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  • CEOS Cal Val Test Site - Frenchman Flat, USA - Instrumented Site

    https://cmr.earthdata.nasa.gov/search/concepts/C1220566808-USGS_LTA.xml
    Description:

    On the background of these requirements for sensor calibration, intercalibration and product validation, the subgroup on Calibration and Validation of the Committee on Earth Observing System (CEOS) formulated the following recommendation during the plenary session held in China at the end of 2004, with the goal of setting-up and operating an internet based system to provide sensor data, protocols and guidelines for these purposes: Background: Reference Datasets are required to support the understanding of climate change and quality assure operational services by Earth Observing satellites. The data from different sensors and the resulting synergistic data products require a high level of accuracy that can only be obtained through continuous traceable calibration and validation activities. Requirement: Initiate an activity to document a reference methodology to predict Top of Atmosphere (TOA) radiance for which currently flying and planned wide swath sensors can be intercompared, i.e. define a standard for traceability. Also create and maintain a fully accessible web page containing, on an instrument basis, links to all instrument characteristics needed for intercomparisons as specified above, ideally in a common format. In addition, create and maintain a database (e.g. SADE) of instrument data for specific vicarious calibration sites, including site characteristics, in a common format. Each agency is responsible for providing data for their instruments in this common format. Recommendation : The required activities described above should be supported for an implementation period of two years and a maintenance period over two subsequent years. The CEOS should encourage a member agency to accept the lead role in supporting this activity. CEOS should request all member agencies to support this activity by providing appropriate information and data in a timely manner. Instrumented Sites: Frenchman Flat, USA is one of eight instrumented sites that are CEOS Reference Test Sites. The CEOS instrumented sites are provisionally being called LANDNET. These instrumented sites are primarily used for field campaigns to obtain radiometric gain, and these sites can serve as a focus for international efforts, facilitating traceability and inter-comparison to evaluate biases of in-flight and future instruments in a harmonized manner.  In the longer-term it is anticipated that these sites will all be fully automated and provide surface and atmospheric measurements to the WWW in an autonomous manner reducing some of the cost of a manned campaign, at present three can operate in this manner.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: 36.7 -115.9 36.9 -115.8

    USGS_LTA Short Name: CEOS_CalVal_Test_Site-Frenchman_Flat-USA Version ID: Not provided Unique ID: C1220566808-USGS_LTA

  • CEOS Cal Val Test Site - Ivanpah Playa, USA - Instrumented Site

    https://cmr.earthdata.nasa.gov/search/concepts/C1220566841-USGS_LTA.xml
    Description:

    On the background of these requirements for sensor calibration, intercalibration and product validation, the subgroup on Calibration and Validation of the Committee on Earth Observing System (CEOS) formulated the following recommendation during the plenary session held in China at the end of 2004, with the goal of setting-up and operating an internet based system to provide sensor data, protocols and guidelines for these purposes: Background: Reference Datasets are required to support the understanding of climate change and quality assure operational services by Earth Observing satellites. The data from different sensors and the resulting synergistic data products require a high level of accuracy that can only be obtained through continuous traceable calibration and validation activities. Requirement: Initiate an activity to document a reference methodology to predict Top of Atmosphere (TOA) radiance for which currently flying and planned wide swath sensors can be intercompared, i.e. define a standard for traceability. Also create and maintain a fully accessible web page containing, on an instrument basis, links to all instrument characteristics needed for intercomparisons as specified above, ideally in a common format. In addition, create and maintain a database (e.g. SADE) of instrument data for specific vicarious calibration sites, including site characteristics, in a common format. Each agency is responsible for providing data for their instruments in this common format. Recommendation : The required activities described above should be supported for an implementation period of two years and a maintenance period over two subsequent years. The CEOS should encourage a member agency to accept the lead role in supporting this activity. CEOS should request all member agencies to support this activity by providing appropriate information and data in a timely manner. Instrumented Sites: Ivanpah Playa, USA is one of eight instrumented sites that are CEOS Reference Test Sites. The CEOS instrumented sites are provisionally being called LANDNET. These instrumented sites are primarily used for field campaigns to obtain radiometric gain, and these sites can serve as a focus for international efforts, facilitating traceability and inter-comparison to evaluate biases of in-flight and future instruments in a harmonized manner.  In the longer-term it is anticipated that these sites will all be fully automated and provide surface and atmospheric measurements to the WWW in an autonomous manner reducing some of the cost of a manned campaign, at present three can operate in this manner.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: 35.45 -115.5 35.65 -115.3

