{
 "meta": {
  "dataset": "Subscriber history — @Civil_Engineering_Pdf_Notes_Book",
  "channel": "https://tgregister.com/channel/Civil_Engineering_Pdf_Notes_Book",
  "retrieved_at": "2026-09-07T06:06:09.330Z",
  "licence": "CC BY 4.0 — attribute to tgregister.com",
  "n_readings": 11,
  "window": {
   "from": "2026-08-07T19:11:21.458Z",
   "to": "2026-09-06T01:42:28.264Z"
  },
  "columns": {
   "ts": "when this reading was taken, UTC",
   "subscribers": "the count read (or, for source 3, carried over) — see source below",
   "source": {
    "0": "sweep.py — t.me/<name> profile page",
    "1": "promote.py — Bot API getChat",
    "2": "resolve.py — MTProto",
    "3": "spromote.py — t.me/s/<name> post preview (figure carried over from an earlier profile read, not the preview’s own rounded header)",
    "4": "remeasure.py — t.me/<name> profile page, re-read on a schedule"
   }
  },
  "note": "Snapshots are written only when a reading changes: a gap in ts means \"no change observed between readings\", never \"not measured\" and never \"interpolated\". Readings from different sources are separate lineages that do not confirm one another — subtracting across them can attribute a change to a period nothing was actually read in. Full method: https://tgregister.com/methodology#measuring"
 },
 "rows": [
  {
   "ts": "2026-08-07T19:11:21.458Z",
   "subscribers": 4940,
   "source": 0
  },
  {
   "ts": "2026-08-08T06:16:10.534Z",
   "subscribers": 4941,
   "source": 4
  },
  {
   "ts": "2026-08-10T20:37:21.561Z",
   "subscribers": 4943,
   "source": 4
  },
  {
   "ts": "2026-08-14T00:27:51.699Z",
   "subscribers": 4941,
   "source": 4
  },
  {
   "ts": "2026-08-19T21:42:32.714Z",
   "subscribers": 4954,
   "source": 4
  },
  {
   "ts": "2026-08-23T21:39:06.071Z",
   "subscribers": 4950,
   "source": 4
  },
  {
   "ts": "2026-08-27T02:34:33.013Z",
   "subscribers": 4956,
   "source": 4
  },
  {
   "ts": "2026-08-29T20:43:25.949Z",
   "subscribers": 4968,
   "source": 4
  },
  {
   "ts": "2026-09-01T16:14:25.441Z",
   "subscribers": 4971,
   "source": 4
  },
  {
   "ts": "2026-09-01T21:49:48.659Z",
   "subscribers": 4971,
   "source": 1
  },
  {
   "ts": "2026-09-06T01:42:28.264Z",
   "subscribers": 4986,
   "source": 4
  }
 ]
}