4D -

nasa 4dThe compelling thing about Charlie Pellerin’s 4-D System is that it works. As a senior NASA leader, I witnessed a literal transformation as the 4-D system took root in our culture. InThis 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: This