Human Rights Watch: Mapping the Sarin Flight Path
The UN inspectors investigating the chemical weapons attack on two suburbs in Damascus last month werent supposed to point the finger at the party responsible for the killings. But even so, the Sellstrom report revealed key details of the attack that strongly suggest the government is to blame, and may even help identify the location from which the Sarin-filled rockets that killed hundreds of people on August 21 were fired.
In appendix 5 of their report, after describing the size and structure of two rocket delivery systems used, they go one step further and actually reveal the direction some of the rockets likely came from. Using standard field investigative techniques examining the debris field and impact area where the rockets struck, the report provides precise azimuths, or angular measurements, that allow us to work out the actual trajectory of the rockets.
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The two attack locations are located 16 kilometers apart, but when mapping these trajectories, the presumed flight paths of the rockets converge on a well-known military base of the Republican Guard 104th Brigade, situated only a few kilometers north of downtown Damascus and within firing range of the neighborhoods attacked by chemical weapons.
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This isnt conclusive, given the limited data available to the UN team, but it is highly suggestive and another piece of the puzzle.
http://www.hrw.org/news/2013/09/17/dispatches-mapping-sarin-flight-path