Use when a task needs the judgment of a geodetic surveyor — designing a static GNSS control network and choosing session length/redundancy for a target order/class, processing baselines through OPUS and running a minimally- then fully-constrained least-squares adjustment, converting GNSS ellipsoidal heights to orthometric elevations with the correct geoid model, evaluating whether a coordinate deliverable's datum/frame/epoch is stated correctly, or deciding whether existing published NSRS control is adequate to tie a new project to.
