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Server Details >
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Url: http://g0hep12u.ecs.nasa.gov/mapserv-bin/wms_ogc?
WMS Version: 1.1.1
Layers: 89
Formats: image/jpg,image/png,image/gif,image/png; mode=24bit,image/wbmp,image/tiff
Abstract:
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GES_DISC_WMS
OGC WMS Server
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TRMM_3A11_MONTHLY
TRMM_3A11_MONTHLY
Algorithm 3A11 estimates monthly rain from the histogram of t...
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Algorithm 3A11 estimates monthly rain from the histogram of the brightness temperatures obtained from TMI calibration (1B11). This histogram is matched to a log-normally distributed rain rate distribution via a rain rate-brightness temperature relation. A beam-filling correction is applied to account for the non-uniformly filled field-of-view of the TMI sensor. Outputs are monthly surface rain rates and freezing heights for 5° x 5° grid boxes.
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TRMM_3A12_V6_MONTHLY_surfrain
TRMM_3A12_V6_MONTHLY_surfrain
This document provides basic information on 3A12, TMI Monthly...
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This document provides basic information on 3A12, TMI Monthly 0.5° x 0.5° Profiling. Algorithm 3A12 produces global 0.5° x 0.5° monthly gridded means using 2A12 data. Vertical hydrometeor profiles and surface rainfall means are computed. Various pixel counts are also reported. The granule size is one month.This document provides basic information on 3A12, TMI Monthly 0.5° x 0.5° Profiling. Algorithm 3A12 produces global 0.5° x 0.5° monthly gridded means using 2A12 data. Vertical hydrometeor profiles and surface rainfall means are computed. Various pixel counts are also reported. The granule size is one month.
The average operating altitude for TRMM was changed from 350 to 403 km
during the period of August 7-24, 2001. This orbit boost maneuver
extended the mission life significantly. All post-boost data products
had been released by the TRMM Science Project, as of early December
2001. All TRMM data products (post- and pre-boost) are available via
the TRMM data search-and-order system at
http://disc.gsfc.nasa.gov/data/datapool/TRMM_DP/01_Data_Products/02_Gridded/. The time period before
August 7, 2001 is referred to as pre-boost, and the time period after
August 24, 2001 is referred to as post-boost.
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TRMM_3A25_V6_MONTHLY_surfrain
TRMM_3A25_V6_MONTHLY_surfrain
The primary objective of algorithm 3A25 is to compute various...
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The primary objective of algorithm 3A25 is to compute various rainfall
statistics over a month from the level 2 PR products. The statistics
are derived at two spatial resolutions: (1) a standard space scale of
5 degrees by 5 degrees (latitude x longitude) cells and (2) a high
resolution subset of 0.5 degree x 0.5 degree cells.
The output variables include rainfall rate (mm/hour) profile at 2, 4,
6, 10, and 15 km, fractional rain, snow ice layer, and surface rain
rate (mm/hour). The output statistics include probabilities of
occurrence, means and standard deviations, histograms, and correlation
coefficients.
All statistics in 3A-25, except near-surface rain rate, are computed
only when rain is judged in 1C-21 to be 'certain.' When rain is
judged in 1C-21 to be 'possible,' the observation is treated as a
'no-rain' observation. For the near-surface rain rate, the statistics
(mean, standard deviation, and histogram) are computed for
'rain-possible' as for the usual 'rain-certain.' Because the
'rain-possible' cases are dominated by noise so that the probability
of false-alarm is high, the 'rain-certain' statistics should be
considered as more representative of the TRMM radar data.
Three types of rain rates are defined in 3A-25: (1) a 'near-surface'
rain rate that is obtained from the range bin closest to the surface
which is not corrupted by the surface clutter, (2) a path-averaged
rain rate calculated by summing the values from the storm top (first
gate where rain is detected) to the last gate (gate nearest to the
surface uncontaminated by surface clutter) and dividing by the number
of gates in the interval, and (3) those at fixed heights above the
ellipsoid (2, 4, 6, 10, and 15 km).
Spatial coverage is between 40 degrees North and 40 degrees South,
owing to the 35 degree inclination of the TRMM satellite.
The Tropical Rainfall Measuring Mission (TRMM) is a joint U.S.-Japan satellite
mission to monitor tropical and subtropical precipitation and to estimate its
associated latent heating. TRMM was successfully launched on November 27, at
4:27 PM (EST) from the Tanegashima Space Center in Japan.
The TRMM Precipitation Radar (PR), the first of its kind in space, is an
electronically scanning radar, operating at 13.8 GHz that measures the 3-D
rainfall distribution over both land and ocean, and defines the layer depth of
the precipitation.
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TRMM_3A26_MONTHLY
TRMM_3A26_MONTHLY
The Tropical Rainfall Measuring Mission (TRMM) is a join...
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The Tropical Rainfall Measuring Mission (TRMM) is a joint U.S.-Japan
satellite mission to monitor tropical and subtropical precipitation
and to estimate its associated latent heating. TRMM was successfully
launched on November 27, 1997 at 4:27 PM (EST) from the Tanegashima Space
Center in Japan.
