PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 36 FILE_RECORDS = 29 ^TABLE = "OPTICS.TAB" OBJECT = TABLE INTERCHANGE_FORMAT = ASCII ROWS = 29 ROW_BYTES = 36 COLUMNS = 5 DESCRIPTION = "This table contains data on the transmittance and reflectance of optical components within the Viking Lander cameras. The data are taken from Huck et al., Radiometric Performance of the Viking Mars Lander Cameras, NASA TM X-72692, 1975. The values for the transmittance of the contamination cover and window are the same, but are listed as two separate columns. Differences between the four flight cameras are negligible. Thus, these data can be used for all the Viking Lander cameras." OBJECT = COLUMN NAME = WAVELENGTH DATA_TYPE = ASCII_REAL START_BYTE = 1 BYTES = 6 FORMAT = "F6.3" UNIT = MICROMETERS DESCRIPTION = "The center wavelength of the interval over which the data were sampled. Data in this file were sampled every 0.025 micrometers between 0.4 and 1.1 micrometers." END_OBJECT = COLUMN OBJECT = COLUMN NAME = CONTAMINATION_COVER_TRANSMITTANCE DATA_TYPE = ASCII_REAL START_BYTE = 8 BYTES = 6 FORMAT = "F6.3" DESCRIPTION = "The transmittance of the contamination cover window. The contamination cover was capable of being moved out of the optical path if it became coated with dust. The cover was, in fact, deployed for camera 1 on Lander 1 and camera 2 on Lander 2 during the extended mission. The cover remained in place for the entire mission on the other 2 cameras." END_OBJECT = COLUMN OBJECT = COLUMN NAME = WINDOW_TRANSMITTANCE DATA_TYPE = ASCII_REAL START_BYTE = 15 BYTES = 6 FORMAT = "F6.3" DESCRIPTION = "The transmittance of the window that protected the interior of the camera from outside elements." END_OBJECT = COLUMN OBJECT = COLUMN NAME = MIRROR_REFLECTANCE DATA_TYPE = ASCII_REAL START_BYTE = 22 BYTES = 6 FORMAT = "F6.3" DESCRIPTION = "The reflectance of the mirror in the camera." END_OBJECT = COLUMN OBJECT = COLUMN NAME = LENS_TRANSMITTANCE DATA_TYPE = ASCII_REAL START_BYTE = 29 BYTES = 6 FORMAT = "F6.3" DESCRIPTION = "The transmittance of the lens over the photosensor array." END_OBJECT = COLUMN END_OBJECT = TABLE END