This tool allows to input a new data point and compare it to the nominal AstroGeo22 solution and to the previously published geological data points. There are two entries in this form :
– The time of the observable ( in Ga) with its uncertainty (in Ga) : negative and positive uncertainty. By default, these are set to zero.
– The observable value with its uncertainty (negative and positive). There are several choices for this value :
– precession frequency ( in arcsec/yr)
– precession period ( in kyr)
– semi-major axis of the Moon (i.e. Earth-Moon distance), in Earth Radius (RE = 6378.1366 km)
– semi-major axis of the Moon (i.e. Earth-Moon distance), in 1000 km
– length of the solar day ( in hours)
– obliquity of the Earth ( in degrees)
Once the time and observable are set, clicking on the “Add points” button will both : convert the observable in all the other observable quantities using the nominal AstroGeo22 solution, and plot the new data point (in red) together with the nominal AstroGeo22 solution (with its interval uncertainty), and with all the available other published geological data points. The plot can be panned and zoomed. The final plot can be saved in various formats (pdf, png, svg), ready for inclusion in a presentation or publication.
One can also input a list of data points by clicking on ” Set of points”.
The entry is then with one points per line with 6 values separated by spaces for each values which are in sequence :
– Time, negative uncertainty on time, positive uncertainty on time, observable, neg. uncertainty, pos. uncertainty.
All data points will be converted through the AstroGeo22 nominal solutions in the other observables, and displayed in the plot.