Timesteps

The optional timesteps parameter is a listdictionary comprising a numericfloat vectorlist t with N monotonically increasing values and a numericfloat vectorlist dtmax with N-1 positive values. This tells longterm to pick time steps that are bounded above by dtmax for times between the corresponding pairs of elements of t. The values that can be set within the timesteps listdictionary are:

• t The N vectorlist of times, in yr, pairs of which bracket times during with the corresponding element of dtmax provides a bound on the time step. By default, t is c(0,10^((-1):7))[0] + [10**i for i in range(-1, 8)].
• dtmax The N-1 vectorlist of maximum time-step sizes, in yr. For times between t[n] and t[n+1], the time step chosen by longterm will be less than or equal to dtmax[n]. By default, dtmax is 10^((-2):6)[10**i for i in range(-2, 7)].