GroundStation

Setting Colors On a Ground Station Facility

GMAT allows you to set colors on a ground station facility that you create. The GroundStations are drawn on the GroundTrackPlot 2D graphics display. The GroundStation object's OrbitColor and TargetColor fields are used to set colors on a ground station facility. See the Fields section to read more about these two fields. Also See Color documentation for discussion and examples on how to set colors on a ground station facility.

Marini Troposphere Model Data File

The Marini troposphere model utilizes a data file which contains monthly mean values for the model calculation for different locations on the Earth's surface. This data file's location is specified by the MARINI_TROPO_FILE property in the startup file. Each line in the data file contains a latitude longitude pair, followed by 12 values, one for each month of the year. Each value in the data file combines both the refractivity and a scale height factor into a single integer, which are both used in the Marini model. The two rightmost digits are used to obtain the scale height, while the remaining digits to the left represent the refractivity. The digits used for the scale height have the decimal point placed between the two digits, while the refractivity values have the decimal point placed at the right of its rightmost digit. For example, a value in the data file of 37068 would correspond to a refractivity of 370, and a scale height of 6.8.

The line in the data file is selected for use if it is within one degree of latitude and one degree of longitude of the ground station location. The column is then selected based on the month of the year. If the location of the ground station is within one degree of latitude and longitude of multiple locations in the data file, the first line is the one selected. If the location of the ground station is not within one degree of latitude and longitude of a location in the data file, a default value of 37068 is used instead, regardless of month. The latitude ranges from -90 to 90 degrees, while the longitude spans from 0 to 360 degrees.

Configure a GroundStation in Geodetic coordinates.

          Create GroundStation aGroundStation
aGroundStation.CentralBody      = Earth
aGroundStation.StateType        = Spherical
aGroundStation.HorizonReference = Ellipsoid
aGroundStation.Location1        = 60
aGroundStation.Location2        = 45
aGroundStation.Location3        = 0.01

% or alternatively

aGroundStation.Latitude  = 60
aGroundStation.Longitude = 45
aGroundStation.Altitude  = 0.01
        

Configure a GroundStation in Geocentric coordinates.

          Create GroundStation aGroundStation
aGroundStation.CentralBody      = Earth
aGroundStation.StateType        = Spherical
aGroundStation.HorizonReference = Sphere
aGroundStation.Location1        = 59.83308194090783
aGroundStation.Location2        = 45
aGroundStation.Location3        = -15.99424674414058

% or alternatively

aGroundStation.Latitude        = 59.83308194090783
aGroundStation.Longitude       = 45
aGroundStation.Altitude        = -15.99424674414058

        

Configure a GroundStation in Geocentric coordinates.

          Create GroundStation aGroundStation
aGroundStation.CentralBody = Earth
aGroundStation.StateType   = Cartesian
aGroundStation.Location1   = 2260.697433050543
aGroundStation.Location2   = 2260.697433050542
aGroundStation.Location3   = 5500.485954732006

        

Configure a GroundStation that, when used for navigation, will model how the RF signal is refracted in the atmosphere.

          Create GroundStation aGroundStation
aGroundStation.IonosphereModel       = 'IRI2007';
aGroundStation.TroposphereModel      = 'HopfieldSaastamoinen';

BeginMissionSequence;
        

Attach a Transmitter and Receiver resource to a GroundStation.

          Create Transmitter Transmitter1
Create Receiver Receiver1

Create GroundStation aGroundStation;
aGroundStation.AddHardware = {Transmitter1, Receiver1};

BeginMissionSequence;