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TM - Time and Date

Provides the current UTC time and date derived from GNSS service data.

Qualifiers​

  • Q: query (>QTM<)
  • R: response (>RTM...<)

Note: Current Antares parser accepts QTM as input and returns an RTM response frame.

Format​

Query:

>QTM<

Response:

>RTMAABBCCDDDEEFFGGGGHHIJJKLLLLL<

Fields​

FieldDescription
AAHour
BBMinutes
CCDDDSeconds in milliseconds
EEDay
FFMonth
GGGGYear
HHNot implemented
IFix mode
JJNumber of usable satellites
KNot implemented
LLLLLReserved

Fix mode (I)​

  • 0 = 2D GPS
  • 1 = 3D GPS
  • 2 = 2D DGPS
  • 3 = 3D DGPS
  • 9 = no fix available

Example​

>RTM1921030001711201000107000000<

Meaning:

  • Time: 19:21:03
  • Date: 17/11/2010

Antares Implementation Notes​

In Antares, TM is generated from current GNSS information:

  • Hour and minutes are derived from GNSS seconds-of-day.
  • CCDDD is emitted as seconds in milliseconds (SS000).
  • HH is currently returned as 00.
  • I is derived from the first digit of GNSS quality.
  • JJ is capped at 99 usable satellites.
  • K is currently returned as 0.
  • LLLLL is currently returned as 00000.
  • ST provides GNSS runtime diagnostics.
  • PV provides position and velocity information.