Detailed Description
Defines the class that provide the ability to convert between BeiDou time (BDT) and a supported time system (UTC, GPS, GLONASS, Galileo), using data extracted from BDS navigation messages.
- Note
- The ICD isn't clear on the topic of reference times. While GPS LNAV has an explicit reference time in its time offset data, BeiDou does not. As such, when PNBBDSD2NavDataFactory decodes this data, it sets the reference time to our "best guess", which is the start of the transmit week (based on how tE is used).
- This class is used to encapsulate the data from subframe 5, pages 9 and 10. Page 10 is for UTC conversion and has additional factors not present in page 9 (see the data fields). Additionally, the parameter subscripts differ depending on the target time system, however mathematically they are identical terms and generic names are used in this class to represent the data.
Definition at line 67 of file BDSD2NavTimeOffset.hpp.
#include <BDSD2NavTimeOffset.hpp>
Inheritance diagram for gnsstk::BDSD2NavTimeOffset:
Public Member Functions | |
| BDSD2NavTimeOffset () | |
| Initialize all data to 0. More... | |
| NavDataPtr | clone () const override |
| Create a deep copy of this object. More... | |
| virtual double | effEnd () const |
| virtual double | effStart () const |
| bool | validate () const override |
 Public Member Functions inherited from gnsstk::StdNavTimeOffset | |
| void | dump (std::ostream &s, DumpDetail dl) const override |
| TimeCvtSet | getConversions () const override |
| bool | getOffset (TimeSystem fromSys, TimeSystem toSys, const CommonTime &when, double &offset) const override |
| StdNavTimeOffset () | |
| Initialize all data to 0. More... | |
| Public Member Functions inherited from gnsstk::TimeOffsetData | |
| std::list< std::string > | compare (const NavDataPtr &right) const override |
| CommonTime | getNearTime () const override |
| bool | isSameData (const NavDataPtr &right) const override |
| TimeOffsetData () | |
| Set the messageType. More... | |
| virtual | ~TimeOffsetData () |
| Obligatory virtual destructor. More... | |
| Public Member Functions inherited from gnsstk::NavData | |
| virtual std::string | getClassName () const |
| std::string | getDumpTime (DumpDetail dl, const CommonTime &t) const |
| std::string | getDumpTimeHdr (DumpDetail dl) const |
| std::string | getSignalString () const |
| bool | getSVN (const SatID &sat, const gnsstk::CommonTime &when, std::string &svn) const |
| virtual CommonTime | getUserTime () const |
| NavData () | |
| Initialize internal data fields. More... | |
Additional Inherited Members | |
| Static Public Member Functions inherited from gnsstk::NavData | |
| static gnsstk::SatMetaDataStore * | getSatMetaDataStore () |
| Accessor for python. More... | |
| static void | setSatMetaDataStore (gnsstk::SatMetaDataStore *smds) |
| Accessor for python. More... | |
| Public Attributes inherited from gnsstk::StdNavTimeOffset | |
| double | a0 |
| Bias coefficient of source time scale. More... | |
| double | a1 |
| Drift coefficient of source time scale. More... | |
| double | a2 |
| Drift rate coefficient of source time scale. More... | |
| double | deltatLS |
| Current or past leap second count (UTC only). More... | |
| double | deltatLSF |
| Current or future leap second count (UTC only). More... | |
| unsigned | dn |
| Leap second reference day number (UTC only). More... | |
| unsigned | dnSun |
| dn value for Sunday. More... | |
| CommonTime | effTime |
| Effectivity time (wnLSF,dn). More... | |
| CommonTime | refTime |
| Reference time for computation. More... | |
| TimeSystem | src |
| Source time system. More... | |
| TimeSystem | tgt |
| Target time system. More... | |
| double | tot |
| Time data reference time of week (storage only). More... | |
| unsigned | wnLSF |
| Leap second reference week number (UTC only). More... | |
| unsigned | wnot |
| Time data reference week number (storage only). More... | |
| Public Attributes inherited from gnsstk::NavData | |
| NavMessageID | signal |
| Source signal identification for this navigation message data. More... | |
| CommonTime | timeStamp |
| std::string | weekFmt |
| Static Public Attributes inherited from gnsstk::NavData | |
| static const GNSSTK_EXPORT std::string | dumpTimeFmt |
| Time format used for the dump method (Full). More... | |
| static const GNSSTK_EXPORT std::string | dumpTimeFmtBrief |
| Time format used for the dump method (Brief). More... | |
| static GNSSTK_EXPORT gnsstk::SatMetaDataStore * | satMetaDataStore = nullptr |
| Set this to a valid store to get PRN->SVN translations in dump(). More... | |
| Protected Attributes inherited from gnsstk::NavData | |
| double | msgLenSec |
Constructor & Destructor Documentation
◆ BDSD2NavTimeOffset()
| gnsstk::BDSD2NavTimeOffset::BDSD2NavTimeOffset | ( | ) |
Initialize all data to 0.
Definition at line 49 of file BDSD2NavTimeOffset.cpp.
Member Function Documentation
◆ clone()
|
inlineoverridevirtual |
Create a deep copy of this object.
Implements gnsstk::NavData.
Definition at line 73 of file BDSD2NavTimeOffset.hpp.
◆ effEnd()
|
inlinevirtual |
Return the number of seconds after the effectivity time (5/4 of a day) during which the standard delta t formula is used.
Reimplemented from gnsstk::StdNavTimeOffset.
Definition at line 84 of file BDSD2NavTimeOffset.hpp.
◆ effStart()
|
inlinevirtual |
Return the number of seconds prior to the effectivity time (2/3 of a day) during which the standard delta t formula is used.
Reimplemented from gnsstk::StdNavTimeOffset.
Definition at line 79 of file BDSD2NavTimeOffset.hpp.
◆ validate()
|
overridevirtual |
Checks the contents of this message against known validity rules as defined in the appropriate ICD.
- Returns
- true if this message is valid according to ICD criteria.
Implements gnsstk::NavData.
Definition at line 59 of file BDSD2NavTimeOffset.cpp.
The documentation for this class was generated from the following files: