2.4.0 spase://CNES/NumericalData/CDPP-Archive/ISGI/Geomagnetic-Indices/K-index/INDICES_PLANETARY K-derived planetary indices (am, aa, and Kp) https://doi.org/10.24400/802406/jwpr-q031 2022-06-06T14:31:22Z This data set contains the K-derived planetary indices (am, aa, and Kp). The K-derived planetary indices (am, an, as, aa, and Kp) were traditionally computed on a monthly basis with K-indices hand scaled on analogue magnetograms and provided as hard copies by the observatories. Provisional values were thus circulated with a delay of a few weeks after the end of the month of observation. Definitive values were computed once definitive K values made available by all the observatories. Provisional and definitive values are still computed with the K values provided by the observatories. Provisional values are circulated on a monthly basis with a few weeks delay for am, an, and as, twice a month with a few weeks delay for Ap, and on a weekly basis with a few days delay for aa. Recent indices which are not yet validated are provisional Indices and indicated in the data files with a provisional flag. spase://CNES/Person/CDPP-Archive/Michel.Menvielle ProjectScientist spase://CNES/Person/CDPP-Archive/CDPP.general.contact GeneralContact spase://CNES/Repository/CDPP-Archive/REGARDS-CDPP Online REGARDS https://regards.cnes.fr/user/cdpp/modules/1777?sp=DatasetName;q=DatasetName:INDICES_PLANETARY Access via CNES Data Archive for CDPP Binary Calibrated spase://CNES/Instrument/CDPP-Archive/ISGI/Geomagnetic-Indices MagneticField ActivityIndex 1975-01-01T00:00:00Z 2005-12-31T00:00:00Z Earth.Surface Kp (planetary) 3-hour index Kp (planetary) 3-hour index Unit: quasi-logarithmic scale as a third of K units (28 values): 0o, 0+, 1-, 1o, 1+, 2-, ... , 8+, 9-, 9o. Other aa 3-hour index aa index ( K-derived planetary) represents the activity level at an invariant magnetic latitude of about 50° nT 10^-9>T Other am 3-hour index am 3-hour index provides a characterization of global geomagnetic activity using a large set of stations representing all longitudes and possible hemispheric discrepancies. nT 10^-9>T Other