Oh cool It stores: a) position in 3 Vectors (x,y,z) b) velocity (a,b,c) c) ID So that’s it. 7 parts to this. But that’s all you need. Position is stored in the unit of Mpc/h as double precision 3 vectors. Velocity is stored in peculiar velocity km/s as single precision 3 vectors. ID is stored as 8 bit unsigned integers

Oh cool It stores:
 
a) position in 3 Vectors (x,y,z)
b) velocity (a,b,c)
c) ID
 
So that’s it. 7 parts to this. But that’s all you need.
 
Position is stored in the unit of Mpc/h as double precision 3 vectors. Velocity is stored in peculiar velocity km/s as single precision 3 vectors. ID is stored as 8 bit unsigned integers
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