Dataset Title Global climatological dataset derived from microwave radiometer satellites
Dataset Purpose The Advanced Microwave Sounding Unit (AMSU-A), a 15-channel microwave sounder designed primarily to obtain temperature profiles in the upper atmosphere (especially the stratosphere) and to provide a cloud-filtering capability for tropospheric temperature observations. The Advanced Microwave Sounding Unit-B (AMSU-B) is a 5 channel microwave radiometer. The purpose of the instrument is to receive and measure radiation from a number of different layers of the atmosphere in order to obtain global data of precipitation and convection detection. It works in conjunction with the AMSU-A instruments to provide a 20 channel microwave radiometer. The Microwave Humidity Sounder (MHS) together with the complementary AMSU-A instruments, provides the operational microwave sounding capability for the NOAA-18 and 19 meteorological satellites.
Dataset Abstract The AMSU-A dataset comprises vertical stratospheric profiles of brightness temperature, while the AMSU-B dataset consists of global data of precipitation and convection detection, both of them from 1998. The MHS (since 20 May 2005) provides humidity profiles and information on surface temperature and emissivity (in conjunction with AMSU-A channels) and detects cloud and precipitation contaminated pixels. The MHS instrument represents an improvement to the AMSU-B radiometer on board previous NOAA satellites, while providing continuity to its data. METOP-C (MHS) will be the next generation of European satellites (2016) and The Advanced Technology Microwave Sounder (ATMS) on board NASA's newest Earth-observing satellite, NPP, acquired its first measurements on November 8, 2011.
Acquisition Methodology The spectrometer is a cross-scanning microwave instrument that is composed of 15 channels between 50 and 58 GHz in the oxygen band, which allows the observation of the temperature structure of the atmosphere from the surface to around 50 km. AMSU-B/MHS moisture channels (3 to 5) detect the presence of hydrometeors through the scattering of radiation, which lowers the brightness temperature compared to its surroundings. Based on this property, combining channels 3 and 5 of AMSU-5 precipitation areas are detected. Areas of deep convection are detected using a criterion initially devised to identify convection in the tropical regions. For the polar regions, because it is colder and drier, the channel convention used for the tropics and Mediterranean areas is not valid. Therefore other channels need to be used for the detection of precipitation and deep convection (channel 4)
Quality There are no specific on-orbit calibration procedures for AMSU-A; the instrument is automatically calibrated each data cycle by measuring both warm and cold calibration targets. AMSU-B data is calibrated. After December 2007 NOAA-15 observations are not used, due to scan asymmetry issues especially for channel 4, which may affect deep convection determination. Also NOAA-16 measurements after December 2007 are ignored due to a residual uncorrected radio-frequency interference and asymmetry problem. For the case of MHS, it is a self-calibrating microwave radiometer.
Dataset DOI
Access Constraints AMSU-A level 1C, AMSU-B and MHS data are available for all ICARE registered users. AMSU-A (level B and C), AMSU-B and MHS are also available through ClimServ (Service de donnes et de calcul de L'IPSL).
Use Constraints Raw data like brightness temperature can be used without any constrains. Higher level data, like DC (Deep Convection) or rain occurrence, need to contact the Principal investigator.
Keywords AMSU, MHS, global, microwave radiometers, satellites, climatology data, atmosphere
Status In work
Temporal Coverage
Start Date 1998-11-24
Stop Date
Project 0
Project short Name NOAA
Project long Name National Oceanic and Atmospheric Administration
URL http://www.noaa.gov/
Description NOAA is an agency that enriches life through science. Our reach goes from the surface of the sun to the depths of the ocean floor as we work to keep citizens informed of the changing environment around them.
