PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT INTERCHANGE_FORMAT = ASCII PUBLICATION_DATE = 2004-07-02 NOTE = "Explanation of PDS labels for STARDUST NAVCAM Image files." END_OBJECT = TEXT END Example label ============= PDS_VERSION_ID = PDS3 /*** FILE FORMAT ***/ RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 2092 FILE_RECORDS = 1035 /*** POINTERS TO OBJECTS IN FILE ***/ ^IMAGE_HISTOGRAM = 4 ^IMAGE = 12 /*** GENERAL DATA DESCRIPTION PARAMETERS ***/ MISSION_NAME = "STARDUST" SPACECRAFT_NAME = "STARDUST" DATA_SET_ID = "SDU-A-NAVCAM-2-EDR-ANNEFRANK-V1.0" PRODUCT_ID = "N0352AE02.IMG" PRODUCER_INSTITUTION_NAME = "APPLIED COHERENT TECHNOLOGY CORP" PRODUCT_TYPE = "EDR" SOFTWARE_NAME = "DMAPKTDECOM 2.1" MISSION_PHASE_NAME = "ANNEFRANK ENCOUNTER" TARGET_NAME = "5535 ANNEFRANK" FRAME_SEQUENCE_NUMBER = 352 /*** TIME PARAMETERS ***/ PRODUCT_CREATION_TIME = 2003-02-14T21:24:18 START_TIME = 2002-10-31T20:27:10.337 STOP_TIME = 2002-10-31T20:27:11.335 SPACECRAFT_CLOCK_START_COUNT = "0720563435:010" SPACECRAFT_CLOCK_STOP_COUNT = "0720563436:010" TIME_FROM_CLOSEST_APPROACH = -1.349378 /*** CAMERA RELATED PARAMETERS ***/ INSTRUMENT_NAME = "NAVIGATION CAMERA" INSTRUMENT_HOST_NAME = "STARDUST" INSTRUMENT_ID = "NAVCAM" DATA_STREAM_TYPE = "CRUISE" EXPOSURE_DURATION = 998.35 LIGHT_FLOOD_STATE_FLAG = "OFF" FILTER_NUMBER = 0 FILTER_NAME = "OPNAV" CENTER_FILTER_WAVELENGTH = 698.8 /*** SCAN MIRROR ANGLE AND RATE ***/ SCAN_MIRROR_ANGLE = 19.97131 SCAN_MIRROR_RATE = 0.00000 /*** TEMPERATURE PARAMETERS IN ***/ FOCAL_PLANE_TEMPERATURE = 228.65 SCAN_MIRROR_TEMPERATURE = 259.02 NOTE = " Earth Mean Equator and Vernal Equinox of J2000 is the inertial reference system used to specify observational geometry. Geometric parameters are based on best available data at time of product creation. Refer to the SPICE archive for the most current observational geometry data." /*** LINE-OF-SITE ON CELESTIAL SPHERE: ANGLES IN ***/ RIGHT_ASCENSION = 179.9559 DECLINATION = 6.6455 TWIST_ANGLE = 143.5115 RETICLE_POINT_RA = ( 177.4833, 179.5835, 182.4323, 180.3246 ) RETICLE_POINT_DECLINATION = ( 6.2716, 9.1031, 7.0070, 4.1875 ) EMEJ2000_SC_QUATERNION = ( -0.18442, -0.59224, -0.78094, -0.07334 ) /*** SMEAR MAGNITUDE AND DIRECTION ***/ SMEAR_MAGNITUDE = 7.760 SMEAR_AZIMUTH = 229.267 /*** TARGET AND SUN POSITIONS AND VELOCITIES ***/ SC_TARGET_POSITION_VECTOR = ( -838739.9, 5302.6, 84327.3 ) SC_TARGET_VELOCITY_VECTOR = ( 7.192688, -0.069449, -0.733898 ) TARGET_CENTER_DISTANCE = 842985.0 SC_SUN_POSITION_VECTOR = ( -295208803.1, 170205077.7, 86486585.7 ) SC_SUN_VELOCITY_VECTOR = ( -2.669797, -15.265649, -5.973583 ) /*** PIXEL SCALES ***/ HORIZONTAL_PIXEL_SCALE = 50288.111 VERTICAL_PIXEL_SCALE = 50288.111 /*** VIEWING AND LIGHTING GEOMETRY (SUN ON TARGET) ***/ PHASE_ANGLE = 149.599 /*** DESCRIPTION OF OBJECTS CONTAINED IN THE FILE ***/ OBJECT = IMAGE_HISTOGRAM ITEMS = 4096 DATA_TYPE = MSB_UNSIGNED_INTEGER ITEM_BYTES = 4 END_OBJECT = IMAGE_HISTOGRAM OBJECT = IMAGE LINES = 1024 LINE_SAMPLES = 1024 SAMPLE_TYPE = MSB_UNSIGNED_INTEGER SAMPLE_BITS = 16 SAMPLE_BIT_MASK = 2#0000111111111111# MAXIMUM = 610 MINIMUM = 0 LINE_PREFIX_BYTES = 20 LINE_SUFFIX_BYTES = 24 MEAN = 37.056738 STANDARD_DEVIATION = 140.277559 SATURATED_PIXEL_COUNT = 0 CHECKSUM = 38856806 DESCRIPTION = " The IMAGE size reflects the size of the detector, however in some cases data from only certain sections of the detector were downlinked. In these cases the pixels in the image corresponding to the areas for which data had not been downlinked are filled with hex null values (i.e., zeroes). WINDOW objects define the areas containing non-null