Higher Rate Real-Time GNSS Performance Metrics in the Network of the Americas

Session: Advances in Real-Time GNSS Data Analysis and Network Operations for Hazards Monitoring [Poster]
Type: Poster
Date: 4/30/2020
Time: 08:00 AM
Room: Ballroom
Description: 

The high-rate (1sps), real-time streaming subset of the Network of the Americas (NOTA) consists of ~950 continuously operating GNSS stations distributed across North America, the Caribbean and Northern South America. This subset of the NOTA represents a significant step in the evolution from networks originally designed to download 15 second GPS observations once per day in support of a 24-hour average position estimate. Each of these higher rate real-time station nodes is comprised of one of several combinations of receiver and antenna hardware generating once per second encapsulated BINEX format records streamed via nTRIP protocol to a central Network Operations Center at UNAVCO Inc. These data are re-distributed as BINEX and RTCM3 and used for precise point position (PPP) estimates. Multiple hazard and remote sensing communities, including Earthquake/Tsunami warning and Space Weather modeling, have increased their inclusion and dependence on these 1sps real-time and near real-time data products. On-going investigations categorize and characterize the performance of these nodes, comparing metrics including data product latencies, completeness, receiver signal to noise ratios, estimated signal multi-path and cycle slips. These station performance metrics are considered relative to the entire NOTA streaming network, relative to their individual lower rate metrics and relative to some of the available defined specifications of the end-users. We continue these investigations in both temporal, spatial and constellation dependencies, internally motivated by improved station health monitoring for optimal operations and externally targeting improved network health visibility and station integrity for end users.

Presenting Author: Tim Dittmann

Authors