2.2.2 spase://NASA/NumericalData/Iridium/Birkeland/PT900.00S Iridium magnetic field digital indices 2020-07-07T21:14:44Z Various summaries of Birkeland current system magnetic field data from ~70 Iridium spacecraft; cf. Anderson et al, JGR, 107, SMP-11, 2002. spase://SMWG/Person/Brian.J.Anderson GeneralContact spase://VSPO/NumericalData/P_IRIDIUM_HDR_DIGITAL spase://VSPO/NumericalData/Iridium/Birkeland/PT900.00S spase://SMWG/Repository/JHU_APL Online Open AMPERE interface at JHU_APL http://ampere.jhuapl.edu/ As of 9/5,2012, it was expected that Iridium data would be accessible from this site in "a month or so." Text CALIBRATED MagneticField ActivityIndex 1999-02-18T00:00:00 -P21D Data are current to within a few weeks PT900.00S Earth.NearSurface