7/30/2019 Gpm(by Mrinal Singh)

1/17

GLOBALPRECIPITATIONMEASUREMENTGPM

7/30/2019 Gpm(by Mrinal Singh)

2/17

GPM is an international satellite mission to provide next-

generation observations of rain and snow worldwide every

three hours.

NASA and the Japanese Aerospace Exploration Agency

(JAXA) will launch a Core satellite carrying advanced

instruments that will set a new standard for precipitation

measurements from space.

Their data will be used to unify precipitation measurements

made by an international network to quantify when, where,

and how much it rains or snows.

7/30/2019 Gpm(by Mrinal Singh)

3/17

Scheduled to launch in 2014, the GPM Core Observatory will carry

the first space Dual-frequency Precipitation Radar (DPR), and a

multi-channel GPM Microwave Imager (GMI).

7/30/2019 Gpm(by Mrinal Singh)

4/17

The Tropical Rainfall Measuring Mission (TRMM),

launched in 1997, measures moderate and heavy rainfallin the tropics.

The GPM Core Observatory will extend the observations

by covering the globe from the Antarctic Circle to theArctic Circle.

The design of the GPM Core Observatory is an

advancement ofTRMMs highly successful rain-sensing

package that extends its capabilities to detect falling

snow, measure light rain, and provide, for the first time,

quantitative estimates of microphysical properties of

precipitation particles.

7/30/2019 Gpm(by Mrinal Singh)

5/17

Engineers are building and testing the GPM CoreObservatory at Goddard Space Flight Center.

Rigorous testing is conducted to ensure correctness and

work efficiency of new components added to thespacecraft .

7/30/2019 Gpm(by Mrinal Singh)

6/17

GPMs global precipitation data will lead to scientific

advances and societal benefits in the following areas:

Improved knowledge of the Earths water cycle & its link to

climate change.

New insights into precipitation microphysics, storm

structures & large-scale atmospheric processes.

Extended capabilities in forecasting, monitoring &predicting of extreme weather events.

Better agricultural crop forecasting & monitoring of

freshwater resources.

7/30/2019 Gpm(by Mrinal Singh)

7/17

A Japanese H-IIA rocket will carry

the GPM Core Observatory into

orbit.

Spacecraft: GPM Core Observatory

Launch Vehicle: H-IIA Rocket

Launch Site: Japan

Launch Date: 2014

7/30/2019 Gpm(by Mrinal Singh)

8/17

7/30/2019 Gpm(by Mrinal Singh)

9/17

The foundation of the GPM mission is the Core

Observatory satellite provided by NASA and JAXA.

The GPM constellation of satellites can observe

precipitation over the entire globe every 2-3 hours.

The Core satellite will use two science instruments:

GPM Microwave Imager (GMI)

Dual-frequency Precipitation Radar (DPR)

Together these two instruments provide a database of

measurements against which other partner satellites

observations can be compared and combined to make a

global precipitation dataset.

7/30/2019 Gpm(by Mrinal Singh)

10/17

The GMI uses 13 different microwave channels to observe

energy from the different types of precipitation through

clouds for estimating rain and for detecting snowfall.

It scans a region 550 miles (885 kms) across.

7/30/2019 Gpm(by Mrinal Singh)

11/17

The DPR provides 3D information about precipitation

particles derived from reflected energy by these particles at

different heights within the cloud system.

Its two frequencies allow the radar to infer the sizes of

precipitation particles and offer insights into a storms

characteristics.

The Japan Aerospace and Exploration Agency (JAXA) and

Japans National Institute of Information and

Communications Technology (NICT) built the DPR.

7/30/2019 Gpm(by Mrinal Singh)

12/17

Tracking precipitation from space with satellites provides

accurate information of when, where and how much it rains or

snows anywhere in the world.

Space-based remote sensing instruments present a way to

provide more frequent and accurate measurements of rain and

snow from the vantage point of a satellite.

NASAs Global Precipitation Measurement (GPM) mission willjoin its predecessor the Tropical Rainfall measurement Mission

(TRMM) in providing advanced information on rain and snow

characteristics and detailed 3-D views of precipitation structure

in the atmosphere.

7/30/2019 Gpm(by Mrinal Singh)

13/17

By constant scanning of the Earths

surface, GMI will extends tropical

cyclone tracking and forecasting

capabilities of current satellites by

covering the area from 65 S to65N.

7/30/2019 Gpm(by Mrinal Singh)

14/17

The GMI and DPR instruments

onboard the GPM Core Observatory

are the first space-borne sensors

designed to detect falling snow from

space.

Through several pre-launch field

testing campaigns, scientists are

working to match observations on the

ground with instrument observations

so they can develop methods tomeasure falling snow using the GPM

Core satellite instruments.

7/30/2019 Gpm(by Mrinal Singh)

15/17

GPM will contribute data to the International Flood Network (IFNet),

which converts satellite precipitation data into rainfall maps as part of

Global Flood Alert System.

In trial version, IFNet determines flood risk based on a minimum

precipitation threshold and in future will be alert of potential flooding.

7/30/2019 Gpm(by Mrinal Singh)

16/17

GPM combines information on surface susceptibility with satelliterainfall data to identify locations of potential landslides.

GPMs frequent and detailed coverage may help improve model

accuracy and expand forecasting capabilities.

7/30/2019 Gpm(by Mrinal Singh)

17/17