| HGT I is a device for the
generation of exact time data as timebase for delay measurements.
Initially, HGT I is calibrated in stand-alone operation
outside a building. During calibration the GPS clock within
the device is synchronized with the UTC time of the GPS
system. |
Upon completion of the synchronization
phase
HGT I can be used inside buildings without requiring further
GPS signal reception, because the internal clock now generates
clock pulses (1 per second) with a maximum deviation of +-1
ms during 8, 24 or 72 hours. |
| By means of these clock pulses
two HGT I devices can be used simultaneously to conduct highly
precise delay measurement between any two global locations. |
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Front and rear view HGT I
Click here to enlarge |
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HGT I - Overview
