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Name

boom - Format to describe multiple aspects of an orbit

Description

This format grew out of the BOOM project. We want to describe an orbit in multiple ways: 1) a simple list of positions and velocities, optionally the potential and forces along the path. 2) an orbit density map, a time averaged density distribution in 2D or 3D, whatever appropriate. From these, via a Schwarzschild technique, the density could be re-constructed. 3) a surface of section, although this only makes sense in 2D.

We normally output the data in hdf5 format, but in orboom(1NEMO) there is an option to store in NEMO’s filestruct(5NEMO) format.

This format is really a hybrid of an orbit(5NEMO) and an image(5NEMO) .

Data

Briefly the HDF layout is as follows 
  BOOM, Np
  Particle[0]
    Nd
    ODM:Nx,Ny,map,xmin,xmax,ymin,ymax
    Orbit:Nt,t,x,y,u,v,
    SOSx:Ns,t,p,q
    SOSy:Ns,t,p,q
Here is the output of h5dump -n 
HDF5 "boom.hdf" {
FILE_CONTENTS {
 group      /
 dataset    /BOOM
 dataset    /Np
 group      /particle0
 dataset    /particle0/Nd
 group      /particle0/odm
 dataset    /particle0/odm/Nx
 dataset    /particle0/odm/Ny
 dataset    /particle0/odm/map
 dataset    /particle0/odm/xmax
 dataset    /particle0/odm/xmin
 dataset    /particle0/odm/ymax
 dataset    /particle0/odm/ymin
 group      /particle0/orbit
 dataset    /particle0/orbit/Nt
 dataset    /particle0/orbit/t
 dataset    /particle0/orbit/u
 dataset    /particle0/orbit/v
 dataset    /particle0/orbit/x
 dataset    /particle0/orbit/y
 group      /particle0/sosx
 dataset    /particle0/sosx/Ns
 dataset    /particle0/sosx/p
 dataset    /particle0/sosx/q
 dataset    /particle0/sosx/t
 group      /particle0/sosy
 dataset    /particle0/sosy/Ns
 dataset    /particle0/sosy/p
 dataset    /particle0/sosy/q
 dataset    /particle0/sosy/t
 group      /particle1
 dataset    /particle1/Nd
 group      /particle1/odm
 dataset    /particle1/odm/Nx
 dataset    /particle1/odm/Ny
 dataset    /particle1/odm/map
 dataset    /particle1/odm/xmax
 dataset    /particle1/odm/xmin
 dataset    /particle1/odm/ymax
 dataset    /particle1/odm/ymin
 group      /particle1/orbit
 dataset    /particle1/orbit/Nt
 dataset    /particle1/orbit/t
 dataset    /particle1/orbit/u
 dataset    /particle1/orbit/v
 dataset    /particle1/orbit/x
 dataset    /particle1/orbit/y
 group      /particle1/sosx
 dataset    /particle1/sosx/Ns
 dataset    /particle1/sosx/p
 dataset    /particle1/sosx/q
 dataset    /particle1/sosx/t
 group      /particle1/sosy
 dataset    /particle1/sosy/Ns
 dataset    /particle1/sosy/p
 dataset    /particle1/sosy/q
 dataset    /particle1/sosy/t
 dataset    /potname
 dataset    /potpars
 }
}

Files


src/orbit/misc - source code

See Also

orboom(1NEMO) , orbint(1NEMO) , snapgrid(1NEMO) , orbsos(1NEMO) , h5dump(1NEMO)

Author

Peter Teuben

Update History


26-Dec-19    V0.2 Created    PJT

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