No manual is available yet for this tool. The major components of it though are all derived from actual Skylab and Shuttle calculations, so temporarily, before a manual is added, here the links to the documents with the details:
- Launch Window Processor: https://web.archive.org/web/20100520004146/http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19800070628_1980070628.pdf starting on PDF page 446
- Orbital Maneuver Processor: https://www.ibiblio.org/apollo/Shuttle/MCC/FDO%20Console%20Handbook%20-%20On-orbit.pdf starting on PDF page 543
- Skylab LWP: https://www.ibiblio.org/apollo/Documents/70-FM-198.pdf