Assessment of Ionospheric Models

By Space Environment Corporation
Developed under NSF/ATM Award 0317777.

Figure 1. The profile data are plotted in black and the F10.7a values are plotted in red. the four graphs present (a) the Total Electron Content in the measured profile, (b) the F Region peak density in /cc, (c) the F Region peak height in km, (d) the altitude range of the profile.

The Assessment of Ionospheric Models (AIM) database is based on 4 decades of Arecibo Observatory (AO) ionospheric measurements by the AO Incoherent Scatter Radar. The radar location is at 18.3 degrees North and 66.7 degrees West, which is in the transition latitude between the mid-latitude and low-latitude ionosphere regions. The AIM database is based on reduce electron density profiles to a standard altitude and Universal time grid. The data span four solar cycles with all solar, seasonal, and geomagnetic conditions.

The electron density profiles are contained in 699 day files and are available for download. The list of days for modelers to run for the full climatological study are here. There is a more limited set of days from the recent years to be used for the space weather assessment of ionospheric models. There are 18 periods of measurements from 1998 to 2006. These days are listed here.

The AIM Package has been delivered to the Community Coordinated Modeling Center (CCMC) and is being implemented as part of the CCMC Ionospheric Metrics.

Space Weather Assessment of Ionospheric Models

Space Weather Assessment (Description) is performed on three models:

  • IRI 1995, 2000, 2007
  • LLIONS v1.5j
  • SAMI2 0.98

    Climatological Assessment of Ionospheric Models

    Climatology Assessment (Description) is performed on the same three models:

  • IRI 1995, 2000, 2007
  • LLIONS v1.5j
  • SAMI2 0.98