Cdma - Leica GR30 Online Help Manual

Appendix J: Glossary
BINary EXchange format: binary exchange representation of GPS data and metadata which allows for encapsulation all or most of the
information currently exchanged with the ASCII formats of RINEX, SINEX, IONEX, SP3, and so on as various BINEX records are
defined.

CDMA

CDMA is a telecommunication standard for transmitting data packages using the Internet protocol.
CMR/CRM+
CMR and CMR+ send out reference station coordinates of the antenna phase center, not the ARP. Additionally, the distance from the
marker to the antenna phase center is transmitted. The reference station antenna type is not transferred (i.e. not known to rover). The
rover can therefore not reduce the antenna coordinate to the ARP. The reference station height seen on the rover will therefore not be
the height reading as entered on the reference station but the entered antenna height reading plus the vertical antenna phase center
offset.
Cut-off angle
The minimum elevation angle below which no more GPS satellites are tracked by the receiver.
Cycle slip
A discontinuity in GPS carrier-phase observations, usually of an integer number of cycles, caused by temporary signal loss. If a GPS
receiver loses a signal temporarily, due to obstructions for example, when the signal is reacquired there may be a jump in the integer
part of the carrier-phase measurement due to the receiver incorrectly predicting the elapsed number of cycles between signal loss and
reacquisition.
Dilution of Precision (DOP)
An indicator of satellite geometry for a unique constellation of satellites used to determine a position. Positions tagged with a higher
DOP value generally constitute poorer measurement results than those tagged with lower DOP.
Dynamic Host Configuration Protocol (DHCP)
A network application protocol used by devices (DHCP clients) to obtain configuration information for operation in an Internet Protocol
network. This protocol reduces system administration workload, allowing devices to be added to the network with little or no manual
intervention.
DynDNS
It is a dynamic DNS service, which allows users to have a subdomain that points to a computer with regularly changing IP addresses,
such as those served by many consumer-level Internet ser-vice providers. An update client installed on the user's computer, or built into
a networked device such as a router or webcam, keeps the hostname up to date with its current IP address.
See for details: http://en.wikipedia.org/wiki/Dyndns
Ephemeris
A description of the path of a celestial body indexed by time (from the Latin word, ephemeris, meaning diary). 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.
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