The almanac message returns a set of satellite orbit parameters. Almanac data is not very precise and is considered valid for up to several months. Please see the Navstar GPS Space Segment/Navigation user interfaces (ICD-GPS-200, Chapter 20.3.3.5.1.2 Almanac Data) for more details.
{
"copyright": [
"Copyright (C) 2019-2021 Swift Navigation Inc.",
"Contact: https://support.swiftnav.com",
"",
"This source is subject to the license found in the file 'LICENSE' which must",
"be distributed together with this source. All other rights reserved.",
"",
"THIS CODE AND INFORMATION IS PROVIDED 'AS IS' WITHOUT WARRANTY OF ANY KIND,",
"EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED",
"WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE."
],
"$schema": "http://json-schema.org/draft-06/schema#",
"$id": "#MsgAlmanacGPS",
"title":"MsgAlmanacGPS",
"description":"The almanac message returns a set of satellite orbit parameters. Almanac data is not very precise and is considered valid for up to several months. Please see the Navstar GPS Space Segment/Navigation user interfaces (ICD-GPS-200, Chapter 20.3.3.5.1.2 Almanac Data) for more details.\n",
"type": "object",
"properties": {
"common": {"$ref": "AlmanacCommonContent.json"},
"m0": {"type": "number"},
"ecc": {"type": "number"},
"sqrta": {"type": "number"},
"omega0": {"type": "number"},
"omegadot": {"type": "number"},
"w": {"type": "number"},
"inc": {"type": "number"},
"af0": {"type": "number"},
"af1": {"type": "number"}
},
"required": [
"common",
"m0",
"ecc",
"sqrta",
"omega0",
"omegadot",
"w",
"inc",
"af0",
"af1"
]
}