Parser for getting Earth magnetic fields values from www.swpc.noaa.gov
Parser for getting Earth magnetic field parameters from Space Weather Prediction Center - http://www.swpc.noaa.gov/.
This is simple pure nodejs data scrapper, that grabs data primary and secondary Goes Magnetometers and parses them as array.
var geomagnetic = require'geomagnetic';geomagneticgetPrimaryiferr throw err;console.logdata;;geomagneticgetSecondaryiferr throw err;console.logdata;;
will return something like:
timestamp: 1399158180000time: Sun May 04 2014 03:03:00 GMT+0400 MSKHp: 63.7He: 75.2Hn: -7.73total: 98.8units: 'nanotesla (nT)'timestamp: 1399158240000time: Sun May 04 2014 03:04:00 GMT+0400 MSKHp: 64.4He: 76.2Hn: -9.04total: 100units: 'nanotesla (nT)'timestamp: 1399158300000time: Sun May 04 2014 03:05:00 GMT+0400 MSKHp: 64.5He: 77.1Hn: -9.51total: 101units: 'nanotesla (nT)'
The data is an array of objects with 4 fields:
timestamp - unix timestamp of moment when current measures are taken
Hp - component perpendicular to the satellite orbital plane or parallel to the Earth's spin axis
He - component perpendicular to Hp and directed earthwards
Hn - component perpendicular to both Hp and He, directed eastwards
total - absolute value of magnetic field - sqrt(Hp^2+He^2+Hn^2).
All data have units in
nanoteslas - nT.
total is probably measured by omni directional solenoid system,
not counted from He, Hp, Hn, so there is <5% discrepance.
Note 2: sometimes there is -100000 values for magnetic fields magnitutes. This is probably the error in data transfer or a way to show that data was not properly acquired. So, the user of library can simply negate this values.
The MIT License (MIT)
Copyright (c) 2013 Anatolij Ostroumov ostroumov095 at gmail dot com
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