PDS_VERSION_ID = PDS3 /*** FILE FORMAT ***/ RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 39 FILE_RECORDS = 12 /*** GENERAL DATA DESCRIPTION PARAMETERS ***/ MISSION_NAME = "MESSENGER" SPACECRAFT_NAME = "MESSENGER" INSTRUMENT_HOST_NAME = "MESSENGER" DATA_SET_ID = "MESS-E/V/H-MDIS-4-CDR-CALDATA-V1.0" PRODUCT_ID = "MDISNAC_BINNED_RESP_0" /*( MDIScam_bining_RESP_v )*/ /*( cam = camera, NAC or WAC )*/ /*( bining = binning, NOTBIN or BINNED )*/ /*( v = version number, 0-9,a-z )*/ PRODUCER_INSTITUTION_NAME = "APPLIED PHYSICS LABORATORY" /*** TIME PARAMETERS ***/ PRODUCT_CREATION_TIME = 2007-09-25T20:00:00 /*** INSTRUMENT ENGINEERING PARAMETERS ***/ INSTRUMENT_NAME = "MERCURY DUAL IMAGING SYSTEM NARROW ANGLE CAMERA" INSTRUMENT_ID = "MDIS-NAC" MESS:FPU_BIN = 1 MESS:COMP12_8 = 0 OBJECT = FILE ^TABLE = "MDISNAC_BINNED_RESP_0.TAB" RECORD_TYPE = FIXED_LENGTH FILE_RECORDS = 1 RECORD_BYTES = 39 OBJECT = TABLE NAME = "MDIS NAC BINNED RESPONSIVITY MODEL, VERSION 0" INTERCHANGE_FORMAT = "ASCII" ROWS = 1 COLUMNS = 3 ROW_BYTES = 39 DESCRIPTION = "This is the model of responsivity for the MDIS narrow-angle camera, with pixel binning turned on (MESS:FPU_BIN = 1). It is used to correct raw DN to units of radiance, after correction for dark level, frame transfer smear, linearity, and flat field. The responsivity is in units of DN per unit time per unit radiance. It is dependent on CCD temperature T (MESS:CCD_TEMP), and binning state b. Exposure time t is in raw units of ms (MESS:EXPOSURE or EXPOSURE_DURATION) and radiance in units of W / (m**2 microns**1 sr**1). Responsivity is calculuated as Resp(T,b) = R(t=-30.3C,b) * [correction_offset(b) + T(CCD) * correction_slope(b)] where Resp(T,b) is responsivity at CCD temperature T in binning state b, T(CCD) is raw CCD temperature in units of DNs, R(t=-30.3C,b) is responsivity at CCD temperature of 1060 DN (-30.3C), correction_offset(b) is camera- dependent temperature correction offset for binning state b, correction_slope(f,b) is camera- and dependent temperature correction slope for binning state b. The temperature correction defaults to unity at CCD temperature of 1060 DN (-30.3C). To apply responsivity to obtain radiance L, the expression is L = DN_dk_sm_lin_fl / (t * Resp(T,b)) where DN_dk_sm_lin_fl is dark-, smear-, linearity-, and flat field-corrected DN, t is the exposure time in milliseconds, Resp(f,T,b) is the responsivity." OBJECT = COLUMN COLUMN_NUMBER = 1 NAME = REFERENCE_RESPONSIVITY DATA_TYPE = ASCII_REAL START_BYTE = 1 BYTES = 11 DESCRIPTION = "Responsivity at the reference temperature MESS:CCD_TEMP=1060 (-30.3C)." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 2 NAME = CORRECTION_OFFSET DATA_TYPE = ASCII_REAL START_BYTE = 13 BYTES = 12 DESCRIPTION = "Offset term in the CCD temperature correction to responsivity." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 3 NAME = CORRECTION_SLOPE DATA_TYPE = ASCII_REAL START_BYTE = 26 BYTES = 12 DESCRIPTION = "Slope term in the CCD temperature correction to responsivity." END_OBJECT = COLUMN END_OBJECT = TABLE END_OBJECT = FILE END