Atmospheric density, solar activity, and spacecraft/satellite characteristics: an integrated relationship for orbital lifetime prediction assessment

摘要

The ability to accurately predict a spacecraft/satellite orbital lifetime, insertion altiude, re-boost requirements, and mission performance is mainly the resutl of the integrated effect from knowledge of the atmospheric density, solar activity, and timeline of vehicle characteristics. Each of these elements is dependent upon a model developed to provide the inputs necessary for the use of an orbital lifetime prediction program. This paper will address relative influences of these elements with emphasis on solar activity, atmospheric density, and drag coefficient associated with the model products used to predict orbital lifetime and related spacecraft/satellite design and operational conditions. Issues associated with the potential for improvement of the lifetime prediction model input elements will be discussed with regard to their relative contributions to improving orbital lifetime and performance predictions.