Ross SRG-4400, User Manual

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1–6 • Introduction SRG-4400 User Manual (Iss. 06)
Documentation Terms and Conventions
The following terms and conventions are used throughout this manual.
Terms
The following terms are used:
• “ Almanac ” refers to a set of parameters included in the GPS satellite navigation message
that a receiver uses to predict the approximate location of a satellite. The almanac
contains information about all of the satellites in the constellation.
• “ CW signals ” refers to continuous wave signals.
• “ Ephemeris ” is a description of the path of a celestial body indexed by time. The
navigation message from each GPS satellite includes a predicted ephemeris for the orbit
of that satellite valid for the current hour. The ephemeris is repeated every 30 seconds and
is in the form of a set of 16 Keplerian-like parameters with corrections that account for
the perturbations to the orbit caused by the earth’s gravitational field and other forces.
• “ Epoch ” is an instant of time (or a date) from which values of data are referenced. Note:
an Era is the period of time between successive epochs.
• “ GLONASS ” refers to the Global Navigation Satellite System.
• “ GPS ” refers to global positioning system.
• “ Operator ” and “ User ” refer to the person who uses SRG-4400.
• “ RF interference ” refers to radio frequency interference
• “ System ” and “ Video system ” refer to the mix of interconnected production and terminal
equipment in your environment.
• “ UTC ” refers to Co-ordinated Universal Time. The time scale based on the atomic
second but occasionally corrected, by the insertion of leap seconds, to keep it
approximately synchronized with Earth’s rotation. The leap second adjustments keep
UTC within 0.9 seconds UTI1.
Conventions
The following conventions are used:
• The “ Operating Tips ” and “ Note ” boxes are used throughout this manual to provide
additional user information.