------ DD OBJECTS COLLECTION ------
PRESSURE
KP Magnetic Field, CORALL, DOK2
Magnetic field pressure (PRESS and BPRESS objects) (B^2/8pi) is obtained from KP magnetic field data (2 min
averaged).
Plasma pressure 1 (PRESS and NKTPRESS objects) (Pplasma = nkTion + nkTelectron) is calculated from CORALL parameters.
Default electron pressure (can be changed in resource file) is half of the ion pressure.
Plasma pressure 2 (C_PRESS object) is calculated as energy density over CORALL (20 ev - 25
keV) spectra with 2 min averaging over azimuthal angle
and integration over 5 polar angles
(Pplasma =
4pi*sqrt(Mprot*2)*Sum(sqrt(E_i)*J(E_i)*sin(Alpha)*cos(Alpha)^2*deltaE_i*deltaAlpha)
Electrons aren't taken into account.
Warning: Such way of plasma pressure calculation is valid
only for isotropic plasma distribution.
Plasma pressure 3 (D_C_PRESS object) is calculated as energy density over combined CORALL and
DOK2 (20 ev - 700 keV) spectra. Data from one DOK2 detector and one CORALL detector are used.
Distribution function is considered to be isotropic.
CORALL and DOK2 spectra are averaged over azimuthal angle.
(Pplasma =
4pi/3*sqrt(Mprot*2)*Sum(sqrt(E_i)*J(E_i)*deltaE_i)
Electrons aren't taken into account.
Plasma ram pressure is calculated as mnV^2 from CORALL parameters.
NOTE:
Default Setting can be changed by using Resource files.
Available objects are:
-
PRESS - Magnetic and plasma pressure [nPa].
Object is called with one argument:
0 - magnetic pressure (blue), 1 - plasma pressure (red),
2 - total (magnetic+plasma) pressure.
Object is available only if both
KP magnetic field data and CORALL parameters data exist for defined period.
If not, one can use BPRESS and NKTPRESS objects.
Resource file "press.res" contents: Y-axis Type (0 - Linear (default),
1 - Logarithmic) and Ratio of Electron Pressure to Ion Pressure (default value is 0.5).
These two numbers should be written in one row and separated by space.
-
BPRESS - Magnetic pressure [nPa].
Resource file "bpress.res" contents: Y-axis Type (0 - Linear (default),1 - Logarithmic)
-
NKTPRESS - Plasma pressure [nPa] calculated from CORALL parameters.
Resource file "nktpress.res" is the same as for PRESS object.
-
C_PRESS - Plasma pressure [nPa] calculated as energy density over CORALL spectra.
Resource file "c_press.res": Y-axis Type (default 0) and CORALL BackGround value
(default 2).
-
D_C_PRESS - Plasma pressure [nPa] calculated as energy density over
combined CORALL-DOK2 spectra.
Object is available only if both
DOK2 data and CORALL data exist for defined period.
Resource file "d_c_press.res" is the same as for BPRESS object.
-
RAMPRESS - Plasma ram pressure [nPa].
Object is called
with three arguments:
0,0,0 - pressure onto the plane perpenducular
to V;
nx, ny, nz - onto arbitrary plane defined by normal
n=(nx,ny,nz) in GSM frame.
Resource file "rampress.res" is the same as for BPRESS object.
NOTE:
Yrange should be defined for all these objects.
Example 1
Objects are called here with default values (without using resource files).
Request file:
005
press .05 .05 1. .2 0. 0. 0. 1. 0
press .05 .05 1. .2 0. 0. 0. 1. 1
press .05 .2 1. .35 0. 0. 0. 1. 2
rampress .05 .35 1. .5 0. 0. 0. 1. 0,0,0
rampress .05 .5 1. .65 0. 0. 0. 1. 1,0,0
1996:295:20:00:00
000:01:00:00
Output:
