GPS makes the job of 'synchronizing our watches' easy and reliable. Perhaps most useful, however, will the the relationship of the bee yard location with surrounding fields. It might be possible to determine best locations by seeing how far and in what direction vegetation resources for the bees are located. The state of the vegetation itself is also an issue. This can be visualized using a technology called remote sensing.
Global monitoring is possible from nearly any site on earth.
A detailed remote sensing tutorial is found at a NASA Web site. It shows a chart of various uses across six different disciplines. For agriculture these are, discrimination of vegetation types, measurement of crop acreage by species, determination of vegetation vigor and stress, and soil associations and type. In the future, therefore, it will not be too far fetched to see beekeepers using this technology to not only find plant resources, but also to determine the health, vigor, moisture content and other conditions that will determine their production potential. A virtual library of remote sensing contains many resources of help to those interested in this area, including on-line publications, journals, and conventions and meetings.