Compositing of MODIS Products
This presentation is the property of its rightful owner.
Sponsored Links
1 / 8

Stephanie L Haines and Frank LaFontaine June 12, 2007 PowerPoint PPT Presentation

Compositing of MODIS Products. Stephanie L Haines and Frank LaFontaine June 12, 2007. Introduction. Coastal NWS offices wanted high resolution SST product to address forecast problems Weather associated with land/sea breezes Off shore weather such as clouds, precipitation, temperatures etc.

Download Presentation

Stephanie L Haines and Frank LaFontaine June 12, 2007

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

Product compositing techniques for modis

Compositing of MODIS Products

Stephanie L Haines and Frank LaFontaine

June 12, 2007



  • Coastal NWS offices wanted high resolution SST product to address forecast problems

    • Weather associated with land/sea breezes

    • Off shore weather such as clouds, precipitation, temperatures etc.

  • Single pass of MODIS provides limited coverage

  • Simple composite generated from multiple passes of MODIS data provides spatially continuous cloud free coverage

    • Main assumption is that SST does not change significantly from one day to the next

    • High resolution (1 km), full coverage on a regional scale

    • Small scale features in SST gradients retained

  • Alternative to the Real-Time Global (RTG) SST analysis and/or the OSTIA analysis for model assimilation

  • Can also composite additional MODIS ocean color products such as chlorophyll



  • Use the 1km SST MODIS product to produce a detailed and spatially continuous SST field while minimizing cloud contamination and latency effects

    • Obtain SST in real-time from University of South Florida (USF)

    • Generate a SPoRT MODIS cloud mask for the same pass

  • Retain 5 clear (as determined by the cloud mask) SST values for each pixel separately for day and night

  • Average some of clear values to obtain a more consistent field

  • Evaluating the use of AMSR-E SST to reduce latency

Sst comparisons

SST Comparisons

Terra 04 UTC

Aqua 07 UTC

Terra 16 UTC

Aqua 19 UTC

  • MODIS SST composites generated 4 times daily at 1 km resolution

  • RTG-SST once daily 0.5 degree or 1/12 degree resolution

  • OSTIA once daily 5 km resolution

  • Loops available online at


0.5 degree


5 km

Work performed since last sac

Work Performed Since Last SAC

  • Operational domain expanded to include Central America and composites being provided to the SERVIR group

  • SST composites provided in near real time in GRIB (gridded binary) format for ease of use by modelers and additional users, used in several WRF modeling studies

  • Composites also provided to Mobile and Miami NWS offices within AWIPS

  • Journal article describing the method and validation for the May 2004 case, written and accepted for publication in the IEEE journal “Transactions on Geoscience and Remote Sensing”

  • SST composites provided to WorldWinds Inc.

  • Ocean color products obtained from USF and compositing work begun

Nasa products support marine weather

NASA Products Support Marine Weather


MODIS composite SST serves as a data source for hybrid marine products.


  • SPoRT provides WorldWinds Inc. MODIS SST composites for their analysis system

  • WorldWinds packages SST with other marine products for distribution by WxWorx Inc. (an affiliate of Baron Services)

  • In conjunction with XM Satellite Radio Inc., WxWorx provides up to date weather information for boat owners

    • PC based display software

    • hand-held applications

WxWorx, Inc. products available to marine customers

MODIS SST data reaches over 8000 users in the marine community!

Ocean color composites

Ocean Color Composites

  • Obtaining in real time from University of South Florida the following products

    • Chlorophyll

    • Total suspended matter

    • Fluorescence line height

  • Started work on compositing these products

    • Of the two most recent values for each pixel, use the largest value in the composite

  • Composites and single passes put on web

Single Pass of Aqua CHL

Aqua CHL Composite

Future work

Future Work

  • Continue to improve MODIS SST composites by

    • Improving latency by including AMSR-E SST in cloudy, non-coastal regions

    • Improve the SPoRT MODIS cloud mask for ocean applications

  • Improve the ocean color composites

    • Learn about the products from USF experts

    • Adjust the compositing techniques

  • Looking at generating West Coast composites (requested by WorldWinds). Requires near real time source of MODIS data – both SST and cloud mask

  • Provide ocean color composites to NWS offices, WorldWinds Inc.

  • Support field programs (ex. TCSP (summer 06), TC4 (summer 07)).

  • Proposals

    • WRF linked with coastal ocean model into the North Carolina Forecast System - NASA provide SST data and other remote sensing expertise. ROSES 2007 – Disaster Management. PI: Adel Hanna (UNC-Chapel Hill), Jedlovec and Haines Co-PIs

    • Daily Chlorophyll Products for Ecosystem and Fishery Applications, Co-PIs: Elizabeth Valenti (WorldWinds, Inc.) and Gary Jedlovec (NASA/MSFC) – RPC Council, May 2007.

  • Login