OBJECT = COLUMN NAME = CLOCK_TIMESTAMP COLUMN_NUMBER = 1 BYTES = 20 DATA_TYPE = ASCII_REAL FORMAT = "F20.7" START_BYTE = 1 DESCRIPTION = "A derived value for the time tag in seconds associated with the field values in the same row. The derived value is created by the following formula: CLOCK_TIMESTAMP = UNIX_SEC + UNIX_USEC/1000000.0 " END_OBJECT = COLUMN OBJECT = COLUMN NAME = UNIX_SEC COLUMN_NUMBER = 2 BYTES = 12 DATA_TYPE = ASCII_INTEGER START_BYTE = 22 DESCRIPTION = "Timestamp in seconds assigned to the field values in the same row. Defined as the number of seconds that have elapsed since 1970-01-01T00:00:00 UTC." END_OBJECT = COLUMN OBJECT = COLUMN NAME = UNIX_USEC COLUMN_NUMBER = 3 BYTES = 12 DATA_TYPE = ASCII_INTEGER START_BYTE = 35 DESCRIPTION = "The timestamp in microseconds assigned to the field values in the same row. Defined as the number of microseconds after UNIX_SEC." END_OBJECT = COLUMN OBJECT = COLUMN NAME = JULIAN_DATE COLUMN_NUMBER = 4 BYTES = 13 DATA_TYPE = ASCII_REAL FORMAT = "F13.7" START_BYTE = 48 DESCRIPTION = "Julian date of the most recent midnight in Greenwich." END_OBJECT = COLUMN OBJECT = COLUMN NAME = LONGITUDE COLUMN_NUMBER = 5 BYTES = 12 DATA_TYPE = ASCII_REAL FORMAT = "F12.7" START_BYTE = 62 DESCRIPTION = "Longitude of the gondola in radians. Does not vary during ground testing and is set to 0.00 during ground calibration of just the IR camera." END_OBJECT = COLUMN OBJECT = COLUMN NAME = LATITUDE COLUMN_NUMBER = 6 BYTES = 12 DATA_TYPE = ASCII_REAL FORMAT = "F12.7" START_BYTE = 75 DESCRIPTION = "Latitude of the gondola in radians. Does not vary during ground testing and is set to 0.00 during ground calibration of just the IR camera." END_OBJECT = COLUMN OBJECT = COLUMN NAME = RIGHT_ASCENSION COLUMN_NUMBER = 7 BYTES = 12 DATA_TYPE = ASCII_REAL FORMAT = "F12.7" START_BYTE = 88 DESCRIPTION = "Commanded right ascension of the telescope boresight in radians." END_OBJECT = COLUMN OBJECT = COLUMN NAME = DECLINATION COLUMN_NUMBER = 8 BYTES = 12 DATA_TYPE = ASCII_REAL FORMAT = "F12.7" START_BYTE = 101 DESCRIPTION = "Commanded declination of the telescope boresight in radians." END_OBJECT = COLUMN OBJECT = COLUMN NAME = SHIFT_UP COLUMN_NUMBER = 9 BYTES = 12 DATA_TYPE = ASCII_REAL FORMAT = "F12.7" START_BYTE = 114 DESCRIPTION = "Arcseconds of up or down deviation from commanded right ascension and declination. A positive value is a shift up, or increase in the telescope elevation angle while a negative value is a shift down, or decrease in the telescope elevation angle." END_OBJECT = COLUMN OBJECT = COLUMN NAME = SHIFT_RIGHT COLUMN_NUMBER = 10 BYTES = 12 DATA_TYPE = ASCII_REAL FORMAT = "F12.7" START_BYTE = 127 DESCRIPTION = "Arcseconds of right and left deviation from commanded right ascension and declination. A positive value is a shift up, or increase in the telescope azimuth angle while a negative value is a shift down, or decrease in the telescope elevation angle." END_OBJECT = COLUMN OBJECT = COLUMN NAME = STARFIX COLUMN_NUMBER = 11 BYTES = 2 DATA_TYPE = ASCII_INTEGER START_BYTE = 140 DESCRIPTION = "Star camera fix number, used as a reference and indicator of the accuracy of the SHIFT_UP, SHIFT_RIGHT measurements. In flight it is set to 00 during periods where the telescope position is not known with a high accuracy. E.g. before the first star camera reference is conducted. It increments by 1 for each successive fix of the star camera. A periodic star fix is used to update the knowledge of the telescope position, given a gyroscope drift rate in the telescope position of about 1.8 arseconds per minute. Comparing the CLOCK_TIMESTAMP with the last increment in the STARFIX value gives an idea of the amount of uncertainty in the reported SHIFT_UP, SHIFT_RIGHT values. It is set to 00 during ground testing due to the constrained field of view of the telescope when pointing out of the balloon assembly hanger, which prevented acquiring a star camera fix. However, during ground testing a star camera fix was unnecessary for the pointing observations being conducted. " END_OBJECT = COLUMN