    USGS_LTA Short Name: CEOS_CalVal_Test_Site-Ivanpah_Playa-USA Version ID: Not provided Unique ID: C1220566841-USGS_LTA

  • CEOS Cal Val Test Site - La Crau, France - Instrumented Site

    https://cmr.earthdata.nasa.gov/search/concepts/C1220566843-USGS_LTA.xml
    Description:

    On the background of these requirements for sensor calibration, intercalibration and product validation, the subgroup on Calibration and Validation of the Committee on Earth Observing System (CEOS) formulated the following recommendation during the plenary session held in China at the end of 2004, with the goal of setting-up and operating an internet based system to provide sensor data, protocols and guidelines for these purposes: Background: Reference Datasets are required to support the understanding of climate change and quality assure operational services by Earth Observing satellites. The data from different sensors and the resulting synergistic data products require a high level of accuracy that can only be obtained through continuous traceable calibration and validation activities. Requirement: Initiate an activity to document a reference methodology to predict Top of Atmosphere (TOA) radiance for which currently flying and planned wide swath sensors can be intercompared, i.e. define a standard for traceability. Also create and maintain a fully accessible web page containing, on an instrument basis, links to all instrument characteristics needed for intercomparisons as specified above, ideally in a common format. In addition, create and maintain a database (e.g. SADE) of instrument data for specific vicarious calibration sites, including site characteristics, in a common format. Each agency is responsible for providing data for their instruments in this common format. Recommendation : The required activities described above should be supported for an implementation period of two years and a maintenance period over two subsequent years. The CEOS should encourage a member agency to accept the lead role in supporting this activity. CEOS should request all member agencies to support this activity by providing appropriate information and data in a timely manner. Instrumented Sites: La Crau, France is one of eight instrumented sites that are CEOS Reference Test Sites. The CEOS instrumented sites are provisionally being called LANDNET. These instrumented sites are primarily used for field campaigns to obtain radiometric gain, and these sites can serve as a focus for international efforts, facilitating traceability and inter-comparison to evaluate biases of in-flight and future instruments in a harmonized manner.  In the longer-term it is anticipated that these sites will all be fully automated and provide surface and atmospheric measurements to the WWW in an autonomous manner reducing some of the cost of a manned campaign, at present three can operate in this manner.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: 41.86 1.92 45.63 6.49

    USGS_LTA Short Name: CEOS_CalVal_Test_Site-La_Crau-France Version ID: Not provided Unique ID: C1220566843-USGS_LTA

  • CEOS Cal Val Test Site - Libya 1 - Pseudo-Invariant Calibration Site (PICS)

    https://cmr.earthdata.nasa.gov/search/concepts/C1220566868-USGS_LTA.xml
    Description:

    On the background of these requirements for sensor calibration, intercalibration and product validation, the subgroup on Calibration and Validation of the Committee on Earth Observing System (CEOS) formulated the following recommendation during the plenary session held in China at the end of 2004, with the goal of setting-up and operating an internet based system to provide sensor data, protocols and guidelines for these purposes: Background: Reference Datasets are required to support the understanding of climate change and quality assure operational services by Earth Observing satellites. The data from different sensors and the resulting synergistic data products require a high level of accuracy that can only be obtained through continuous traceable calibration and validation activities. Requirement: Initiate an activity to document a reference methodology to predict Top of Atmosphere (TOA) radiance for which currently flying and planned wide swath sensors can be intercompared, i.e. define a standard for traceability. Also create and maintain a fully accessible web page containing, on an instrument basis, links to all instrument characteristics needed for intercomparisons as specified above, ideally in a common format. In addition, create and maintain a database (e.g. SADE) of instrument data for specific vicarious calibration sites, including site characteristics, in a common format. Each agency is responsible for providing data for their instruments in this common format. Recommendation : The required activities described above should be supported for an implementation period of two years and a maintenance period over two subsequent years. The CEOS should encourage a member agency to accept the lead role in supporting this activity. CEOS should request all member agencies to support this activity by providing appropriate information and data in a timely manner. Pseudo-Invariant Calibration Sites (PICS): Libya 4 is one of six CEOS reference Pseudo-Invariant Calibration Sites (PICS) that are CEOS Reference Test Sites. Besides the nominally good site characteristics (temporal stability, uniformity, homogeneity, etc.), these six PICS were selected by also taking into account their heritage and the large number of datasets from multiple instruments that already existed in the EO archives and the long history of characterization performed over these sites. The PICS have high reflectance and are usually made up of sand dunes with climatologically low aerosol loading and practically no vegetation. Consequently, these PICS can be used to evaluate the long-term stability of instrument and facilitate inter-comparison of multiple instruments.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: 23.44 12.19 25.76 14.83

    USGS_LTA Short Name: CEOS_CalVal_Test_Site-Libya1 Version ID: Not provided Unique ID: C1220566868-USGS_LTA

  • CEOS Cal Val Test Site - Mauritania 1 - Pseudo-Invariant Calibration Site (PICS)

    https://cmr.earthdata.nasa.gov/search/concepts/C1220566922-USGS_LTA.xml
    Description:

    On the background of these requirements for sensor calibration, intercalibration and product validation, the subgroup on Calibration and Validation of the Committee on Earth Observing System (CEOS) formulated the following recommendation during the plenary session held in China at the end of 2004, with the goal of setting-up and operating an internet based system to provide sensor data, protocols and guidelines for these purposes: Background: Reference Datasets are required to support the understanding of climate change and quality assure operational services by Earth Observing satellites. The data from different sensors and the resulting synergistic data products require a high level of accuracy that can only be obtained through continuous traceable calibration and validation activities. Requirement: Initiate an activity to document a reference methodology to predict Top of Atmosphere (TOA) radiance for which currently flying and planned wide swath sensors can be intercompared, i.e. define a standard for traceability. Also create and maintain a fully accessible web page containing, on an instrument basis, links to all instrument characteristics needed for intercomparisons as specified above, ideally in a common format. In addition, create and maintain a database (e.g. SADE) of instrument data for specific vicarious calibration sites, including site characteristics, in a common format. Each agency is responsible for providing data for their instruments in this common format. Recommendation : The required activities described above should be supported for an implementation period of two years and a maintenance period over two subsequent years. The CEOS should encourage a member agency to accept the lead role in supporting this activity. CEOS should request all member agencies to support this activity by providing appropriate information and data in a timely manner. Pseudo-Invariant Calibration Sites (PICS): Mauritania 1 is one of six CEOS reference Pseudo-Invariant Calibration Sites (PICS) that are CEOS Reference Test Sites. Besides the nominally good site characteristics (temporal stability, uniformity, homogeneity, etc.), these six PICS were selected by also taking into account their heritage and the large number of datasets from multiple instruments that already existed in the EO archives and the long history of characterization performed over these sites. The PICS have high reflectance and are usually made up of sand dunes with climatologically low aerosol loading and practically no vegetation. Consequently, these PICS can be used to evaluate the long-term stability of instrument and facilitate inter-comparison of multiple instruments.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: 17.74 -10.74 21.26 -7.9

    USGS_LTA Short Name: CEOS_CalVal_Test_Site-Mauritania1 Version ID: Not provided Unique ID: C1220566922-USGS_LTA

  • CEOS Cal Val Test Site - Mauritania 2 - Pseudo-Invariant Calibration Site (PICS)

    https://cmr.earthdata.nasa.gov/search/concepts/C1220566953-USGS_LTA.xml
    Description:

    On the background of these requirements for sensor calibration, intercalibration and product validation, the subgroup on Calibration and Validation of the Committee on Earth Observing System (CEOS) formulated the following recommendation during the plenary session held in China at the end of 2004, with the goal of setting-up and operating an internet based system to provide sensor data, protocols and guidelines for these purposes: Background: Reference Datasets are required to support the understanding of climate change and quality assure operational services by Earth Observing satellites. The data from different sensors and the resulting synergistic data products require a high level of accuracy that can only be obtained through continuous traceable calibration and validation activities. Requirement: Initiate an activity to document a reference methodology to predict Top of Atmosphere (TOA) radiance for which currently flying and planned wide swath sensors can be intercompared, i.e. define a standard for traceability. Also create and maintain a fully accessible web page containing, on an instrument basis, links to all instrument characteristics needed for intercomparisons as specified above, ideally in a common format. In addition, create and maintain a database (e.g. SADE) of instrument data for specific vicarious calibration sites, including site characteristics, in a common format. Each agency is responsible for providing data for their instruments in this common format. Recommendation : The required activities described above should be supported for an implementation period of two years and a maintenance period over two subsequent years. The CEOS should encourage a member agency to accept the lead role in supporting this activity. CEOS should request all member agencies to support this activity by providing appropriate information and data in a timely manner. Pseudo-Invariant Calibration Sites (PICS): Mauritania 2 is one of six CEOS reference Pseudo-Invariant Calibration Sites (PICS) that are CEOS Reference Test Sites. Besides the nominally good site characteristics (temporal stability, uniformity, homogeneity, etc.), these six PICS were selected by also taking into account their heritage and the large number of datasets from multiple instruments that already existed in the EO archives and the long history of characterization performed over these sites. The PICS have high reflectance and are usually made up of sand dunes with climatologically low aerosol loading and practically no vegetation. Consequently, these PICS can be used to evaluate the long-term stability of instrument and facilitate inter-comparison of multiple instruments.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: 18.92 -10.42 22.67 -7.52

    USGS_LTA Short Name: CEOS_CalVal_Test_Sites-Mauritania2 Version ID: Not provided Unique ID: C1220566953-USGS_LTA

  • CEOS Cal Val Test Site - Negev, Southern Israel - Instrumented Site

    https://cmr.earthdata.nasa.gov/search/concepts/C1220567024-USGS_LTA.xml
    Description:

    On the background of these requirements for sensor calibration, intercalibration and product validation, the subgroup on Calibration and Validation of the Committee on Earth Observing System (CEOS) formulated the following recommendation during the plenary session held in China at the end of 2004, with the goal of setting-up and operating an internet based system to provide sensor data, protocols and guidelines for these purposes: Background: Reference Datasets are required to support the understanding of climate change and quality assure operational services by Earth Observing satellites. The data from different sensors and the resulting synergistic data products require a high level of accuracy that can only be obtained through continuous traceable calibration and validation activities. Requirement: Initiate an activity to document a reference methodology to predict Top of Atmosphere (TOA) radiance for which currently flying and planned wide swath sensors can be intercompared, i.e. define a standard for traceability. Also create and maintain a fully accessible web page containing, on an instrument basis, links to all instrument characteristics needed for intercomparisons as specified above, ideally in a common format. In addition, create and maintain a database (e.g. SADE) of instrument data for specific vicarious calibration sites, including site characteristics, in a common format. Each agency is responsible for providing data for their instruments in this common format. Recommendation : The required activities described above should be supported for an implementation period of two years and a maintenance period over two subsequent years. The CEOS should encourage a member agency to accept the lead role in supporting this activity. CEOS should request all member agencies to support this activity by providing appropriate information and data in a timely manner. Instrumented Sites: Negev, Southern Israel is one of eight instrumented sites that are CEOS Reference Test Sites. The CEOS instrumented sites are provisionally being called LANDNET. These instrumented sites are primarily used for field campaigns to obtain radiometric gain, and these sites can serve as a focus for international efforts, facilitating traceability and inter-comparison to evaluate biases of in-flight and future instruments in a harmonized manner.  In the longer-term it is anticipated that these sites will all be fully automated and provide surface and atmospheric measurements to the WWW in an autonomous manner reducing some of the cost of a manned campaign, at present three can operate in this manner.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: 30 35 30.2 35.1