data." OBJECT = WINDOW DESCRIPTION = "Area of the image containing actual CCD data." TARGET_NAME = "N/A" FIRST_LINE = 417 FIRST_LINE_SAMPLE = 311 LINES = 151 LINE_SAMPLES = 151 END_OBJECT = WINDOW OBJECT = WINDOW DESCRIPTION = "Area of the image containing actual CCD data." TARGET_NAME = "N/A" FIRST_LINE = 385 FIRST_LINE_SAMPLE = 139 LINES = 151 LINE_SAMPLES = 151 END_OBJECT = WINDOW OBJECT = WINDOW DESCRIPTION = "Area of the image containing actual CCD data." TARGET_NAME = "N/A" FIRST_LINE = 387 FIRST_LINE_SAMPLE = 615 LINES = 151 LINE_SAMPLES = 151 END_OBJECT = WINDOW END_OBJECT = IMAGE END General notes regarding label ============================= * Strings appear in quotes. * Integers and PDS times do not take quotes. * Lists are enclosed within {} type brackets. * If a field is unknown, 'UNK' may be entered. * If a field is not applicable, 'N/A' may be entered. * Fields can spill freely, with or without white space, onto following lines. * Not all images contain the WINDOW object as part of the image object. This sub-object is only present when windowed data is present in the image. Images which are full-frame do not have the WINDOW sub-object. Definition of Label Keywords/Values =================================== PDS_VERSION_ID Version number of the PDS standards documents that is valid when a data product label is created. PDS3 is used in all NAVCAM image labels. RECORD_TYPE File record format; FIXED_LENGTH in all NAVCAM image labels. RECORD_BYTES Number of bytes in each physical record, including record terminators and separators; 2092 for uncompressed images and 1048 for compressed images. FILE_RECORDS Number of physical file records, including both label records and data records; 1032 for uncompressed images and 1025 for compressed images. ^IMAGE_HISTOGRAM Pointer to the image histogram object; points to record number 1 in all images. ^IMAGE Pointer to the image data; points to file record number 9 in uncompressed images and to file record number 2 in compressed images. MISSION_NAME Mission name; "STARDUST" in all NAVCAM image labels. SPACECRAFT_NAME Spacecraft name; "STARDUST" in all NAVCAM image labels. DATA_SET_ID Data set ID; "SDU-A-NAVCAM-2-EDR-ANNEFRANK-V1.0" for Annefrank encounter data set images or "SDU-C-NAVCAM-2-EDR-WILD2-V1.0" for Wild 2 encounter data set images. The fields of these data set IDs mean: 'SDU' for Stardust spacecraft; 'A' for asteroid Annefrank or 'C' for comet Wild 2; 'NAVCAM' for NAVCAM data; '2' for the CODMAC processing level; 'EDR' for data type identifier; 'ANNEFRANK' or Annefrank or 'WILD2' for Wild 2 encounter data and 'V1.0' for the data set version number. PRODUCT_ID Permanent, unique identifier assigned to the image; same as the file name in all NAVCAM image labels; has the following form: NXXXXPPFV.IMG where: N = Navigation Camera (fixed) XXXX = frame sequence # ordered sequentially by time. PP = Mission Phase ( possible values ) PL: PRELAUNCH C1: CRUISE 1 EE: EARTH/MOON ENCOUNTER C2: CRUISE 2 AE: ANNEFRANK ENCOUNTER C2: CRUISE 2 WE: WILD 2 ENCOUNTER C3: CRUISE 3 ER: EARTH RETURN C4: CRUISE 4 F = filter number, possible values: 0: Navigation Filter 1: NH2 Filter 2: Oxygen ( O[1D] ) Filter 3: C2 ( & Blue ) Filter 4: Yellow Continuum Filter 5: Red Continuum Filter 6: Infrared Continuum Filter 7: High Resolution Filter V = Image version number IMG = file extension (fixed). PRODUCER_INSTITUTION_NAME Producer institution name; in all NAVCAM image labels, "APPLIED COHERENT TECHNOLOGY CORP", the original developer of the NAVCAM image production software. This software was later modified and run by the