### `designs.csv` — Field Definitions

- **design_id** – Unique identifier for each synthetic aircraft design.
- **animals** – Comma-separated list of bio-inspired animals influencing this design.
- **traits** – Comma-separated list of functional traits derived from the animals (e.g., burst power, glide efficiency).
- **animal_count** – Number of distinct animals contributing traits to this design.
- **trait_count** – Number of distinct traits applied to this design.

- **empty_mass_kg** – Airframe + systems mass without payload (kilograms).
- **payload_mass_kg** – Assigned payload mass for the DARPA mission scenario (kilograms).
- **rotor_count** – Total number of rotors / lift fans in the design.
- **max_twr** – Maximum thrust-to-weight ratio achievable by the propulsion system.
- **burst_power_factor** – Multiplier indicating short-duration burst power relative to nominal power (1.0 = none).
- **burst_duration_s** – Approximate duration for which burst power can be sustained (seconds).
- **unsteady_lift_gain** – Dimensionless factor representing additional lift from unsteady / vortex aerodynamics (bee-like hover).

- **energy_system_type** – Categorical label for the primary energy system (e.g., `li_ion`, `li_s`, `solid_state`, `fuel_cell_li_ion_hybrid`).
- **energy_system_description** – Text description of the energy system and maturity.
- **energy_density_class** – Qualitative class for energy density (e.g., `medium_high`, `very_high`, `extreme`).
- **power_class** – Qualitative class for available power output (e.g., `high`, `medium`).
- **tech_maturity_class** – Qualitative indicator of technology readiness (e.g., `high`, `medium_low`).
- **energy_system_extra_failure_risk** – Additional failure-risk contribution from the chosen energy system (dimensionless probability term).

- **battery_mass_kg** – Mass of the main battery pack (kilograms).
- **battery_spec_energy_Wh_per_kg** – Sampled specific energy of the battery chemistry (watt-hours per kilogram).
- **battery_energy_Wh** – Total usable battery energy (watt-hours).
- **supercap_mass_kg** – Mass of high-power supercapacitors (kilograms).
- **supercap_energy_Wh** – Usable energy stored in supercapacitors (watt-hours).

- **structural_material** – Primary structural material choice (e.g., `carbon_composite`, `aluminum_lithium`, `titanium_alloy`).
- **structural_material_class** – Qualitative category for weight vs stiffness (e.g., `light_stiff`, `heavy_robust`).
- **structural_extra_failure_risk** – Added structural failure-risk term from the material choice.
- **rotor_blade_material** – Material used for rotor blades (e.g., carbon composite, glass composite, aluminum).
- **landing_gear_material** – Material used for landing gear (e.g., titanium, steel, composite).

- **frame_stiffness_longitudinal** – Relative stiffness index of the longitudinal frame (higher = stiffer, lower = more compliant).
- **tendon_cable_fraction** – Fraction of structural load carried by tendon / cable analogs (0–1).
- **gust_rejection_gain** – Control-system gain describing how aggressively the aircraft rejects wind gust disturbances.
- **landing_gear_mass_kg** – Mass allocated to landing gear (kilograms).
- **max_touchdown_velocity_mps** – Maximum tolerated vertical touchdown speed before structural risk increases (meters per second).

- **cruise_speed_mps** – Nominal cruise speed used in mission planning (meters per second).
- **climb_rate_mps** – Nominal vertical climb rate to reach cruise altitude (meters per second).
- **mode_count** – Number of distinct control / flight “modes” or gaits available (e.g., hover, heavy-load cruise, light-load return).

- **mtow_kg** – Maximum takeoff weight: empty mass + payload mass (kilograms).
- **payload_to_aircraft_ratio** – Ratio of payload mass to empty aircraft mass.

- **rule_empty_mass_ok** – Boolean flag indicating whether empty mass satisfies the DARPA maximum empty-mass constraint.
- **rule_payload_ok** – Boolean flag indicating whether payload meets or exceeds the DARPA minimum payload constraint.
- **design_qualifying** – `True` if both mass and payload rules are satisfied; otherwise `False`.
- **design_qualifying_score** – Qualifying score used in the dataset, equal to `payload_to_aircraft_ratio` for qualifying designs and `0.0` otherwise.

