POLAR TIMAS
*****FLUX_SRUVEY_A******
SUMMARY PLOTS
The plots labeled labeled Flux_survey_A are the new standard TIMAS browse data product introduced in 2007.
They replace the flx type plot that was initially provided.
- The four color panels provide full day 32 spin (192 second) omnidirectional energy time spectrograms for H+, O+, He+ and He++.
- The number flux in units of (cm^2-s-sr-keV/e)^-1 are encoded using the color bar on the right.
- Short intervals of missing data are common. They arise from problems with the telemetry stream quality.
- TIMAS suffered a high voltage breakdown on December 8, 1998. The event made the instrumental response below ~ 700 eV extremely
non-linear and degraded angular resolution. FLUX plots produced for intervals after December 8, 1998, have a reduced energy range
reflecting the reduced capability of the TIMAS instrument after this date.
- See the Major Event Log for information about the reasons for longer intervals of missing data.
- Similar plots for shorter time intervals, shorter averaging intervals with associated angular distribution plots and ascii files the
fluxes displayed as well as densities and velocities derived from them can be produced using the MRDF interactive
plot generation tool
- The line and number panel labeled BCR ICP and E Range on the left
- The solid line gives the Background Counting Rate (BCR) in a log scale. No scale is indicated.
Values near the top of the panel indicate regions where the signal (and therefore the
information in the color panels above) is degraded because of high background counting rates.
- The color of the BCR rate line indicates instrumental status. Green indicates OK. Orange
indicates that caution should be used in applying the data. Red indicates that the data are
not valid.
- The TIMAS mode in use at the time is indicated by its ICP Table #. For a description of
TIMAS modes by ICP table # see the TIMAS Mode description page
- The color of the solid line above the UT information encodes the energy range sampled by
the TIMAS instrument. Green indicates full ( 15 eV < E/q < 33 keV). Orange indicates the
reduced energy range ( 15 eV < E/q < 25 keV ). Red indicates the low energy range ( 15 eV <
E/q < 2 keV ).
- Information about the orbit in tabular format
- UT: Universal time in hours:minutes
- R(Re): Geocentric distrance of Polar in units of Earth radii
- L(Re): McIlwain L parameter at the location of Polar
- MLT(Hr): Magnetic Local Time at the location of Polar in decimal hour format
- MagLAT: Geomagnetic Latitude at the location of Polar in degrees.
- InvLat: Invariant Latitude at the location of Polar in degrees.
Prepared by WK (Bill) Peterson, May, 2008.