where dV/dt is the meteor deceleration, V the velocity, patm is the atmospheric density and T is the drag coefficient assumed to be 1 for the remainder of this paper. In this scenario the BP is based only on observed velocity and deceleration while the atmospheric density is based on the MSIS-E-90 model atmosphere. As it has been discussed in Janches et al. , the micrometeor deceleration observed at AO appears to be linear, at least during the time they are observed by the radar. Furthermore, if we assume the meteoroids to have a spherical shape and a canonical mass density equal to 3 gm/cc then the particle masses can be derived. This approach permits the direct determination of meteoric mass flux in the upper atmosphere utilizing ground based techniques.
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