PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "RO-RIS-MPAE-ID-023 1/e" /* FILE CHARACTERISTICS */ RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 1 FILE_RECORDS = 10855 FILE_NAME = "W20150121T104954277ID4CF17.JPG" /* POINTERS TO DATA OBJECTS */ ^JPEG_DOCUMENT = "W20150121T104954277ID4CF17.JPG" /* MANDATORY FIELDS */ PRODUCT_ID = "W20150121T104954277ID4CF17.JPG" SOURCE_PRODUCT_ID = "W20150121T104954277ID4CF17.IMG" /* MISSION IDENTIFICATION */ INSTRUMENT_HOST_ID = "RO" INSTRUMENT_HOST_NAME = "ROSETTA-ORBITER" MISSION_ID = "ROSETTA" MISSION_NAME = "INTERNATIONAL ROSETTA MISSION" MISSION_PHASE_NAME = "COMET ESCORT 1" /* INSTRUMENT DESCRIPTION */ INSTRUMENT_ID = "OSIWAC" INSTRUMENT_NAME = "OSIRIS - WIDE ANGLE CAMERA" INSTRUMENT_TYPE = "FRAME CCD REFLECTING TELESCOPE" DETECTOR_DESC = "2048x2048 PIXELS BACKLIT FRAME CCD DETECTOR" DETECTOR_PIXEL_WIDTH = 13.5 DETECTOR_PIXEL_HEIGHT = 13.5 DETECTOR_TYPE = "SI CCD" DETECTOR_ID = "EEV-242" DETECTOR_TEMPERATURE = 167.04 ELEVATION_FOV = 11.680 AZIMUTH_FOV = 11.680 ROSETTA:VERTICAL_RESOLUTION = 9.949900e-05 ROSETTA:HORIZONTAL_RESOLUTION = 9.949900e-05 TELESCOPE_F_NUMBER = 5.600000 ROSETTA:VERTICAL_FOCAL_LENGTH = 0.1357 ROSETTA:HORIZONTAL_FOCAL_LENGTH = 0.1357 /* IMAGE IDENTIFICATION */ IMAGE_ID = "2" ROSETTA:PROCESSING_ID = 0 IMAGE_OBSERVATION_TYPE = "REGULAR" EXPOSURE_TYPE = "MANUAL" PRODUCT_TYPE = "RDR" PRODUCT_VERSION_ID = "1" PRODUCER_INSTITUTION_NAME = "Max Planck Institute for Solar System Research" PRODUCER_FULL_NAME = "CECILIA TUBIANA" PRODUCER_ID = "MPS" MEDIUM_TYPE = "ELECTRONIC" PUBLICATION_DATE = 2018-11-15 VOLUME_FORMAT = "ANSI" VOLUME_ID = "ROOSI_4250" VOLUME_NAME = "RESAMPLED OSIRIS WAC DATA FOR THE COMET ESCORT 1 PHASE" VOLUME_SERIES_NAME = "ROSETTA SCIENCE ARCHIVE" VOLUME_SET_NAME = "ROSETTA OSIRIS DATA" VOLUME_SET_ID = "DE_MPG_MPS_ROOSI_4250" VOLUME_VERSION_ID = "VERSION V1.0" VOLUMES = "UNK" DATA_SET_ID = "RO-C-OSIWAC-4-ESC1-67P-M12-STRLIGHT-V1.0" DATA_SET_NAME = "ROSETTA-ORBITER 67P OSIWAC 4 ESC1-MTP012 RDR-STRLIGHT V1.0" PROCESSING_LEVEL_ID = "4" PROCESSING_LEVEL_DESC = "Radiometrically calibrated, geometric distortion corrected data, out-of-field straylight corrected, in radiance uni ts" DATA_QUALITY_ID = "0000000000000000" DATA_QUALITY_DESC = "List of 0 and 1 to specify the quality of the image. Zeroes mean that the data are good, and a one means that