groundStation
Syntax
Description
groundStation(
adds a default scenario
)GroundStation
object to the
specified satellite scenario.
groundStation(
sets the Latitude and Longitude properties of the ground station to scenario
,lat
,lon
)lat
and
lon
, respectively. lat
and
lon
must be of the same length. This length specifies the number of
ground stations that the function adds to the input scenario. Together,
lat
and lon
indicate the locations of the ground
stations.
groundStation(___,
sets
options using one or more name-value arguments in addition to any input argument combination
from previous syntaxes. For example, Name,Value
)'MinElevationAngle',10
specifies a
minimum elevation angle of 10 degrees.
returns a
vector of handles to the added ground stations. Specify any input argument combination from
previous syntaxes.gs
= groundStation(___)
Examples
Create a satellite scenario and add ground stations from latitudes and longitudes.
startTime = datetime(2020,5,1,11,36,0); stopTime = startTime + days(1); sampleTime = 60; sc = satelliteScenario(startTime,stopTime,sampleTime); lat = 10; lon = -30; gs = groundStation(sc,lat,lon);
Add satellites using Keplerian elements.
semiMajorAxis = 10000000;
eccentricity = 0;
inclination = 10;
rightAscensionOfAscendingNode = 0;
argumentOfPeriapsis = 0;
trueAnomaly = 0;
sat = satellite(sc,semiMajorAxis,eccentricity,inclination, ...
rightAscensionOfAscendingNode,argumentOfPeriapsis,trueAnomaly);
Add access analysis to the scenario and obtain the table of intervals of access between the satellite and the ground station.
ac = access(sat,gs); intvls = accessIntervals(ac)
intvls=8×8 table
Source Target IntervalNumber StartTime EndTime Duration StartOrbit EndOrbit
_____________ __________________ ______________ ____________________ ____________________ ________ __________ ________
"Satellite 2" "Ground station 1" 1 01-May-2020 11:36:00 01-May-2020 12:04:00 1680 1 1
"Satellite 2" "Ground station 1" 2 01-May-2020 14:20:00 01-May-2020 15:11:00 3060 1 2
"Satellite 2" "Ground station 1" 3 01-May-2020 17:27:00 01-May-2020 18:18:00 3060 3 3
"Satellite 2" "Ground station 1" 4 01-May-2020 20:34:00 01-May-2020 21:25:00 3060 4 4
"Satellite 2" "Ground station 1" 5 01-May-2020 23:41:00 02-May-2020 00:31:00 3000 5 5
"Satellite 2" "Ground station 1" 6 02-May-2020 02:50:00 02-May-2020 03:39:00 2940 6 6
"Satellite 2" "Ground station 1" 7 02-May-2020 05:58:00 02-May-2020 06:47:00 2940 7 7
"Satellite 2" "Ground station 1" 8 02-May-2020 09:06:00 02-May-2020 09:56:00 3000 8 9
Play the scenario to visualize the ground stations.
play(sc)
Input Arguments
Satellite scenario, specified as a satelliteScenario
object.
Latitude and longitude of the ground station, specified as a real-valued scalar or real-valued vector.
Name-Value Arguments
Specify optional pairs of arguments as
Name1=Value1,...,NameN=ValueN
, where Name
is
the argument name and Value
is the corresponding value.
Name-value arguments must appear after other arguments, but the order of the
pairs does not matter.
Before R2021a, use commas to separate each name and value, and enclose
Name
in quotes.
Example: 'MinElevationAngle',10
specifies a minimum elevation angle of
10 degrees.
Satellite scenario viewer, specified as a scalar, vector, or array of satelliteScenarioViewer
objects. If the AutoSimulate
property of the scenario is false
,
adding a satellite to the scenario disables any previously available timeline and
playback widgets.
You can set this property only when calling the groundStation
function.
After you call groundStation
function, this property is read-only.
groundStation name, specified as a comma-separated pair consisting of
'Name'
and a string scalar, string vector, character vector or a cell
array of character vectors.
If only one groundStation is added, specify
Name
as a string scalar or a character vector.If multiple groundStations are added, specify
Name
as a string scalar, character vector, string vector or a cell array of character vectors. All groundStations added as a string scalar or a character vector are assigned the same specified name. The number of elements in the string vector or cell array of character vector must equal the number of groundStations being added. Each groundStation is assigned the corresponding name from the vector or cell array.
In the default value, idx is the ID assigned by satellite scenario.
Data Types: char
| string
You can set this property only when calling groundStation. After you call groundStation, this property is read-only.
