2.2.2 spase://VSPO/NumericalData/NOAA/13/SEM/PT1800.00S NOAA POES Hemispheric Power Index 2012-04-11T10:42:31 NOAA POES Hemispheric Power Index (HPI) is an index on a scale of 0-10 measuring power deposited in the polar regions by precipitating electrons and protons being measured by the series of NOAA/POES (nee TIROS) spacecraft since 1978. Each index value represents one spacecraft polar pass. The data include the HPI value and a measure of the power deposited in gigawatts. UNKNOWN GeneralContact spase://VSPO/NumericalData/P_HPI_HDR_SEL spase://SMWG/Repository/NOAA/SEC Online Open NOAA/Space Environment Center web site http://www.swpc.noaa.gov/ftpdir/lists/hpi/ Text CALIBRATED spase://SMWG/Instrument/NOAA/13/SEM EnergeticParticles ActivityIndex 1978-11-02T00:00:00 -P1D Data are current to within hours. PT1800.00S Earth.NearSurface