Usage in Calculator: p0y = cluprobe(q0,q1) q0 is Cluster X ephemeris phase_2 X = 1,2,3 or 4 q1 is Cluster X ephemeris position X is the same as above.In this mode a new window (the cluprobe window) appears with a drawing of the satellite and the probes.
The coordinate system in this window is the Inverted Despun Satellite (IDS) coordinate system.
The z-axis is the negative spin axis. The xy-plane is the satellite spin plane. The direction to the SUN is in the xz-plane.
It is almost parallel to the GSE Coordinate system. (Def of GSE in CSDS User manual Sec 3.13).
The Options in the cluprobe window menubar is used to set the parameters of the cluprobe window.
The Options->Color selection is used to set the color of the window background, EFW probes and FGM booms.
When Options->InScale->on is set the Cluster satellite,
the length of the FEW probe wires and FGM booms
are drawn in correct scale.
In this case the user must have a very high screen resolution to see the EFW probes.
When Options->Axis->off is set the axis are not plotted.
When Options->Mag->off is set the FGM booms are not plotted.
Usage in Calculator: p0y = cluprobe(q0,q1,'e1 e2 e3 e4 m1 m2 m9 dw') q0 is "Cluster X ephemeris phase_2" X = 1,2,3 or 4 q1 is Cluster X ephemeris position X is the same as above. and the options in the third argument are selected from: e1 show when efw probe 1 is towards sun, length 1.0 (phase 5/8) e2 show when efw probe 2 is towards sun, length 2.0 (phase 1/8) e3 show when efw probe 3 is towards sun, length 3.0 (phase 7/8) e4 show when efw probe 4 is towards sun, length 4.0 (phase 3/8) m1 show when mag (FGM) boom 1 is towards sun, length -1.0 (phase 0/8) m2 show when mag boom 2 is towards sun, length -2.0 (phase 4/8) m9 show when mag booms are perpendicular towards sun, length -3.0 (phase 6/8) wd d=1,2,...,9 width of marker pulse, default is 4The first and second arguments in the cluprobe operator have to be the "Cluster X ephemeris phase_2", X = 1, 2, 3 or 4 .
EXAMPLE: p0y = cluprobe(q0,q1,'e3 e4') This shows when probe 3 points twoards the sun, length 3. This shows when probe 4 points twoards the sun, length 4.
This figure shows the result when the p0y = cluprobe(q0,q1,'e3 e4') is used in the igr Calculator. q0 is "Cluster 1 ephemeris phase_2" and q1 is "Cluster 1 ephemeris position". The blue lines with length 3 shows when EFW probe 3 points towards the sun. The blue lines with length 4 shows when EFW probe 4 points towards the sun. LIMITATION: The free() and XtFree() functions sometimes crashes on several data segments. Therefore this operator is set to work on only the first segment. The number of samples in the other segments are set to zero. (This might be solved in the future. Then this operator can be set to work on all segments.)