... In order to get actual measurements of the fluctuating network flow rates between some astronomical Web sites, the CDS has developed a tool called AstroRoute. ... AstroRoute is a system to get measurements about the connectivity and the quality of the network between astronomical web sites. ... There exists a lot of network tools to test network quality, but the main problem is that the tests are generally done from one single site--the tester's own host machine. ... Figure 1: Bandwidth world map. ...