gnsstk::CNavCrossSourceFilter Class Reference

Detailed Description

Filter GPS subframes using a voting algorithm across a single epoch. This may be used for a single receiver where multiple codes can be compared against each other, or across multiple receivers (with or without multiple codes).

Attention

Processing depth = 2 epochs.

Definition at line 57 of file CNavCrossSourceFilter.hpp.

#include <CNavCrossSourceFilter.hpp>

Inheritance diagram for gnsstk::CNavCrossSourceFilter:

Public Member Functions
	CNavCrossSourceFilter ()
virtual void	dump (std::ostream &s) const
virtual std::string	filterName () const noexcept
	Return the filter name. More...
virtual void	finalize (NavMsgList &msgBitsOut)
virtual unsigned short	getMinIdentical () const
virtual unsigned	processingDepth () const noexcept
	Internally stores 1 epoch's worth of subframe data. More...
virtual void	setMinIdentical (const unsigned value)
virtual void	validate (NavMsgList &msgBitsIn, NavMsgList &msgBitsOut)
Public Member Functions inherited from gnsstk::NavFilter
virtual void	dumpRejected (std::ostream &out) const
	Debug support. More...
	NavFilter ()
virtual std::string	reasonTerse () const noexcept
virtual std::vector< std::string >	reasonVerbose () const noexcept

Public Attributes
unsigned short	minIdentical
Public Attributes inherited from gnsstk::NavFilter
NavMsgList	rejected

Protected Types
typedef std::map< CNavFilterData *, NavMsgList, CNavMsgSort >	MessageMap
	Map from subframe data to source list. More...
typedef std::map< uint32_t, MessageMap >	NavMap
	Map from PRN to SubframeMap. More...

Protected Member Functions
void	examineMessages (NavMsgList &msgBitsOut)
Protected Member Functions inherited from gnsstk::NavFilter
void	accept (const NavMsgList &valid, NavMsgList &msgBitsOut)
void	accept (NavFilterKey *data, NavMsgList &msgBitsOut)
void	reject (const NavMsgList &invalid)
void	reject (NavFilterKey *data)

Protected Attributes
gnsstk::CommonTime	currentTime
	Most recent time. More...
NavMap	groupedNav
	Nav subframes grouped by prn and unique nav bits. More...

Additional Inherited Members
Public Types inherited from gnsstk::NavFilter
typedef std::list< NavFilterKey * >	NavMsgList

Member Typedef Documentation

MessageMap

typedef std::map<CNavFilterData*, NavMsgList, CNavMsgSort> gnsstk::CNavCrossSourceFilter::MessageMap

protected

Map from subframe data to source list.

Definition at line 103 of file CNavCrossSourceFilter.hpp.

NavMap

typedef std::map<uint32_t, MessageMap> gnsstk::CNavCrossSourceFilter::NavMap

protected

Map from PRN to SubframeMap.

Definition at line 105 of file CNavCrossSourceFilter.hpp.

Constructor & Destructor Documentation

CNavCrossSourceFilter()

gnsstk::CNavCrossSourceFilter::CNavCrossSourceFilter

(

)

Definition at line 44 of file CNavCrossSourceFilter.cpp.

Member Function Documentation

dump()

void gnsstk::CNavCrossSourceFilter::dump ( std::ostream &  s ) const

virtual

Debug method to unspool contents in a manner appropriate for inspection.

Definition at line 119 of file CNavCrossSourceFilter.cpp.

examineMessages()

void gnsstk::CNavCrossSourceFilter::examineMessages ( NavMsgList &  msgBitsOut )

protected

Filter by vote.

Note

Bare minimum for producing output is 2 out of 2 matching subframes. If there are no matching subframes, or fewer than 2 subframes are present in groupedNav, no output will be produced.

Parameters

[out]

msgBitsOut

Nav messages passing the voting algorithm are stored here.

Definition at line 76 of file CNavCrossSourceFilter.cpp.

filterName()

virtual std::string gnsstk::CNavCrossSourceFilter::filterName ( ) const

inlinevirtualnoexcept

Return the filter name.

Implements gnsstk::NavFilter.

Definition at line 85 of file CNavCrossSourceFilter.hpp.

finalize()

void gnsstk::CNavCrossSourceFilter::finalize ( NavMsgList &  msgBitsOut )

virtual

Flush the remaining contents of groupedNav.

Parameters

[out]

msgBitsOut

Any remaining valid (by vote) nav messages are stored here on return.

Implements gnsstk::NavFilter.

Definition at line 68 of file CNavCrossSourceFilter.cpp.

getMinIdentical()

virtual unsigned short gnsstk::CNavCrossSourceFilter::getMinIdentical ( ) const

inlinevirtual

Definition at line 91 of file CNavCrossSourceFilter.hpp.

processingDepth()

virtual unsigned gnsstk::CNavCrossSourceFilter::processingDepth ( ) const

inlinevirtualnoexcept

Internally stores 1 epoch's worth of subframe data.

Implements gnsstk::NavFilter.

Definition at line 81 of file CNavCrossSourceFilter.hpp.

setMinIdentical()

virtual void gnsstk::CNavCrossSourceFilter::setMinIdentical ( const unsigned  value )

inlinevirtual

Definition at line 88 of file CNavCrossSourceFilter.hpp.

validate()

void gnsstk::CNavCrossSourceFilter::validate ( NavMsgList &  msgBitsIn, NavMsgList &  msgBitsOut  )

virtual

Add CNAV messages to the voting collection (groupedNav).

Precondition

NavFilterKey::timeStamp is set to either the the time of transmission of the message/

NavFilterKey::prn is set

CNavFilterData::sf is set

Parameters

[in,out]	msgBitsIn	A list of CNavFilterData* objects containing GPS CNAV messages.
[out]	msgBitsOut	The messages successfully passing the filter. The contents of msgBitsOut will always be one epoch behind msgBitsIn (meaning data from previous, but not current calls to validate will be here).

Implements gnsstk::NavFilter.

Definition at line 49 of file CNavCrossSourceFilter.cpp.

Member Data Documentation

currentTime

gnsstk::CommonTime gnsstk::CNavCrossSourceFilter::currentTime

protected

Most recent time.

Definition at line 110 of file CNavCrossSourceFilter.hpp.

groupedNav

NavMap gnsstk::CNavCrossSourceFilter::groupedNav

protected

Nav subframes grouped by prn and unique nav bits.

Definition at line 108 of file CNavCrossSourceFilter.hpp.

minIdentical

unsigned short gnsstk::CNavCrossSourceFilter::minIdentical

Definition at line 95 of file CNavCrossSourceFilter.hpp.

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

• CNavCrossSourceFilter.hpp
• CNavCrossSourceFilter.cpp