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{
    "localId": "7077465",
    "label": "Rocket Testing",
    "core": "doc",
    "dtoType": "document",
    "citationUrl": "https://catalog.archives.gov/id/7077465"
}

{
    "id": "7077465",
    "sourceUrl": "https://catalog.archives.gov/id/7077465",
    "contentType": "document",
    "title": "Rocket Testing",
    "description": "This item is a publication about the Naval Ordnance Test Station at Inyokern, California, with illustrations by Russell W. Porter.",
    "citationUrl": "https://catalog.archives.gov/id/7077465",
    "collections": [
        "Russell W. Porter Papers",
        "Publications"
    ],
    "iiifBase": "https://s3.amazonaws.com/NARAprodstorage/opastorage/live/65/774/7077465/content/arcmedia/dc-metro/XRWP/gallery/hd1-111196097-2012-002-pr.jpg",
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    "imageCount": 44,
    "hasImages": true,
    "source": "import",
    "hasTranscription": false
}

{
    "url": "https://catalog.archives.gov/id/7077465",
    "naId": 7077465,
    "levelOfDescription": "item",
    "productionDates": [
        {
            "day": 15,
            "logicalDate": "1945-06-15",
            "month": 6,
            "year": 1945
        }
    ],
    "recordType": "description",
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{
    "seq": 36,
    "pageIndex": 0,
    "type": "photo",
    "url": "https://s3.amazonaws.com/NARAprodstorage/opastorage/live/65/774/7077465/content/arcmedia/dc-metro/XRWP/gallery/hd1-111196097-2012-016-pr.jpg",
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    "ocrText": "GROUND RANGES\nON GROUND ranges, rockets are fired to obtain information about velocities, accel-\neration during the burning of the propellant, ranges, dispersions, effect of temper-\nature, and many other factors. At the Naval Ordnance Test Station, range firing\ntests are conducted on ground ranges G-1 and G-2. These two ranges are adjacent\nto each other and are equipped with duplicate facilities. At G-2 only rockets with\ninert heads are fired, whereas at G-1 all rockets fired have high-explosive heads.\nThis arrangement permits the safe recovery of rounds of both types for further\nstudy, and also the recovery of high-explosive duds which might be mistaken for\ninert rounds if they were fired at G-2.\nBefore firing, the rounds are kept for a number of hours in temperature-\nconditioning units which can be set to maintain a constant temperature anywhere\nbetween -50°F and 150F. After launching, high-speed motion picture photog-\nraphy is used to study the flight of the rockets. From these pictures, instantaneous\nvelocities and accelerations may be computed. At impact, spotters located behind\nthe launcher and in towers alongside the impact area determine accurately the\nlocation of each hit. From their reports, data concerning ranges and dispersions\nare obtained.\n14"
}