the land atmosphere near real time capability for eos lance l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
The Land, Atmosphere Near-real-time Capability for EOS (LANCE) PowerPoint Presentation
Download Presentation
The Land, Atmosphere Near-real-time Capability for EOS (LANCE)

Loading in 2 Seconds...

play fullscreen
1 / 22

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


  • 133 Views
  • Uploaded on

The Land, Atmosphere Near-real-time Capability for EOS (LANCE). Ed Masuoka Code 614.5 GESDIS Combined Branch Meeting 2-2-2010. What is LANCE?.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'The Land, Atmosphere Near-real-time Capability for EOS (LANCE)' - kitty


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
the land atmosphere near real time capability for eos lance

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

Ed Masuoka

Code 614.5

GESDIS Combined Branch Meeting

2-2-2010

what is lance
What is LANCE?
  • Building on existing EOSDIS elements (MODAPS/LAADS; OMI SIPS, GES DISC), provides data from MODIS, OMI, AIRS, MLS, and AMSR-E instruments in near real-time (< 3 hours from observation)
  • Utilizes PGE Code from Standard Science Products, but:
    • All products generated with a “nrt” extension to distinguish them from standard products
    • Requirements for ancillary data inputs have been relaxed (e.g., MODIS cloud mask, land surface reflectance, aerosols, and clouds)
  • High operational availability achieved by:
    • Extra compute and ftp servers
    • Redundant power sources
    • Redundant production strings on separate networks (in progress)
  • Applications of LANCE data include:
    • Numerical weather & climate prediction/forecasting
    • Monitoring of Natural Hazards
    • Disaster Relief
  • Agriculture
  • Air quality
  • Homeland Security
slide3

LANCE Architecture

LANCE Architecture

Protocols: HTTP/FTP

Users

GES DISC

EDOS

Level Zero Processing Facility

Data Available:

-AIRS L1 and L2

-MLS L2

Format: RBD

AIRS

GMAO

Format: RBD

MLS

NRL

Protocols: HTTP/FTP

MODAPS

SPoRT

Data Available:

-MODIS L1, L2, L2G

and selected L3

-AMSR-E L1, L2 and L3

Format: S-PDS

MODIS

UMBC

Format: RBD

AMSR-E

USGS

Protocols: HTTP/FTP

Others

OMI SIPS

Data Available:

-OMI L1B and L2

Format: RBD

OMI

Transfer latency: bandwidth dependent

Observation to availability latency: 30-180 min.

LANCE Element Under Development

Operating LANCE Element

RBD: Rate Buffered Data

S-PDS: Session Based Production Data Set

lance modis architecture
LANCE-MODIS Architecture

ftp server

nrt1

Scheduling host

modnrt1

Gigabit Ethernet switch

Database

server

modnrt1db

RAID 6 Storage

modnrt1

Compute servers

nrt1min101-115

2nd string to deployed in Spring, 2010

DOORS

EMSnet Mission Network

Science and Engineering Network

nrt2

PDR server

PDR server

modpdr01

Browse

Server

  • High Operational Availability achieved by:
  • 1. Redundant power:
    • 2 sources of conditioned power (UPS 9 and 10) for each component
  • 2. Extra compute and ftp servers (Dell 2950)
    • 15 servers (2 can fail w/o impact to production)
    • 2nd ftp server (currently manual fail-over)
  • 3. Redundant production strings on separate networks
comparison of modis standard and nrt products
Comparison of MODIS Standard and NRT Products

Land Surface Reflectance over Midwest. Slightly more haze is visible in NRT view West of Great Lakes.

Standard Processing

Near-Real-Time Processing

comparison of modis standard and nrt products9
Comparison of MODIS Standard and NRT Products

Cloud top temperature over the Midwest. Thin clouds over lake Superior show sensitivity to GDAS ancillary data

Standard Processing

Near-Real-Time Processing

comparison of modis standard and nrt products10
Comparison of MODIS Standard and NRT Products
  • For LSR the Match is the percentage of NRT data with <1% error margin when compared to the operational Collection 5 codes
  • For Snow, Sea Ice, and Fire, the Match is the exact pixel to pixel match between NRT and operational Collection 5 codes
  • Omission and Commission errors are computed as a percentage of the snow,sea ice, fire in the operational Collection 5 products
slide11

AIRS L1 Product Quality

AIRS Level1-B VIS/NIR Quick Browse Image

Standard Product

Near-Real Time

11

airs nrt data product quality
AIRS NRT Data Product Quality
  • Same PGEs used to produce Standard Data Products used in NRT processing
  • NRT L1 data nearly identical to L1 Standard Product
    • Some minor differences in geolocation due to use of predicted ephemeris
    • Occasional minor differences in granules along contact session boundaries (~0.1 K)
    • Processing option: retain data at session boundaries to ensure data overlap when generating L1B
    • To date data latency has superseded minor quality improvement
  • NRT L2 products compare favorably to the L2 Standard Data Products.
    • NRT system uses surface climatology in place of dynamic ancillary data (GFS) as input to science data processing
    • Surface Air Temperature differences within 1 K for areas where sfc pressure is approximated by climatology, otherwise differences can be as much as 10 K in selected areas
    • Total Water Vapor differences within 5% over most of the globe; as much as 15 -20% where large surface pressure differences are observed, particularly at high latitudes
lance modis data access and services
LANCE-MODIS Data Access and Services
  • LANCE-MODIS Web Site
    • URL: http://LANCE-MODIS.eosdis.nasa.gov
    • Provides access to a wide variety of information including; MODIS ftp site, registration, latencies, metrics, PGE versions and production rules, data outages, and access to other LANCE systems
    • Provides access to land and atmospheres browse products
      • 7 days of browse products are maintained in rolling archive
  • User Registration
    • Registration is required before data may be accessed
    • Present registration process is temporary pending the development of an EOSDIS-wide user registration system
    • URL: https://LANCE-MODIS.eosdis.nasa.gov:8080
  • User Data Access
    • Subscriptions
      • Provide data directly as available (push)
    • Direct access to public
      • Download from directories (pull)
      • Hostname: nrt1.modaps.eosdis.nasa.gov; Directory Path: allData/1/esdtx/year/dataday
      • 7 days of data products are archived in a rolling archive
lance airs mls user access and data services
LANCE-AIRS/MLS User Access and Data Services
  • 5 day rolling archive available
  • FTP
    • Pull (anonymous, subscription)
    • Push (subscription)
  • Near Real Time Data Web Site
    • http://disc.gsfc.nasa.gov/nrt
  • Currently no format conversion or subsetting offered for NRT data products
  • Spatially qualified subscriptions available
  • Web Map Service (WMS) offered for AIRS NRT products
    • L1 visible radiances
    • CO concentration
    • SO2 indicator
slide16

eMODIS System

USGS/EROS

Example Application: eMODIS Africa Expedited Product Flow

T+12hrs

USGS FEWS NET Processing System (stack, smooth, create products)

Terra MODIS

T+9hrs

EW&EM NDVI and Anomaly Maps

EDOS

FEWS NET Decision Support System

(USAID FFP)

MODIS L0 Data

T+3hrs

MODIS

L2 Data

Input Data Deadline: Tuesday 10:00 a.m.

FEWS Impact Assessment Maps

LANCE

EW&EM/FEWS NET Desired/required 24 hour or less data delivery schedule

November 2009

proposed modifications to lance modis
Proposed Modifications to LANCE-MODIS

17

  • Following the LANCE Workshop in December, the following changes to LANCE-MODIS are being planned/considered:
    • Addition of a redundant system using different power and on a different network
    • Adding a Land Surface Reflectance product
    • Adding the AMSR-E products
    • Adding a variety of sub-setting capabilities
    • Adding re-projection and mosaicing capabilities
    • Adding a variety of data formats (e.g. GeoTiff)
    • Integration of the Rapid Response System with LANCE-MODIS
    • Generate products derived from Land Surface Temperature to support the Flood Mapping program
slide21

NRT Datatypes available from GES DISC

1All datatypes appended with _NRT to denote difference from production datatypes

product dependencies on ancillary data
Product Dependencies on Ancillary Data
  • The L2 codes search back for ancillary data a maximum of the times indicated on the arrows
  • The L2 Snow, Sea Ice, and Fire do not use ancillary data products

Cloud Mask

L2 Aerosols

84h

120h(optional)

14d

72h

21d

36h

GFS

REYNSST

SeaIce

NISE

GDAS

TOAST

120h

14d

14d

8d

7d

60h

L2 LSR

L2 Cloud

Ancillary Data

UnchangedFrom Standard

PGE