the data are affected by this particular issue. The meaning of the individual entries from right to left are: 1: affected by shutter error 2: contains missing packets 3: header created with insufficient data 4: shutter backtravel opening (curtain) 5: shutter backtravel opening (ballistic dual) 6: first lines are dark Note that the field is 16 characters in total to allow for possible extensions in future, but not all digits are used. Any unused digit is set to 0. e.g. 0000000000000010 means that the image contains missing packets, 0000000000010001 means that the image is affected by a shutter error AND by dual ballistic backtravel opening." /* TIME IDENTIFICATION */ PRODUCT_CREATION_TIME = 2018-11-09T00:04:06 START_TIME = 2015-01-21T10:51:07.424 STOP_TIME = 2015-01-21T10:51:26.174 SPACECRAFT_CLOCK_START_COUNT = "1/0380458194.18192" SPACECRAFT_CLOCK_STOP_COUNT = "1/0380458213.01808" /* GEOMETRY */ NOTE = "The values of the keywords SC_SUN_POSITION_VECTOR SC_TARGET_POSITION_VECTOR and SC_TARGET_VELOCITY_VECTOR are related to the Earth Mean Equator J2000 reference frame. The values of SUB_SPACECRAFT_LATITUDE and SUB_SPACECRAFT_LONGITUDE are northern latitude and eastern longitude in the standard planetocentric IAU_ frame. All values are computed for the time t = START_TIME. Distances are given in , velocities in , Angles in ." TARGET_NAME = "67P/CHURYUMOV-GERASIMENKO 1 (1969 R1)" ROSETTA:SPICE_TARGET_NAME = "67P/CHURYUMOV-GERASIMENKO" TARGET_TYPE = COMET SC_SUN_POSITION_VECTOR = (-268071665.421 , 216835141.371 , 143806130.009 ) SPACECRAFT_SOLAR_DISTANCE = 373577434.226 SOLAR_ELONGATION = 80.39343 RIGHT_ASCENSION = 218.22314 DECLINATION = -5.48444 NORTH_AZIMUTH = 23.73186 SC_TARGET_POSITION_VECTOR = (-19.547 , -20.096 , -1.257 ) SC_TARGET_VELOCITY_VECTOR = (-0.036 , 0.046 , -0.142 ) TARGET_CENTER_DISTANCE = 28.06308 SPACECRAFT_ALTITUDE = 27.48269 SUB_SPACECRAFT_LATITUDE = 26.23058 SUB_SPACECRAFT_LONGITUDE = 275.98334 SUB_SOLAR_LATITUDE = 28.26918 SUB_SOLAR_LONGITUDE = 26.45100 PHASE_ANGLE = 99.60657 GROUP = SC_COORDINATE_SYSTEM COORDINATE_SYSTEM_NAME = "S/C-COORDS" ORIGIN_OFFSET_VECTOR = (268083122.566 , -216844407.600 , -143812275.565 ) ORIGIN_ROTATION_QUATERNION = (0.40967009, 0.17739415, 0.71892457, -0.53277500) QUATERNION_DESC = "J2000 to Rosetta Coordinate System quaternion (nx sin(a/2), ny sin(a/2), nz