Wind models for the NSTS ascent trajectory biasing for wind load alleviationNew concepts are presented for aerospace vehicle ascent wind profile biasing. The purpose for wind biasing the ascent trajectory is to provide ascent wind loads relief and thus decrease the probability for launch delays due to wind loads exceeding critical limits. Wind biasing trajectories to the the profile of monthly mean winds have been widely used for this purpose. The wind profile models presented give additional alternatives for wind biased trajectories. They are derived from the properties of the bivariate normal probability function using the available wind statistical parameters for the launch site. The analytical expressions are presented to permit generalizations. Specific examples are given to illustrate the procedures. The wind profile models can be used to establish the ascent trajectory steering commands to guide the vehicle through the first stage. For the National Space Transportation System (NSTS) program these steering commands are called I-loads.
Document ID
19900032815
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Smith, O. E. (Computer Sciences Corp. Huntsville, AL, United States)
Adelfang, S. I. (Computer Sciences Corp. Huntsville, AL, United States)
Batts, G. W. (Computer Sciences Corp. Applied Technology Div., Huntsville, AL, United States)