Several current and planned Air Force meteorological measurement systems are described, with emphasis on equipments and techniques of special relevance to aerospace problems. Key periods in the flight history of a typical large rocket vehicle are discussed in terms of meteorological constraints and the root mean square accuracies to which the parameters of interest can be measured. The relative costs and special requirements of the various measurements are given. Plans to upgrade the performance and accuracy of present systems are outlined and approaches to challenging new problems, particularly those associated with the mesophere, are indicated. * All battery-powered (BP) chart drives employ a small flashlight battery with a normal operating life of six months. * All spring-wound (SW) chart drives employ a heavy duty spring requiring winding once every 31 days.