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docs: state the 15 % fuel reserve and the mass-estimate iterations as the code runs them - #74
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input-prioritization.md and mrv-specification.md gave the fuel reserve of the initial mass estimate as about 3 % of trip fuel. The code uses 15 % (DEFAULT_FUEL_RESERVE_FRACTION = 0.15, following Teoh et al. 2024). Records the item in the units audit (Section 9 and the follow-up status table) and sets the I4 status row to #73. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The user docs said steps 2-4 of the mass estimate run twice. The code runs one constant-mass BADA pass, then up to three passes from the updated TOW, and stops when the TOW changes by 1 % or less of the previous TOW (max_mass_estimation_iter = 4, max_rel_mass_diff = 0.01). The last pass is kept; a BADA 3 or altitude-fallback retry starts the estimate again. Measured with the real code on the 4,303 computed NEATS_FINAL sample flights: 2,769 stop after two passes, 1,415 after three, 119 after four (3 of them at the cap with a change of 1.0-1.4 %). Recorded in the units audit, Section 9. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Docs only, no code change.
15 % (
DEFAULT_FUEL_RESERVE_FRACTION = 0.15, following Teoh et al. 2024).up to three passes from the updated TOW, and stops when the TOW changes by 1 % or less of the
previous TOW (
max_mass_estimation_iter = 4,max_rel_mass_diff = 0.01). The last pass iskept; a BADA 3 or altitude-fallback retry starts the estimate again.
two passes, 1,415 after three, 119 after four (3 of them at the cap with a change of 1.0–1.4 %).
Files: docs/explanation/input-prioritization.md, docs/explanation/mrv-specification.md,
docs/internal/pyneats_units_audit.md. Docs build checked.