Current sensors such as microphones can capture sound waves, convert them to electronic form so the sounds can be stored, edited, or transmitted to other locations (i.e. music distribution or cell phone speech transmission). But the microphone doesn’t necessarily know where it is, or what time the sound was recorded. However, in modern mobile phones or cameras this information is automatically included in the picture file (in a form of Meta data called EXIF) which can store both the time and location of your photo, giving rise to geo-tagging applications, so your pictures will automatically be placed the appropriate place on Google Earth. However, the clock settings of the mobile phone or camera may be very inaccurate because, it not necessarily set properly, and the information may be wrong due to choice of time zone or summer/winter time settings.
The next generation of sensors will push accuracy to a new level. Any sensor in the world will be synchronized with any other sensor with an incredible accuracy of 1 ten millionth of a second, i.e. 100 ns. In the next blog entry, you will see some of the exciting perspectives this can create, some are mindblowing!