NSSDCA ID: PSPG-00043
Availability: At NSSDC, Ready for Offline Distribution (or Staging if Digital)
Time span: 1969-07-21 to 1969-08-11
The Apollo 11 Passive Seismograph Experiment (PSE) data are contained on 2 reels of 35-mm microfilm. The microfilm records were made from hard-copy seismograms obtained at Lamont-Doherty Geological Observatory and from the EASEP-PSE analog tapes received by NSSDC from NASA-MSC. Each seismogram contains approximately 6 hr of data. The seismograms are numbered in chronological order, with the first lunar day numbers from 1 to 52 and the second lunar day numbered from 53 to 78. The original seismograms are 90 cm wide and approximately 25 cm in height. On the microfilm, minute marks appear approximately 12 cm apart, i.e., 1 hr of data is contained in 8 lines. The calibration of the records was determined by using the width of the seismograms as an exact scale and a full scale amplitude deviation of + or - 3 cm = + or - 512 digital units at x 1 recorder magnification. Changes in recorder magnification are marked at the top of each seismogram. Accompanying documentation indicates changes in short period seismometer gain, and the seismometer magnification curve in a digital units per cm of ground displacement. Time on the records is shown in GMT. Occasional data dropouts visible on the seismograms were present on the original digital tapes. There has been no filtering performed on these data.
Questions and comments about this data collection can be directed to: Coordinated Request and User Support Office
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