ISRIM

Model

Millstone Hill EISCAT Svalbard Sondrestrom EISCAT Tromso St. Santin Arecibo Shigaraki MU Radar Millstone Hill Regional Eastern America Regional Europe Regional

Output Parameter

Nel Ti Te V0 IEC

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Day Number (day)	Start	End	Interval	between 1-365
Local Time (hour)	Start	End	Interval	between 0-24
Altitude (km)	Start	End	Interval	between 100-600 [ESR,Tromso, St. Santin,Arecibo], 200-500[MUR], 100-1000[MH]; also used for IEC calculation
Geodetic Latitude (degree)	Start	End	Interval	for regional model only; between 18-70 [EastAmerica], 33-55[MH], or 45-78[Europe]
Solar Activity	F107			previous day’s index; between 70-300
Magnetic Activity	ap index			3-hourly index for the previous 3hours; between 0-100

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References
Zhang, S.-R. and J. M. Holt (2007), Ionospheric Climatology and Variability from Long-term and Multiple Incoherent Scatter Radar Observations: Climatology in Eastern American Sector, J. Geophys. Res., 12, A06328, doi:10.1029/2006JA012206.
Zhang, S.-R., J. M. Holt, A. P. van Eyken, M. McCready, C. Amory-Mazaudier, S. Fukao, and M. Sulzer (2005), Ionospheric local model and climatology from long-term databases of multiple incoherent scatter radars, Geophys. Res. Lett., 32, L20102, doi:10.1029/2005GL023603.
Holt, J. M., S.-R. Zhang, and M. J. Buonsanto (2002), Regional and local ionospheric models based on Millstone Hill incoherent scatter radar data, Geophys. Res. Lett.,, 29(8), 10.1029/2002GL014678.

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