Data Structures
Here are the data structures with brief descriptions:
 Cast_altitude_tAltitude
 Cast_bds_10_tBDS 1,0 - Data Link Capability Report
 Cast_bds_20_tBDS 2,0 - Aircraft Identification
 Cast_bds_30_tBDS 3,0 - TCAS/ACAS Active Resolution Advisory
 Cast_bds_40_tBDS 4,0 - Selected Vertical Intention
 Cast_bds_50_tBDS 5,0 - Track and Turn Report
 Cast_bds_60_tBDS 6,0 - Heading and Speed Report
 Cast_bds_tBinary Data Source (BDS)
 Cast_callsign_tCallsign
 Cast_coordinate3d_tWGS-84 3D Coordinate
 Cast_coordinate_tWGS-84 2D Coordinate
 Cast_counter_t
 Cast_country_tCountry info definition
 Cast_datablock_ex_tExtracted datablock
 Cast_datablock_tDatablock
 Cast_dataitem_001_020_tItem I001/020 - Target Report Descriptor
 Cast_dataitem_001_030_tData Item I001/030 - Warning/Error Conditions
 Cast_dataitem_001_040_tData Item I001/040 - Measured Position in Polar Coordinates
 Cast_dataitem_001_042_tData Item I001/042 - Calculated Position in Cartesian Coordinates
 Cast_dataitem_001_060_tData Item I001/060 - Mode-2 Code Confidence Indicator
 Cast_dataitem_001_120_tData Item I001/120 - Calculated Position in Cartesian Coordinates
 Cast_dataitem_001_141_tData Item I001/141 - Truncated Time of Day
 Cast_dataitem_001_170_tData Item I001/170 - Track Status
 Cast_dataitem_001_210_tData Item I001/210 - Track Quality
 Cast_dataitem_004_040_tData Item I048/040 - Alert Identifier
 Cast_dataitem_004_060_tData Item I048/060 - Safety Net Function & System Status
 Cast_dataitem_004_100_tData Item I004/100 - Area Definition
 Cast_dataitem_004_120_tData Item I004/120 - Conflict Characteristics
 Cast_dataitem_004_170_tData Item I004/170 - Aircraft Identification & Characteristics 1
 Cast_dataitem_008_120_tData Item I008/120
 Cast_dataitem_010_020_tData Item I010/020 - Target Report Descriptor
 Cast_dataitem_010_040_tData Item I010/040 - Measured Position in Polar Co-ordinates
 Cast_dataitem_010_042_tData Item I010/042 - Calculated Position in Cartesian Co-ordinates
 Cast_dataitem_010_131_tData Item I010/131 - Amplitude of Primary Plot
 Cast_dataitem_010_170_tData Item I010/170 - Track Status
 Cast_dataitem_010_270_tData Item I010/270 - Target Size & Orientation
 Cast_dataitem_019_550_tData Item I019/550 - System Status
 Cast_dataitem_020_020_tData Item I020/020 - Target Report Descriptor
 Cast_dataitem_020_170_tData Item I020/170 - Track Status
 Cast_dataitem_020_230_tData Item I020/230 - Communications/ACAS Capability and Flight Status
 Cast_dataitem_020_400_tData Item I020/400 - Contributing Receivers
 Cast_dataitem_020_500_tData Item I020/500 - Position Accuracy
 Cast_dataitem_021_008_tData Item I021/008 - Aircraft Operational Status
 Cast_dataitem_021_016_tData Item I021/016 - Service Management
 Cast_dataitem_021_020_tData Item I021/020 - Emitter Category
 Cast_dataitem_021_032_tData Item I021/032 - Time of Day Accuracy
 Cast_dataitem_021_040_t
 Cast_dataitem_021_090_tData Item I021/090 - Quality Indicators
 Cast_dataitem_021_095_tData Item I021/095 - Velocity Accuracy
 Cast_dataitem_021_140_tData Item I021/140 - Geometric Altitude
 Cast_dataitem_021_145_tData Item I021/145 - Flight Level
 Cast_dataitem_021_146_tData Item I021/146 - Selected Altitude
 Cast_dataitem_021_150_tData Item I021/150 - Air Speed
 Cast_dataitem_021_151_tData Item I021/151 - True Air Speed
 Cast_dataitem_021_152_tData Item I021/152 - Magnetic Heading
