PPP generates two forms of output; summary reports (short and detailed) and graphical time series plots. All output can be downloaded using the link provided in the PPP service returned e-mail. The short summary includes session results and critical statistics giving the "vital signs" of the solution. It is useful to quickly validate the PPP results. The detailed summary is in two text files, the .sum file containing average session results and the .pos file with epoch-by-epoch parameter estimates. The graphical outputs included as part of the short summary (postscript file) depict time series of estimated parameters with corresponding standard deviations, observations residuals and phase ambiguities. The following sections provide a description of the PPP output.