GPM PR on TRMM Echo Power L1B 1.5 hours 5 km V07 (GPM_1BPR) at GES DISC

Description

This is the new (GPM-formated) TRMM product. It replaces the old TRMM_1B21,1C21 Version 07 is the current version of the data set. Previous versions have been superseded by Version 07. 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 1B21 calculates the received power at the PR receiver input point from the Level-0 count value which is linearly proportional to the logarithm of the PR receiver output power. To convert the count value to the input power, extensive internal calibrations are applied, which are mainly based upon the system model, temperature dependence of model parameters and many temperature sensors attached at various locations of the PR. Periodically the input-output characteristics are measured using an internal calibration loop for the IF unit and later receiver stages. To make an absolute calibration, an Active Radar Calibrator (ARC) is placed at Kansai Branch of CRL and overall system gain of the PR is being measured every 2 months. Using the transfer function based on the above internal and external calibrations, the PR received power is obtained. Note that the value assumes that the signal follows the Rayleigh fading, so if the fading characteristics of a scatter is different, a small bias error may occur (within 1 or 2 dB). Changes in horizontal resolution resulting from the TRMM boost that occurred on 24 August 2001: Pre-Boost (before 7 August 2001): Temporal Resolution: 91.5 min/orbit ~ 16 orbits/day; Swath Width: 215 km; Horizontal Resolution: 4.3 km Post-Boost (after 24 August 2001): Temporal Resolution: 92.5 min/orbit ~ 16 orbits/day; Swath Width: 247 km; Horizontal Resolution: 5.0 km

Resources

Name Format Description Link
5 https://docserver.gesdisc.eosdis.nasa.gov%2Fpublic%2Fproject%2FGPM%2Fbrowse%2FGPM_1BPR.png
5 https://disc.gsfc.nasa.gov%2Fdatacollection%2FGPM_1BPR_07.html
5 https://disc2.gesdisc.eosdis.nasa.gov%2Fdata%2FTRMM_L1%2FGPM_1BPR.07
5 https://disc2.gesdisc.eosdis.nasa.gov%2Fopendap%2FTRMM_L1%2FGPM_1BPR.07%2F
5 https://search.earthdata.nasa.gov%2Fsearch%3Fq%3DGPM_1BPR
5 https://gpm.nasa.gov%2F
5 https://gpmweb2https.pps.eosdis.nasa.gov%2Fpub%2FGPMfilespec%2Ffilespec.GPM.pdf
5 https://pps.gsfc.nasa.gov%2FDocuments%2FformatChangesV7.pdf
5 https://www.eorc.jaxa.jp%2FTRMM%2Fdocuments%2FPR_algorithm_product_information%2Fpr_manual%2FPR_Instruction_Manual_V7_L1.pdf
5 https://docserver.gesdisc.eosdis.nasa.gov%2Fpublic%2Fproject%2FGPM%2FREADME.TRMM.pdf
5 https://gpmweb2https.pps.eosdis.nasa.gov%2Ftsdis%2FAB%2Fdocs%2Fanomalous.html
34 GPM_1BPR.png https://docserver.gesdisc.eosdis.nasa.gov/public/project/GPM/browse/GPM_1BPR.png
21 GPM_1BPR_07.html https://disc.gsfc.nasa.gov/datacollection/GPM_1BPR_07.html
5 GPM_1BPR.07 https://disc2.gesdisc.eosdis.nasa.gov/data/TRMM_L1/GPM_1BPR.07
5 GPM_1BPR.07 https://disc2.gesdisc.eosdis.nasa.gov/opendap/TRMM_L1/GPM_1BPR.07/
21 anomalous.html https://gpmweb2https.pps.eosdis.nasa.gov/tsdis/AB/docs/anomalous.html
5 https://search.earthdata.nasa.gov/search?q=GPM_1BPR
5 https://gpm.nasa.gov/
33 filespec.GPM.pdf https://gpmweb2https.pps.eosdis.nasa.gov/pub/GPMfilespec/filespec.GPM.pdf
33 formatChangesV7.pdf https://pps.gsfc.nasa.gov/Documents/formatChangesV7.pdf
33 PR_Instruction_Manual_V7_L1.pdf https://www.eorc.jaxa.jp/TRMM/documents/PR_algorithm_product_information/pr_manual/PR_Instruction_Manual_V7_L1.pdf
33 README.TRMM.pdf https://docserver.gesdisc.eosdis.nasa.gov/public/project/GPM/README.TRMM.pdf
34 GPM_3CMB_TRMM.png https://docserver.gesdisc.eosdis.nasa.gov/public/project/GPM/browse/GPM_3CMB_TRMM.png
21 GPM_3CMB_TRMM_07.html https://disc.gsfc.nasa.gov/datacollection/GPM_3CMB_TRMM_07.html
5 GPM_3CMB_TRMM.07 https://disc2.gesdisc.eosdis.nasa.gov/data/TRMM_L3/GPM_3CMB_TRMM.07/
21 contents.html https://disc2.gesdisc.eosdis.nasa.gov/opendap/TRMM_L3/GPM_3CMB_TRMM.07/contents.html
5 https://search.earthdata.nasa.gov/search?q=GPM_3CMB_TRMM_07
33 filespec.GPM.V7.pdf https://gpmweb2https.pps.eosdis.nasa.gov/pub/stout/helpdesk/filespec.GPM.V7.pdf
5 https://pmm.nasa.gov/TRMM/trmm-instruments
34 GPM_1BPR.png https://docserver.gesdisc.eosdis.nasa.gov/public/project/GPM/browse/GPM_1BPR.png
21 GPM_1BPR_07.html https://disc.gsfc.nasa.gov/datacollection/GPM_1BPR_07.html
5 https://search.earthdata.nasa.gov/search?q=GPM_1BPR
33 filespec.GPM.pdf https://gpmweb2https.pps.eosdis.nasa.gov/pub/GPMfilespec/filespec.GPM.pdf
33 formatChangesV7.pdf https://pps.gsfc.nasa.gov/Documents/formatChangesV7.pdf
5 GPM_1BPR.07 https://disc2.gesdisc.eosdis.nasa.gov/opendap/TRMM_L1/GPM_1BPR.07/
33 PR_Instruction_Manual_V7_L1.pdf https://www.eorc.jaxa.jp/TRMM/documents/PR_algorithm_product_information/pr_manual/PR_Instruction_Manual_V7_L1.pdf
5 https://gpm.nasa.gov
0 The metadata's original source. https://cmr.earthdata.nasa.gov/search/concepts/C2264132201-GES_DISC.iso19115
5 GPM_1BPR.07 https://disc2.gesdisc.eosdis.nasa.gov/data/TRMM_L1/GPM_1BPR.07

Tags

  • earth-science-radar-spectral-engineering-radar-reflectivity
  • earth-science-radar-spectral-engineering-radar-backscatter

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