 Cast_dataitem_021_160_tData Item I021/160 - Airborne Ground Vector
 Cast_dataitem_021_200_tData Item I021/200 - Target Status
 Cast_dataitem_021_210_tData Item I021/210 - MOPS Version
 Cast_dataitem_021_230_tData Item I021/230 - Roll Angle
 Cast_dataitem_021_271_tData Item I021/271 - Surface Capabilities and Characteristics
 Cast_dataitem_021_295_tData Item I021/295 - Data Ages
 Cast_dataitem_021_400_tData Item I021/400 - Receiver ID
 Cast_dataitem_021_A03_tData Item I021/040 - Target Report Descriptor (Prior version 0.26)
 Cast_dataitem_021_A05_tData Item I021/090 - Figure of Merit (Version 0.26)
 Cast_dataitem_021_A06_tData Item I021/A06 - Link Technology Indicator
 Cast_dataitem_021_A08_tData Item I021/200 - Target Status (Prior version 0.26)
 Cast_dataitem_023_100_tData Item I023/100 - Ground Station Status
 Cast_dataitem_034_041_tData Item - Antenna Rotation Speed
 Cast_dataitem_034_050_tData Item I034/050 - Station Configuration & Status
 Cast_dataitem_034_060_tData Item I034/060 - System Processing Mode
 Cast_dataitem_034_070_tData Item - Message Count Values
 Cast_dataitem_048_020_tData Item I048/020 - Target Report Descriptor
 Cast_dataitem_048_030_tData Item I048/030 - Warning/Error Conditions
 Cast_dataitem_048_040_tData Item I048/040 - Measured Position in Polar Co-ordinates
 Cast_dataitem_048_042_tData Item I048/042 - Calculated Position in Cartesian Co-ordinates
 Cast_dataitem_048_110_tData Item I048/110 - Height Measured by a 3D Radar
 Cast_dataitem_048_130_tData Item I048/130 - Radar Plot Characteristics
 Cast_dataitem_048_170_tData Item I048/170 - Track Status
 Cast_dataitem_048_230_tData Item I048/230 - Communications / ACAS Capability and Flight Status
 Cast_dataitem_048_260_tData Item I048/260 - ACAS Resolution Advisory Report
 Cast_dataitem_062_080_tData Item I062/080 - Track Status
 Cast_dataitem_062_110_tData Item I062/110 - Mode 5 Data reports & Extended Mode 1 Code
 Cast_dataitem_062_130_tData Item I062/130 - Calculated Track Geometric Altitude
 Cast_dataitem_062_135_tData Item I062/135 - Calculated Track Barometric Altitude
 Cast_dataitem_062_136_tData Item I062/136 - Measured Flight Level
 Cast_dataitem_062_200_tData Item I062/200 - Mode of Movement
 Cast_dataitem_062_210_tData Item I062/210 - Calculated Acceleration (Cartesian)
 Cast_dataitem_062_220_tData Item I062/220 - Calculated Rate of Climb/Descent
 Cast_dataitem_062_270_tData Item I062/270 - Target Size & Orientation
 Cast_dataitem_062_290_tData Item I062/290 - System Track Update Ages
 Cast_dataitem_062_295_tData Item I062/295 - Track Data Age
 Cast_dataitem_062_340_tData Item I062/340 - easured Information
 Cast_dataitem_062_380_tData Item I062/380 - Aircraft Derived Data
 Cast_dataitem_062_390_tData Item I062/390 - Flight Plan Related Data
 Cast_dataitem_062_500_tData Item I062/500 - Estimated Accuracies
 Cast_dataitem_062_510_tData Item I062/510 - Composed Track Number
 Cast_dataitem_065_020_tData Item I065/020 - Batch Number
 Cast_dataitem_065_040_tData Item I065/040 - SDPS Configuration and Status
 Cast_dataitem_240_020_tData Item I240/020 - Video Record Header
 Cast_dataitem_240_030_tData Item I240/030 - Video Summary
 Cast_dataitem_240_048_tData Item I240/048 - Video Cells Resolution & Data Compression Indicator
 Cast_dataitem_240_049_tData Item I240/049 - Video Octets & Video Cells Counters
