{
  "axes": {
    "core": {
      "a_imag": "paths",
      "a_real": "paths",
      "interaction_count": "paths",
      "interaction_flags": "paths",
      "link_path_offsets": "links+1",
      "link_ue_index": "links",
      "path_rank": "paths",
      "phi_r": "paths",
      "phi_t": "paths",
      "tau": "paths",
      "theta_r": "paths",
      "theta_t": "paths"
    },
    "detail": {
      "interaction_rank": "interactions",
      "interaction_type": "interactions",
      "interaction_vertex": "interactions,3",
      "path_interaction_offsets": "paths+1"
    },
    "positions": {
      "bs_positions": "bs,3",
      "ue_positions": "ues,3"
    }
  },
  "capabilities": {
    "retained_empty_links": true
  },
  "fields": {
    "core": {
      "a_imag": "<f4",
      "a_real": "<f4",
      "interaction_count": "|u1",
      "interaction_flags": "<u2",
      "link_path_offsets": "<i8",
      "link_ue_index": "<i4",
      "path_rank": "|u1",
      "phi_r": "<f4",
      "phi_t": "<f4",
      "tau": "<f4",
      "theta_r": "<f4",
      "theta_t": "<f4"
    },
    "detail": {
      "interaction_rank": "|u1",
      "interaction_type": "|i1",
      "interaction_vertex": "<f4",
      "path_interaction_offsets": "<i8"
    },
    "positions": {
      "bs_positions": "<f4",
      "ue_positions": "<f4"
    }
  },
  "layout": {
    "alignment": {
      "counts": "interaction_count[j] = path_interaction_offsets[j+1] - path_interaction_offsets[j]",
      "interactions": "interaction_rank, interaction_type, interaction_vertex share interaction index k",
      "links": "link_ue_index and link_path_offsets[:-1] share link index i",
      "paths": "core arrays on axis paths share path index j; detail path j is core path j of the record with the same scene_id, frequency_hz and bs_index (equal path_axis_sha256)"
    },
    "index_base": 0,
    "link_path_offsets": "paths of link i",
    "offsets": "X_offsets[i]:X_offsets[i+1] (half-open) is the span of element i; X_offsets[0] = 0, X_offsets[-1] = length of the spanned axis, non-decreasing",
    "path_interaction_offsets": "interactions of path j",
    "references": {
      "bs_index": "row of bs_positions in the scene positions record",
      "interaction_type": "code in schema/interaction-codes.json",
      "link_ue_index": "row of ue_positions in the scene positions record"
    },
    "vectors": "last axis is (x, y, z) in the scene frame"
  },
  "metadata_key": "__meta__",
  "metadata_schema": "wireless.npz-meta",
  "metadata_version": 2,
  "path_axis_sha256": "path-axis-v1 (wireless_env_data.codecs.path_axis)",
  "schema": "wireless.arrays",
  "units": {
    "a_imag": "1",
    "a_real": "1",
    "bs_positions": "m",
    "interaction_vertex": "m",
    "phi_r": "rad",
    "phi_t": "rad",
    "tau": "s",
    "theta_r": "rad",
    "theta_t": "rad",
    "ue_positions": "m"
  }
}