Apollo Command Module Ephemeris

Recovered Apollo 15, 16, 17 Command Module ephemeris is now posted on the Apollo Scan Project webpage.

The Apollo Command Module ephemeris were originally recorded to paper, and then later transferred to microfilm. The National Space Science Data Center (NSSDC) scanned the microfilm records containing the state vector data and these files were received by Arizona State University (ASU). An in-house custom Optical Character Recognition (OCR) algorithm converted the raster images of the microfilm scans to text format. Manual methods were implemented to read and record values that failed OCR conversion. The final values of the OCR conversion, manual efforts, and subsequent validation are stored in spreadsheets and converted to the NASA SPICE kernel format. Please note that the newly posted data are "first-run" files, and new improved versions will likely be uploaded in the future.