[time-nuts] V standards

[Hal Murray]

> Do you know of any laboratory scales that also require you to enter
> the date/time so they can also model the dynamic 0.1 ppm effect on
> gravity of lunar/solar tides? 

It's worse than that.

Geologists measure gravity to get the density of of the underlying rocks.  I 
saw a neat topo map of the San Francisco peninsula at one of the USGS open 
houses.  The contours were rock density rather than elevation.

Of course, they had to correct for elevation.  When I asked how they got the 
elevation, the guy smiled: "From the sewer people".

They had the instrument on display.  It wasn't very big, say a cubic foot.  
Maybe they will have it out at the next open house so I can look closer.



-- 
These are my opinions, not necessarily my employer's.  I hate spam.