Pith Number

pith:S3HMTRGE

pith:2026:S3HMTRGEBKVFVJKAGTZB47IOSK

not attested not anchored not stored refs pending

A First Africa Wide Amateur Radio Contact Experiment with the International Space Station

Amare Abebe Gidelew, Carla Sharpe Mitchell, Claudio Ariotti, Declan Kirrane, Domingos Barbosa, Miguel Avillez, Miracle Chibuzor Marcel, Peter Kofler, Stefan Dombrowski, Vidvuds Beldavs

arxiv:2607.16545 v1 · 2026-07-17 · physics.ed-ph · astro-ph.IM · physics.soc-ph · physics.space-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{S3HMTRGEBKVFVJKAGTZB47IOSK}

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	2026-07-21T00:20:24.620549Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

96cec9c4c40aaa5aa54034f21e7d0e92a2a8b66f66ed0dc4d02beba6509e5c91

Aliases

arxiv: 2607.16545 · arxiv_version: 2607.16545v1 · doi: 10.48550/arxiv.2607.16545 · pith_short_12: S3HMTRGEBKVF · pith_short_16: S3HMTRGEBKVFVJKA · pith_short_8: S3HMTRGE

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/S3HMTRGEBKVFVJKAGTZB47IOSK \
  | 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: 96cec9c4c40aaa5aa54034f21e7d0e92a2a8b66f66ed0dc4d02beba6509e5c91

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3dece8fbcb82ce450c2d9f21c05e6a6139c9ac19ec5e7c5ce2913c5729cfe682",
    "cross_cats_sorted": [
      "astro-ph.IM",
      "physics.soc-ph",
      "physics.space-ph"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2026-07-17T22:42:30Z",
    "title_canon_sha256": "8fe23e9b4fe0667a6fdf4f386a942c3e43c743d99b214727d7cf439f637ab712"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.16545",
    "kind": "arxiv",
    "version": 1
  }
}