Atmospheric density variations as observed from three series of concentrated meteorological rocket soundings are described. Arcasonde, Datasonde, and inflatable falling sphere sensors were used to determine the density structure. Data reduction methods are discussed for bead thermistor instruments (Arcasonde and Datasonde) and inflatable falling spheres. Error sources of both systems are discussed. The best estimate of the standard deviation of the density noise for the Arcasonde and Datasonde instruments was found to be approximately 1.08 percent.