Module 11/13/2001: Version 1.4
Available now from the lasp server.
_v03 Data files are now available and should be used
Descriptions of the file format
_v01 data files overstate He++ fluxes, and return fill data
in regions of high count rate.
_v02 Data files provide more accurate He++ fluxes. BUT there is
a software error in the file generation software that
leads to UNDER REPORTING the fluxes in regions of high count rate. High
count rates are found in the radiation belts (primarily backbround) and
in the cusp. Data from _V02 files should not be used for quantitaive
investigations of cusp fluxes.
_v03 Data files have been regenerated with corrected software.
Version 3 files are available now (6/3/02) from the PI team and will be submitted shortly to NASA's CDAWeb site at Goddard.
_v03 files will be available for all intervals with valid TIMAS data from March 17, 1996 to December 8, 1998 from CDAWeb
Source code and input data files
Known Problems with _v01 data files
Improvements available in _v02 data files
- Systematic overestimation of He++ fluxes
H+/He++ flux ratios derived from _v01 PAPCO data files
are not meaningful.
- Missing magnetometer data
Magnetometer data are not available for long stretches of
unfortunately interesting intervals. We are revising our
level_1 processing to obtain magnetometer data from a more
When magnetometer data are NOT available, an OMNI directional
flux is reported in the lowest pitch angle data bin and zero
in the other 11 bins. The TIMAS PAPCO module will display
data for these intervals ONLY if the OMNIDIRECTIONAL display
option is selected.
- Pitch angle data are NOT corrected for effects of plasma drift
- Energy flux data are NOT corrected for non zero space craft potentials
- Files created after 5/1/99 are in CDF 2.6 data format. Files created
before are in CDF 2.5 data format. If you can read some, but not all
TIMAS data files, check that you are using IDL 5.0+ and/or CDF 2.6+ software
Known Problems with the (1.3) release
- Display of energy spectra using the slice extent feature has
not been fully tested. Line plots of energy flux have been incorrect
for some cases. A patch for this problem
- Module Edit keys do not work with PAPCO_08 and earlier or
with PAPCO_09 obtained before April 24, 1999. Update your
main PAPCO to a current version!
Known Problems with the (1.2) release
- Module Crashes when attempting to plot more than 24 hours
of data either simultaneously or sequentially. Work around is to
exit PAPCO and restart after each long (greater than 16 hour) data
Known Problems with the (1.1) release
The TIMAS module does not support remote data access.
Under PAPCO_09 There is an error in data file selection. When a data
file for a requested year/month/day is not available, the current
module will use data from an available year/month/day and present
it as data from the requested day! This problem does not exist under
PAPCO_08 and earlier.
Zoom mode works on time axis only
Automatic Z scaling may fail with some data
A small number ( <<1% ) of data records have an incorect time. These
records show up in the PAPCO plots as black bars of 12 seconds duration.
Problems in earlier versions that have been corrected
- The crashing associated with processing multiple long data
intervals has been significantly reduced.
- The date selection problem has been fixed by making the TIMAS
module Y2K compliant in version 1.2.
V1.1 fixed bug that caused timas_make_spec_matrix to crash when high-res
data was requested, but only low-res data existed. This is the case for
almost all intervals of He+ and some intervals of He++.
Now the panel is not plotted and a message is printed in the log window
that no data meets the selection criteria.
Incorrect fluxes in most He+ and some other data in the energy channel centered
on 33 keV/e in data files produced before 4/3/98.
We are in the process of regenerating all data files.
Conflicts with Hydra fixed in version 0.3
Postscript output doesn't work fixed in version 0.3
The module has only been tested on Sun UNIX systems. Data are read and
manipulated ONLY with IDL routines. In principle the module should work
on any platform that supports IDL and is compatible with the CDF file format
we use. Currently we are using CDF 2.5, but we will be moving to CDF 2.6
later this year. CDF 2.6 files are ONLY compatible with IDL 5.0. CDF 2.5
files are compatible with IDL 4.0 and 5.0
Input data files will be archived and distributed
on-line and by CDROM when files are available from the PWG
hour SPECTROGRAMS of existing data files are available at <!a href=http://lasp.colorado.edu/timas/data/inventory_plots/>our
If there is no plot for the day you are interested in. We have not
yet produced the PAPCO data file.
Input data files for the TIMAS PAPCO module are available for 24 hour UT
day intervals for selected days from several sources
Requests for production of TIMAS data in PAPCO format not available from
NSSDC or the POLAR/CHDF should be directed to W.K.
Peterson Please indcate why you are interested in the TIMAS data.
PAPCO software, including the TIMAS module, is available from the PAPCO
and HYDRA sites noted below
on how to set up PAPCO to run at Palo Alto
Prepared by Bill Peterson
Last updated 09/28/2005 by Daryl Carr