Description:

The AMSU/MSU Lowstratosphere Day/Month Temperature Anomalies and Annual Cycle V6 dataset consists of temperature anomalies and annual cycle temperatures derived from the Microwave Sounding Unit (MSU) and the Advanced Microwave Sounding Unit-A (AMSU-A) radiance data since January 1978. All products are derived for the lower stratosphere. The dataset begins on January 1, 1978 and is still currently ongoing. The data are available in netCDF-4 and ASCII formats.

Links:

• Data link
• Metadata link
• Metadata link
• Metadata link
• Metadata link

Temporal Extent:

Start: 1978-01-01T00:00:00.000Z

Spatial Extent:

Minimum Bounding Rectangle: -90 -180 90 180

GHRC_DAAC Short Name: msutls Version ID: 6 Unique ID: C1996545162-GHRC_DAAC

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Description:

The AMSU/MSU Midtroposphere Day/Month Temperature Anomalies and Annual Cycle V6 dataset consists of temperature anomalies and annual cycle temperatures derived from the Microwave Sounding Unit (MSU) and the Advanced Microwave Sounding Unit-A (AMSU-A) radiance data since January 1978. All products are derived for the mid-troposphere. The dataset begins on January 1, 1978 and is still currently ongoing. The data are available in netCDF-4 and ASCII formats.

Links:

• Data link
• Metadata link
• Metadata link
• Metadata link
• Metadata link

Temporal Extent:

Start: 1978-01-01T00:00:00.000Z

Spatial Extent:

Minimum Bounding Rectangle: -90 -180 90 180

GHRC_DAAC Short Name: msutmt Version ID: 6 Unique ID: C1996545587-GHRC_DAAC

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Description:

AVHRR HRPT level 0 raw telemetry data are acquired at the Arctic and Antarctic Research Center (AARC) on selective passes by satellite receivers located at McMurdo Station, Antarctica (77 degrees, 51 minutes S, 166 degrees, 40 minutes E.) and Palmer Station, Antarctic Peninsula (64 degrees, 46 minutes S, 64 degrees, 4 minutes W.) Generally, most of the Antarctic continent and its coastline are covered daily. Swaths are 2250 kilometers long and generally start or end over the extreme South Pacific Ocean adjacent to the Ross Sea. Data collection from Palmer Station covers the land areas of West Antarctica, Southern South America, the South Atlantic including the Falkland Islands and the South Orkney Islands, and the Drake Passage and portions of the South Pacific Ocean. Continuous data collection at the McMurdo Station began on 26 October 1987. Data are also archived for 30 October 1985 - 2 December 1985 and for 30 October 1986 - 30 January 1987. Continuous data collection began at the Palmer Station 3 August 1989. The data resolution is 1100 meters at subtrack, 4000 - 6000 meters at limb; 360 scans per minute. Satellite revisit time is twice daily, however, due to the proximity to the South Pole, 14 passes a day are received at McMurdo and 10 passes a day are received at Palmer from each spacecraft. Data are acquired, archived, processed for requesters, and distributed by the Arctic & Antarctic Research Center (AARC). Processing of the raw data will depend on the requirements of the requester, but a typical sequence might be as follows: + Reformat raw data for extraction; up to 10 missing scan lines can be interpolated by the software. + Calibrate the reformatted data to convert from brightness values to temperature values. + Apply the moisture/atmospheric correction. + Register selected data to the user-specified grid. + Transfer to user-specified medium. Some examples are tape, diskette, photographic product, or file format for electronic transfer. About 95 percent of the presently archived data have been cataloged on our online directory. Data dropouts, caused by transmission interference due to solar flare activity, occur in some images; the processing software can smooth the data if fewer than 10 scan lines are missing. All archived images contain usable data. Processed data are binary byte arrays of user-defined size. Full spacecraft attitude correction and earth correction routines are applied to the raw data to create the products. Orbital elements, equator crossings, altitude and period of the spacecraft are generated for the raw data using the AARC scientific workstation. Data products can be gridded to a user-specified grid. Data are also available in raw form (10 bits of information stored in a 16 bit word) on 4mm DDS2 or DDS3 DAT cassettes or DLT7000 tapes. Users would need access to an 4mm DAT or DLT7000 reader. An alternative method to access the digital archive is to use the Sun Workstations located at the AARC, Scripps Institution of Oceanography. AARC personnel can be contacted for access information.

Links:

• FE09004A

Temporal Extent:

Start: 1987-10-26T00:00:00.000Z

Spatial Extent:

Minimum Bounding Rectangle: -90 -180 -50 180

SCIOPS Short Name: FE09004A Version ID: Not provided Unique ID: C1214584927-SCIOPS

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): Algeria 3 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:

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• undefined

Temporal Extent:

Start: 1972-08-11T00:00:00.000Z

Spatial Extent:

Minimum Bounding Rectangle: 29.09 5.22 31.36 10.01

USGS_LTA Short Name: CEOS_CalVal_Test_Sites-Algeria3 Version ID: Not provided Unique ID: C1220567099-USGS_LTA

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: Dome C, Antarctica 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:

• undefined
• undefined

Temporal Extent:

Start: 1972-12-06T00:00:00.000Z

Spatial Extent:

Minimum Bounding Rectangle: -76.6 123 -74.5 131.18

USGS_LTA Short Name: CEOS_CalVal_Test_Site-Dome_C-Antarctica Version ID: Not provided Unique ID: C1220566821-USGS_LTA