The Land, Atmosphere Near-real-time Capability for EOS(LANCE)

GES DISC UWGMay 10-11, 2011

Karen MichaelEOSDIS System ManagerKaren.Michael@nasa.gov

301-614-5286

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What is LANCE?

• LANCE was initiated by the NASA Flight, Research, and Applied Sciences Programs in order to ensure the availability of NASA satellite data products to those partners who have grown to rely upon NASA for data for their decision support systems.

• LANCE will also provide a developmental processing capability for the prototyping of new and innovative NRT products to encourage the use of NASA technologies by new users.

• LANCE has been implemented with a distributed approach and consists of Near-real-time systems that are managed by ESDIS and developed by the GES DISC, OMI SIPS, AMSR-E SIPS, MLS SIPS and MODAPS

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LANCE Overview

• All LANCE data originates from the Terra, Aqua, and Aura spacecraft. • Terra provides MODIS data; Aqua provides MODIS, AMSR-E, and AIRS data;

Aura provides OMI and MLS data. • Terra data is down-linked to White Sands, New Mexico via TDRSS • Aqua and Aura data are down-linked to the Polar Ground Stations (PGS) in

Norway and Alaska. • Data from all three spacecraft are processed by the EOS Data and Operations

System (EDOS) to Level 0 and distributed to LANCE in near-real-time typically within 85-130 minutes of observation.

• EDOS generates 2 basic types of products:– Contact/Session Based Products (typically used for NRT processing)

Rate Buffered Data Sets (RBD) Session Based PDS Data Sets (S-PDS)

– Time Based Products (typically used for standard science processing) Production Data Sets (PDS) Expedited Data Sets (EDS)

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LANCE System Architecture

TERRA

AQUA / AURA

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LANCE Home Page

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LANCE Data Access and Applications

• LANCE Data Access– Data are provided by ftp access or by subscription– Short-term archives of at least 7 days are provided on the ftp servers– Data Products are freely available to registered users – a single

username and password works for all LANCE resources– Each element currently provides User Support through existing

resources – The LANCE website at http://lance.nasa.gov provides access to data

and information concerning the element products including:Performance MetricsBrowse ProductsAlgorithm versions and comparison of the near-real time products with

the standard, science-quality products• The present application areas include:

– Hurricanes, Volcanoes, Floods, Fires, Oil Spills, Dust Storms, Air Quality, Snow/Ice, and Weather

• Present customers include: JPL, Langley, GSFC, NOAA, FNMOC, NAVO, NRLSSC, NRLMRY, AFWA, USGS, ECMWF, IMO, SSEC, UAH, METO, Brazil, Denmark

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LANCE Data Products

• Data Products

Instrument Product Categories Average Latency

AIRS Radiances, Temperature and Moisture Profiles, Clouds and Trace Gases

75-140 minutes

MLS Ozone, Temperature 75-140 minutes

MODIS Radiances, Clouds/Aerosols, Water Vapor, Fire, Snow, Sea Ice, Land Surface Reflectance (LSR), Land Surface Temperature

90-140 minutes excluding the L2G and L3 daily, tiled LSR products

OMI Ozone, Sulfur Dioxide, Aerosols, Cloud Top Pressure

100-165 minutes excluding L3 products

AMSR-E Brightness Temperature, Soil Moisture, Rain Rate, Ocean Products, Snow Water Equivalent, Sea Ice

80-135 minutes excluding L3 products

The Land, Atmosphere Near-real-time Capability for EOS(LANCE)

GES DISC Components

Bruce VollmerBruce.E.Vollmer@nasa.gov

301-614-5373

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LANCE Elements at GES DISC

• Summary of Products –AIRS L1B (VIS/NIR radiances, microwave brightness temps)

AIRS L1B channel subsets available in BUFR–AIRS L2 (standard retrieval, cloud cleared radiances, support

product)–AIRS images via WMS (VIS radiances, CO, Bt_diff_SO2,

Dust score)

–MLS L2 (Temperature, Ozone)

• Metrics– Latency

Data available within 80-140 minutes of observation 98% of data available within 3 hours of observation (average month)

– Distribution 150 – 200 K files per month 0.8 – 1.2 TB per month

Overview (2)

• NRT versus Standard– AIRS

Version 5 algorithms running in both systems (same code) Predicted ephemeris used in NRT system

– MLS MLS NRT Temperature and Ozone data lower quality than standard products Streamlined L2 algorithm utilized to meet latency requirements NRT products are 15 minute granules; standard products are daily files

• Redundancy Status – Dual RBD feed from EDOS– Two servers for each function (acquisition, processing, distribution)– Data acquisition, processing servers on single UPS served by redundant PDUs– Distribution servers on separate UPSs served by redundant PDUs– All servers on a redundant network

Multiple firewalls, switches, routing)– Automated fault detection, manual failover

• User Support– Help-disc@listserv.gsfc.nasa.gov– 301-614-5224 11

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15Carbon monoxide from AIRS from Russian wildfires

User Registration

• Initially all NRT data available via anon ftp• Implemented August 2010

–Users self register– Initially a hand full of NRT data users

• Current• 54 registered users• 34 AIRS, 14 MLS, 1 Aqua ephemeris

• Benefits• Usage metrics, timely dissemination of information

• Issues • Clients (e.g., Panoply) can not authenticate with URS server

• LDAP: Lightweight Directory Access Protocol

Future

• Transition of GES DISC NRT web site to LANCE web site

• Datacast feed for selected NRT products

• Combined data/services available from Rapid Response System

• Ex: AIRS, OMI, MODIS volcanic activity

• MLS product quality improvements, additional water vapor product

• AIRS Version 6 in LANCE AIRS• Performance vs product quality