    USGS_LTA Short Name: CEOS_CalVal_Test_Site-Negev-Southern_Israel Version ID: Not provided Unique ID: C1220567024-USGS_LTA

  • CEOS Cal Val Test Site - Tuz Golu, Turkey - Instrumented Site

    https://cmr.earthdata.nasa.gov/search/concepts/C1220567092-USGS_LTA.xml
    Description:

    On the background of these requirements for sensor calibration, intercalibration and product validation, the subgroup on Calibration and Validation of the Committee on Earth Observing System (CEOS) formulated the following recommendation during the plenary session held in China at the end of 2004, with the goal of setting-up and operating an internet based system to provide sensor data, protocols and guidelines for these purposes: Background: Reference Datasets are required to support the understanding of climate change and quality assure operational services by Earth Observing satellites. The data from different sensors and the resulting synergistic data products require a high level of accuracy that can only be obtained through continuous traceable calibration and validation activities. Requirement: Initiate an activity to document a reference methodology to predict Top of Atmosphere (TOA) radiance for which currently flying and planned wide swath sensors can be intercompared, i.e. define a standard for traceability. Also create and maintain a fully accessible web page containing, on an instrument basis, links to all instrument characteristics needed for intercomparisons as specified above, ideally in a common format. In addition, create and maintain a database (e.g. SADE) of instrument data for specific vicarious calibration sites, including site characteristics, in a common format. Each agency is responsible for providing data for their instruments in this common format. Recommendation : The required activities described above should be supported for an implementation period of two years and a maintenance period over two subsequent years. The CEOS should encourage a member agency to accept the lead role in supporting this activity. CEOS should request all member agencies to support this activity by providing appropriate information and data in a timely manner. Instrumented Sites: Tuz Golu, Turkey is one of eight instrumented sites that are CEOS Reference Test Sites. The CEOS instrumented sites are provisionally being called LANDNET. These instrumented sites are primarily used for field campaigns to obtain radiometric gain, and these sites can serve as a focus for international efforts, facilitating traceability and inter-comparison to evaluate biases of in-flight and future instruments in a harmonized manner.  In the longer-term it is anticipated that these sites will all be fully automated and provide surface and atmospheric measurements to the WWW in an autonomous manner reducing some of the cost of a manned campaign, at present three can operate in this manner.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: 37.69 30.69 40 35.79

    USGS_LTA Short Name: CEOS_CalVal_Test_Site-Tuz_Golu-Turkey Version ID: Not provided Unique ID: C1220567092-USGS_LTA

  • Cloud and Ocean Remote Sensing Around Africa (CORSA) from the NOAA AVHRR Radiometer (GAC), 1981-1992, from SAI/JRC

    https://cmr.earthdata.nasa.gov/search/concepts/C1214155461-SCIOPS.xml
    Description:

