Atmospheric Opacity
    Viking 1 July 26, 1976 Ls 99.4 MY 12 to Nov 23, 1978 Ls 180.4 MY 13
    Viking 2 Sept 10, 1976 Ls 120.5 MY 12 to Feb 22, 1979 Ls 235.3 MY 13






























    This plot shows point-by-point Atmospheric Opacity measurements obtained by the Viking Landers during Mission Years 1 and 2, spanning sols 6-920 at VL1 and 6-872 at VL2.

    Useful Mission Documents

    The Data
    Viking Lander camera images of the Sun at 0.67 μm were used to compute total normal atmospheric optical depth at the two landing sites over a period of about 900 Mars days.

    Atmospheric opacity derived from Viking camera dun diode images of the solar disk, for sols 6-920 is located in dataset VL-1001 VL1/VL2-M-LCS-5-ATMOS-OPTICAL-DEPTH-v1.0 This dataset contains 1044 measurements of optical depth and associated error estimates.

    Retrieving the Data

    Go to Volume vl_1001 Data
    Viking 1 and 2 data file and label are identified as vl_opac

    Citing datasets for Publication

    Colburn, D.S., VL1/VL2-M-LCS-5-ATMOS-OPTICAL-DEPTH-V1.0, NASA Planetary Data System, 1989.