{
  "annotation_id": "e02aebdc-bffa-4fb1-a596-b91d53a24384",
  "date_created": "2026-03-02T18:00:47.008000Z",
  "date_modified": "2026-03-02T18:00:47.008000Z",
  "file_hash": "8e2588f6230c87bd56ffe2d2c4a53ba587da4c21aaa8e08646732ec430b9ff5c",
  "private": false,
  "record": {
    "abstract": "The Washington Area Large-scale Time coincidence Array (WALTA) is placing\nparticle detector arrays in secondary schools in the Seattle area to build up a\nlarge-scale ultra-high energy cosmic ray detector network, one of several such\nprojects around the world. Scintillation counters salvaged from the CASA\nexperiment in cooperation with the CROP group at the University of Nebraska at\nLincoln are refurbished by teachers and students, tested, calibrated, and\ninstalled in four-fold arrays at high school sites. To identify time\ncoincidences, a GPS time synchronization system is employed. Data are acquired\nusing a custom lowcost data acquisition card. Here we will describe the\nlogistics of WALTA and show samples of data taken with a prototype array at the\nUniversity of Washington.",
    "arxiv_id": "physics/0311100",
    "authors": [
      "Richard Gran",
      "R. Jeffrey Wilkes",
      "Hans-Gerd Berns",
      "T. H. Burnett"
    ],
    "categories": [
      "physics.ins-det",
      "physics.ed-ph"
    ],
    "title": "WALTA school-network cosmic ray detectors",
    "url": "https://arxiv.org/abs/physics/0311100"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "0f9a6b49-0a95-4f3f-800a-c32935438a8f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}