- **design_summary** – Human-readable paragraph summarizing the design, its inspirations, and performance profile.

- **propulsion_architecture** – High-level propulsion architecture label (e.g., `pure_rotor_electric`, `rotor_plus_pusher`, `rotor_plus_small_jet`, `ducted_fans_hybrid`).
- **primary_propulsor_type** – Primary thrust mechanism type (e.g., `multirotor`, `ducted_fan_array`).
- **secondary_propulsor_type** – Secondary propulsion type if present (e.g., `pusher_propeller`, `small_jet`, or `none`).
- **secondary_propulsor_fraction** – Fraction of thrust / power budget attributed to the secondary propulsor (0–1).

- **propulsion_hover_power_factor** – Multiplier applied to hover power due to propulsion architecture.
- **propulsion_cruise_power_factor** – Multiplier applied to cruise power due to propulsion architecture.
- **propulsion_arch_extra_failure_risk** – Added failure-risk term specific to the propulsion architecture choice.

- **image_prompt** – Text prompt describing the design for use with image generation models (optional; not required for analysis).

### `missions.csv` — Field Definitions

One row per simulated mission scenario.

- **design_id** – ID linking to the aircraft configuration used in this mission.
- **mission_id** – Unique identifier for this mission instance.
- **wind_speed_kts** – Ambient wind speed sampled for the mission (knots).
- **turbulence_index** – Dimensionless turbulence severity factor (0.0–1.0), with higher values representing more aggressive gusts.

- **success** – Boolean indicator: `True` if the aircraft completed the mission within constraints; otherwise `False`.

- **failure_phase** – Name of the flight phase where the mission failed (e.g., `climb`, `cruise`, `landing`), or `none` for successful missions.
- **failure_reason** – Text description of the reason for mission termination  
  (e.g., `"energy_depleted"`, `"time_exceeded"`, `"random_failure"`, `"payload_loss"`).
- **rule_violation** – DARPA rule that was violated if termination occurred (empty if none).

- **total_time_s** – Actual mission duration from takeoff to termination (seconds).
- **time_takeoff_climb_s** – Time spent climbing to cruise altitude (seconds).
- **time_loaded_cruise_s** – Time in cruise while carrying payload (seconds).
- **time_empty_cruise_s** – Return/cruise time after payload release (seconds), when applicable.
- **time_descent_landing_s** – Time spent in controlled descent and landing approach (seconds).

- **energy_used_Wh** – Total energy consumed over the mission (watt-hours).
- **battery_energy_remaining_Wh** – Remaining battery energy at mission termination (watt-hours).

- **payload_to_aircraft_ratio** – Design-level payload efficiency (repeated from design file for convenience).
- **is_qualifying_run** – `True` if all mission rules were satisfied.
- **qualifying_score** – Mission-level score for qualifying runs; `0.0` if not qualifying
  (calculated as payload-to-aircraft efficiency adjusted for mission success).

### `missions_timeseries.csv` — Field Definitions

Time-indexed telemetry data sampled throughout each mission.

One row represents one timestep for a given design and mission.

- **design_id** – Aircraft configuration identifier.
- **mission_id** – Mission instance identifier (links to `missions.csv`).

- **t_s** – Elapsed simulation time since takeoff (seconds).

- **phase** – Current flight phase label at this timestep:
  - `takeoff_climb`
  - `loaded_cruise`
  - `empty_cruise`
  - `descent_landing`
  - `terminated` (if triggered by rule or random failure)

- **altitude_m** – Instantaneous altitude above ground (meters).
- **distance_m** – Total horizontal distance traveled since takeoff (meters).
- **speed_mps** – Airspeed (meters per second).

- **mass_kg** – Current total mass of the aircraft (kg), including payload when attached.

- **power_W** – Instantaneous electrical/mechanical power draw (watts).
- **energy_used_Wh_cum** – Cumulative energy consumed up to this timestep (watt-hours).
- **battery_remaining_Wh** – Estimated remaining usable battery energy (watt-hours).

- **payload_attached** – Indicates whether payload is still attached (1 = yes, 0 = deployed/removed).

- **wind_speed_kts** – Sampled wind speed affecting that timestep (knots).
- **turbulence_index** – Stochastic disturbance intensity (0.0–1.0), influencing control and gust corrections.