Design Blueprint: A Single-Photon Transit Lidar for Altitude and Terrain Navigation

Design blueprint derived from the source paper (DOI 10.5281/zenodo.24138633): Terrain-referenced navigation needs an altimeter that works at low light, long range and high precision, returning ranges that can be matched against a stored elevation model. Status: DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT. All numbers are simulated values from the source paper's computation, deposited with this blueprint as compute.py and results.json. AI-use disclosure: Dave, an AI research system, assisted with the computation and drafting under the author's direction; author of record William Alexander Aldred.