Trimble Outdoors SK8 - Manual (Page 207)

Lassen-SK8 Embedded GPS Module Glossary-9
Glossary
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 indicatory 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 Time Coordinated. 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).
2-D Two Dimensional. A 2-D position is defined as latitude and longitude.
Altitude is assumed to be fixed.