astrochron (version 0.3.1)

etp: Generate Eccentricity-Tilt-Precession Models

Description

Calculate eccentricity-tilt-precession time series using solutions from Laskar et al. (2004, 2011)

Usage

etp(laskar,tmin=0,tmax=1000,dt=1,eWt=1,oWt=1,pWt=1,sol=5,esinw=F,standardize=T,genplot=T,
    verbose=T)

Arguments

laskar

Laskar et al. (2004, 2011) astronomical solutions.

tmin

Start time (ka before present, J2000) for ETP.

tmax

End time (ka before present, J2000) for ETP.

dt

Sample interval for ETP (ka). Minimum = 1 ka.

eWt

Relative weight applied to eccentricity solution.

oWt

Relative weight applied to obliquity solution.

pWt

Relative weight applied to precession solution.

sol

Eccentricity solution to use: 1= LA10a, 2= LA10b, 3= LA10c, 4= LA10d, 5= LA04.

esinw

Use esinw in ETP calculation? (T or F).

standardize

Standardize (subtract mean, divide by standard deviation) precession, obliquity and eccentricity series before applying weight and combining? (T or F)

genplot

Generate summary plots? (T or F).

verbose

Verbose output? (T or F).

Value

• Eccentricity + tilt + precession.

References

Laskar, J., Robutel, P., Joutel, F., Gastineau, M., Correia, A.C.M., Levrard, B., 2004, A long term numerical solution for the insolation quantities of the Earth: Astron. Astrophys., Volume 428, 261-285.

Laskar, J., Fienga, A., Gastineau, M., Manche, H., 2011, La2010: A new orbital solution for the long-term motion of the Earth: Astron. Astrophys., Volume 532, A89.