Virtual Ionosphere, Thermosphere, Mesosphere Observatory (VITMO)Models and Related Algorithms

* International Reference Ionosphere models: IRI-2007, IRI-2012, IRI-2016 have been permanently discontinued. Please consult the IRI homepage at irimodel.org for alternative options

* MSIS-E-90 Atmosphere Model has been permanently discontinued. Please consult the MSIS homepage at https://ccmc.gsfc.nasa.gov/modelweb/ for alternative options.

* DGRF/IGRF Geomagnetic Field Model 1900 - 2020 and Related Parameters has been permanently discontinued. Please consult the IGRF homepage at https://ccmc.gsfc.nasa.gov/modelweb/ for alternative options.

* For Corrected Geomagnetic Coordinates and related Parameters see https://omniweb.sci.gsfc.nasa.gov/vitmo/cgm.html