01245nas a2200181   4500000000100000000000100001008004100002653001800043653001400061653001500075653003100090653003100121100001800152245010800170300001000278490000600288520076900294       1999                            d10aCOTS software10asatellite10asimulation10aspace surveillance network10aspace-based communications1 aPaul Graziani00aCommercial-Off-The-Shelf Software Becomes Mission-Critical to Success and Cost-Effective Space Missions  a43-550 v33 a<p>Many organizations can no longer afford to develop mission-specific software in-house. Commercial satellite software that can be used for multiple missions is playing a growing, cost-saving role in enabling not only successful but economical space activities. Commercial off-the-shelf (COTS) software that is stable, accurate, and well-supported is key in all phases of a satellite's life—from pre-launch analyses to ground support through to graveyarding The paper shows the benefit of using COTS software in the big international projects, related to construction of reusable, generic software "building blocks" based on legacy software. In theory, new missions could then select among these building blocks to build systems in an object-oriented manner</p>