nasa 4dThis value should be one of SM, GSM, GSE, GM, GEO, GEI_J2000, GEI_TOD. This parameter is optional and defaults to the 4D Orbit Viewer's default value. resolution: small integer: ThisWith renewed emphasis on 4D trajectories and time management in the JPDO NextGen concepts, it is useful to review the history and current status of 4D flht management. In