Lunar Ice Prospecting 2D: Neutron Spectrometer Mapping

This is the top-down 2D companion to the 3D lunar-ice prospector: the same epithermal-neutron survey physics, rendered as a pannable, zoomable orbital map instead of a tilted terrain scene. A virtual spectrometer flies a boustrophedon ground track over a procedurally generated south-pole crater field — exactly the remote-sensing method missions like Lunar Prospector and LRO's LEND instrument use to find polar water ice without ever touching the ground. Hydrogen bound in ice moderates escaping neutrons, suppressing the local count rate; the simulator turns that suppression back into a live, noisy estimate of ice concentration for every surveyed cell, sharpening as a cell is revisited, while a real-time strip chart plots the raw measured counts against the noise-free baseline so you can see the Poisson wobble directly. Orbital altitude, integration time and scan speed all trade coverage speed against measurement noise and spatial resolution, and a ground-truth toggle lets you check the surveyed estimate against the real hidden ice field underneath.