PVANodes ▸ Generators ▸ Tracer
Trace Domain
Traces magnetic field lines from launch points through a Tracer: forward along the field, backward against it, or both ways joined into one line per launch point. Lines can carry their length or polarity. r0 and r1 default to the radial extent of the field's main mesh and, with atol, are in the file's own solar radii (PSI_rsun).
Inputs
| Port | Accepts | Required | Description |
|---|---|---|---|
tracer | generator(tracer) | required | The Tracer that supplies the magnetic field |
Parameter ports
Added from the Parameters pane (⊕). While connected, each drives its parameter.
| Port | Accepts | Mode | Description |
|---|---|---|---|
lpsLaunch points | primitive(array) dataset(stack) dataset(grid) | opt-in | Launch points for the traced lines; replaces the n/r lattice while connected |
buffer_size | primitive(number) | opt-in drives buffer_size | Drives the Max Steps / Line parameter while connected |
r0 | primitive(number) | opt-in drives r0 | Drives the Inner Boundary parameter while connected |
r1 | primitive(number) | opt-in drives r1 | Drives the Outer Boundary parameter while connected |
atol | primitive(number) | opt-in drives atol | Drives the Boundary Tolerance (atol) parameter while connected |
Outputs
dataset(stack)
Parameters
The Parameters pane shows only the parameters relevant to the current settings.
| Parameter | Kind | Default | Choices / range | Unit | Notes |
|---|---|---|---|---|---|
Directiondirection | choice | both | forward | backward | both | ||
Launch Points (n)n | int | 100 | 1 to 100000 | ||
Launch Radiusr | float | 1.05 | 1 to | R_sun | |
Max Steps / Linebuffer_size | int | 2000 | 10 to | ⇄ port | |
Line Valuesvalues | choice | none | none | polarity | length | ||
Inner Boundaryr0 | float | none | 0 to | PSI_rsun | ⇄ port |
Outer Boundaryr1 | float | none | 0 to | PSI_rsun | ⇄ port |
Boundary Tolerance (atol)atol | float | 0.01 | 0 to | PSI_rsun | ⇄ port |
Used by
Click Cloud TraceClick to TraceCME Eruption at Selected PointExport and RetraceField Line Length OpacityFlow Along LinesFootpoint Displacement MapIntersecting IsosurfacesNull Point Spine TracingNull Point Tracing (With Fan and Spine)Picked Line Br TubeReconnection Between StepsSpline BuilderTrace (Array Launch Points)Trace (Default Launch Points)Trace (Geometry Launch Points)Trace (Launch Point File)Tracing Through Current SheetTwo Plotters (Trace)Velocity Along Lines Pick Line (group)Pick to Trace (group)Trace Backward (group)Trace Forward (group)Trace Forward & Backward (group)