Does it mean "scratching/scraping the satellite with missiles"(instead of hitting the exact potition)?
Or "Grazing" in this sentence has other meaning?
That's it. Grazing means did just enough damage to leave evidence. Like when someone shoots someone with a gun, but it only scratches them on the cheek. Or to use Noob's example, a hurricane goes by, but other than a few broken branches and knocked over trash cans, no other signs a hurricane was there.
I may be wrong, but i was always under the assumption that rockets ,and shuttles, could only make it through the atmosphere (safely) in certain areas. It is sometimes months before another "window" opens. I believe that it has to do with atmospheric conditions.
That's for manned flights and launching and recovery of extremely expensive objects , where they wait for the calmest atmospheric conditions possible. The context of this message is forced re-entry of an obsolete satellite by shooting it out of the sky before its orbit decays enough for a natural re-entry. In this case, safety of the satellite is not what matters, it's the safety of the people below.