Pollinator Drone Charge (fleet)

Definition

Pollinator Drone Charge (fleet) is the population-mean state of charge (SoC), expressed as a percentage, across all in-service units of the Pollinator Drone Swarm. Each drone reports its individual SoC over the PhytoSense Mesh; the fleet metric is the mean over units that are flight-eligible (charged, docked-and-ready, or on task), excluding units in maintenance or fault lockout. It is a readiness figure: it answers whether the swarm can sustain the day's pollination schedule without coverage gaps.

Why it matters

Sector-7 relies on autonomous pollination to set fruit and propagate the collection; a swarm that runs flat mid-cycle leaves bloom-area uncovered (VC-MET-305) and depresses yield downstream. Because charge depletes faster under high task density and adverse cell conditions, a falling fleet mean is the leading indicator of an impending coverage shortfall. CHLORA stages recharge rotations against this metric and surfaces it on the Operations Dashboard so dispatch can pre-position reserve units before coverage degrades.

Formula

The metric is the mean SoC over flight-eligible drones, with a reserve-fraction guard:

SoC_fleet = ( 1 / M ) · Σ SoC_j     over flight-eligible drones j
            expressed as percent, 0–100

where:
  M       = count of flight-eligible drones
  SoC_j   = per-drone state of charge from BMS telemetry
  eligible = state ∈ {DOCKED_READY, ON_TASK, CHARGED}
             (excludes MAINTENANCE, FAULT, RESERVED_COLD)

Coverage-risk guard (published alongside):
  n_below_50 = | { j : SoC_j < 50% } |
  if n_below_50 / M > 0.15  →  flag DEPLETION_RISK and stage
     recharge rotation ahead of schedule.

Per-drone SoC is Coulomb-counted, drift-corrected against open-
circuit voltage at each dock event; accuracy ± 2% of full scale.

Inputs

Units & Scale

The metric is a percentage on a 0–100 scale, reported to whole-percent precision. It is a fleet mean, not additive; sub-swarm means (by cell or by drone generation) are published for diagnosis. The eligible-population denominator excludes units in maintenance or fault, so the figure reflects deployable charge rather than nameplate fleet charge. A DEGRADED confidence flag is raised if more than 5% of drones miss two consecutive telemetry frames.

Sampling & Source

• Recomputed every 5 minutes from per-drone telemetry over the PhytoSense Mesh.
• Per-drone SoC is Coulomb-counted and drift-corrected against open-circuit voltage at each dock event.
• Only flight-eligible drones enter the mean; maintenance and fault-locked units are excluded.
• Stale handling: > 5% of drones missing two frames → DEGRADED; depletion-risk fraction > 15% below 50% SoC → early recharge rotation staged.

Thresholds

Recent Trend

Fleet-mean state of charge in percent, last 14 telemetry frames:

Interpretation Guidance

Related Metrics

Related SOPs

• SOP Library — pollinator-swarm operations and recharge-rotation procedures.
• Coverage-risk recharge staging & task shedding on WARN/CRIT — see the SOP Library.
• Drone fault handling & telemetry monitoring — Monitoring Systems.