CHANGELOG

This file records dated repository-level documentation and implementation changes. Keep entries short, factual, and ordered newest last.

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Record meaningful repo changes here after they are made.
Keep implementation details brief and point to the affected files when useful.
Do not use this file for task planning; use TODO.md for the live work queue.
Do not use this file for durable assumptions or guardrails; use MEMORY.md for that context.

2026-03-28: Created README.md and MEMORY.md from the /docs PDFs and current MATLAB code. Confirmed the repo is still an incomplete assignment skeleton with unresolved placeholders and a missing getRho.m.
2026-03-28: Documented professor guidance that the atmosphere model must be integrated into the simulation, must include the stratosphere branch for altitude > 11 km, and will not run until the XX placeholders are replaced.
2026-03-28: Clarified file roles so MEMORY.md is the durable handoff and TODO.md is the active execution tracker.
2026-03-28: Confirmed the stratosphere equations from docs/Addendum to Atomosphere Model Feb 26.pdf and recorded the required z > 11000 m branch for the future getRho.m implementation.
2026-03-28: Implemented code/getRho.m, filled the known scalar assignment constants in code/Interceptor_3DOF.m and code/getGuidance.m, assumed Maz = 0 deg for the current coplanar setup, validated getRho.m in Octave, and confirmed that the next blocker is the unresolved target/missile data arrays in code/T3dxdt.m and code/M3dxdt.m.
2026-03-28: Transcribed the target and missile thrust, mass, area, and drag data into code/T3dxdt.m and code/M3dxdt.m, fixed row/column handling in code/getGuidance.m, verified the dynamics helpers in Octave, and found that the remaining issue is slow end-to-end runtime in the nested ode45 loop.