JTRF – JPL Terrestrial Reference Frame
The JPL Terrestrial Reference Frame (JTRF) is a Terrestrial Reference Frame Combination Center (TRF CC) within NASA’s JPL Space Geodesy Task (JSGT). It integrates data and analysis from all major geodetic techniques—GNSS, VLBI, SLR, and DORIS—to produce a high-quality combined terrestrial reference frame. JTRF supports NASA missions and science by providing precise reference coordinates and velocities, as well as additional geodetic products. It also contributes to the International Earth Rotation and Reference Systems Service (IERS) by providing candidate solutions for the International Terrestrial Reference Frame (ITRF) and assessing the quality of solutions from other institutions.
