The redundant communication pathway and processing strategy for satellite navigation system such as GPS is extremely important for more reliable quasi real-time crustal deformation monitoring in case of huge interplate earthquake occurrence. We tested real-time kinematic GPS processing (RTK-GPS) via satellite-based mobile phone for redundant communication pathway for address the vulnerabilities of the infrastructure. We succeed to get the stable time series via satellite mobile phone network with almost zero-missing data for short and long baseline RTK-GPS. We also assessed stability, precision and accuracy of StarFire™ global satellites based augmentation system for redundant processing strategy. In order to assess coordinate precision and accuracy, we compared 1Hz StarFire time series and post-processed precise point positioning (PPP) 1Hz time series by GIPSY-OASIS II processing software Ver. 6.1.2 with three different product types (ultrarapid, rapid, and final orbits). We also used different interval clock information (30 and 300 seconds) for the post-processed PPP processing. The standard deviation of real time StarFire time series is less than 30 mm (horizontal components) and 60 mm (vertical component) based on 1 month continuous processing. We also assessed noise spectrum of the estimated time series by StarFire and post-processed GIPSY PPP results. We found that the noise spectrum of StarFire time series is similar pattern with GIPSY-OASIS II processing result based on JPL rapid orbit products with 300 seconds interval clock information. Based on these stability and noise assessment, we suggest that the various communication pathways for RTK-GPS processing and various processing strategy such as global satellites based augmentation system with traditional RTK-GPS processing strategy is important for more reliable quasi real-time crustal deformation monitoring.
|Number of pages||13|
|Journal||journal of the geodetic society of japan|
|Publication status||Published - 2013|
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)