'Centimeter level' presentation slideshows

GPS Signals

GPS Signals. There are 31 operational GPS satellites right now. Most commercial receivers only track L1 frequency, so called single-frequency receivers. Dual-frequency receivers can track both L1 and L2 frequencies. RTK receivers are mostly dual frequency receivers.

924 views • 29 slides

506 views • 28 slides

NGS PSC Approved Concepts for Establishing Local Survey Control Networks for Sentinel Site

NGS PSC Approved Concepts for Establishing Local Survey Control Networks for Sentinel Site . Initial Wetland Surface. Subsided Wetland Surface. Bench Mark with Geodetic Control (NAVD88, etc.). Surface Elevation Table (SET). Tide Gauge. Surface Accretion. Elevation Change. Upland.

178 views • 5 slides