LRGS Enhancements for LRIT

NOAA TWG MeetingMay 12, 2011

Sutron Corporation22400 Davis Drive, Sterling VA 20164

Tel: (703) 406-2800 Email: tempest@sutron.com

Not your Grandfather’s LRGS

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DCS Data Flow

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LRIT Availableon both GOES East & West

• Combined data stream of ALL DCPs is sent to both GOES east and west .– LRIT from either Satellite gets the entire DCS

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LRIT sends Files• LRIT is a File Transfer mechanism.• Not efficient to send each DCP Msg in a

Separate File• Files are sent as High, Medium, & Low Priority

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LRIT File Priorities

• Each DCP Msg assigned a priority and placed in High/Medium/Low Priority File– Based on: Channel, DCP Address, Network List

• NOAA sets 3 “limits” that control when files are closed-off and sent.– Max number of messages– Max time-span in seconds– Max file size

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We Recommend …• Limits Controlling when File is Sent:

• How to assign DCP messages to priority:– High: A few very special DCPs (e.g. Tsunami)– Medium: Random channels– Low: Everything else

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Priority Max Msgs Max Time Max Bytes

High 1 1 16,000

Medium 5 10 sec 500,000

Low 200 30 sec 1,000,000

Impact to Processing Software

• LRGS with LRIT looks the same to downstream applications like DECODES.

• No changes required!

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LRIT Receivers

• We have successfully tested Tempest DAS (LRGS) with four different LRIT Receiver Vendors:– Dartcom, NVG, VCS, Avtec

• The vendor provides software for file reconstruction, image capture, and processing.

• LRGS processes DCS files and serves them out to clients like DECODES.

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Sutron LRIT Receiver• Components are Similar to DOMSAT:– Small dish, LNB, Receiver, PC, Software

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LRIT ProvidesDCS Data and GOES Imagery

• Visual & IR Images– Can be saved to TIFF, JPG, PNG– Automatic collection, zoom, geo-reference grid– Animations– Easy integration to web site

• DCS Data– LRGS ingests data from LRIT and merges with

other data sources you might have (DRGS, NOAAPORT, DOMSAT, DDS, etc.)

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Sutron LRIT Software with LRGS

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GOES Imagery Data

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Compare DOMSAT & LRITDOMSAT LRIT

Latency Minimal. DCP messages are sent individually as they arrive

Several seconds may be added as messages are aggregated into files, depending on the priority scheme configured by NOAA

Content DCS only DCS, GOES Imagery (VIS, IR, WV), EMWIN, More to come

Hardware 1.8m dish, legacy receivers getting difficult to procure

1.2m dish, receivers available from a number of vendors

Footprint Continental U.S. Only Entire GOES E & W (roughly the entire western hemisphere)

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DOMSAT Footprint

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Impact to Current DOMSAT Users

• Need to purchase: – Dish, LNB, Cable,– LRIT Receiver (We resell Dartcom),– Decommutation & Image Processing Software– PC (may be required, Dartcom requires Windows)

• Current Tempest LRGS Users:– No additional license costs– We will assist you to upgrade & re-configure

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For More Information

• Contact:– Email: tempest@sutron.com– Phone: (703) 406-2800– Web: http://www.sutron.com/products/ILEX.html

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