Stardust Data Management and Archive team (SDMA) at JPL. PRODUCT_TYPE Type of the data product; "EDR" in all NAVCAM image labels. SOFTWARE_NAME Name of the image processing software; "DMAPKTDECOM 2.1" in all NAVCAM image labels. MISSION_PHASE_NAME Mission phase name; one of the Stardust mission phases: "PRELAUNCH" "CRUISE 1" "EARTH/MOON ENCOUNTER" "CRUISE 2" "ANNEFRANK ENCOUNTER" "CRUISE 2" "WILD 2 ENCOUNTER" "CRUISE 3" "EARTH RETURN" "CRUISE 4" TARGET_NAME Name of the target of the observation; "5535 ANNEFRANK" or "81P/WILD 2 (1978 A2)" only if the direction from the spacecraft to the asteroid or comet was computed to be within the camera FOV bounds, otherwise set to 'N/A'. FRAME_SEQUENCE_NUMBER Sequential frame number of the image acquired during flight. PRODUCT_CREATION_TIME Product creation time in YYYY-MM-DDThh:mm:ss. format. START_TIME Time of start of observation; time of the start of the integration time of the camera, presented as UTC in YYYY-MM-DDThh:mm:ss.### format. STOP_TIME Time of end of observation; time of the end of the integration time of the camera, presented as UTC in YYYY-MM-DDThh:mm:ss.### format. SPACECRAFT_CLOCK_START_COUNT Time of start of observation; time of the start of the integration time of the camera, presented as spacecraft on-board clock in "XXXXXXXXX.YYY" format, where XXXXXXXXX is on-board clock integer seconds and YYY are fractional seconds (as count of 1/256th of a second.) SPACECRAFT_CLOCK_STOP_COUNT Time of end of observation; time of the end of the integration time of the camera, presented as spacecraft on-board clock in "XXXXXXXXX.YYY" format, where XXXXXXXXX is on-board clock integer seconds and YYY are fractional seconds (as count of 1/256th of a second.) TIME_FROM_CLOSEST_APPROACH Time to closest approach to the primary target of this data set, Annefrank for the images in Annefrank encounter data set or Wild 2 for the images in Wild 2 encounter data set, in days." INSTRUMENT_NAME Full name of the instrument; "NAVIGATION CAMERA" in all NAVCAM image labels. INSTRUMENT_HOST_NAME Name of the host on which an instrument is based; "STARDUST" in all NAVCAM image labels. INSTRUMENT_ID Abbreviated name or acronym of the instrument; "NAVCAM" in all NAVCAM image labels. DATA_STREAM_TYPE Type of data stream from which this image was created; "CRUISE" or "ENCOUNTER", identifying the operating mode of the camera when the image was acquired. EXPOSURE_DURATION Exposure duration (integration time) of the image observation, in milliseconds. LIGHT_FLOOD_STATE_FLAG Flag indicating whether the calibration lamp was "ON" or "OFF". FILTER_NUMBER Number of instrument filter (or number of the position of the filter wheel) through which an image or measurement was acquired; one of the eight possible filter positions: 0: Navigation Filter 1: NH2 Filter 2: Oxygen ( O[1D] ) Filter 3: C2 ( & Blue ) Filter 4: Yellow Continuum Filter 5: Red Continuum Filter 6: Infrared Continuum Filter 7: High Resolution Filter. FILTER_NAME Filter name; one of the filter names: 0: "OPNAV" 1: "NH2" 2: "OXYGEN" 3: "C2" 4: "YELLOW" 5: "RED" 6: "NIR" 7: "HIRES" CENTER_FILTER_WAVELENGTH Filter center wavelength, in nanometers: 0: 698.8 nm 1: 665.1 nm 2: 633.6 nm 3: 513.2 nm 4: 580.2 nm 5: 712.9 nm 6: 874.6 nm 7: 596.4 nm SCAN_MIRROR_ANGLE Angle of the scan mirror at the instant the image was taken, in degrees. The mirror sweeps through the plane formed by the spacecraft X and Z axes. When the mirror is at 0 degrees, the light path is essentially from the +X axis. As the mirror rotates to +90 degrees, the light path is from the -Z axis. When the mirror moves on to +180 degrees, the light path is in the direction of the -X axis. The range of the mirror is approximately 0 degrees to +200 degrees. SCAN_MIRROR_RATE Last commanded velocity for the scan mirror, in degrees per second. The scan mirror is not commanded to a position, but rather is reset to an initial position and is then commanded at a specific velocity for a specific amount of time. The value given here is that commanded velocity." FOCAL_PLANE_TEMPERATURE Temperature of the Charge Coupled Device (CCD), in Kelvin. SCAN_MIRROR_TEMPERATURE Temperature of the Scan Mirror, in Kelvin. RIGHT_ASCENSION Right ascension of the CCD center view direction (line 512.5, sample 512.5) in the EME J2000 reference frame. DECLINATION Declination of the CCD center view direction (line 512.5, sample 512.5) in the EME J2000 reference frame. TWIST_ANGLE Angle of rotation about the CCD center view direction (line 512.5, sample 512.5) relative to the EME J2000 reference frame. For the NAVCAM images this is the angle between the leftward direction (in left-right, top-down displayed image) and projection of the EME J2000 +Z axis onto the image plane, measured clockwise. Together RIGHT_ASCENSION, DECLINATION and TWIST_ANGLE elements define the pointing direction and orientation of an image or scan platform. RETICLE_POINT_RA Right ascensions of the view directions of the upper left pixel of the image (line 1, sample 1), upper right pixel of the image (line 1, sample 1024), lower right pixel of the image (line 1024, sample 1024), and lower left pixel of the image (last 1024, sample 1) in the EME J2000 reference frame. RETICLE_POINT_DECLINATION Declinations of the view directions of the upper left pixel of the image (line 1, sample 1), upper right pixel of the image (line 1, sample 1024), lower right pixel of the image (line 1024, sample 1024), and lower left pixel of the image (last 1024, sample 1) in the EME J2000 reference frame. EMEJ2000_SC_QUATERNION Quaternion encapsulating transformation from the EME J2000 to spacecraft reference frame. SMEAR_MAGNITUDE Number of pixels the image was smeared during the exposure time. SMEAR_AZIMUTH Azimuth of the direction in which the image was smeared, in degrees. This angle is measured clockwise from a horizontal reference line. SC_TARGET_POSITION_VECTOR Position vector, in kilometers, from the spacecraft to the named target center expressed in the EME J2000 reference frame, corrected for light time and stellar aberration, computed at the start of image exposure. This keyword is set to "N/A" if the TARGET_NAME is "N/A". SC_TARGET_VELOCITY_VECTOR Velocity vector, in kilometers per second, of the named target as seen from the spacecraft expressed in the EME J2000 reference frame, corrected for light time and stellar aberration, computed at the start of image exposure. This keyword is set to "N/A" if the TARGET_NAME is "N/A". TARGET_CENTER_DISTANCE Distance, in kilometers, between the spacecraft and the center of mass of the named target. This keyword is set to "N/A" if the TARGET_NAME is "N/A". SC_SUN_POSITION_VECTOR Position vector, in kilometers, from the spacecraft to the Sun expressed in the EME J2000 reference frame, corrected for light time and stellar aberration, computed at the start of image exposure. SC_SUN_VELOCITY_VECTOR Velocity vector, in kilometers per second, of the Sun as seen from the spacecraft expressed in the EME J2000 reference frame, corrected for light time and stellar aberration, computed at the start of image exposure. HORIZONTAL_PIXEL_SCALE Horizontal picture scale, in meters per pixel, at the named target. This value