They emphased the data with a factor of 10.000 to get the differences through, so I'd guesstimate the weight in the ballpark of a gram (0,0022 pound nugget). A

They emphased the data with a factor of 10.000 to get the differences through, so I'd guesstimate the weight in the ballpark of a gram (0,0022 pound nugget). As for what it's good for, the article has a good example: "Now, with Goce, we can unify this so that we don't get the sort of surprises we had when they built the Channel Tunnel and discovered a half-metre offset between the UK and France."