GroundStation
Description
The GroundStation
object defines a ground station object belonging
to a satellite scenario.
Creation
You can create GroundStation
object using the groundStation
object function
of the satelliteScenario
object.
Properties
Name
— GroundStation name
"GroundStation
idx"
(default) | string scalar | string vector | character vector | cell array of character vectors
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
ID
— GroundStation ID assigned by simulator
real positive scalar
This property is set internally by the simulator and is read-only.
GroundStation ID assigned by the simulator, specified as a positive scalar.
Latitude
— Geodetic latitude of ground stations
42.3001
(default) | scalar | row vector
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
Longitude
— Geodetic longitude of ground stations
-71.3504
(default) | scalar | row vector
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
Altitude
— Altitude of ground station
0
m (default) | scalar | vector
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
CoordinateAxes
— Coordinate axes triad graphic object
CoordinateAxes
object (default)
You can set this property only when calling coordinateAxes
.
After you call coordinateAxes
,
this property is read-only.
Coordinate axes triad graphic object, specified as CoordinateAxes
object.
MinElevationAngle
— Minimum elevation angle
0
(default) | scalar | vector
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
Accesses
— Access analysis objects
row vector of Access
objects
You can set this property only when calling access
.
After you call access
, this property is
read-only.
Access analysis objects, specified as a row vector of
Access
objects.
ConicalSensors
— Conical sensors
row vector of conical sensors
You can set this property only when calling
the conicalSensor
. After you
call the conicalSensor
function, this property is read-only.
Conical sensors attached to the GroundStation, specified as a row vector of conical sensors.
Transmitters
— Transmitters attached to GroundStation
row vector of Transmitter
objects
You can set this property only when calling transmitter
function. After you call the
transmitter
function, this property is read-only.
Transmitters attached to the GroundStation, specified as a row vector of Transmitter
objects.
MarkerColor
— Color of marker
[1 0 0]
(default) | RGB triplet
| string scalar of color name
| character vector of color name
Color of the marker, specified as a comma-separated pair consisting of
'MarkerColor'
and either an RGB triplet or a string or
character vector of a color name.
For a custom color, specify an RGB triplet or a hexadecimal color code.
An RGB triplet is a three-element row vector whose elements specify the intensities of the red, green, and blue components of the color. The intensities must be in the range
[0,1]
, for example,[0.4 0.6 0.7]
.A hexadecimal color code is a string scalar or character vector that starts with a hash symbol (
#
) followed by three or six hexadecimal digits, which can range from0
toF
. The values are not case sensitive. Therefore, the color codes"#FF8800"
,"#ff8800"
,"#F80"
, and"#f80"
are equivalent.
Alternatively, you can specify some common colors by name. This table lists the named color options, the equivalent RGB triplets, and hexadecimal color codes.
Color Name | Short Name | RGB Triplet | Hexadecimal Color Code | Appearance |
---|---|---|---|---|
"red"
|
"r"
|
[1 0 0]
|
"#FF0000"
|
|
"green"
|
"g"
|
[0 1 0]
|
"#00FF00"
|
|
"blue"
|
"b"
|
[0 0 1]
|
"#0000FF"
|
|
"cyan"
|
"c"
|
[0 1 1]
|
"#00FFFF"
|
|
"magenta"
|
"m"
|
[1 0 1]
|
"#FF00FF"
|
|
"yellow"
|
"y"
|
[1 1 0]
|
"#FFFF00"
|
|
"black"
|
"k"
|
[0 0 0]
|
"#000000"
|
|
"white"
|
"w"
|
[1 1 1]
|
"#FFFFFF"
|
|
Here are the RGB triplets and hexadecimal color codes for the default colors MATLAB® uses in many types of plots.
RGB Triplet | Hexadecimal Color Code | Appearance |
---|---|---|
[0 0.4470 0.7410]
|
"#0072BD"
|
|
[0.8500 0.3250 0.0980]
|
"#D95319"
|
|
[0.9290 0.6940 0.1250]
|
"#EDB120"
|
|
[0.4940 0.1840 0.5560]
|
"#7E2F8E"
|
|
[0.4660 0.6740 0.1880]
|
"#77AC30"
|
|
[0.3010 0.7450 0.9330]
|
"#4DBEEE"
|
|
[0.6350 0.0780 0.1840]
|
"#A2142F"
|
|
MarkerSize
— Size of marker
10
(default) | positive scalar less than 30
Size of the marker, specified as a comma-separated pair consisting of
'MarkerSize'
and a real positive scalar less than 30. The unit
is in pixels.
