Trimble Outdoors Part Number 45005-00-ENG, AcutimeTM2000 Synchronization Kit manual Sps

Glossary

SPS	Standard Positioning Service. Refers to the GPS as available
	to the authorized user.
start bit	In asynchronous transmission, the start bit is appended to
	the beginning of a character so that the bit sync and
	character sync can occur at the receiver equipment.
stop bit	In asynchronous transmission, the stop bit is appended to
	the end of each character. It sets the receiving hardware to a
	condition where it looks for the start bit of a new character.
SV	Space Vehicle (GPS satellite).
synchronous	A method of sending digital data in which the bits come at
communication	fixed, rather than random, times and are synchronized to a
	clock.
TSIP	Trimble Standard Interface Protocol. A binary/hex packet
	bi-directional protocol, also known as the TANS protocol.
	Used by a large number of Trimble sensors. TSIP is the
	subset of TANS which is recognized by all Trimble sensors
	except the 4000 series. The TSIP protocol is defined in full
	in Appendix A.
URA	Satellite user range accuracy. The URA is sent by the
	satellite and is computed by the GPS operators. It is a
	statistical indicator of the contribution of the apparent clock
	and ephemeris prediction accuracies to the ranging
	accuracies obtainable with a specific satellite based on
	historical data.
UTC	Universal Coordinated Time. Uniform atomic time system/
	standard that is maintained by the US Naval Observatory.
	UTC defines the local solar mean time at the Greenwich
	Meridian.
UTC offset	The difference between local time and UTC (Example: UTC
	- EST = 5 hours).

Glossary-12 Acutime 2000 Synchronization Kit User Guide