nasa 4dNASA worked with 4D Vision Technology- later acquired by Tucson, Arizona-based 4D Technology Corporation- to develop interferometers that could test large space mirrors. 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: This