{"HAPI":"3.3.1","status":{"code":1200,"message":"OK"},"startDate":"2010-06-01T00:00:00Z","stopDate":"2023-09-19T00:00:00Z","cadence":"PT1S","timeStampLocation":"center","modificationDate":"2026-08-28T08:30:05Z","maxRequestDuration":"P3D","title":"Mineyama Station (Real-time, 1-second)","description":"Mineyama (MYA) 1-second geomagnetic field variations (H, E, Z, F) from a station operated by WDC for Geomagnetism, Kyoto. H, E and Z are VARIATION components, where E is the magnetic eastward variation in nT. The baseline is not accurate and is not controlled over time, so these are not absolute field measurements: at some stations no baseline is added at all and H is only of the order of tens to hundreds of nT, while at others only an approximate value has been added (the source's approximate baseline for each station is reproduced in the comment block of the IAGA2002 output). That baseline is what the source supplies for transforming the reported elements: D is needed to transform the HEZ variation data to the widely used XYZ orientation, and H to convert E-variations in nT to variations in minutes of arc. Use the data for variations, not for absolute levels, and do not compare levels between stations or across time without establishing your own baseline. The data were collected for real-time monitoring and are served as recorded: no noise removal, spike rejection or baseline control has been applied. Caution: timestamps may be inaccurate during periods when GPS timing or the network connection was unavailable and the recording PC's clock was used instead. Timestamps are bin centers (timeStampLocation=center). Real-time monitoring data, unprocessed.","licenseURL":"https://wdc.kugi.kyoto-u.ac.jp/wdc/Sec3.html","x_observatory":{"name":"Mineyama","iagaCode":"MYA","latitude":35.573,"longitude":135.05,"elevation":132},"x_sourceMetadata":[{"startDate":"2010-06-01T00:00:00Z","stopDate":"2023-09-19T00:00:00Z","sourceOfData":"Kyoto University","sensorOrientation":"HEZF","digitalSampling":"1 seconds","dataIntervalType":"1-second instantaneous","dataType":"Variation"}],"parameters":[{"name":"Time","type":"isotime","units":"UTC","fill":null,"length":24,"label":"Time"},{"name":"geomagneticFieldH","type":"double","units":"nT","fill":"99999.0","label":"H","description":"Horizontal intensity VARIATION, as reported by the station. Not an absolute value: the baseline is approximate or absent (see the dataset description)."},{"name":"geomagneticFieldE","type":"double","units":"nT","fill":"99999.0","label":"E","description":"Magnetic eastward VARIATION, in nT (not minutes of arc). Baseline-free variation about the station's own reference direction."},{"name":"geomagneticFieldZ","type":"double","units":"nT","fill":"99999.0","label":"Z","description":"Vertical (downward+) component VARIATION. Not an absolute value: the baseline is approximate or absent (see the dataset description)."},{"name":"geomagneticFieldF","type":"double","units":"nT","fill":"99999.0","label":"F","description":"Total field intensity from an independent scalar instrument, an absolute measurement unlike the H, E and Z variation columns. Fill at stations whose source annotates F as computed from the vector components (F=SQRT(H**2+E**2+Z**2)); computed values are not served."},{"name":"versionCode","type":"integer","units":null,"fill":null,"label":"Version Code","description":"Processing status code Mm (M: 0=real-time; m=minor, the recalculation generation: 0=first conversion, 1 and above=reconverted after the source changed). All currently served data are 00 (real-time)."}]}