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Far-Ultraviolet Spectrometer Data Graphs (Digitized)


Availability: At NSSDC, Ready for Offline Distribution (or Staging if Digital)

Time span: 1972-12-10 to 1972-12-19


This collection contains digitized graphs of some of the spectral data acquired by the Far-Ultraviolet Spectrometer. The spectral data are not in temporal order. They are displayed in two forms: averages of the spectra; and, time variations in the intensities observed at wavelengths of 1216, 1275, 1304, 1470, 1556, and 1657 Angstroms (121.6, 127.5, 130.4, 147.0, 155.6, and 165.7 nanometers). The frames showing spectra are labeled identifying the five spectra used in the display and the actual elapsed time in hours, minutes, and seconds of the first spectra. The ordinate shows average counts per bin, and the abscissa displays bin number (wavelength interval). The counts shown are the average over five spectra. The average counts/bin value can be converted to brightness in rayleighs. The time-variation plots show the brightness in rayleighs (ordinate) as a function of actual elapsed time expressed in decimal hours. Each framed here covers one hour of data, and has the wavelength of the measurement printed. The accompanying aspect data contains values for several parameters including right ascension and declination of the Far-UV Spectrometer (UVS) optic axis, distance to the Earth, the angle between the UVS optic axis and the Sun, the angle between the UVS optic axis and Earth, and the angle between the UVS optic axis and the Moon.

For this digitization effort the NSSDCA scanned the source microfilm (PSPA-00203, a 16-mm film supplied by the experimenter that contains graphical displays of some of the spectral data contained in the tape collection PSPA-00070) at a resolution of 400 dots per inch into TIFF files and output one TIFF image file for each frame on the film. The NSSDCA also combined groups of these TIFF files into multipage PDF files to facilitate browsing. Both formats are included in this collection.

Also available from the NSSDCA is full set of Apollo 17 Far-UV Spectrometer data from magnetic tape (PSPA-00070).

For more detailed information, see:


  • Planetary Science: Atmospheres

Additional Information



Questions and comments about this data collection can be directed to: Dr. David R. Williams



NameRoleOriginal AffiliationE-mail
Dr. Paul D. FeldmanData ProviderJohns Hopkins
Dr. Paul D. FeldmanGeneral ContactJohns Hopkins

Selected References

  • Williams, David, Apollo 17 Far-Ultraviolet Spectrometer Data Graphs: Microfilm Scans, NASA-GSFC, NSSDC, Unnumbered, Greenbelt, MD, Jan. 2021
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