Geostationary Imaging Fourier Transform Spectrometer Geostationary Imaging Fourier Transform Spectrometer An Update of the GIFTS Program An Update of the GIFTS Program

W. L. Smith (NASA Langley Research Center)Presentation to the GOES Users Conference II (October 1-3, 2002, Boulder Colorado)

4-d Digital Camera:4-d Digital Camera:

•

Horizontal:Horizontal: Large area format Focal Plane detector Arrays

Vertical:Vertical: Fourier Transform Spectrometer

Time: Time: Geostationary Satellite

New Technology for Atmospheric Temperature, Moisture, & Winds

EO-3 “GIFTS-IOMI”

GGeostationary IImaging FFourier TTransform SSpectrometer GIFTS GIFTS – – A revolutionary weather forecast toolA revolutionary weather forecast tool

Originators: NASA(LaRC), University of Wisconsin (CIMSS), and Utah State University (SDL)

Advanced Geostationary Studies (AGS) Advanced Geostationary Studies (AGS) Program RoadmapProgram Roadmap

Studies Laboratory Demonstration

Future Geo-Sats

Aircraft

Water Vapor Tracer Wind Demonstration

EO-3 (GIFTS-IOMI)

NASA NASA GIFTS Instrument &

Supporting Technologies(~105 M)

NavyNavySpacecraft &

Instrument Lifetime Enhancements

(~70 M)

NOAANOAAUS Ground System, Algorithms, Data

Processing & Archive(~40 M)

Partner Contributions

Air Force (STP) Air Force (STP) Launch Vehicle &Launch Services

(~65 M)

Australia (BoM)Australia (BoM)**IO Ground System, Data Processing & Archive

(~20 M)

* Under negotiation

Revolutionary Weather Observations Validation of Next Revolutionary Weather Observations Validation of Next Generation Geostationary Meteorological Satellite SystemGeneration Geostationary Meteorological Satellite System

(~300 M)

GIFTS-IOMI Program ConceptGIFTS-IOMI Program Concept

Imaging InterferometerCryogenic Michelson Interferometer

Laser Metrology System

On-Board Calibration

LFPA and Cryogenic Cooling128 x 128 Infrared Detector Arrays

Redundant Cryo-Coolers

High Speed Signal ProcessingRad-Hard Analog to Digital Converters

PowerPC Rad750

Data Compression Rad-Hard Processors

Pointing and ControlStar Tracker

512 x 512 Visible Detector Arrays

Lightweight Optics

SiC Telescope

TECHNOLOGY

VALIDATION

Indian Ocean Ops

NASA - Demonstrate Wind Sounding Measurement Concept & Validate the Technologies

NOAA - Demonstrate Operational Utility & Infuses Technology into NOAA instruments

Navy - Provides Advanced Imaging/Sounding Data Products for Fleet Operations

INFUSION

GIFTS Sampling CharacteristicsGIFTS Sampling Characteristics• Two 128x 128 Infrared focal plane detector arrays with 4 km footprint size

• Two 512 x 512 Visible focal plane detector arrays with 1 km footprint size

• Field of Regard 512 km x 512 km at satellite sub-point

• Ten second full spectral resolution integration time per Field of Regard

• ~ 80,000 Atmospheric Soundings every minute

GIFTS IR Measurements and ProductsGIFTS IR Measurements and Products

Products:Water vapor (soundings, fluxes, winds)

Temperature (sounding, stability)Carbon monoxide concentration (2 Layers)

Ozone concentration (4 Layers)Surface Temperature and emissivity

Clouds (altitude, optical depth, microphysical properties, winds)Aerosol Concentration and Depth

(8.8 to 14.6 microns) (4.4 to 6.1 microns)

GIFTS Performance Relative to GOESGIFTS Performance Relative to GOES

1 Per 3000-km x 3000-km area2 Vertical Resolution (3:1) per Area Resolution (4:1) per

Coverage Rate (6:1) relative to GOES

2 x

Moisture Weighting Functions

Pre

ssu

re (

hP

a)

Pre

ssu

re (

hP

a)

GIFTS (1750)GOES (18)

1000 1000

100100

GIFTS will have more and sharper weighting functions compared to the current GOES sounder

Retrievals will have much better vertical resolution

GIFTS Improvements WRT GOES Sounding System GIFTS Improvements WRT GOES Sounding System

GIFTS – Water Vapor Airborne ValidationGIFTS – Water Vapor Airborne Validation

Alt

itu

de

(km

)

Relative H

um

idity (%

)

Distance (75 km)

3km

Airborne Demonstration of Concept: 1-2 km vertical resolution water vapor profile measurements

NASTRaob

Wavenumber(cm-1)

H2O Radiance SpectrumWavelength (m)

I-HOP Radiosonde ComparisonsI-HOP Radiosonde Comparisons

June 3, 2002

NAST:16:02 UTC 36.61N, -97.48W

RAOB:CF (15/18 UTC)36.61N, 97.49W

NAST:12.53 UTC 36.61N, -97.48W

RAOB:WWR (14UTC)36.43N, 99.53W

June 9, 2002

June 11, 2002 June 12, 2002

NAST:16:18 UTC 36.46N, 101.05 W

RAOB:WWR (14UTC)36.43N, 99.53W

NAST:19:40 UTC 36.,27N, 99.73 W

RAOB:WWR (17UTC)36.43N, 99.53W

ARM (Lamont OK) ComparisonsARM (Lamont OK) Comparisons

NAST-IWater Vapor TrackingDemonstrates GIFTS

Wind Profiling Technique

δt~35 min

60 km x 40 km

WindWindMeasurementMeasurement

Water Vapor Flux (3 x 3 GIFTS Cubes)Water Vapor Flux (3 x 3 GIFTS Cubes)

GIFTS Fills Geostationary Data VoidGIFTS Fills Geostationary Data Void

GIFTS-IOMI

(India)83 E

(USA) 75º E

GIFTSGIFTS

CALIPSO

Aqua

CloudSat

PARASOL

Aura

NPP/NPOESS

GIFTS – The Geostationary AugmentationGIFTS – The Geostationary AugmentationOf the Earth Observing System (EOS)Of the Earth Observing System (EOS)

SummarySummaryWeather & Air Quality Forecasting:Weather & Air Quality Forecasting:• Hurricane landfall (steering wind profiles)

• Tornadic storms (stability change monitoring)

• Nowcasting (rapid measurement update)

• Numerical prediction (initial p,T,q,V data)

• Air quality forecasts (O3 and CO transport)

Enhanced Research Data Sets:Enhanced Research Data Sets:• Aerosol and Cloud Radiation Feedback Mission• Atmospheric Chemistry Mission• Global Precipitation Mission• Global Weather Experiments (e.g., THORPex)

Technology Transfer into GOES:Technology Transfer into GOES: