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GOES-R SERIES Advanced Baseline Imager (ABI) Instrument Calibration Data
The ABI Instrument Engineering Telemetry Data file contains data used to support the generation of ABI Level 1b products, and monitor and evaluate the health and performance of the instrument. This data is transmitted to the ground in raw digital counts, and subsequently converted into physical units by the ground system. Most of the data pertains to the temperature of components in the instrument. This includes the ABI Infrared Calibration Target (ICT), the North-South and East-West scan mirrors, the three focal plane modules (i.e., VNIR, MWIR, LWIR), and the ABI optical bench. Temperatures are expressed in units of kelvin. The only exception to this is the data for the twelve platinum resistance thermometers (PRTs) associated with the ICT. These data PRT data are expressed in counts. Table C.1, ABI Instrument Engineering Telemetry in Appendix C identifies each telemetry parameter. Elements of the instrument telemetry support the generation of the ABI Level 1b Radiances product data. The North-South scan mirror, the East-West scan mirror, and the PRT counts contribute to the computation of gain coefficients for detectors in the ABI emissive channels during observations of the ICT and the Space Look. Additionally, the scan mirror temperatures are used in support of determining the Earth scene radiances for the emissive bands. The ABI Instrument Calibration Data files contain data resulting from the observation of the ABI Space Look, Infrared Calibration Target (ICT) (i.e., blackbody), Star Look Target, and Solar Calibration Target (SCT) (i.e., solar look target). These observations are dependent on the ABI band and the individual detectors. The ABI Lunar Scan Data file contains an off-earth mesoscale scene, and is collected as part of an ABI mode 3 or mode 6 timeline when the moon is in the field of regard of the ABI instrument. The apparent size of the moon in the field of regard of the ABI subtends a size suitable for coverage using the ABI mesoscale scene type, which consists of two swaths. This data is collected for all ABI bands. Lunar scan data samples are radiometrically calibrated. The moon is observed in support of off-line ABI calibration activities.
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NOAA GOES-R Series Advanced Baseline Imager (ABI) Level 0 Data
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This data collection consists of archived Geostationary Operational Environmental Satellite-R (GOES-R) Series Advanced Baseline Imager (ABI) Level 0 data from the GOES-East and GOES-West satellites in the operational (OPS) and the post-launch test (PLT) phases. The GOES-R Series provides continuity of the GOES mission through 2035 and improvements in geostationary satellite observational data. GOES-16, the first GOES-R satellite, began operating as GOES-East on December 18, 2017. GOES-17 began operating as GOES-West on February 12, 2019. GOES-T launched on March 1, 2022, and was renamed to GOES-18 on March 14, 2022. GOES-U, the final satellite in the series, is scheduled to launch in 2024. ABI is a multi-channel passive imaging radiometer observing the Western Hemisphere. The ABI Level 0 data are composed of Consultative Committee for Space Data Systems (CCSDS) packets containing the science, housekeeping, engineering, and diagnostic telemetry data downlinked from the instrument. The Level 0 data files also contain orbit and attitude/angular rate packets generated by the GOES spacecraft. Each CCSDS packet contains a unique Application Process Identifier (APID) in the primary header that identifies the specific type of packet, and is used to support interpretation of its contents. Users may refer to the GOES-R Series Product Definition and Users’ Guide (PUG) Volume 1 (Main) and Volume 2 (Level 0 Products) for Level 0 data documentation. Related instrument calibration data and Level 1b processing information are archived and available for order at the NOAA CLASS website. The ABI Level 0 data files are delivered in a netCDF-4 file format, however, the constituent CCSDS packets are stored in a byte array making the data opaque for standard netCDF reader applications. The ABI Level 0 data files are packaged in hourly tar files (data bundles) by satellite for the archive. Recently ingested archive tar files are available for 14 days on an anonymous FTP server for users to download. Data archived on offline tape may be requested from NCEI.
NOAA GOES-R Series Advanced Baseline Imager (ABI) Level 2 Land Surface Albedo (LSA)
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The GOES-R Advanced Baseline Imager (ABI) Level 2 Land Surface Albedo (LSA) as defined as the ratio between outgoing and incoming irradiance at the earth's surface. The LSA is a shortwave broadband blue-sky albedo over wavelengths between 0.4 and 3.0 µm. Besides the blue-sky broadband shortwave albedo, the LSA algorithm also generates spectral land surface reflectance as byproducts. The frequent temporal refreshment, fine spectral resolution and large spatial coverage make ABI a unique data source for mapping LSA. The Land Surface Albedo product image is provided at 2 km resolution on the ABI fixed grid for Full Disk, CONUS, and Mesoscale coverage regions from GOES East and West.
