GV Activities in Brazil:

Brazilian initiative towards the

establishment of GPM-BR program

Carlos A. Morales,

Carlos Frederico Angelis, Luiz A. T. Machado, Roberto

V. Calheiros, Reinaldo B. Silveira, Maria A. S. Dias,

Eduardo Assad, Augusto Pereira, Raimundo N. F. Mussi

GPM-Brazil

In October of 2004, The Space Agency of Brazil (AEB) creates the program with the participation of INPE, INMET, USP, IPMet/UNESP, and EMBRAPA;

Annual budget for proposal submissions;

In the first semester of 2005 the Federal Government of Brazil approves the PNAE-2005-2014 with a recommendation for GPM mission.

The Brazilian government acknowledges the importance of the global precipitation monitoring and proposes the launch of a “Multi Sensor Platform” to measure precipitation along with the GPM program.

Possible Satellite characteristics: Tropical Orbit Satellite; Microwave Imager similar to INDIAN MATRA sensor; WFI/CCD of CBERS satellite (lightning observations); Data reception and transmission to automatic

weather stations;

Main Planned Actions

Brazilian Ground Validation network;

Rainfall Ground Validation;

Development of ground receiver radiometers;

Development of microwave radiative transfer code coupled

with a NWP model that is operational in Brazil;

Dissemination of GPM rainfall products;

Brazilian Ground Validation Network

Operational radars in Brazil:

20 - Doppler S-Band

1 - S-Band

1 - Doppler C-Band

1 - Doppler X-Band

Manufactures:

15 - EEC Radars

7 - TECTELCOM

1 - McGill

Software:

17 Gamic; 2 IRIS; 1 EDGE; 1 EDGE; 1 McGill; 1 Univ. Paul Sabatier

Automatic weather stations transmitted to CPTEC-INPE

Radar Integration - I

1)1) Volumetric 240 km data are Volumetric 240 km data are stored, every 15 minutes;stored, every 15 minutes;

2)2) CAPPIs are transmitted to CAPPIs are transmitted to CPTEC to produce rainfall CPTEC to produce rainfall mosaics:mosaics:

3)3) Rain gauges are stored at Rain gauges are stored at CPTECCPTEC

Second StageSecond Stage

4)4) Volumetric data will be Volumetric data will be transmitted to a database;transmitted to a database;

5)5) Radar re-processing;Radar re-processing;

6)6) Development of rainfall Development of rainfall products;products;

Scientific collaboration between Scientific collaboration between INPE, USP, INMET, DEMET, INPE, USP, INMET, DEMET, IPMet/UNESP, TECSAT/UNIVAP IPMet/UNESP, TECSAT/UNIVAP allowed the integration of 9 allowed the integration of 9 weather radars.weather radars.

Radar Integration - II

Third Stage

7) Other radar institutes are being invited to integrate the network;

8) Volumetric data will also be stored in the main database;

9) Hourly adjusted rainfall fields: Radar + gauges + satellite rainfall estimation

Rainfall Ground Validation

Rainfall characterization:

- Rainfall PDF´s as a function of precipitating systems;

- Mean drop size distribution as a function of precipitating

systems;

- Mean vertical hydrometeor distributions (aircraft

measurements);

Validation of Rainfall Estimates:

- Retrieval of the bias, and analysis of the bias dependency

(rainfall intensity, Cv/St, precipitating systems, and etc.)

Main Ground Validation Site

Presidente Prudente

Bauru

Sao Roque

Salesopolis

Sao Jose dos Campos

4 - Disdrometers

20 Tipping buckets

Radiometers: 7, 22, 31, 43, 92 GHz1 - Disdrometer

RadioSonde

56 Automatic weather stations in SP state

Cloud microphysics aircraft

Lightning Network

USP/XPOL-2006

Ground Receiver Radiometers

• Collaboration with radio-astronomy groups for Rx development.

• portable 22 and 31 GHz was tested during the 2002-LBA field campaign;

• Working now on the new 92 GHz;

• Tests with the radiometers (7, 22, 31, 43, 92 GHz) in the radio-observatory of Atibaia will be carried out next austral summer

Radiometer designed in Brazil (22-31 GHz)Radiometer designed in Brazil (22-31 GHz)

Efforts of the Brazilian Efforts of the Brazilian

scientific community scientific community

towards the ground towards the ground

validationvalidation

150 GHz on HSB

Border

183.33 7 GHz on HSB

GPROF X PR X Rain Gauges4 months of data over the Amazon Region

Rain GaugesRain Gauges

PR-2A25PR-2A25

GPROF-2A12-V6GPROF-2A12-V6

GPROF X PRCv and St partitions

PR X DisdrometerPR X Disdrometer

TRMM Disdrometer

Horizontal Resolution dependency on

Horizontal Gradients

TRMM-PR

Bauru Radar

Differences of Tb(85 GHz) x R relationships for precipitation systems size

Differences of Tb(85 GHz) x R relationships for precipitation systems size

Seasonal intercomparisons between GCM(RegCM) and 3A25-V6 over the continent in Southeastern Brazil

2 4 6 8 10 12 14

2

4

6

8

10

12

14

9798 9899 9900 0001 0102

Re

gCM

(m

m/d

ay)

TRMM (mm/day)

DJF

10ox10o

Planned Field Planned Field CampaignsCampaigns

BARCA 2006 – Amazon Region

Radar and aircraft measurements;

TroCCiBras 2008, (TROCCINOX/HIBISCUS), São Paulo State

Radar and aircraft measurements;