accessIntervals
Description
returns a table of intervals during which the access status corresponding to each
acinterval
= accessIntervals(ac
)access
object in the input vector, ac
, is
true
.
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)
Add Platforms to Scenario and Visualize Access Intervals
Create a satellite scenario.
startTime = datetime(2020,5,1,11,36,0); stopTime = startTime + days(1); sampleTime = 60; sc = satelliteScenario(startTime,stopTime,sampleTime); lat = 10; lon = -30;
Add a platform using the given trajectory in the satellite scenario.
trajectory = geoTrajectory([40.6413,-73.7781,10600;32.3634,-64.7053,10600],[0,2*3600],AutoPitch=true,AutoBank=true); pltf = platform(sc,trajectory);
Add a satellite 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 platform.
ac = access(sat,pltf); intvls = accessIntervals(ac)
intvls=7×8 table
Source Target IntervalNumber StartTime EndTime Duration StartOrbit EndOrbit
_____________ ____________ ______________ ____________________ ____________________ ________ __________ ________
"Satellite 2" "Platform 1" 1 01-May-2020 14:07:00 01-May-2020 14:54:00 2820 1 2
"Satellite 2" "Platform 1" 2 01-May-2020 17:11:00 01-May-2020 18:01:00 3000 3 3
"Satellite 2" "Platform 1" 3 01-May-2020 20:16:00 01-May-2020 21:06:00 3000 4 4
"Satellite 2" "Platform 1" 4 01-May-2020 23:22:00 02-May-2020 00:11:00 2940 5 5
"Satellite 2" "Platform 1" 5 02-May-2020 02:31:00 02-May-2020 03:15:00 2640 6 6
"Satellite 2" "Platform 1" 6 02-May-2020 05:43:00 02-May-2020 06:22:00 2340 7 7
"Satellite 2" "Platform 1" 7 02-May-2020 08:54:00 02-May-2020 09:33:00 2340 8 8
Play the scenario to visualize the platform and the satellite.
play(sc)
Input Arguments
ac
— Access analysis
row vector of Access
objects
Access analysis, specified as a row vector of Access
objects.
Outputs Arguments
acinterval
— Intervals during which access is true
table
Intervals during which access is true
, returned as a table.
Each row of the table denotes a specific interval. The columns of the table are
named Source
, Target
,
IntervalNumber
, StartTime
,
EndTime
, Duration
(in seconds),
StartOrbit
, and EndOrbit
.
Source
and Target
are the names of the first and
last node, respectively, which define the access analysis.
If
Source
is a satellite or an object that is directly or indirectly attached to a satellite, thenStartOrbit
andEndOrbit
correspond to the satellite associated withSource
.If
Target
is a satellite or an object that is directly or indirectly attached to a satellite, thenStartOrbit
andEndOrbit
correspond to the satellite associated withTarget
. Otherwise,StartOrbit
andEndOrbit
areNaN
because they are associated with ground stations.
Note
When the AutoSimulate
property of satellite scenario is true
, the
access intervals between StartTime
and StopTime
are returned. When the property is false
, the access intervals between
StartTime
and SimulationTime
are returned.
Version History
Introduced in R2021a
See Also
Objects
Functions
show
|play
|hide
|groundStation
|accessPercentage
|accessStatus
|access
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