Source: USGS Landsat Program
The USGS and NASA held a Landsat 9 Ground System Preliminary Design Review (GPDR) on March 20-22, 2018 in Sioux Falls, South Dakota.  The GPDR, which contains the Data Processing and Archive System (DPAS), Ground Network Element (GNE) and Landsat Multi-Satellite Operations Center (LMOC) components, demonstrated that the proposed design of each component satisfies the required functional and performance requirements to continue the Landsat 9 development process.
USGS and NASA personnel reviewed DPAS technical criteria, the preliminary relationship of the GNE design to the requirements, interface designs, integration and test methods, and LMOC programmatic material. Two programmatic requests-for-actions (RFA) were recorded, neither critical to the success of the outcome of the GPDR.
With the GPDR a success, the Ground System can now proceed to the Critical Design Review, which is planned for Fall 2018 – continuing to ensure the Landsat 9 mission remains on schedule for a launch readiness date of December 2020.