GOES-R Series Satellite Instrument Calibration Ephemeris Data
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The Geostationary Operational Environmental Satellite-R Series (GOES-R), the latest generation of geostationary weather satellites, significantly improves the detection and observation of environmental phenomena, resulting in improved public safety, more accurate forecasts, better protection of property, and greater assurance on our nation's economic health and prosperity. The satellites provide advanced imaging with increased spatial resolution and faster coverage for more accurate forecasts, real-time mapping of lightning activity, and improved monitoring of solar activity and space weather. The GOES-R Series is a four-satellite program (GOES-R/S/T/U) that will extend the availability of the operational GOES satellite system through 2036.
NOAA GOES-R Series Space Environment In-Situ Suite (SEISS) Instrument Calibration Data
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The Space Environment In-Situ Suite (SEISS) Instrument Engineering Telemetry Data file contains data used to monitor and evaluate the health and performance of the sensor suite. This data is transmitted to the ground in raw digital counts, and subsequently converted into physical units by the ground system. All the data pertains to the temperature of components in the sensor suite. Primarily, this includes temperatures for the telescopes and other sensing components. The SEISS Calibration Data file contains data used to support the generation of EHIS, MPS-LO, MPS-HI, and SGPS Level 1b products, and monitor and evaluate the health and performance of the sensor suite. This file contains derived level 1b calibration parameters including raw sensor count rates, valid raw sensor count data percentages, and dead-time and contamination correction factors needed for the production of all the SEISS products.
NOAA GOES-R Series Space Environment In-Situ Suite (SEISS) Instrument Calibration Data
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The Space Environment In-Situ Suite (SEISS) Instrument Engineering Telemetry Data file contains data used to monitor and evaluate the health and performance of the sensor suite. This data is transmitted to the ground in raw digital counts, and subsequently converted into physical units by the ground system. All the data pertains to the temperature of components in the sensor suite. Primarily, this includes temperatures for the telescopes and other sensing components. The SEISS Calibration Data file contains data used to support the generation of EHIS, MPS-LO, MPS-HI, and SGPS Level 1b products, and monitor and evaluate the health and performance of the sensor suite. This file contains derived level 1b calibration parameters including raw sensor count rates, valid raw sensor count data percentages, and dead-time and contamination correction factors needed for the production of all the SEISS products.
NOAA GOES-R Series Solar Ultraviolet Imager (SUVI) Instrument Calibration Data
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The Solar Ultraviolet Imager (SUVI) Instrument Engineering Telemetry Data file contains data used to support the generation of SUVI Level 1b products, and monitor and evaluate the health and performance of the instrument. This data is transmitted to the ground in raw digital counts, and subsequently converted into physical units by the ground system. Most of the data pertains to the temperature of components in the instrument. This includes temperatures for the guide telescope, door mechanism, supporting structure, shutter, aperture, filter wheels, mirrors, electronics, and CCD. CCD bias voltages are also included. The SUVI Dark Frame Data file contains an image produced by the SUVI with the camera’s shutter closed. A dark frame measures the inherent bias and noise in the camera electronics, and is used to identify, track, and monitor permanently bad pixels. Dark frames are collected in the operational imaging epoch of the SUVI, and support the radiometric correction of the solar imagery products. Up to ten dark frames are used to support of radiometrically correcting individual solar images. The SUVI Miscellaneous Frame Data file contains a special image produced by the SUVI to support several calibration related activities. Specific types of images include glass, flat-field, and light transfer curve.
NOAA GOES-R Series Advanced Baseline Imager (ABI) Level 2 Land Surface Bidirectional Reflectance Factor (BRF)
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The GOES-R Advanced Baseline Imager (ABI) Level 2 Bidirectional Reflectance Factor (BRF) products provide spectral land surface reflectance, i.e., a ratio between outgoing radiance at one given direction and incoming radiance at another given direction (same or different from the incoming direction). In this product, the outgoing direction is the direction of the satellite view, while the incoming direction is the direction of solar illumination. The BRF is produced at the following wavelengths: 0.47 µm, 0.64 µm, 0.86 µm, 1.61 µm, and 2.26 µm, corresponding to bands 1, 2, 3, 5, 6. The product includes associated data quality flags and percentage of each flag value, mean, maximum, minimum, and standard deviation of BRF of each band. The ABI BRF provides spatial and temporal continuous surface reflectance information. The product image is provided at 2 km resolution on the ABI fixed grid for Full Disk, CONUS, and Mesoscale coverage regions from GOES East and West.
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