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  • Scripps Orbit and Permanent Array Center
    Welcome to the SOPAC, CSRC and ESESES MEaSUREs website The Scripps Orbit and Permanent Array Center (SOPAC) web site now includes the web pages of the California Spatial Reference Center (CSRC) and the MEaSUREs (Making Earth System Data Records for Use in Research Environments) ESESES ("Extended Solid Earth Science ESDR System") project, a collaborative NASA program with Caltech's Jet
  • CSRN Epoch 2025. 00 – Scripps Orbit and Permanent Array Center
    On July 31, 2025, the CSRC published a new geodetic datum for California called “ CSRN Epoch 2025 00 NAD83 (2011) ” under a Caltrans contract to SIO SOPAC The new NAD83 (2011) epoch-date coordinates are transmitted by CRTN with RTCM 3 3 data streams starting August 11, 2025
  • SOPAC – Scripps Orbit and Permanent Array Center
    Scripps Institution of Oceanography's Orbit and Permanent Array Center (SOPAC) has served a large community of users, starting in 1991, with a focus on the analysis and archiving of precise GPS data metadata and data products
  • CRTN Connecting – Scripps Orbit and Permanent Array Center
    CRTN is part of a larger organization, the California Spatial Reference Center (CSRC) To receive CSRC email updates and meeting information, please subscribe by emailing Maria (mrturingan@ucsd edu)
  • CSRC – Scripps Orbit and Permanent Array Center
    We are headquartered at the Institute of Geophysics and Planetary Physics (IGPP), at Scripps Institution of Oceanography (SIO)'s Orbit and Permanent Array Center (SOPAC) Our governing body is the Executive Committee drawn from local, state and federal government, the private sector and academia, and a Coordinating Council that meets twice a year
  • Daily RINEX data – Scripps Orbit and Permanent Array Center
    The main benefits of moving to this compression strategy for our RINEX Observation files are a significantly decreased storage requirement (Hatanaka-unix-compressed RINEX observation files can take as little as 25 to 30% of the space that a standard unix-compressed file would require), and a significantly decreased network load (as a result of the storage improvement) In addition, RINEX
  • MEaSUREs – Scripps Orbit and Permanent Array Center
    The ESESES website is hosted by the Scripps Orbit and Permanent Array Center (SOPAC) Project Algorithm Theoretical Basis Document (ATBD) (username: anonymous; password - your e-mail address)
  • Previous Datums – Scripps Orbit and Permanent Array Center
    All of these data and their metadata are archived at the Scripps Orbit and Permanent Array Center (SOPAC) The CSRN is rigorously aligned with the National Spatial Reference System (NSRS) using transformation parameters published by the National Geodetic Survey (NGS) The NSRS is tied to North America, while the ITRF is global
  • SCIP – Scripps Orbit and Permanent Array Center
    Suppose a surveyor, using real-time kinematic (RTK) methods, requires precise geodetic positions and is observing today (March 4, 2022) with respect to the California Real Time Network Suppose that the surveyor’s organization, say the San Diego Department of Public Works, publishes maps referenced to an earlier date, say 2011 0 The coordinates observed today can be related to this previous
  • Coordinating Council Meetings – Scripps Orbit and Permanent Array Center
    CSRC Coordinating Council Semi-Annual Meetings Main Topics of Discussion: CSRC California Real Time Network (CRTN) updates and topics and issues relevant to California PAST MEETINGS CSRC Coordinating Council Spring Meeting in Southern California Date: May 1, 2025, Thursday Time: 10:00 AM to 3:00 PM Location: Virtual and In-Person - IGPP Dept , Scripps Institution of Oceanography (SIO), UCSD





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