Minimum electromagnetic interference. Relatively clear horizon with any obstructions higher than 10 degrees located as far away from the reference antenna as possible and located to the north of the reference antenna. CORS provider will submit three consecutive continuous 24-hour data sets to NGS to test for site suitability and multipath conditions. On site contact during working hours. Antenna tower height less than 10 meters.
Provider owns land and facilities.
Adequate security for equipment. Receiver and communications hub located inside a building providing protection from weather and elements. Antenna located in a minimal multipath environment. Must be able to track at least 8 satellites above 10 degrees. Must have automatic switching between operating modes to retain full wavelength L2 when AS is on.