Ground Track & Nodal Precession (2D)

This is the flat-map, mission-control way of watching the same J2 nodal-precession physics as the 3D globe version: an equirectangular ground track traces the satellite's sub-satellite point orbit after orbit, drifting westward each pass as Earth rotates underneath the orbital plane, while the whole pattern itself creeps slowly sideways as the nodal precession rotates the orbit's ascending node. A linked inclination-vs-precession-rate curve and a RAAN compass dial make the sun-synchronous solve visible as a literal curve crossing rather than a single readout, and the map supports drag-to-pan and scroll-to-zoom.