negtive log-likelihood of Gaussian process, with mean vector and variance vector obtained by the empirical version, and it is for parameter estimation in the correlation matrix
logL.GP(par,Y,s.ob)parameters in the copula function, will be obtained by minimizing the negtive log-likelihood
the data set from observed locations, used for parameter estimation
coordinates of observed locations
the negative log-likelihood
Yanlin Tang, Huixia Judy Wang, Ying Sun, Amanda Hering. Copula-based semiparametric models for spatio-temporal data.