Key parameters for data acquired before December 8, 1998 are designated K0 paramters. An overview of them is
presented on the KP summary plots described below.
The K0 Key Parametr 24 hour summary plot has 5 panels. example kp plot
More information about TIMAS Key Parameters (including pointers to three different software packages
to access them) is available on-line
Only a few of the quality and density key parameters are given on
the KP0 summary plot.
NOTES:A low value of
the H+ quality parameter indicates that either the H+
signal detected by TIMAS is too low for reliable measurements
or the background counting rate is too high for reliable
measurements. The full timas key parameter data set contains
data quality parameters for each mass constituent.
The Three KP0 Energy Ranges are TIMAS mode dependent
The TIMAS KP0 Velocity Coordinate system is non standard
The NASA CDAWeb Provides graphical displays of
Additional TIMAS K0 Key Parameters
- The top panel presents the H+ density from the
complete energy range sampled by the TIMAS instrument. Depending on
the the date and instrument mode this could be:
- 0.015-22 keV/e (reduced energy used from 3/17 to 17:35 on 6/26/96)
- 0.015-33 keV/e (full energy mode used after 6/26/96.
- Because of on-board software anomolies, data from the 0.015-2.2 keV/e low
energy range mode are not available in the TIMAS key parameter data set.
- The second panel presents the He++/H+ density ratio
- The third panel presents the O+/H+ density ratio
- The fourth panel presents the He+/H+ density ratio
- The bottom panel presents the geometic average of the
three H+ quality parameters.
- IMPORTANT:A low value of
the H+ quality parameter indicates that either the H+
signal detected by TIMAS is too low for reliable measurements
or the background counting rate is too high for reliable
measurements. The full timas key parameter data set contains
data quality parameters for each mass constituent as noted above
Data gaps appear because of spacecraft or instrumental anomolies
which are noted in the Timas major event log
Prepared by WK (Bill) Peterson, May 2008.