Welcome To Global Precipitation Measurement (GPM) Mission .

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Welcome toGlobal Precipitation Measurement (GPM) MissionApplications Webinar SeriesWebinar 4: GPM Data Updates and Reading with PythonSpeaker:Amita Mehtaamita.v.mehta@nasa.govNASA/UMBC Joint Center for Earth Systems TechnologyGPM Applications Webinar - 4September 13,, 2016

AcknowledgementsDalia KirschbaumGPM Applications, NASA-GSFCdalia.b.kirschbaum@nasa.govKristen WeaverEducation Specialistkristen.l.weaver@nasa.govJacob ReedWeb developerjacob.reed@nasa.govAmanda RumseyNASA-UMBC/Joint Center for Earth Systems Technologyamanda.c.rumsey@nasa.govNASA Applied Remote Sensing Training rs/global-precipitationGPM Applications Webinar - 4September 13,, 2016

Webinar Objective This webinar series is designed to facilitate GPM precipitationdata usage in environmental research, applications, andenvironmental decision support activitiesGPM Applications Webinar - 4September 13,, 2016

Outline of the Webinar Series1.Overview of GPM Mission, Data Products, and Data Access Tools (12/8/2015)2.GPM Data Products Updates and Demonstration of Web-tools for Data Search,Analysis, Visualization, and Download(3/15/2016)3.Demonstration of GPM Data Import and Analysis in GIS (QGIS)(6/14/2016)4.Python Script for Reading HDF5 GPM DataGPM Applications Webinar - 4(9/13/2016)September 13,, 2016

Webinar-4 Agenda* Brief Overview of GPM GPM Products Updates and Access GPM Ground Validation Steps for Using Python Script to Read GPM IMERG Data*This python script is designed to provide a general framework for reading HDF5 data format.In addition, a script to spatially subset and save data as a text file is provided.The script will have to be modified for your application and may not be usable as is forspecific needsGPM Applications Webinar - 4September 13,, 2016

Brief Overview of GPMGPM Applications Webinar - 4September 13,, 2016

Access to GPM Training ides andrecordings ofthe first twowebinars areavailable fromGPM TrainingWeb pageGPM Applications Webinar - 4September 13,, 2016

GPM Core and Constellation Satelliteshttp://pmm.nasa.gov/GPMGPM Core satellite was launched onFebruary 27th, 2014The area covered by three TRMM orbits[yellow] versus orbits of the GPM CoreObservatory [blue]GPM measurements span middle andhigh latitudesGPM Applications Webinar - 4September 13,, 2016

GPM SensorsGMIDPRKa 35.5 GHz, Swath Width 120 km, Resolution 5.2 kmGMI Frequencies:10.6,18.7,23.8,36.5,89,166 & 183 GHzSwath width 885 kmResolution: 19.4km x 32.2km (10 GHz)to 4.4km x 7.3km (183 GHz)Higher spatial resolutions than TRMM TMIHigh frequencies help measure snowKu 13.6 GHZ, Swath Width 245 km, Resolution 5.2 kmGPM Applications Webinar - 4September 13,, 2016

GPM s of the algorithms can be found from thePrecipitation Processing System (PPS)GPM ATBD (Algorithm Theoretical Basis Documents)GPM/DPR Level-2 Algorithm Theoretical Basis DocumentGPM GPROF (Level 2) Algorithm Theoretical Basis Document.GPM Combined Radar-Radiometer Precipitation Algorithm TheoreticalBasis Document (US Integrated Multi-satellite Retrievals for GPM (IMERG)GPM Applications Webinar - 4September 13,, 2016

Summary of GPM Level-2 Precipitation ProductsSensor/Product NameSpatial Resolution andCoverageTemporal ResolutionData FormatDPR Ku-only/ 2A-KuDPR Ka-only/2A-KaDPR KU & Ka/2A-DPR5.2 km x125 mSingle Orbitand16 orbits per day(70 S-70 N)20-120 minutesHDF5 and OPenDAP24 hoursGMI/2A-GPROF4 km x 4 kmOrbitaland16 orbits per day (70 S70 N)2 – 40 hoursCombined GMI and DPR/2A-CMBOrbital (70 S-70 N)5 km x 5 km, CoincidentKu-Ka-GMI footprints3 – 40 hours*In addition to surface rainfall rate in mm//hour, vertical precipitation profiles and latent heating are availablein these data productsGPM Applications Webinar - 4September 13,, 2016

