Precise Point Positioning GPS Processing

Sometimes when doing GPS field work I will often require a way to double check my own GPS Processing work or am sometimes too far from an active control network to tie into. Using Precise Point Positioning (PPP) service in these situations has often come to my aid, especially on jobs in Nunavut or in Northern Ontario
The Canadian Geodetic Service provides a free online global GPS processing service called CSRS-PPP, where you can process files containing RINEX observations from either a single or dual frequency receiver in either static or kinematic modes. The service is free but does require that you sign up to obtain a username and password to gain access.