Global positioning system, Use of this document – NavCom NCT-2030M Rev.C User Manual

Page 8

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NCT-2030M User Guide - Rev. C

Global Positioning System

Selective availability

(

S/A

code) was disabled on 2

nd

May

2000 at 04:05

UTC

. The United States government has

stated that present

GPS

users do so at their own risk.

The US Government may at any time end or change
operation of these satellites without warning.

The U.S. Department of Commerce Limits
Requirements state that all exportable

GPS

products

contain performance limitations so that they cannot be
used to threaten the security of the United States.
Access to satellite measurements and navigation results
will be limited from display and recordable output
when predetermined values of velocity and

altitude

are

exceeded. These threshold values are far in excess of
the normal and expected operational parameters of the
NCT-2030M

GPS

Sensor.

Use of this Document

This User Guide is intended to be used by someone
familiar with the concepts of

GPS

and satellite surveying

equipment.

‡

Note indicates additional information to make better
use of the product.

a

Indicates a caution, care, and/or safety situation.

0

Warning indicates potentially harmful situations.

Items that have been

ITALICIZED

indicate a term or

acronym that can be found in the Glossary.

vi

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