Summary of GPM Level-3 Precipitation ProductsSensor/ProductNameSpatial Resolution andCoverageTemporal ResolutionData FormatIMERG0.1 x0.1 (90 S-90 N)30-minutes(Near Real Time)with 6-hour latency,16-hour latency and 3-monthslatencyHDF5, NetCDF,OPenDAP,ASCIIGIF, PNG ImagesKML for Google Earth3-CMBCombined GMI DPR0.1 x0.1 (70 S-70 N)Monthlyrainfall Averages3-DPR rainfall Averages0.25 x0.25 5.0 x5.0 (67 S-67 N) for Daily(70 S-70 N) for Monthly3-GPROF0.25 x0.25 (90 S-90 N)GMI rainfall AveragesDaily and MonthlyDaily and MonthlyDaily and Monthly*In addition to surface rainfall rate in mm//hour, vertical precipitation profiles and latent heating are availablein these data productsGPM Applications Webinar - 4September 13,, 2016

Widely used GPM Data ProductsBased on the Users FTP Requests IMERG For a variety of environmental applications2AGPROF rainfall swath estimates for GMI andconstellation radiometers 1C calibrated brightness temperature for GMI andconstellation radiometers 2A DPR rainfall swath estimatesGPM Applications Webinar - 4September 13,, 2016

GPM Data Products Updates and AccessGPM Applications Webinar - 4September 13,, 2016

Precipitation Measurement Mission (PMM)Home of all information about GPM/TRMM for: Data Access and Updates Research and ApplicationsGPM Applications Webinar - 4September 13,, 2016

Data Product UpdatesMany Near-real Time GPM data products are based on version-4 (V04)algorithms (as of March 2016)[Level 1B GMI, Level 1C GMI, Level 1 Radar, Level 2 Radar, Level 2 Combined] V04 is the first version that uses GPM as the calibrator for theconstellation measurements rather than TRMM. GMI is extremely well calibrated and the brightness temperatures in 1B and1C are an important improvement over those in V03. V04 has improved retrievals in the Ku, Ka, and DPR level 2 products. GMI/DPR Combined product has also made retrieval improvements in V04. GPROF is using V04 as of May 2, 2016. IMERG is still using V03 because the constellation radiometers are stillusing V03 -- but all will be updated to V04 in October/November 2016GPM Applications Webinar - 4September 13,, 2016

IMERG Updates and Future PlansMultiple runs accommodate different userrequirements for latency and accuracy “Early” – now 5 hours (flash flooding) “Late” – now 15 hours (crop forecasting) “Final” – 3 months (research data)Native time intervals are half-hourly andmonthly (Final only) value-added products at 3 hours,1, 3, 7days0.1 global CED grid PPS and GES DISC provide subsetting byparameter and location initial release covers 60 N-S4 hours12 hoursprecipitation phase in geo-TIFFs; additionalsupport for shapefile-based area averaging90 NSCourtesy: George HuffmanGPM Applications Webinar - 4September 13,, 2016

IMERG Updates and Future PlansCurrent (Version 3) data record starts April 2014 (Final), March 2015 (Early),April 2015 (Late)Version 4 IMERG will be instituted soon ( November 2016) “Initial Processing” with new data “Retrospective Processing” for recorded data during the GPM era (fromApril 2014)In late 2017 or early 2018 Version 5 IMERG will be instituted covering the TRMM and GPM era (from January 1998, or at leastFebruary 2000) seeking to run an “Interim” reprocessing in Spring 2017 (using V.4)TMPA, TMPA-RT continue to be run done to provide a consistent long record until IMERG covers the TRMMera shut down about 3 months after IMERG is extended could end early if key inputs are endedCourtesy: George HuffmanGPM Applications Webinar - 4September 13,, 2016

IMERG Updates and Future PlansThere may be disruption in IMERG data availability while transitionfrom V03 to V04 takes placeDocumentation will be availableIMERG V04 is likely to be more accurate – particularly improvementin high bias at higher precipitation ratesAs of 9-8-2016, however, due to outage of SSMIS, lower qualityinfrared data are used – PPS/Mission updates will inform when thesituation changesCourtesy: George HuffmanGPM Applications Webinar - 4September 13,, 2016