    General information about NOAA-AVHRR can be queried by interested users in the category 'Sensor' and 'Source'. Some basic information is given hereafter. The Advanced Very High Resolution Radiometer (AVHRR) onboard NOAA 6 and TIROS-N measured in four spectral bands, while the NOAA 7, 9 and 11 are measured in 5 bands. The primary objective of the AVHRR instrument is to provide cloud top and sea surface temperatures through passively measured visible, near infra-red and infra-red spectral radiation bands. Nevertheless these data are widely used for terrestrial applications, such as land cover mapping and vegetation monitoring. The available data set provides a comprehensive time series of Sea Surface Temperature (SST) and different cloud parameters for the ocean surrounding the African continent derived from daytime NOAA GAC data. The total number of satellite passes is approximately 12000. The time period covered by the data set is from August 1981 to December 1992 with the intention to extend up to present (1995) as data will be purchased. Geographical coverage is from 45 S to 45 N and from 55 E to 30 W. Initially, emphasis has been put on SST for studying coastal upwelling processes in the Northwest African and Benguela upwelling systems in continuation of the SAI/JRC on-going activity on coastal upwelling research, Nykjaer and Van Camp (1994). In parallel, different studies are carried out for establishing algorithms for cloud optical properties and their validation. The elaboration of this data set is carried out in the frame of the Cloud and Ocean Remote Sensing around Africa project (CORSA). The five channels of the AVHRR are calibrated to 'top of atmosphere' reflectances for the channels 1 and 2 and brightness temperatures for channels 3, 4 and 5 following the recommendations of Kidwell (1991). Clouds over the ocean are identified using a modified Saunders and Kriebel (1988) approach. For cloud free areas SST is calculated using a classical 'split-window' algorithm from Castagne et al. (1986). After SST the individual images are resampled into weekly and monthly composites maintaining the original 4 km resolution. Validation of the SST fields are done by comparing to lower resolution data sets such as Comprehensive Ocean- Atmosphere Data Set (COADS), National Meteorological Center SST Data (IGOSS) and Global Ocean Surface Temperature Atlas (GOSTA). To accomodate the need for the reprocessing the data as algorithms evolve, all raw data have been written to an on-line optical file server system. In the processing, intermediate products are not stored but only the weekly and monthly composites are retained. This reduces the disk storage requirements for the user without sacrificing computational speed. Weekly and monthly composites of SST for one month, ca. 100 satellite passes, are generated in approximately 5 hours on a SUN Sparc 10 workstation. The weekly and monthly composites are stored on the on-line optical server and made available through collaborative agreements with the Joint Research Centre. Example SST time series can be found on the CEO World Wide Web home page: "http://www.ceo.org/".

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -45 -30 45 55

    SCIOPS Short Name: SAI_JRC-AVHRR_GAC_AFRICA_CLOUD Version ID: Not provided Unique ID: C1214155461-SCIOPS

  • Current Day, 7-Day, and 8-Day SST Observation Files from Ships and the NOAA TIROS/N Satellite Series

    https://cmr.earthdata.nasa.gov/search/concepts/C1214419900-SCIOPS.xml
    Description:

    The Current Day Observation file contains all SST observations (from any source, i.e. ship, satellite, etc.) which have been quality controlled. Use of these data should require no further quality control. With regards to satellite observations it's the final product. The file is guaranteed to contain all previous observations within the last 24 hours. Each observation stored will contain core information which will be the same regardless of the type or source of the observation. The core information consists of the type and source of observation, the time, and the location. Additional information may be appended to each observation, as a variable size record length is allowed. The observation should not exceed 120 bytes, of which the first 12 are of fixed format (i.e. contain the core information). The observation must be an even number of full words in length. Within the observation no odd full word may be negative (i.e. the type will always be large enough to set the sign bit for the first full word). The access routine COARX should be used to reference data in this data set. The data resolution is 1 X 1 degree latitude/longitude. The Current Day Observation file has overflow records and as such expands and decreases as data are available. Every day the observations are transferred to a seven day archive file and data over 24 hours old may be purged if the more recent data cannot fit on the primary track. Physical records are 1 track (13024 bytes) long as are logical records. The first record is a directory, containing the block directory. Each succeeding record contains a subdirectory followed by the observations. The 7-Day Observation file contains all the data that is normally contained in the current day file. Each observational unit is of fixed length (6 words) and is a truncated form of the current day of unit. The file holds all observation units for the previous 7 days. In wishing to access the immediate previous 7 days of data would find all non-archived observations in the current day file and refer to the 7 day file for the remaining data. The 7-Day Observation file is organized in approximately the same way as the current day observation file. It is recommended that the documentation be read first. The first record is a documentation and directory record (13030 bytes), which points to the location of the subblock directories. Each subblock begins on a new record (track), followed by the observations which contain without gaps across track boundaries. Subblocks will not cross track (record) boundaries. The 8-Day Observation file contains SST observations from the AVHRR and exist in an 8-day rotating file.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -90 -180 90 180

    SCIOPS Short Name: OSDPD0033_34_167 Version ID: Not provided Unique ID: C1214419900-SCIOPS