{
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    "time": "http://www.w3.org/2006/time#",
    "vann": "http://purl.org/vocab/vann/",
    "vcard": "http://www.w3.org/2006/vcard/ns#",
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      "gnss:igsModelCode": "JAVAD TRE_3 DELTA"
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      "gnss:antenna": {
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      "gnss:marker-arpEastEcc": {
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      "gnss:marker-arpNorthEcc": {
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}