ShowLabel
— State of GroundStation label visibility
true
or
1
(default) | false
or 0
State of GroundStation label visibility, specified as a
comma-separated pair consisting of
'ShowLabel'
and numerical or
logical value of 1
(true
) or 0
(false
).
Data Types: logical
LabelFontSize
— Font size of GroundStation label
15
(default) | positive scalar in the range [6 30]
Font size of the GroundStation label, specified as a comma-separated pair consisting of
'LabelFontSize'
and a positive scalar in the range [6
30].
LabelFontColor
— Font color of GroundStation label
[1,0,0]
(default) | RGB triplet
| string scalar of color name
| character vector of color name
Font color of the GroundStationlabel, specified as a comma-separated pair consisting of
'LabelFontColor'
and either an RGB triplet or a string or
character vector of a color name.
For a custom color, specify an RGB triplet or a hexadecimal color code.
An RGB triplet is a three-element row vector whose elements specify the intensities of the red, green, and blue components of the color. The intensities must be in the range
[0,1]
, for example,[0.4 0.6 0.7]
.A hexadecimal color code is a string scalar or character vector that starts with a hash symbol (
#
) followed by three or six hexadecimal digits, which can range from0
toF
. The values are not case sensitive. Therefore, the color codes"#FF8800"
,"#ff8800"
,"#F80"
, and"#f80"
are equivalent.
Alternatively, you can specify some common colors by name. This table lists the named color options, the equivalent RGB triplets, and hexadecimal color codes.
Color Name | Short Name | RGB Triplet | Hexadecimal Color Code | Appearance |
---|---|---|---|---|
"red"
|
"r"
|
[1 0 0]
|
"#FF0000"
|
|
"green"
|
"g"
|
[0 1 0]
|
"#00FF00"
|
|
"blue"
|
"b"
|
[0 0 1]
|
"#0000FF"
|
|
"cyan"
|
"c"
|
[0 1 1]
|
"#00FFFF"
|
|
"magenta"
|
"m"
|
[1 0 1]
|
"#FF00FF"
|
|
"yellow"
|
"y"
|
[1 1 0]
|
"#FFFF00"
|
|
"black"
|
"k"
|
[0 0 0]
|
"#000000"
|
|
"white"
|
"w"
|
[1 1 1]
|
"#FFFFFF"
|
|
Here are the RGB triplets and hexadecimal color codes for the default colors MATLAB uses in many types of plots.
RGB Triplet | Hexadecimal Color Code | Appearance |
---|---|---|
[0 0.4470 0.7410]
|
"#0072BD"
|
|
[0.8500 0.3250 0.0980]
|
"#D95319"
|
|
[0.9290 0.6940 0.1250]
|
"#EDB120"
|
|
[0.4940 0.1840 0.5560]
|
"#7E2F8E"
|
|
[0.4660 0.6740 0.1880]
|
"#77AC30"
|
|
[0.3010 0.7450 0.9330]
|
"#4DBEEE"
|
|
[0.6350 0.0780 0.1840]
|
"#A2142F"
|
|
Object Functions
access | Add access analysis objects to satellite scenario |
conicalSensor | Add conical sensor to satellite scenario |
transmitter | Add transmitter to satellite scenario |
receiver | Add receiver to satellite scenario |
gimbal | Add gimbal to satellite, platform, or ground station |
coordinateAxes | Visualize coordinate axes triad of satellite scenario assets |
show | Show object in satellite scenario viewer |
aer | Calculate azimuth angle, elevation angle, and range of another satellite or ground station in NED frame |
hide | Hide satellite scenario entity from viewer |
dopplershift | Calculate Doppler shift at target asset in satellite scenario |
latency | Calculate propagation delay from one asset to another asset |
Examples
Add Ground Stations to Scenario and Visualize Access Intervals
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)
Version History
Introduced in R2021a
See Also
Objects
Functions
show
|play
|hide
|satellite
|access
|groundStation
|conicalSensor
|transmitter
|receiver
Topics
- Multi-Hop Satellite Communications Link Between Two Ground Stations
- Satellite Constellation Access to Ground Station
- Comparison of Orbit Propagators
- Modeling Satellite Constellations Using Ephemeris Data
- Estimate GNSS Receiver Position with Simulated Satellite Constellations
- Model, Visualize, and Analyze Satellite Scenario
- Satellite Scenario Key Concepts
- Satellite Scenario Basics
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