sin(a/2), cos(a/2)" REFERENCE_COORD_SYSTEM_NAME = "EME J2000" END_GROUP = SC_COORDINATE_SYSTEM GROUP = CAMERA_COORDINATE_SYSTEM COORDINATE_SYSTEM_NAME = "WAC_CAMERA_FRAME" ORIGIN_OFFSET_VECTOR = (-0.001050 , 0.000232 , 0.002114 ) ORIGIN_ROTATION_QUATERNION = (-0.70710115, 0.70710470, -0.00282099, -0.00171403) QUATERNION_DESC = "Rosetta Coordinate System to camera coordinate system quaternion (nx sin(a/2), ny sin(a/2), nz sin(a/2), cos(a/2)" REFERENCE_COORD_SYSTEM_NAME = "S/C-COORDS" END_GROUP = CAMERA_COORDINATE_SYSTEM SPICE_FILE_NAME = ("ck\CATT_DV_145_02_______00216.BC", "ck\RATT_DV_145_01_01_T6_00216.BC", "dsk\ROS_CG_M003_OSPCLPS_N_V1.BDS", "fk\ROS_V32.TF", "fk\ROS_V33.TF", "ik\ROS_OSIRIS_V15.TI", "lsk\NAIF0011.TLS", "pck\ROS_CG_RAD_V10.TPC", "sclk\ROS_160929_STEP.TSC", "spk\CORB_DV_257_03___T19_00345.BSP", "spk\DE405.BSP", "spk\RORB_DV_257_03___T19_00345.BSP") /* IMAGE POINT OF INTEREST */ GROUP = IMAGE_POI ROSETTA:POINT_OF_INTEREST = "N/A" ROSETTA:IMAGE_POI_PIXEL = "N/A" ROSETTA:COORDINATE_SYSTEM = "N/A" ROSETTA:SURFACE_INTERCEPT_DISTANCE = "N/A" ROSETTA:SURF_INT_CART_COORD = "N/A" END_GROUP = IMAGE_POI /* SCIENCE ACTIVITY */ GROUP = SCIENCE_ACTIVITY ROSETTA:MISSION_PHASE = ("LTP004", "MTP012", "STP040") ROSETTA:RATIONALE_DESC = "GAS" ROSETTA:OPERATIONAL_ACTIVITY = "TAG_GAS_VAC_CAMPAIGN" ROSETTA:ACTIVITY_NAME = "STP040_DIURNAL_VAC" END_GROUP = SCIENCE_ACTIVITY /* DATA CONTENT FLAGS */ GROUP = SR_DATA_CONTENT ROSETTA:PREPIXEL_FLAG = FALSE ROSETTA:POSTPIXEL_FLAG = FALSE ROSETTA:OVERCLOCKING_LINES_FLAG = FALSE ROSETTA:CCD_DATA_FLAG = TRUE ROSETTA:B1_SHUTTER_PULSE_FLAG = TRUE ROSETTA:B2_SHUTTER_PULSE_FLAG = TRUE END_GROUP = SR_DATA_CONTENT /* STATUS FLAGS */ GROUP = SR_STATUS_FLAGS ROSETTA:SHUTTER_FOUND_IN_ERROR_FLAG = FALSE ROSETTA:SHUTTER_PRE_INIT_FAILED_FLAG = FALSE ROSETTA:ERROR_RECOVERY_FAILED_FLAG = FALSE ROSETTA:EXPOSURE_STATUS_ID = SUCCESS END_GROUP = SR_STATUS_FLAGS /* MECHANISM STATUS FLAGS */ GROUP = SR_MECHANISM_STATUS FILTER_NUMBER = "17" FILTER_NAME = "Empty_OI" ROSETTA:FRONT_DOOR_STATUS_ID = OPEN END_GROUP = SR_MECHANISM_STATUS /* IMAGE ACQUISITION OPTIONS */ GROUP = SR_ACQUIRE_OPTIONS ROSETTA:SCIENCE_DATA_LINK = HIGHSPEED ROSETTA:DATA_ROUTING_ID = QUEUE2 EXPOSURE_DURATION = 18.7500 ROSETTA:COMMANDED_FILTER_NUMBER = 17 ROSETTA:COMMANDED_FILTER_NAME = "Empty_OI" ROSETTA:GRAYSCALE_TESTMODE_FLAG = FALSE ROSETTA:HARDWARE_BINNING_ID = "4x4" ROSETTA:AMPLIFIER_ID = B ROSETTA:GAIN_ID = HIGH ROSETTA:ADC_ID = TANDEM ROSETTA:OVERCLOCKING_LINES_FLAG = FALSE ROSETTA:OVERCLOCKING_PIXELS_FLAG = FALSE ROSETTA:CCD_ENABLED_FLAG = TRUE ROSETTA:ADC_ENABLED_FLAG = TRUE ROSETTA:BLADE1_PULSES_ENABLED_FLAG = TRUE ROSETTA:BLADE2_PULSES_ENABLED_FLAG = TRUE ROSETTA:BULBMODE_ENABLED_FLAG = FALSE ROSETTA:FRAMETRANSFER_ENABLED_FLAG = FALSE ROSETTA:WINDOWING_ENABLED_FLAG = TRUE ROSETTA:SHUTTER_ENABLED_FLAG = TRUE ROSETTA:DITHERING_ENABLED_FLAG = FALSE ROSETTA:CRB_DUMP_MODE = 0 ROSETTA:CRB_PULSE_MODE = 0 ROSETTA:SUBFRAME_COORDINATE_ID = "ELECTRICAL" ROSETTA:X_START = 0 ROSETTA:X_END = 2048 ROSETTA:Y_START = 0 ROSETTA:Y_END = 2048 ROSETTA:SHUTTER_PRETRIGGER_DURATION = 0.0650 ROSETTA:CRB_TO_PCM_SYNC_MODE = 15 ROSETTA:AUTOEXPOSURE_FLAG = FALSE ROSETTA:LOWPOWER_MODE_FLAG = FALSE ROSETTA:DUAL_EXPOSURE_FLAG = FALSE END_GROUP = SR_ACQUIRE_OPTIONS /* PROCESSING FLAGS */ GROUP = SR_PROCESSING_FLAGS BAD_PIXEL_REPLACEMENT_FLAG = FALSE ROSETTA:ADC_OFFSET_CORRECTION_FLAG = TRUE ROSETTA:BIAS_CORRECTION_FLAG = TRUE ROSETTA:COHERENT_NOISE_CORRECTION_FLAG = FALSE DARK_CURRENT_CORRECTION_FLAG = FALSE ROSETTA:FLATFIELD_HI_CORRECTION_FLAG = TRUE ROSETTA:BAD_PIXEL_REPLACEMENT_GROUND_FLAG = TRUE ROSETTA:FLATFIELD_LO_CORRECTION_FLAG = TRUE ROSETTA:EXPOSURETIME_CORRECTION_FLAG = TRUE ROSETTA:RADIOMETRIC_CALIBRATION_FLAG = TRUE ROSETTA:GEOMETRIC_DISTORTION_CORRECTION_FLAG = TRUE ROSETTA:REFLECTIVITY_NORMALIZATION_FLAG = FALSE ROSETTA:INFIELD_STRAYLIGHT_CORRECTION_FLAG = FALSE ROSETTA:OUTFIELD_STRAYLIGHT_CORRECTION_FLAG = TRUE END_GROUP = SR_PROCESSING_FLAGS /* SHUTTER CONFIG */ GROUP = SR_SHUTTER_CONFIG ROSETTA:PROFILE_ID = "4294967295" ROSETTA:CONTROL_MASK = "16#39#" ROSETTA:TESTMODE_FLAG = FALSE ROSETTA:ZEROPULSE_FLAG = TRUE ROSETTA:LOCKING_ENCODER_FLAG = TRUE ROSETTA:CHARGEMODE_ID = SLOW ROSETTA:SHUTTER_OPERATION_MODE = "NORMAL" ROSETTA:NUM_OF_EXPOSURES = 1 END_GROUP = SR_SHUTTER_CONFIG /* SHUTTER STATUS */ GROUP = SR_SHUTTER_STATUS ROSETTA:STATUS_MASK = "16#6000600#" ROSETTA:ERROR_TYPE_ID = SHUTTER_ERROR_NONE END_GROUP = SR_SHUTTER_STATUS /* DATA COMPRESSION AND SEGMENTATION */ GROUP = SR_COMPRESSION ROSETTA:LOST_PACKETS = (0) ROSETTA:SEGMENT_X = (0) ROSETTA:SEGMENT_Y = (0) ROSETTA:SEGMENT_W = (512) ROSETTA:SEGMENT_H = (512) ROSETTA:ENCODING = (SPIHT_LIFT) ROSETTA:COMPRESSION_RATIO = ( 1.8) ROSETTA:LOSSLESS_FLAG = (TRUE) ROSETTA:SPIHT_PYRAMID_LEVELS = (8) ROSETTA:SPIHT_THRESHOLD_BITS = (16) ROSETTA:SPIHT_MEAN = (673) ROSETTA:SPIHT_MEAN_SHIFT = (2) ROSETTA:SPIHT_WAVE_LEVELS = (4) PIXEL_AVERAGING_WIDTH = (1) PIXEL_AVERAGING_HEIGHT = (1) ROSETTA:SMOOTH_FILTER_ID = (NONE) ROSETTA:SQRT_FILTER_FLAG = (FALSE) ROSETTA:SQRT_GAIN = ( 0.0) END_GROUP = SR_COMPRESSION /* SUBSYSTEM HARDWARE IDENTIFICATION */ GROUP = SR_HARDWARE_CONFIG ROSETTA:DATA_PROCESSING_UNIT_ID = FS ROSETTA:POWER_CONVERTER_ID = FS ROSETTA:MOTOR_CONTROLLER_ID = FS ROSETTA:NAC_CCD_READOUT_BOX_ID = FM ROSETTA:WAC_CCD_READOUT_BOX_ID = FM ROSETTA:NAC_CAMERA_ID = FM ROSETTA:WAC_CAMERA_ID = FM END_GROUP = SR_HARDWARE_CONFIG /* SYSTEM HEATER STATUS */ GROUP = SR_HEATER_STATUS ROSETTA:CCD_HEATER_POWER = 0.000 ROSETTA:NAC_MAIN_FDM_POWER = 1.399 ROSETTA:NAC_RED_FDM_POWER = 0.000 ROSETTA:NAC_MAIN_PPE_POWER = 3.781 ROSETTA:NAC_RED_PPE_POWER = 0.000 ROSETTA:WAC_MAIN_STR1_POWER = 2.110 ROSETTA:WAC_RED_STR1_POWER = 0.000 ROSETTA:WAC_MAIN_STR2_POWER = 2.478 ROSETTA:WAC_RED_STR2_POWER = 0.000 END_GROUP = SR_HEATER_STATUS /* POWER CONVERTER SWITCH STATUS */ GROUP = SR_SWITCH_STATUS ROSETTA:WAC_SHUTFAILSAFEEXEC_FLAG = OFF ROSETTA:NAC_SHUTFAILSAFEEXEC_FLAG = OFF ROSETTA:WAC_DOORFAILSAFEEXEC_FLAG = OFF ROSETTA:NAC_DOORFAILSAFEEXEC_FLAG = OFF ROSETTA:PCM_PASSCTRLACTIVE_FLAG = OFF ROSETTA:WAC_SHUTFAILSAFE_ENAB_FLAG = OFF ROSETTA:WAC_SHUTTERPOWER_FLAG = ON ROSETTA:WAC_CCDANNEALHEATER_FLAG = OFF ROSETTA:WAC_CRB_PRIMEPOWER_FLAG = ON ROSETTA:NAC_SHUTFAILSAFE_ENAB_FLAG = OFF ROSETTA:NAC_SHUTTERPOWER_FLAG = ON ROSETTA:NAC_CCDANNEALHEATER_FLAG = OFF ROSETTA:NAC_CRB_PRIMEPOWER_FLAG = ON ROSETTA:WAC_STRUCTUREHEATER_R_FLAG = OFF ROSETTA:WAC_STRUCTUREHEATER_M_FLAG = OFF ROSETTA:WAC_RED_CALLAMP_FLAG = OFF ROSETTA:WAC_MAIN_CALLAMP_FLAG = OFF ROSETTA:WAC_DOORFAILSAFE_ENAB_FLAG = OFF ROSETTA:NAC_IFPLATEHEATER_R_FLAG = OFF ROSETTA:NAC_IFPLATEHEATER_M_FLAG = OFF ROSETTA:NAC_RED_CALLAMP_FLAG = OFF ROSETTA:NAC_MAIN_CALLAMP_FLAG = OFF ROSETTA:NAC_DOORFAILSAFE_ENAB_FLAG = OFF ROSETTA:MCB_RED_MOTORPOWER_FLAG = OFF ROSETTA:MCB_MAIN_MOTORPOWER_FLAG = ON ROSETTA:MCB_FLAG = MAIN ROSETTA:PRIMARY_POWER_RAIL_FLAG = REDUNDANT END_GROUP = SR_SWITCH_STATUS /* POWER SYSTEM STATUS */ GROUP = SR_POWER_STATUS ROSETTA:V_28_MAIN = 3.5 ROSETTA:V_28_REDUNDANT = 27.9 ROSETTA:V_5 = 5.2 ROSETTA:V_3 = 3.4 ROSETTA:V_15 = 15.0 