PRASSADCO
program for the IMSC and ICE instruments on the DEMETER spacecraft
Ondrej Santolik (
)
and Frantisek Nemec, Charles University, Prague
10 July 2005, last modified on 23 November 2005
Purpose:
Analysis of calibrated level-1 ELF wave data obtained during the burst mode, either by the ICE
instrument ("1130" files), or the IMSC instrument ("1135" files) or both of them.
These files are generated by the
DEMETER mission control center at the LPCE/CNRS Orleans, France.
PRASSADCO is a computer program designed to analyze multicomponent measurements of electromagnetic waves.
It implements methods used to estimate polarization and propagation parameters,
such as the degree of polarization, sense of elliptic polarization and axes of polarization ellipse,
the wave vector direction, and the Poynting vector.
The results can be represented in different visual and numerical formats.
Instructions:
- Download files
pras.pro (2 kB),
topra.idl (660 kB),
pra_template.ini (8kB), and the example input files
example/DMT_N1_1135_20050613_190930_20050613_194259_B0FIELD.DAT (4.3 MB), and
example/DMT_N1_1130_20050613_190930_20050613_194259_B0FIELD.DAT (4.3 MB)
- Under IDL (ver 5.3 and higher) type pras,'example'
- This creates new binary data files
example/DMT_N1_1135_20050613_190930_20050613_194259_B0FIELD_aux.dat and
example/DMT_N1_1135_20050613_190930_20050613_194259_B0FIELD_sm.dat;
a new PRASSADCO configuration file
example/DMT_N1_1135_20050613_190930_20050613_194259_B0FIELD.ini ;
a new resulting postscript file
example/DMT_N1_1135_20050613_190930_20050613_194259_B0FIELD_pra00.ps (see below).
- The same procedure can be used for different level-1 files downloaded from the
DEMETER mission control center.
- Once the binary data files
DMT_N1_1135_XXXX_aux.dat and
DMT_N1_1135_XXXX_sm.dat are created from a given set of level-1 files
DMT_N1_1135_XXXX.DAT and DMT_N1_1130_XXXX.DAT, the
configuration file DMT_N1_1135_XXXX.ini can be modified (to select other
output wave characterictics or a different mode of output) using the
PRASSADCO documentation.
A new resulting postscript file DMT_N1_1135_XXXX_praKK.ps (where KK is 01, 02,...)
can be then created by the command prassadco,'DMT_N1_1135_XXXX.ini' run in the IDL environment.
Distribution:
- pras.pro ... The main IDL procedure (Parameter: path to the level-1 binary files, Uses: topra.idl)
- topra.idl ... IDL library of PRASSADCO and Topra procedures.
- pra_template.ini ... Template for the configuration file (ASCII) defining the output postscript file.
- guide.pdf ... PRASSADCO documentation (Cluster version) - a 2 MB pdf file.
Contains instructions on how to modify pra_template.ini
Additional links:
Example of the output for the above test data files
