footprint
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The mode bar, located on the bottom of every summary plot,
has a horizontal axis representing time, with...
- the instrument mode number written at the beginning of the time line
- gray (or green) shading marking the time the instrument is in slow survey
- darker (or red) shading marking fast survey
- black holes in the middle of the bar during regular bursts
- bar-wide markers for high speed burst memory captures
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The coordinate system of the summary plots is as follows:
- the y-axis is along the spacecraft spin axis, positive
in the direction closest to westward
- the x-aixs is given by the Y x B Model
direction, positive being equatorward in the auroral zone
- the z-axis completes the right-hand coordinate system
(X x Y) and is mostly parallel to the model magnetic field
Note: the above coordinates have a discontinuity at the pole crossings.
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Summary plot contents for DC magnetic and electric fields include...
- the three components of the magnetic field (Bx, By,
Bz) minus the background magnetic field
- the x and z components of the electric field (obtained by spinfitting over
the ~5s spin period) with an amplitude range of +/- 150mV/m (Note that
the v x B field is not subtracted, and that it primarily
affects the y-component.)
- Angle between the spin plane and B
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Summary plot contents for AC magnetic and electric fields include...
- HF electric field spectrum (32 Hz - 2 MHz, 64 frequency bands)
- VLF electric field spectrum (32 Hz - 16 kHz, 64 frequency bands)
- ELF electric field spectrum (32 Hz - 16 kHz, 64 frequency bands)
- HF magnetic field spectrum (16.4 kHz - 2 MHz, 64 frequency bands)
- VLF magnetic field spectrum (32 Hz - 16.4kHz, 64 frequency bands)
- ELF magnetic field spectrum (32 Hz - 16.4 kHz, 64 frequency bands)
- total HF electric and magnetic field power (16.4 kHz - 2 MHz)
- total VLF electric and magnetic field power
- total ELF electric and magnetic field power
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Summary plot contents for electrons include...
- zero, 90 and 180 degree pitch angle electron energy flux
spectrograms
- pitch angle electron spectrogram at 1 keV
- pitch angle electron spectrogram at 100 keV
- integrated energy flux
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Summary plot contents for ions include...
- 90 and 180 degree pitch angle ion energy flux spectrogram
- 90 degree pitch angle O+ spectrogram
- H+ and O+ pitch angle spectrogram
integrated over energies from 50-100 eV
- H+ and O+ densities
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Summary plot contents for diagnostics include...
- the spacecraft potential relative to sphere 8
- the bias current to sphere 1
- the thermal current (measured from spher 2, 6 or 9) plotted only
when the sphere is in current mode
- Spin/sun and spin/magnetic field angles. The angles between the spin axis
and the sun direction and between the spin axis and the magnetic field
- the three components of the electric field with an amplitude range of
+/- 1.6 V/m (Note that v x B field is not subtracted)
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