ROSETTA:V_M15 = -15.0 ROSETTA:V_NAC_REFERENCE = -9.9 ROSETTA:V_WAC_REFERENCE = -10.0 ROSETTA:CAMERA_V_24 = 25.5 ROSETTA:CAMERA_V_8 = 8.4 ROSETTA:CAMERA_V_M12 = -12.4 ROSETTA:CAMERA_V_5_ANALOG = 5.4 ROSETTA:CAMERA_V_5_DIGITAL = 5.3 ROSETTA:CAMERA_V_M5 = -5.3 ROSETTA:I_28_MAIN = -79.6 ROSETTA:I_28_REDUNDANT = 897.8 ROSETTA:I_5 = 1754.0 ROSETTA:I_3 = 129.7 ROSETTA:I_15 = 122.3 ROSETTA:I_M15 = 61.6 ROSETTA:CAMERA_I_24 = 14.7 ROSETTA:CAMERA_I_8 = 12.2 ROSETTA:CAMERA_I_M12 = 67.4 ROSETTA:CAMERA_I_5_ANALOG = 98.0 ROSETTA:CAMERA_I_5_DIGITAL = 122.3 ROSETTA:CAMERA_I_M5 = 64.2 END_GROUP = SR_POWER_STATUS /* CALIBRATED TEMPERATURES */ GROUP = SR_TEMPERATURE_STATUS ROSETTA:T_MAIN_PCM = 294.4 ROSETTA:T_REDUNDANT_PCM = 296.0 ROSETTA:T_WAC_STRUCTURE_MAIN_1 = 285.2 ROSETTA:T_WAC_STRUCTURE_REDUNDANT_1 = 285.5 ROSETTA:T_WAC_STRUCTURE_MAIN_2 = 285.2 ROSETTA:T_WAC_STRUCTURE_REDUNDANT_2 = 285.5 ROSETTA:T_WAC3 = 288.0 ROSETTA:T_WAC4 = 286.5 ROSETTA:T_WAC_WHEEL_MOTOR_1 = 282.2 ROSETTA:T_WAC_WHEEL_MOTOR_2 = 282.4 ROSETTA:T_WAC_DOOR_MOTOR = 283.0 ROSETTA:T_NAC_CCD_VIA_MCB = 203.5 ROSETTA:T_WAC_CCD_VIA_MCB = 172.0 ROSETTA:T_NAC_WHEEL_MOTOR_1 = 254.0 ROSETTA:T_NAC_WHEEL_MOTOR_2 = 254.8 ROSETTA:T_NAC_DOOR_MOTOR = 252.2 ROSETTA:T_NAC_DOOR_IF_MAIN = 248.2 ROSETTA:T_NAC_MIRROR_2 = 226.6 ROSETTA:T_NAC_PPE_IF_REDUNDANT = 255.3 ROSETTA:T_NAC_DOOR_IF_REDUNDANT = 248.2 ROSETTA:T_NAC_PPE_IF_MAIN = 255.0 ROSETTA:T_NAC_MIRROR_1_AND_3 = 225.6 ROSETTA:T_DSP_MAIN = 304.5 ROSETTA:T_DSP_REDUNDANT = 295.1 ROSETTA:T_BOARD_CONTROLLER = 298.7 ROSETTA:T_BOARD_DRIVER = 296.4 ROSETTA:CAMERA_TCCD = 167.0 ROSETTA:CAMERA_T_SENSORHEAD = 289.3 ROSETTA:CAMERA_T_ADC_1 = 296.6 ROSETTA:CAMERA_T_ADC_2 = 297.9 ROSETTA:CAMERA_T_SHUTTER_MOTOR_1 = 284.1 ROSETTA:CAMERA_T_SHUTTER_MOTOR_2 = 284.6 ROSETTA:CAMERA_T_POWER_CONVERTER = 318.9 ROSETTA:CAMERA_T_DOSIMETER = 292.6 END_GROUP = SR_TEMPERATURE_STATUS /* RADIATION ENVIRONMENT */ GROUP = SR_RADIATION_STATUS ROSETTA:CAMERA_DOSIS = 503.1 ROSETTA:SREM_PROTONS_GT_20MEV = 0 ROSETTA:SREM_PROTONS_50_TO_70MEV = 0 ROSETTA:SREM_ELECTRONS_LT_2MEV = 0 END_GROUP = SR_RADIATION_STATUS OBJECT = JPEG_DOCUMENT DOCUMENT_NAME = "W20150121T104954277ID4CF17.JPG" PUBLICATION_DATE = 2018-11-15 DOCUMENT_TOPIC_TYPE = "BROWSE IMAGE" DESCRIPTION = "BROWSE IMAGE W20150121T104954277ID4CF17" INTERCHANGE_FORMAT = BINARY DOCUMENT_FORMAT = "JPG" END_OBJECT = JPEG_DOCUMENT END