Tools and Models:Emery HP plus indices to 11107
Update 1 June 2014
- Plot of HPi from 1982-2013 (summer HPi peaks especially from NOAA satellites)
- Plot of HPe NH from 1978-2013
- Plot of HPe SH from 1978-2013
- Plot of HPe SH/NH from 1978-2013(winter HPe peaks especially from NOAA satellites)
Hemispheric power (HP) estimates from NOAA satellites since November 2, 1978 and DMSP satellites since December 28, 1982 were studied by Barbara Emery (email@example.com, 303-497-1596, HAO/NCAR, Boulder, CO, USA) and intercalibrated on an hourly basis. Ion hemispheric powers (HPi) were originally only available from NOAA satellites as HPi=HPt-HPe where HPe is the electron hemispheric power and HPt is the power from both electrons and ions, where ion information is available from January 1, 1982. However, in 2014, Ernest Holman from AFRL contributed HPi from DMSP satellites using all but the highest energy channel from 20-30 keV. These DMSP HPi estimates will be revised later to include the 20-30 keV channel. Previous estimates from Emery et al. (2006) show this single channel to contain about a 30% increase in HPi. The original NOAA and DMSP calibrations are also available on the CEDAR and madrigal databases. The intercalibration analysis and results are described in:
- Emery, B. A., D. S. Evans, M. S. Greer, E. Holeman, K. Kadinsky-Cade, F. J. Rich, and W. Xu (2006), The low energy auroral electron and ion hemispheric power after NOAA and DMSP intersatellite adjustments, NCAR Scientific and Technical Report, TN-470+STR (http://cedarweb.hao.ucar.edu/wiki/index.php/Media:Str470.pdf).
- Emery, B. A., V. Coumans, D. S. Evans, G. A. Germany, M. S. Greer, E. Holeman, K. Kadinsky-Cade, R. J. Rich, and W. Xu (2008), Seasonal, Kp, solar wind, and solar flux variations in long-term single-pass satellite estimates of electron and ion auroral hemispheric power, J. Geophys. Res., 113, A06311, doi:10.1029/2007JA012866.
- Emery, B. A., I. G. Richardson, D. S. Evans, R. J. Rich, and W. Xu (2009), Solar wind structure sources and periodicities of global electron hemispheric power over three solar cycles, J. Atmos. Sol. Terr. Phys., 71, 1157–1175, doi:10.1016/j.jastp.2008.08.005.
- Emery, B. A., I. G. Richardson, D. S. Evans, F. J. Rich, G. R. Wilson (2011), Solar rotational periodicities and the semiannual variation in the solar wind, radiation belt, and aurora. Solar Physics, doi:10.1007/s11207-011-9758-x.
The intersatellite calibrations of HP were last updated in May 2014 through day 365 in 2013 and are listed along with many other indices in hourly (8.8MB per year) and daily (0.5MB per year) files linked below. Previous intersatellite calibrations were updated in April 2011 to 11107 at this ascii site, and in the CEDAR DB as binary files in October 2007.
Please acknowledge the CEDAR Database as: This study used indices from the CEDAR Database at the National Center for Atmospheric Research which is supported by the National Science Foundation.
The CEDAR Database Rules of the Road require offers of co-authorship (which can be turned down in favor of acknowledgements instead) and checking for proper use of the data from the following Contact Persons:
- Contact Barbara Emery (firstname.lastname@example.org) for HPe, HPi, Pe, and Pi. (NOTE: The DMSP calibrations of their HPe are available as DMSP Hemispheric Power, and are usually different by multiplicative factors that can change in time but are within a factor of 2.)
- Contact Oleg Troshichev (email@example.com) for Vostok Polar Cap index (is old AARI and not the new unified analysis)
- Contact Peter Stauning (firstname.lastname@example.org) for Thule Polar cap index (is old, mostly missing, and should probably be revised)
- Contact Thomas Sotirellis (email@example.com) for magnetotail stretching index (mti) and NH SuperDARN (SD) index (both updated last in March 2005).
- Contact Gordon Wilson (firstname.lastname@example.org) for any use of the equatorward boundary magnetic latitude of the aurora at midnight(eqb or ABI) which is the older version without knowledge of the hemisphere it is from, and only including the best ~30% of the estimates. (NOTE: The new eqb with ~3 times more estimates is also available as the DMSP Midnight Auroral Boundary and since October 2013, is updated daily at the CEDAR Madrigal Archive at http://cedar.openmadrigal.org .)
- Contact Ian Richardson (email@example.com) for solar structure estimates
Hourly Yearly Files (~8.8MB each)
- Format for the hourly file
Daily Yearly Files (~0.5MB each)