The TRMM Precipitation Radar (PR), the first of its kind in space, is
an electronically scanning radar, operating at 13.8 GHz that measures
the 3-D rainfall distribution over both land and ocean, and defines
the layer depth of the precipitation.
The primary objective of the 3A26 is to compute the rain rate
statistics over 5 degree (latitude) x 5 degree (longitude) x 1 month
space-time regions. The output products include the estimated values
of the probability distribution function of the space-time rain rates
at 4 'levels' (2 km, 4 km, 6 km, and path-averaged) and the mean,
standard deviation, and probability of rain derived from these
distributions. Three different rain rate estimates are used for the
high resolution rain rate inputs to the algorithm: (1) the standard
Z-R (or 0th-order estimate having no attenuation correction), (2) the
Hitschfeld-Bordan (H-B), and (3) the rain rates taken from 2A25.
(Fits based on the high resolution inputs from the surface reference
technique are output to the diagnostic file for evaluation).
This algorithm is based on a statistical procedure. Although the
radar team believes that a statistical method of this type should be
implemented for TRMM, the method is relatively new and the testing has
been carried out only on simulated data and on preliminary TRMM data.
Caution on the use of the results is well warranted.
Spatial coverage is between 40 degrees North and 40 degrees South,
owing to the 35 degree inclination of the TRMM satellite.
The data are stored in the Hierarchical Data Format (HDF), which
includes both core and product specific metadata applicable to the PR
measurements. A file consists of arrays of rain rate data and
supporting information, each of dimension 72 x 16, for three fixed
heights (2, 4, and 6 km) and the path-averaged rain rates. The file
size is about 16 MB (uncompressed). The HDF-EOS 'swath' structure is
used to accommodate the actual geophysical data arrays. There is 1
file of PR 3A26 data produced per month.
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TRMM_3A46_MONTHLY
TRMM_3A46_MONTHLY
TRMM product 3A46 consists of monthly Special Sensor Mi...
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TRMM product 3A46 consists of monthly Special Sensor Microwave/Imager (SSM/I)
data averaged over 1° x 1° grid boxes and one month.
This orbit boost maneuver extended the mission life significantly. All
post-boost data products had been released by the TRMM Science Project, as of
early December 2001. All TRMM data products (post- and pre-boost) are available
via the TRMM data search-and-order system at
http://disc.sci.gsfc.nasa.gov/data/datapool/TRMM/01_Data_Products/02_Gridded/.
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TRMM_3B31_MONTHLY
TRMM_3B31_MONTHLY
The TRMM Microwave Imager (TMI) is a nine-channel passi...
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The TRMM Microwave Imager (TMI) is a nine-channel passive microwave radiometer
which builds on the heritage of the Special Sensor Microwave/Imager (SSM/I)
instrument. It is flown aboard the Defense Meteorological Satellite Program
(DMSP)
platforms.
The TRMM Precipitation Radar (PR), the first of its kind in space, is an
electronically scanning radar, operating at 13.8 GHz that measures the 3-D
rainfall distribution over both land and ocean, and defines the layer depth of
the precipitation.
The TRMM 3B31 Monthly 5ý x 5ý Combined Rainfall product, contains Rain rate,
cloud liquid water, rain water, cloud ice and graupel at 14 levels for a
latitude band from 40 degree N to 40 degree S. It is derived from the TRMM
combined algorithm (2B31), which combines data from the TMI and PR to produce
the best rain estimate for TRMM.
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TRMM_3B42_V6_10_DAY
TRMM_3B42_V6_10_DAY
The Tropical Rainfall Measuring Mission (TRMM) is...
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The Tropical Rainfall Measuring Mission (TRMM) is a joint U.S.-Japan
satellite mission to monitor tropical and subtropical precipitation
and to estimate its associated latent heating. TRMM was successfully
launched on November 27, at 4:27 PM (EST) from the Tanegashima Space
Center in Japan.
The rainfall measuring instruments on the TRMM satellite include the
Precipitation Radar (PR), an electronically scanning radar operating
at 13.8 GHz; TRMM Microwave Image (TMI), a nine-channel passive
microwave radiometer; and Visible and Infrared Scanner (VIRS), a
five-channel visible/infrared radiometer.
The purpose of the 3B42 algorithm is to produce TRMM-adjusted
merged-infrared (IR) precipitation and root-mean-square (RMS)
precipitation-error estimates. The algorithm consists of two separate
steps. The first step uses the TRMM VIRS and TMI orbit data (TRMM
products 1B01 and 2A12) and the monthly TMI/TRMM Combined Instrument
(TCI) calibration parameters (from TRMM product 3B31) to produce
monthly IR calibration parameters. The second step uses these derived
monthly IR calibration parameters to adjust the merged-IR
precipitation data, which consists of GMS, GOES-E, GOES-W, Meteosat-7,
Meteosat-5, and NOAA-12 data. The final gridded, adjusted merged-IR
precipitation (mm/hr) and RMS precipitation-error estimates have a
daily temporal resolution and a 0.25-degree by 0.25-degree spatial
resolution. Spatial coverage extends from 50 degrees south to 50
degrees north latitude.
The data are stored in the Hierarchical Data Format (HDF), which
includes both core and product specific metadata. The file size is
about 0.25 MB (compressed)
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