 Cast_dataitem_240_050_tData Item I240/050 - Video Block Low Data Volume
 Cast_dataitem_240_051_tData Item I240/051 - Video Block Medium Data Volume
 Cast_dataitem_240_052_tData Item I240/052 - Video Block High Data Volume
 Cast_dataitem_aircraft_id_tData Item - Target Identification
 Cast_dataitem_data_source_identifier_tData Item - Data Source Identifier
 Cast_dataitem_ex_tExtracted dataitem
 Cast_dataitem_height_tData Item - Height
 Cast_dataitem_message_type_tData Item - Message Type
 Cast_dataitem_mode_3a_code_tData Item - Mode-3/A Code in Octal Representation
 Cast_dataitem_mode_3a_confidence_tData Item - Mode-3/A Code Confidence Indicator
 Cast_dataitem_mode_c_code_tData Item - Mode-C Code
 Cast_dataitem_mode_c_confidence_tData Item - Mode-C Code and Code Confidence Indicator
 Cast_dataitem_modes_mb_tData Item - Mode S MB Data
 Cast_dataitem_position_cartesian_tData Item - Position in Cartesian Coordinates
 Cast_dataitem_position_wgs84_low_tData Item - Position in WGS84 Coordinates (Low Reslution)
 Cast_dataitem_position_wgs84_tData Item - Position in WGS84 Coordinates
 Cast_dataitem_sector_number_tData Item - Sector Number
 Cast_dataitem_service_id_tData Item - Service Identification
 Cast_dataitem_signal_amplitude_tData Item - Signal Amplitude
 Cast_dataitem_subfields_tData Item - Subfields
 Cast_dataitem_tDataitem
 Cast_dataitem_target_address_tData Item - Target Address
 Cast_dataitem_target_id_tData Item - Target Identification
 Cast_dataitem_time_of_day_high_tData Item - Time of Day High Precision
 Cast_dataitem_time_of_day_tData Item - Time of Day
 Cast_dataitem_track_number_tData Item Itrack_number - Track Number
 Cast_dataitem_velocity_cartesian_tData Item - Calculated Track Velocity in Cartesian Coordinates
 Cast_dataitem_velocity_polar_tData Item - Calculated Track Track Velocity in Polar Co-ordinates
 Cast_dataitem_vertical_rate_tData Item - Vertical Rate
 Cast_dataitem_video_header_tData Item - Video Header
 Cast_datarecord_001_tData Record I001 - Monoradar Target Reports
 Cast_datarecord_002_tData Record I002 - Monoradar Service Messages
 Cast_datarecord_004_tData Record I004 - Safety Net Messages
 Cast_datarecord_020_tData Record I020 - MLT Messages
 Cast_datarecord_021_v026_tData Record I021 v0.26 - ADS-B Messages
 Cast_datarecord_021_v24_tData Record I021 v2.4 - ADS-B Target Reports
 Cast_datarecord_034_tData Record I034 - Transmission of Monoradar Service Messages
 Cast_datarecord_048_tData Record I048 - Transmission of Monoradar Target Reports
 Cast_datarecord_062_tData Record I062 - SDPS Track Messages
 Cast_datarecord_065_tData Record I065 - SDPS Service Status Messages
 Cast_datarecord_ex_tExtracted datarecord
 Cast_datarecord_modifier_tDatarecord modifier
 Cast_datarecord_tDatarecord
 Cast_deparr_time_t
 Cast_fspec_t
 Cast_heading_tHeading
 Cast_icaoaddr_tICAO 24-bit Address
 Cast_msgtype_t
 Cast_polar_coordinate_tPolar Coordinate
 Cast_sac_list_tSAC info listdefinition
 Cast_sac_tSAC info definition
 Cast_sacsic_tData Source Identifier (aka SAC/SIC)
 Cast_sensor_list_tSensor info listdefinition
 Cast_sensor_tSensor info definition
 Cast_speed_tSpeed
 Cast_squawk_tSquawk (aka Mode-3/A Code)
 Cast_subfield_tSubfield struct
 Cast_timeofday_tTime of day
 Cast_tracknum_tTrack Number
 Cast_uap_t
 Cast_videocell_tVideo cell
 Cast_videocells_tVideo cells
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