URL Type VIEW PROJECT HOME PAGE
Contact 0
Role Investigator
Full Name Claud Chantal
Email claud@lmd.polytechnique.fr
Phone +33 (0)169335129  
Fax
Organism short Name LMD
Organism long Name Laboratoire de Météorologie Dynamique
URL http://www.lmd.jussieu.fr/
Description LMD studies climate, pollution and planetary atmospheres by combining theoretical approaches, instrumental developments for observation and numerical modeling. It is at the forefront of research on the dynamical and physical processes for the study of the evolution and the prediction of weather and climate.
URL Type VIEW PROFESSIONAL HOME PAGE
Address (Line1) Ecole Polytechnique, site de Palaiseau, Route de Saclay,
Address (Line2)
City Palaiseau
Postal Code 91128
Country France
Parameter 0
Category EARTH SCIENCE/ATMOSPHERE/PRECIPITATION/RAIN
Parameter Relative deep convection frequency (DC)
Units per mille (‰: 1/1000)
Parameter 1
Category EARTH SCIENCE/ATMOSPHERE/PRECIPITATION/RAIN
Parameter Relative precipitation frequency
Units per mille (‰: 1/1000)
Parameter 2
Category EARTH SCIENCE/SPECTRAL/MICROWAVE RADIANCE
Parameter Calibrated radiances-Level 1B (radiances)
Units watts per steradian per cubic meter (W/sr m3)
Parameter 3
Category EARTH SCIENCE/SPECTRAL/INFRARED WAVELENGTHS/BRIGHTNESS TEMPERATURE
Parameter Brightness temperatures (BT)
Units kelvin (K)
Datacenter short Name ICARE
Datacenter long Name Cloud-Aerosol-Water-Radiation Interactions Thematic Center
Address (Line1) Polytech'Lille - Bâtiment Eydoux - Bureau E207
Address (Line2)
City Villeneuve d'Ascq CEDEX
Postal Code 59650
Country France
URL http://www.icare.univ-lille1.fr
Description The ICARE Thematic Center was created in 2003 by CNES, CNRS, the Nord-Pas-De-Calais Regional Council, and the University of Lille, to provide various services to support the research community in fields related to atmospheric research, such as aerosols, clouds, radiation, water cycle, and their interactions.
URL Type VIEW PROFESSIONAL HOME PAGE
Reference 0
Reference Title A high resolution climatology of precipitation and deep convection over the Mediterranean region from operational satellite microwave data: development and application to the evaluation of model
Authors Claud C., B. Alhammoud, B. M. Funatsu, C. Lebeaupin Brossier, J.-P. Chaboureau, K. Beranger, and P. Drobinski
Publication Date 2012-03-23
Series
Edition
Volume 12
Issue
Report_number
Publication Place
Publisher Natural Hazards and Earth System Sciences
Pages 785-798
ISBN
DOI 10.5194/nhess-12-785-2012
Other reference details
URL
Description
URL Type
Reference 1
Reference Title Cross-validation of Advanced Microwave Sounding Unit and lidar for long-term upper-stratospheric temperature monitoring
Authors Funatsu, B. M., C. Claud, P. Keckhut, and A. Hauchecorne 
Publication Date 2014-08-11
Series
Edition
Volume 113
Issue D23108
Report_number
Publication Place
Publisher Journal of Geophysical Research
Pages
ISBN
DOI 10.1029/2008JD010743
Other reference details
URL
Description
URL Type
Reference 2
Reference Title Tidal effects on stratospheric temperature series derived from successive advanced microwave sounding units
Authors Keckhut P., B. M. Funatsu, C. Claud A. and Hauchecorne
Publication Date 2014-05-27
Series
Edition
Volume
Issue
Report_number
Publication Place
Publisher Quarterly Journal of the Royal Meteorological Society
Pages
ISBN
DOI 10.1002/qj.2368
Other reference details
URL
Description
URL Type
Multimedia AMSU-A Stratospheric temperature observations in the Arctic
Caption AMSU-A Stratospheric temperature observations in the Arctic
Description Long term temperature observations and trends [60-80°N] based on SSU (Stratospheric Sounding Unit) and AMSU-A observations. Cooling trend is observed in the whole depth of the stratosphere. Major Sudden Stratospheric Warmings (arrows) were nearly absent during the 90s, and have occurred nearly every other year since late 90s.