is approximate; it was computed using the nominal pixel IFOV of 0.059655 milliradians and the actual distance to the target center. This keyword is set to "N/A" if the TARGET_NAME is "N/A". VERTICAL_PIXEL_SCALE Vertical picture scale, in meters per pixel, at the named target. This value is approximate; it was computed using the nominal pixel IFOV of 0.059655 milliradians and the actual distance to the target center. This keyword is set to "N/A" if the TARGET_NAME is "N/A". PHASE_ANGLE Angle between a vector to the Sun and a vector to the spacecraft, both emanating from the center of the named target. This parameter is set to "N/A" if the TARGET_NAME is "N/A". OBJECT = IMAGE_HISTOGRAM Opening line of the histogram object definition block. ITEMS The number of items in histogram; 256 for compressed images and 4096 for uncompressed images. DATA_TYPE Data type of the histogram values; MSB_UNSIGNED_INTEGER in all NAVCAM image labels ITEM_BYTES Number of bytes occupied by a single histogram value; 4 in all NAVCAM image labels. END_OBJECT = IMAGE_HISTOGRAM Terminating line of the histogram object definition block. OBJECT = IMAGE Opening line of the image object definition block. LINES Total number of data instances along the vertical axis of an image; 1024 in all NAVCAM image labels. LINE_SAMPLES Total number of data instances along the horizontal axis of an image; 1024 in all NAVCAM image labels. SAMPLE_TYPE Data storage representation of sample value; MSB_UNSIGNED_INTEGER in all NAVCAM image labels. SAMPLE_BITS Number of bits contained in a sample value; 16 for uncompressed images or 8 for compressed images. SAMPLE_BIT_MASK Mask indicating active bits in a sample value; 2#0000111111111111# for uncompressed images or 2#11111111# for compressed images. MAXIMUM Largest value occurring in a given instance of the image array, excluding any prefix or suffix bytes. MINIMUM Smallest value occurring in a given instance of the image array, excluding any prefix or suffix bytes. LINE_PREFIX_BYTES Number of non-image bytes at the beginning of each line. LINE_SUFFIX_BYTES Number of non-image bytes at the end of each line. MEAN Mean value of the image array, excluding any prefix and suffix bytes. STANDARD_DEVIATION Standard deviation of the image array, excluding any prefix or suffix bytes. SATURATED_PIXEL_COUNT Number of pixels in the image whose pixel intensity value are equal to the maximum allowable digital number for the image. For compressed (8-bit) data, that maximum value is 255. For uncompressed (12-bit) data, that value is 4095. CHECKSUM Sum of all data values in a data object. OBJECT = WINDOW Opening line of the window sub-object definition block. Presence of this sub-object(s) of the image object indicates that this image contains only a small portion(s) of the original image. This portion(s) is(are) presented as rectangular windows with actual data within nominal size image filled with zeros. DESCRIPTION Description of the windowed data; set to "Area of the image containing actual CCD data." in all NAVCAM image labels. TARGET_NAME Target name for a particular window; set to "N/A" in all NAVCAM image labels. FIRST_LINE First line where window data begins in the image. FIRST_LINE_SAMPLE Leftmost column of the window data. This value, paired with the first_line element create the upper-leftmost pixel of valid image data. LINES Number of rows of image data associated with this window. LINE_SAMPLES number of columns of image data associated with this window. END_OBJECT = WINDOW Closing line of the window sub-object definition block. END Closing line of the PDS Label.