Pith Number

pith:L2VHAXQ7

pith:2020:L2VHAXQ76TBKLFUAQ355OWEMMA

not attested not anchored not stored refs pending

The NTSC VLBI System and its application in UT1 measurement

Bo Zhang, Dang Yao, Jia Liu, Jian-Jun Gong, Jing Sun, Lang-Ming Ma, Shuang-Jing Xu, Xu-Hai Yang, Yan Sun, Ying Yang, Yuan-Wei Wu

arxiv:2002.07404 v2 · 2020-02-18 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{L2VHAXQ76TBKLFUAQ355OWEMMA}

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	2026-07-05T05:43:06.459354Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5eaa705e1ff4c2a5968086fbd7588c603b5d27b6c04e3fdfefa5d9a05cfab0d5

Aliases

arxiv: 2002.07404 · arxiv_version: 2002.07404v2 · doi: 10.48550/arxiv.2002.07404 · pith_short_12: L2VHAXQ76TBK · pith_short_16: L2VHAXQ76TBKLFUA · pith_short_8: L2VHAXQ7

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/L2VHAXQ76TBKLFUAQ355OWEMMA \
  | 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: 5eaa705e1ff4c2a5968086fbd7588c603b5d27b6c04e3fdfefa5d9a05cfab0d5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d07e5c016752fab6325418c53ea003c3640321c6b78536cf461f15bf13bf26a4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2020-02-18T06:55:24Z",
    "title_canon_sha256": "aec7ba8252effc46728ac3cd16e7742b5e9cdfcbc4987c93b2e8993bace1f030"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2002.07404",
    "kind": "arxiv",
    "version": 2
  }
}