Virtual Ionosphere, Thermosphere, Mesosphere Observatory (VITMO)
MSIS-E-90 Atmosphere Model

This page enables the computation and plotting of any subset of MSIS parameters: neutral temperature, exospheric temperature, densities of He, O, N2, O2, Ar, H, and N, and total density.

* Go to the MSISE description

*How to get model data from command line

* Select Date (1958/03 - 2015/10) and Time
Year Month: Day(1-31):
Time Hour of day (e.g. 1.5):
* Select Coordinates
Coordinates Type
Latitude(deg.,from -90. to 90.): Longitude(deg.,from 0. to 360.):
Height (km, from 0. to 1000.):
* Select a Profile type and its parameters:
Start Stop Stepsize

Optional Input parameters:
Note :If user does not specify these parameters,they will be taken from real data base
F10.7(daily) ( 50 - 400 )   F10.7(3-month avg) ( 50 - 350 )   ap(daily)( 0 - 40 )

*Select output form:
List model data
Create model data file in ASCII format  for downloading

Plot model data 
      Note 1: The first selected parameter below always will be along the X-axis, the other selections will be along Y-axis.
              (e.g. if you want a Height profile, you may specify Height as the first parameter in the listing below.)     
      Note 2: User may get scatter plot if he specifies any two parameters below and changes the "connect type"  
              in the "Advanced plot selections" to "show points only"   

* Select desired parameters
Independent Variables
Day of month
Day of year
Hour of day
Height, km
Geographic/Geomagnetic Latitude, deg.
      (depend on user's choice above)
Geographic/Geomagnetic Longitude, deg.
      (depend on user's choice above)
Calculated MSIS Model Parameters
Atomic Oxygen (O), cm-3
Nitrogen (N2), cm-3
Oxygen O2, cm-3
Total Mass Density, g/cm-3
Neutral Temperature, K
Exospheric Temperature, K
Helium (He), cm-3
Argon (Ar), cm-3
Hydrogen (H), cm-3
Nitrogen (N), cm-3
Indexes taken from user's input or from data base
F10.7(3-month avg)

ap(00-03 hours prior used)
ap(03-06 hours prior used)
ap(06-09 hours prior used)
ap(09-12 hours prior used)
ap(12-33 hours prior used)
ap(33-59 hours prior used)
Ancillary parameters
O/N2 ratio
O/O2 ratio

Advanced plot selections (optional)
Connect Type: Character size(0.5-2.0)
Plot Symbol: Symbol Size(0.1-4.0):
Y-axis Scale: X-axis Scale:
Image size (pixels):X: Y:

Send questions about this model to Dr. Dieter Bilitza, E-mail:
Page Curator: Dr. Natalia Papitashvili, E-mail:,
Mail Code 672, NASA/Goddard Space Flight Center, Greenbelt, MD 20771

NASA Official: Dr. Robert McGuire, Head of the Space Physics Data Facility