L The Mariner 6 and 7 Infrared Spectrometer (IRS) instrument has a 10**11MDall-Kirkham telescope with a pair of circular variable filter spectrometers.NThe first channel has a range of 4.0 to 14.3 microns, while the second channelHhas a range of 1.9 to 6.0 microns. Wavelength resolution is .5 to 1.07.IThe arrival date of closest approach for the instrument was July 31, 1969/for Mariner 6 and August 5, 1969 for Mariner 7.4 Principle Investigator: Dr. Gerge C. Pimentel,6 Department of Chemistry,7 University of California,: Berkeley, California 94720.IA Mariner 6 and 7 IRS data record has 30 ancillary items, followed by 740Bspectral points. The overall record length is 896 real * 4 words.JThe IRS data has been divided into seven files to meet the requirements ofLSPECIO SFS data. Records 1-22 have been placed in MAR7C.DAT. Records 23-36Nhave been placed in MAR6C.DAT. Records 37-158 have been placed in MAR6_2.DAT.JRecords 159-323 have been placed in MAR7_2.DAT. Records 324-512 have beenLplaced in MAR7_1.DAT. A DDF has been created for each of these five Mariner6 and 7 data files.MThe IRS data has unique wave specifications (starting wave and wave incrementGfor each spectra segment) for each spectrum. Because a requirement forDSPECIO SFS data is that all spectra in a data set have the same waveHspecifications, the average of the starting waves and the average of theHwave increments are used for the wave specifications in the DDF for eachof the seven cases.