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DVB-S2 Transmission CADU Stream Generation AOS Space Packets GOES-R User Data Types and Structures Andrew Royle GOES-R Ground Segment Project NASA Goddard.

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Presentation on theme: "DVB-S2 Transmission CADU Stream Generation AOS Space Packets GOES-R User Data Types and Structures Andrew Royle GOES-R Ground Segment Project NASA Goddard."— Presentation transcript:

1 DVB-S2 Transmission CADU Stream Generation AOS Space Packets GOES-R User Data Types and Structures Andrew Royle GOES-R Ground Segment Project NASA Goddard Space Flight Center Presentation #IN41B-1498 Network Common Data Format (NetCDF4) forms a standard underlying structure for all GOES-R data products GOES Rebroadcast (GRB) provides near real-time data to users via satellite downlink from GOES-R Series spacecraft National Weather Service receives L2+ sectorized cloud and moisture imagery via the Advanced Weather Interactive Processing System (AWIPS) NOAAS Comprehensive Large Array-Data Stewardship System (CLASS) enables archive of GOES-R data for retrieval and retrospective analysis Authorized users subscribe to or conduct ad hoc searches for GOES-R end products through the Environmental Satellite Processing and Distribution System (ESPDS) Product Distribution and Access (PDA) capability GOES Rebroadcast Characteristics 31Mbps of Level 1b (L1b) data from all GOES-R instruments New types of data (lightning, space weather, additional imager bands) Increased spatial and temporal resolution Data formatted into NetCDF4 GRB Information Packets sent every 5 minutes and include schedule, operational status, INR, and other information relevant to the user community Current GOES GVARGOES Rebroadcast (GRB) Full Disk Image30 minutes5 minutes (Mode 4) 15 min (Mode 3) Other modesRapid Scan, Super Rapid Scan 3000 km x 5000 km CONUS: 5 min 1000 km x 1000 km Mesoscale: 30 sec PolarizationNoneDual circular polarized Receive Frequency MHz (L-band) MHz (L-band) PacketizationGVAR BlocksCCSDS B-1 Data CompressionNoneLossless compression Data Rate2.11 Mbps~31 Mbps Antenna CoverageEarth coverage to 5° Data SourcesImager and SounderABI (16 bands), GLM, SEISS, EXIS, SUVI, MAG Space WeatherNone~2 Mbps Lightning DataNone~0.5 Mbps AWIPS Data and Interface Characteristics Low latency data delivered directly to NWS via dedicated interface Configurable based on selected parameters (bit depth, projection, geographic coordinates, periodicity, and spatial resolution) Data transferred in tiles which are individual netCDF4 files that together comprise the entire end product CCSDS Space Packets GRB Data GRB Hdr CCSDS Hdr CLASS Data and Interface Characteristics Long-term archive for GOES-R data Unique source of certain GOES-R data types (L0 data, algorithm packages) Data is sent to CLASS Receipt Nodes at each GOES-R facility and is then ingested and maintained by NOAAs National Climatic Data Center (NCDC) and National Geophysical Data Center (NGDC) GOES-R data and metadata characteristics are documented in: GOES-R Product Definition and Users Guide Separate volumes for L0, L1b, GRB, and L2+ Ground Segment Interface Control Documents for AWIPS, CLASS, and PDA GOES-R Metadata Model GRB Downlink Specification for Users See for further details and to obtain copies of selected GOES-R documentationwww.goes-r.gov Data TypeData Format Product Data Elements Level 0 Data CCSDS in NetCDF4 Level 1b DataNetCDF4 Level 2+ DataNetCDF4 Non-Product Data Elements Ancillary DataNative Format L0 Instrument Calibration DataNetCDF4 L1b Instrument Calibration DataBinary L1b Processing ParametersBinary L2+ Processing Parameters.zip files Algorithm Packages.zip files GRB Information PacketsXML ISO Series Level MetadataXML Delivery Notifications Submission Manifest FilesXML File Activity ReportsXML Manifest Activity ReportsXML Error NotificationsSOAP message Data is sent from GOES-R to CLASS Receipt Nodes at each GS facility L1b and L2+ GOES-R Products available through PDA (and CLASS) GOES-R GS Product Distribution CDR PDA Data and Interface Characteristics Subscription and ad hoc query service available to registered users Provides most recent seven days of data for ad hoc queries and retrieval Primary distribution pathway for L2+ end-products other than Cloud and Moisture Imagery Products sent from GOES-R in NetCDF4; PDA has McIDAS translation capability PDA Interface Characteristics Low latency distribution for all GOES-R End Products Subscription and ad hoc query capability Application Programming Interface for users Limited to authorized NOAA users Data in NetCDF format; translation capability to McIDAS # # Also distributed from PDA in FITS format GRB Block (compressed) GRB Data GRB Hdr CCSDS Hdr L1b ABI Block Decompression GRB Block (compressed) GLM, SEISS, SUVI, MAG, EXIS data (each separately delivered) NetCDF Files L1b ABI Block NetCDF Files NetCDF4 Characteristics Machine-independent format for representing science data in an array structure Self-describing format enabling user-defined data types Appendable to include metadata alongside science data Built-in zlib algorithm enables compression transparent to user NetCDF4 enables use of HDF5 data format More information on NetCDF4 available at: Unidata NetCDF4 Data Model Current GOES satellites switch to geographically constrained modes of operation to cover storms such as 2012s Hurricane Sandy. GOES-R Series satellites will be able to provide 1000 x 1000 km images every 30 seconds while maintaining routine scanning schedules GOES-R Series satellites will carry a series of advanced space weather instruments capable of generating solar imagery such as the above, from NASAs Solar Dynamic Observatory (SDO) Credit: NASA Colors correspond to GOES-R instruments Wallops Command and Data Acquisition Station, Wallops VA Remote Backup, Fairmont WV NOAA Satellite Operations Facility, Suitland MD National Climatic Data Center, Asheville NC National Geophysical Data Center, Boulder CO L2+ Products (other than KPP and GLM) L0, L1b, L2+ KPP & GLM products GRB Info Pkts Inst. Cal. Data CLASS Receipt Nodes (at each facility) CLASS Nodes NOAA Satellite Operations Facility, Suitland MD AWIPS Product Metadata Data source Channel ID Satellite ID Latitude/Longitude Map Projection Type Bit Depth Spatial Resolution Observation Time Projection-specific Metadata Position within End Product File (specific to tile-files) GRB Product Metadata Contained in NetCDF Markup Language (NcML) files Instrument specific ABI metadata includes Projection type, time, coordinates, scaling, and per- pixel data quality flag images GLM metadata includes the numbers of events, groups, and flashes; their locations, time, intensity, and size; and data quality information Wallops Command and Data Acquisition Station, Wallops VA Remote Backup, Fairmont WV AWIPS Network Control Facility, Silver Spring MD AWIPS Backup Network Control Facility, Fairmont, WV Distributed to NWS field offices via AWIPS OC-3 (155 Mbps) per line


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