latest update:
checking service
[apexdb]
buy

particle_number_real_world_per_km · Other

Real-world solid particle number emissions per km (PN > 23 nm) from on-road PEMS testing. Stored as double precision because values commonly span 1e8 to 1e12 #/km.

type
numeric
applies to
all variants
filled
0%
sources
1

Meaning

Real-world solid particle number emissions per km (PN > 23 nm) from on-road PEMS testing. Stored as double precision because values commonly span 1e8 to 1e12 #/km.

Unit: km

Export shape

apex fieldjson
{
  "particle_number_real_world_per_km": 123,
  "_provenance": {
    "particle_number_real_world_per_km": {
      "source": "manual",
      "source_record_url": "https://apex-db.org/docs/sources#manual",
      "effective": true
    }
  }
}

Provenance

Apex stores source-qualified provenance for exported values. Buyer snapshots and API responses include the upstream source record where redistribution rights allow it, so a downstream model can cite the original regulator or manufacturer feed.

Field-level fill rates are measured across the current variant snapshot. Sparse fields are still documented because they can be important for regulatory, EV, safety, or emissions workflows.

Related docs