The main problems in GPS technology including the system bias to SLR, its own annual variety and the change of GPS satellite antenna phase center are also discussed.
Functional bias towards this kind of system, CRM, OA from the database, code, front-end, need to customize the UI, so development sites requires a collaborative development, technology strong team.
I predict, he in the early 80s but will think from 1950 to 1970 crazy implementation of qualitative research and information will technology is a kind ofbias, if he arrives had still been alive.