ISRO successfully completed test-firing of the Low Altitude Escape Motor (LEM) of crew escape system from Sriharikota spaceport, the space agency said on Wednesday. Meanwhile, a virtual space museum ‘SPARK’ was launched by ISRO Chairman S Somanath on Wednesday for public use. ISRO successfully completed test-firing of the Low Altitude Escape Motor (LEM) of crew escape system from Sriharikota spaceport, the space agency said on Wednesday. Meanwhile, a virtual space museum ‘SPARK’ was launched by ISRO Chairman S Somanath on Wednesday for public use.