Pith Number

pith:TQ4LN6PJ

pith:1999:TQ4LN6PJJGXC74J3FR6FIQXAXN

not attested not anchored not stored refs pending

4D Tropospheric Tomography using GPS Estimated Slant Delays

A. Flores, A. Rius, G. Ruffini

arxiv:physics/9901004 v1 · 1999-01-07 · physics.geo-ph · physics.ao-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TQ4LN6PJJGXC74J3FR6FIQXAXN}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T01:38:04.199001Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9c38b6f9e949ae2ff13b2c7c5442e0bb47877c34436bba1933fecdf47ff0b8bb

Aliases

arxiv: physics/9901004 · arxiv_version: physics/9901004v1 · doi: 10.48550/arxiv.physics/9901004 · pith_short_12: TQ4LN6PJJGXC · pith_short_16: TQ4LN6PJJGXC74J3 · pith_short_8: TQ4LN6PJ

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/TQ4LN6PJJGXC74J3FR6FIQXAXN \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 9c38b6f9e949ae2ff13b2c7c5442e0bb47877c34436bba1933fecdf47ff0b8bb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a9cb8782af507a458f2ccb8bbbd3b593b9e3c1aa0395a039f73eea34e940edb4",
    "cross_cats_sorted": [
      "physics.ao-ph"
    ],
    "license": "",
    "primary_cat": "physics.geo-ph",
    "submitted_at": "1999-01-07T14:32:13Z",
    "title_canon_sha256": "59365dcbca9a92f0fd18f16f7a4bb20c542d2455d6585a0281a2d53bc2614152"
  },
  "schema_version": "1.0",
  "source": {
    "id": "physics/9901004",
    "kind": "arxiv",
    "version": 1
  }
}