GPM Data #registerGPM Applications Webinar - 420September 13,, 2016

GPM Data Servershttp://pmm.nasa.gov/data-access/GPM Applications Webinar - 4September 13,, 2016

GPM Data #registerGPM Applications Webinar - 4September 13,, 2016

GPM Data #registerGMI Data available from NASA Worldview (NRT ew/GPM Applications Webinar - 4September 13,, 2016

GPM Data Access Using Selected equires v/stormData Products and FormatsL1B, L2, and L3 GMI-GPROFIMERG Half-hourly, MonthlyOrbital and Gridded Daily, MonthlyHDF5, [Selected products in OPenDAP -- can beconverted to ASCII, Binary, NetCDF]IMERG Half-hourly, MonthlyNetCDF, GeoTIFF, PNGL1B and 1C, L2, L3 GMI, DPR, GMI-DPR CombinedData, Orbital and Gridded Daily, MonthlyIMERG Half-hourly, MonthlyHDF5, PNGAnalysis and/orVisualizationDataDownloadN/ADownload bySelect and Clickon Data FilesORBatch Downloadof Multiple FilesVisualization: Map, Time Series,Scatter PlotHistogramAnalysis: Time-averaged Maps,Time Series, Scatter Plot, MapCorrelations, Vertical Profiles, Timeaveraged DifferencesDownload bySelect and Clickon Data FilesMap Visualization,Interactive Latitude/Longitude PointData Value DisplayFTPRequires RegistrationGPM Applications Webinar - 4September 13,, 2016

New GPM NRT Swath - Viewer esium/GPMNRTView.htmlGPM Applications Webinar - 4September 13,, 2016

GPM Ground ValidationGPM Applications Webinar - 4September 13,, 2016

GPM Ground Validation Portalhttps://pmm.nasa.gov/index.php?q science/ground-validationPhysical Validation1) Disdrometer2) Multi-frequency polarimetric radarand profiler3) In situ and profiling aircraftmeasurements for cloudmicrophysical properties (size,shape, types) and rainfall4) High-altitude airborne dualfrequency radar and radiometer(on-board ER-2 and DC-8)GPM Applications Webinar - 4September 13,, 2016

GPM Ground Validation Portalhttps://pmm.nasa.gov/index.php?q science/ground-validationStatistical ValidationTRMM PR and NEXRAD match-ups. In this case, thedata range from 0 to 13.5 km in elevation in 1.5 kmsteps over the Miami, Florida site (KAMX) on August30, 2006.GPM Applications Webinar - 4Location of radars in the Validation Network. Redcircles indicate the original set used with TRMM, andblue circles indicate new radars to be used with GPM.September 13,, 2016

GPM Ground Validation Field EX: The Olympic Mountain Experimentin Washington State (November 2015 to February 2016) toassess GPM core rain and snow productsIPHEx: Integrated Precipitation and Hydrology ExperimentIn Southern Appalachian – eastern US from May 1-June 152014IFloodS: Iowa Flood Studies from May 1 to June 15, 2013To measure and assess rain characteristics and improvealgorithmsGCPEX: GPM Cold-season Precipitation Experiment inCanada in January-February, 2012GPM Applications Webinar - 4September 13,, 2016

Demonstration of Sample Python ScriptInstructions and scripts are available for downloadGPM Applications Webinar - 4September 13,, 2016

Future PlanMore webinars planned for 2016-17 :-- data updates, validation, and applications-- TMPA-IMERG combined data information-- working with Level-2 data in QGIS-- hands-on case studies to access rain/snow data using pythonGPM Applications Webinar - 4September 13,, 2016

Thank You!GPM Applications Webinar - 4amita.v.mehta@nasa.govSeptember 13,, 2016

GIF, PNG Images KML for Google Earth 3-CMB Combined GMI DPR rainfall Averages 0.1 x0.1 (70 S-70 N) Monthly 3-DPR rainfall Averages 0.25 x0.25 5.0 x5.0 (67 S-67 N) for Daily (70 S-70 N) for Monthly Daily and Monthly Daily and Monthly 3-GPROF GMI ra

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