Geodetic latitude of ground stations, specified as a scalar. Values must be in the range [-90, 90].
If you add only one ground station, specify Latitude as a scalar double.
If you add multiple ground stations, specify Latitude as a vector double whose length is equal to the number of ground stations being added.
When latitude and longitude are specified as lat, lon
inputs to
groundStation, Latitude specified as a name-value argument takes precedence.
Data Types: double
You can set this property only when calling groundStation. After you call groundStation, this property is read-only.
Geodetic longitude of ground stations, specified as a scalar or a vector. Values must be in the range [-180, 180].
If you add only one ground station, specify longitude as a scalar.
If you add multiple ground stations, specify longitude as a vector whose length is equal to the number of ground stations being added.
When longitude and longitude are specified as lat, lon
inputs to
groundStation, longitude specified as a name-value argument takes precedence.
Data Types: double
You can set this property only when calling groundStation. After you call groundStation, this property is read-only.
Altitude of ground stations, specified as a scalar or a vector.
If you specify
Altitude
as a scalar, the value is assigned to each ground station in the groundStation.If you specify
Altitude
as a vector, the vector length must be equal to the number of ground stations in the groundStation.
When latitude and longitude are specified as lat, lon
inputs to
groundStation, Latitude specified as a name-value argument takes precedence.
Data Types: double
Minimum elevation angle of a satellite for the satellite to be visible from the ground
station, and for the ground station to be visible from the satellite in degrees,
specified as a scalar or row vector. Values must be in the range [–90, 90]. For access
and link closure to be possible, the elevation angle must be at least equal to the value
specified in MinElevationAngle
.
If you specify
MinElevationAngle
as a scalar, the value is assigned to each ground station in the groundStation.If you specify
MinElevationAngle
as a vector, the vector length must be equal to the number of ground stations in the groundStation.
When the AutoSimulate
property of the satellite scenario is
false
, MinElevationAngle
property can be
modified while the SimulationStatus
is NotStarted
or
InProgress
.
Data Types: double
Elevation angles for visibility mask in degrees, specified as a scalar, an N-element row vector , or a 2-D matrix. This property works
with MaskAzimuthEdges
to create a visibility mask. The length of the
MaskElevationAngle
row vector must be one shorter than the
MaskAzimuthEdges
row vector.
The value of all MaskElevationAngle
angles must be from -90 to 90.
N is m-1, where m is the number
of elements in MaskAzimuthEdges
.
If
MaskElevationAngle
is a scalar double or row vector double, this value is assigned to each ground station in theGroundStation
object.If
MaskElevationAngle
is a 2-D matrix double, the number of rows must be equal to the number of ground stations in theGroundStation
object.
When the AutoSimulate
property of the satellite scenario is false
,
MaskElevationAngle
property can be modified while the SimulationStatus
is NotStarted
or
InProgress
.
Data Types: double
Azimuth angles for the visibility mask in degrees, specified as a row vector of angles,
or a 2-D matrix. This parameter works with MaskElevationAngle
property
to create a visibility mask. The length of the MaskAzimuthEdges
property row vector must be one longer than the MaskElevationAngle
property row vector. The value of all MaskAzimuthEdges
angles must be
from 0 to 360 degrees.
If
MaskAzimuthEdges
is a row vector, this value is assigned to each ground station added to theGroundStation
object.If
MaskAzimuthEdges
is a 2-D matrix, the number of rows in the matrix must be equal to the number of ground stations in theGroundStation
object.If
MaskAzimuthEdges
is not specified, this value is automatically generated for each ground station as a linearly spaced row vector from 0 to 360 degrees. The row vector is one value longer than the correspondingMaskElevationAngle
row vector.
When the AutoSimulate
property of the satellite scenario is false
,
MaskAzimuthEdges
property can be modified while the SimulationStatus
is NotStarted
or
InProgress
.
Data Types: double
Output Arguments
Ground station in the scenario, returned as a GroundStation
object
belonging to the satellite scenario specified by the input
scenario
.
You can modify the GroundStation
object by
changing its property values. The name-value arguments used when calling this function
correspond to property names.
Version History
Introduced in R2021aStarting in R2025a, using the MinElevationAngle
property to specify
the minimum elevation angle between the satellite and the ground station is discouraged.
Instead, use the MaskElevationAngle
and the
MaskAzimuthEdges
properties in the ground station object and function
to account for local obstructions.
See Also
Objects
Functions
Topics
- Satellite Visibility Analysis Using Terrain (Satellite Communications Toolbox)
- Model, Visualize, and Analyze Satellite Scenario
- Satellite Scenario Key Concepts
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