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TECHNICAL TERMINOLOGY

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Technical terminology

GMT
(Greenwich Mean Time)
Central European Time standard
Standard time at 0 degree longitude (the
longitude intersecting Greenwich, Great
Britain). This time is used worldwide for
synchronization of data collection.

Bluetooth® wireless technology
Technology for wireless data transmis-
sion at short range up to 10 metres.

GPS
(Global Positioning System)
GPS determines your actual geographi-
cal position by the use of satellites. It is
based on a total of 24 satellites which or-
bit the Earth and transmit signals. The
GPS receiver receives these signals and
calculates the distance to each satellite
from the running time differences and
thus evaluates its actual current position
in terms of geographical length and
width. In order to determine the position,
signals from at least three satellites are
required, and the fourth one allows the
height to be determined.

JPG/JPEG
(Joint Photographic Experts Group)
The JPEG is the most common type of
storage format for dissipating picture
compression, i.e. when compressing,
details of the picture are lost. Still pro-
vides good picture quality despite com-
pression, compression stages are se-
lectable. It is the most common format
for representation and exchange of pic-
tures on the internet. 

SD card
(Secure Digital)
The Secure Digital Card was developed
in  2001  by  SanDisk  on  the  basis  of  the
older MMC standard. An SD card is a re-
writable change-over storage card.