LeoEarthRotationTestCase Class Reference

Test that Earth rotation causes the orbital plane to drift westward in the ECEF frame. More...

Inheritance diagram for LeoEarthRotationTestCase:

Collaboration diagram for LeoEarthRotationTestCase:

Public Member Functions
	LeoEarthRotationTestCase ()
Public Member Functions inherited from ns3::TestCase
	TestCase (const TestCase &)=delete
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virtual	~TestCase ()
	Destructor.
std::string	GetName () const
TestCase &	operator= (const TestCase &)=delete

Private Member Functions
void	CheckPosition (Ptr< LeoCircularOrbitMobilityModel > mob, Time orbitalPeriod)
	Check satellite position at the scheduled time.
void	DoRun () override
	Implementation to actually run this TestCase.

Additional Inherited Members
Public Types inherited from ns3::TestCase
enum class	Duration { QUICK = 1 , EXTENSIVE = 2 , TAKES_FOREVER = 3 }
	How long the test takes to execute. More...
Protected Member Functions inherited from ns3::TestCase
	TestCase (std::string name)
	Constructor.
void	AddTestCase (TestCase *testCase, Duration duration=Duration::QUICK)
	Add an individual child TestCase to this test suite.
TestCase *	GetParent () const
	Get the parent of this TestCase.
bool	IsStatusFailure () const
	Check if any tests failed.
bool	IsStatusSuccess () const
	Check if all tests passed.
void	SetDataDir (std::string directory)
	Set the data directory where reference trace files can be found.
void	ReportTestFailure (std::string cond, std::string actual, std::string limit, std::string message, std::string file, int32_t line)
	Log the failure of this TestCase.
bool	MustAssertOnFailure () const
	Check if this run should assert on failure.
bool	MustContinueOnFailure () const
	Check if this run should continue on failure.
std::string	CreateDataDirFilename (std::string filename)
	Construct the full path to a file in the data directory.
std::string	CreateTempDirFilename (std::string filename)
	Construct the full path to a file in a temporary directory.

Detailed Description

Test that Earth rotation causes the orbital plane to drift westward in the ECEF frame.

After exactly one orbital period T, the satellite returns to its starting position on the orbit (orbital offset = 0 again), but the Earth has rotated eastward by angle delta = (T / 24h) * 2 * pi. In the ECEF frame, the ascending node longitude has drifted westward by delta.

Expected ECEF position at time T (with longitude = 0 degrees at time zero): lon_T = -delta x = r * cos(45 deg) * cos(lon_T) y = r * cos(45 deg) * sin(lon_T) [negative = westward drift] z = r * sin(45 deg)

Definition at line 119 of file leo-mobility-test-suite.cc.

Constructor & Destructor Documentation

LeoEarthRotationTestCase()

LeoEarthRotationTestCase::LeoEarthRotationTestCase

(

)

Definition at line 135 of file leo-mobility-test-suite.cc.

References ns3::TestCase::TestCase().

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Member Function Documentation

CheckPosition()

void LeoEarthRotationTestCase::CheckPosition ( Ptr< LeoCircularOrbitMobilityModel > mob, Time orbitalPeriod )

private

Check satellite position at the scheduled time.

Parameters

mob	the mobility model to query
orbitalPeriod	the orbital period used for expected value computation

Definition at line 141 of file leo-mobility-test-suite.cc.

References ns3::Time::GetDouble(), ns3::Hours(), NS_TEST_ASSERT_MSG_EQ_TOL, NS_TEST_ASSERT_MSG_LT, ORBIT_RADIUS_M, and ns3::TOLERANCE.

Referenced by DoRun().

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DoRun()

void LeoEarthRotationTestCase::DoRun ( )

overrideprivatevirtual

Implementation to actually run this TestCase.

Subclasses should override this method to conduct their tests.

Implements ns3::TestCase.

Definition at line 172 of file leo-mobility-test-suite.cc.

References CheckPosition(), ns3::CreateObject(), ns3::Simulator::Destroy(), GM_KM3_S2, ORBIT_HEIGHT_KM, ns3::Simulator::Run(), ns3::Simulator::Schedule(), and ns3::Seconds().

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The documentation for this class was generated from the following file:

• src/mobility/test/leo-mobility-test-suite.cc