CCSD3ZF0000100000001NJPL3IF0PDS200000001 = SFDU_LABEL RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 196 FILE_RECORDS = 4581 TARGET_NAME = MARS ^TABLE = "MDIMGEOM.TAB" OBJECT = TABLE NAME = "MDIM GEOMETRIC SPICE KERNELS" INTERCHANGE_FORMAT = ASCII ROWS = 4581 COLUMNS = 16 ROW_BYTES = 196 DESCRIPTION = "This table contains information describing the primary viewing geometry elements of the Viking EDR frames that make up the Mars MDIM. They were derived photogrammetrically as a by-product of DTM compilation, and supercede data originally provided by the Mission Test and Imaging System (MTIS) during active flight operations. All geometry elements are in the EME1950 coordinate system, the coordinate system originally used by the Viking Project. The primary geometry consists of four vectors: Camera-Angles (declination, right-ascension, twist), Planet-Angles (declination, right-ascension, and spin), Spacecraft Vector, and Sun Vector. Each row in the table contains the geometry of a single Viking EDR frame. Each record consists of 196 bytes, with a carriage return/line feed sequence in bytes 195 and 196. All fields (columns) are separated by commas, and character and time fields are enclosed in double quotation marks. This format allows the table to be treated as a fixed-length record file on hosts that support this file type and as a normal text file on other hosts." OBJECT = COLUMN NAME = IMAGE_ID DATA_TYPE = CHARACTER START_BYTE = 2 BYTES = 6 FORMAT = "A6" UNIT = "N/A" DESCRIPTION = "The image identifier is a six-character string to identify a Viking Orbiter image. The first three characters represent the orbit number. The fourth character is either an A for Viking Orbiter 1, a B for Viking Orbiter 2, or an S for the Viking Orbiter 1 Survey Mission. The letters C and D is used for images acquired by Viking Orbiter 1 and 2, respectively, before orbit insertion. The letter X is used for Viking Orbiter 1 images when more than 100 images were taken in one orbit. The last two characters represent the sequence number of the image within that orbit." END_OBJECT = COLUMN OBJECT = COLUMN NAME = IMAGE_NUMBER DATA_TYPE = INTEGER START_BYTE = 10 BYTES = 10 FORMAT = "I10" DESCRIPTION = "The image number is a value derived from the spacecraft clock start count. It is also known as the FSC (frame start count), and is a commonly used identifier for a Viking Orbiter image." END_OBJECT = COLUMN OBJECT = COLUMN NAME = INSTRUMENT_DECLINATION DATA_TYPE = REAL START_BYTE = 21 BYTES = 12 FORMAT = "F12.5" DESCRIPTION = "Camera angle- declination (degrees), EME1950" END_OBJECT = COLUMN OBJECT = COLUMN NAME = INSTRUMENT_RIGHT_ASCENSION DATA_TYPE = REAL START_BYTE = 34 BYTES = 11 FORMAT = "F11.5" DESCRIPTION = "Camera angle- right ascension (degrees) EME1950" END_OBJECT = COLUMN OBJECT = COLUMN NAME = INSTRUMENT_TWIST DATA_TYPE = REAL START_BYTE = 46 BYTES = 11 FORMAT = "F11.5" DESCRIPTION = "Camera angle- twist (degrees), EME1950" END_OBJECT = COLUMN OBJECT = COLUMN NAME = SPACECRAFT_TO_TARGET_X DATA_TYPE = REAL START_BYTE = 58 BYTES = 8 FORMAT = "F8.0" DESCRIPTION = "X-component of the spacecraft vector in kilometers, EME1950. The spacecraft vector gives the distance from the spacecraft to the planet center." END_OBJECT = COLUMN OBJECT = COLUMN NAME = SPACECRAFT_TO_TARGET_Y DATA_TYPE = REAL START_BYTE = 67 BYTES = 8 FORMAT = "F8.0" DESCRIPTION = "Y-component of the spacecraft vector in kilometers, EME1950. The spacecraft vector gives the distance from the spacecraft to the planet center." END_OBJECT = COLUMN OBJECT = COLUMN NAME = SPACECRAFT_TO_TARGET_Z DATA_TYPE = REAL START_BYTE = 76 BYTES = 8 FORMAT = "F8.0" DESCRIPTION = "Z-component of the spacecraft vector in kilometers, EME1950. The spacecraft vector gives the distance from the spacecraft to the planet center." END_OBJECT = COLUMN OBJECT = COLUMN NAME = TARGET_DECLINATION DATA_TYPE = REAL START_BYTE = 85 BYTES = 9 FORMAT = "F9.3" DESCRIPTION = "Planet angles - declination (degrees), EME1950" END_OBJECT = COLUMN OBJECT = COLUMN NAME = TARGET_RIGHT_ASCENSION DATA_TYPE = REAL START_BYTE = 95 BYTES = 9 FORMAT = "F9.3" DESCRIPTION = "Planet angles - right ascension (degrees), EME1950" END_OBJECT = COLUMN OBJECT = COLUMN NAME = TARGET_SPIN DATA_TYPE = REAL START_BYTE = 105 BYTES = 9 FORMAT = "F9.3" DESCRIPTION = "Planet angles - spin (degrees), EME1950" END_OBJECT = COLUMN OBJECT = COLUMN NAME = SUN_TO_TARGET_X DATA_TYPE = REAL START_BYTE = 115 BYTES = 12 FORMAT = "F12.0" DESCRIPTION = "X-component of the sun vector in kilometers, EME1950. The sun vector gives the distance from the sun to the planet center." END_OBJECT = COLUMN OBJECT = COLUMN NAME = SUN_TO_TARGET_Y DATA_TYPE = REAL START_BYTE = 128 BYTES = 12 FORMAT = "F12.0" DESCRIPTION = "Y-component of the sun vector in kilometers, EME1950. The sun vector gives the distance from the sun to the planet center." END_OBJECT = COLUMN OBJECT = COLUMN NAME = SUN_TO_TARGET_Z DATA_TYPE = REAL START_BYTE = 141 BYTES = 12 FORMAT = "F12.0" DESCRIPTION = "Z-component of the sun vector in kilometers, EME1950. The sun vector gives the distance from the sun to the planet center." END_OBJECT = COLUMN OBJECT = COLUMN NAME = JULIAN_DAY DATA_TYPE = REAL START_BYTE = 154 BYTES = 15 FORMAT = "F15.6" DESCRIPTION = "Julian day when the image was acquired. The Julian time was derived directly from the IMAGE_TIME value and is provided as a convenience to those groups that use the Julian day in their software systems." END_OBJECT = COLUMN OBJECT = COLUMN NAME = IMAGE_TIME DATA_TYPE = TIME START_BYTE = 171 BYTES = 23 FORMAT = "A23" DESCRIPTION = "The time when the image was acquired, in the format yyyy-mm-ddThh:mm:ss.ssZ. 'yyyy' = year, 'mm' = month, 'dd' = day of month, 'hh' = hour, 'mm' = minute, 'ss.ss' = seconds. The time system is Universal Time (UTC)." END_OBJECT = COLUMN END_OBJECT = TABLE END