It is used during daylight hours. The balloon is filled to such degree that its ascent rate is known. By measuring the time period between the start of the balloon and the moment it hides in the cloud can be determined the height of the cloud base.
imbrication lines (imâ³bro brÃ´Â´ika shÉn) , lÄ«nz.n pl. 1 the seams which are formed by overlapping layers of tissue in order to close a surgical. wound. 2 slight mesiodistal ridges in the cervical third of a. tooth
This was theorized to be due to bifurcation of. the reï¬ected shock wave associated with shock-wave boundary layer interaction. Previous researchers have observed shock wave bifurcation in experiments per-. taining to shock tube performance [5, 6, 7, 8, 9]. Shock bifurcation is the splitting of. a reï¬ected shock near the wall into an oblique and a normal wave due to interaction. with the ï¬uid in the boundary layer created by the incident shock. This results in a. foot extending from the wall to the primary reï¬ected shock as sketched in Fig.