Distribution Format hdf
Media fttp
Size
Fees No fees
Data Resolution
Latitude Resolution
Longitude Resolution
Horizontal Resolution Range From 16 to 50 km at nadir depending on the radiometer (swath 1650 km)
Vertical Resolution
Vertical Resolution Range
Temporal Resolution Daily (2/day during 1999, after 2002 average 6/day)
Temporal Resolution Range
Instrument 0
Site Name
Location GLOBAL
Detailed Location
Site Longitude
Site Latitude
Site Altitude
Site Depth
Platform short Name
Platform long Name METOP
Instrument short Name AMSU-A
Instrument long Name Advanced Microwave Sounding Unit-A
Instrument Longitude
Instrument Latitude
Network Lons/Lats (Format : lon0 lat0, Lon1 Lat1, ...)
Instrument Altitude
Instrument Depth
Instrument Description
Instrument 1
Site Name Global
Location
Detailed Location
Site Longitude
Site Latitude
Site Altitude
Site Depth
Platform short Name NOAA POES
Platform long Name NOAA Polar Orbiting Environmental Satellites
Instrument short Name MHS
Instrument long Name Microwave Humidity Sounder
Instrument Longitude
Instrument Latitude
Network Lons/Lats (Format : lon0 lat0, Lon1 Lat1, ...)
Instrument Altitude
Instrument Depth
Instrument Description MHS was on board NOAA-18 and 19
Instrument 2
Site Name Global
Location
Detailed Location
Site Longitude
Site Latitude
Site Altitude
Site Depth
Platform short Name NOAA POES
Platform long Name NOAA Polar Orbiting Environmental Satellites
Instrument short Name AMSU-B
Instrument long Name Advanced Microwave Sounding Unit-B
Instrument Longitude
Instrument Latitude
Network Lons/Lats (Format : lon0 lat0, Lon1 Lat1, ...)
Instrument Altitude
Instrument Depth
Instrument Description AMSU-B was on board NOAA-15, 16 and 17
Instrument 3
Site Name Global
Location
Detailed Location
Site Longitude
Site Latitude
Site Altitude
Site Depth
Platform short Name
Platform long Name METOP
Instrument short Name MHS
Instrument long Name Microwave Humidity Sounder
Instrument Longitude
Instrument Latitude
Network Lons/Lats (Format : lon0 lat0, Lon1 Lat1, ...)
Instrument Altitude
Instrument Depth
Instrument Description MHS was on board METOP-A and METOP-B. The MHS observes the Earth with a field of view of ±50 degrees across nadir, in five frequency channels of the millimeter-wave band (89-190 GHz). Channels at 157 GHz and around the 183 GHz water vapor absorption line provide a humidity profile sounding capability, while the 89 GHz channel provides information on surface temperature and emissivity (in conjunction with AMSU-A channels) and detects cloud and precipitation contaminated pixels.
Instrument 4
Site Name Global
Location
Detailed Location
Site Longitude
Site Latitude
Site Altitude
Site Depth
Platform short Name
Platform long Name METOP
Instrument short Name AMSU-B
Instrument long Name Advanced Microwave Sounding Unit-B
Instrument Longitude
Instrument Latitude
Network Lons/Lats (Format : lon0 lat0, Lon1 Lat1, ...)
Instrument Altitude
Instrument Depth
Instrument Description AMSU-B was on board METOP-A and METOP-B
Spatial Coverage
Southern latitude -90 degrees
Northern latitude 90 degrees
Western longitude -180 degrees
Eastern longitude 180 degrees
Minimum Altitude 0 km
Maximum Altitude 45 km
Minimum depth
Maximum depth
Paleo Temporal Coverage
Paleo Start Date
Paleo Stop Date
Eon
Era
Period
Epoch
Stage