# Presentation: 289235

## Advanced Geosynchronous Studies - Imager (AGSI)

- Dennis Chesters
- GOES project scientist
- NASA-GSFC
- January 1999

## AGS Imager design in 1998

- Scan mirror design
- Fit on a satellite like GOES-N
- Fit in the 5-band Imager slot
- Trade-up from NOAA baseline(ABI 8-band imager, circa 2010)
**Ready for flight circa 2005**
**Next millenium science on GOES**

## AGS Imager Structure

## AGS Imager Schematic

## Detectors & Beamsplitters inside Cooled Dewars

## AGS Imager technical requirements

**National Weather Service requirements (GOES-R, circa 2010)**
- rates:
- regional (1000x1000 km) @ 1 minute intervals for nowcasts
- CONUS (3000x5000 km) @ 3.5-, 5-, 6-minute intervals for NEXRAD
- full disk (16000x16000 km) @ 15 minute intervals for winds and storms
- resolution: 0.5 km vis & 2 km infrared
- navigation: ± 1 km earth-location
- 8 spectral bands: 0.6, 1.6, 3.7, 6.7, 7.3, 11, 12, 13 microns
- Signal/Noise 250/1 vis.,  NEDT 0.3 K infrared
- operate through eclipse and local midnight
- selectable sectors, data and products deliverable within 3 minutes
**Science goals (earth science supplement, circa 2003-2005)**
**emulate MODIS and POES bands in all atmospheric windows**
- diurnal cycle at full-disk; cloud phase, aerosols, winds, water vapor layers
- shotwave and longwave calibration: internal, terrestrial, lunar, solar
- cross-references with polar-orbiting satellites
- long-term radiance data and products in standard servers on the network
**National observatory for unpredictable events**

## Science and operational products from an Advanced Geosynchronous Imager

- Episodic & sporadic events
- Clouds
- Surface conditions
- Atmospheric moisture
- Winds
**New and improved weather and climate data**
**Cirrus and Aerosols, calibrated**
**Colorimetry - ocean, land; smoke and haze**
**Observe variations in the diurnal cycle**
**Cross correlations with EOS**
**Regional dynamic process studies**
**Gap-filling in space-time, in statistics, and in physical budgets**
**Long duration science archive for trends**

## ITT-AB-AGS Imager Performance

- _PERFORMANCE__	__ITT__	__	__ABI__	__	__**AGSI**_
- Speed (full disk)	27 min		5 min		5 min
- Resolution (IFOV)	1 & 4 km		0.5 & 2 km	**0.3 & 0.7& 1.3 km**
- Channels		5		8		**18***
- Signal/Noise		250-1000:1 	500-2000:1	500-2000:1
- Navigation		±4 km		TBD		**±1 km**
- Registration		±25%		±15% FOV	±10% FOV
- Calibration (IR)	 1 K ± 0.1 K 	1 K ± 0.1 K	1 K ± 0.1 K
- 		(vis & NIR)	none		5% ± TBD	**1% ± 0.1%***
- 			*** more spectral bands and calibration enables science**

## AGSI-ABI Imager Channels

_**(μm)**__**	**__**FOV(km)**__**	**__**Noise**__**	**__**Heritage***__**	**__**Purpose**_
**0.47****	****0.5****	****1/500****	****M****	****smoke, dust and haze**
**0.60****	****0.5****	****1/500****	****AR****M****ISm****	****cloud albedo, wind**
**0.80****	****0.5****	****1/400****	****AMm****	****vegetation**
**1.37****	****1****	****1/300****	****M****	****cirrus**
**1.65****	****1****	****1/500****	****M****Rm****	****cloud/snow, fires**
**2.22****	****1****	****1/400****	****M****	****cloud ice, ice, fires**
**3.60****	****2****	****0.1K****	****MS****	****sfc, total water vapor**
**3.95****	****2****	****0.1K****	****AR****M****ISm****	****sfc. & cloud temp., fires, fog**
**4.15****	****2****	****0.2K****	****M****S****	****sfc, low air temp.**
**6.55****	****2****	****0.1K****	****Sm****	****tropopause water vapor**
**6.85****	****2****	****0.1K****	****R****M****IS****	****high water vapor**
**7.15****	****2****	****0.1K****	****RSm****	****mid. water vapor**
**7.45****	****2****	****0.1K****	****MS****	****low water vapor**
**8.50****	****2****	****0.2K****	****M****m****	****total water vapor**
**9.70****	****2****	****1.0K****	****M****Sm****	****total ozone**
**11.0****	****2****	****0.1K****	****AR****M****ISm****	****sfc. & cloud temp., fires, fog**
**12.4****	****2****	****0.3K****	****AR****M****ISm****	****sfc, total water vapor, volcanic ash**
**13.3****	****2****	****0.5K****	****M****RISm****	****high cloud cover**
*******M=MODIS****, A=AVHRR, R=GOES-R, I=GOES-8 Imager, S=GOES-8 Sounder, **_**m=MSG**_

## AGS Imager Spectrum

## Current Imager GOES-N5 band simulation

## Baseline Imager GOES-R8 band simulation

## Advanced Imager GOES-P/Q18 band simulation

## Future of NASA-NOAA?

- _[Dan ](file:///GoldinDec98.html)__[Goldin ](file:///GoldinDec98.html)__[at AGU, ](file:///GoldinDec98.html)__[December](file:///GoldinDec98.txt)__[ 1998](file:///GoldinDec98.html)_
**“****We need to work out a larger architecture that encompasses more than 2-5 day weather & climate forecasts. It should consider Geostationary Earth Orbiters(GEO) as well as polar orbiters.****”**
**“****NASA will step up to being the technology supplier, but there must be a commitment and a process to infuse new technologies into the operational systems. Otherwise, they will never be able to produce more than they are producing today.****“**

## Priority Interrupt Tests GOES-10 -- May 1998

**Full Disk every hour****CONUS every 6 minutes****24 hours/day****for integration with radar**
**Full disk every hour****Gulf coast every 1.2 minutes****24 hours/day_x0008_****for local severe storms**