1. EOS/NPP DIRECT READOUT MEETING BENEVENTO OCTOBER 2005 Geoscience Australia 03/000 CRAIG SMITH CURRENT MODIS DB PRODUCTS AND FUTURE PLANS AT ACRES, GEOSCIENCE AUSTRALIA Australian Government Geoscience Australia

2. EOS/NPP DIRECT READOUT MEETING BENEVENTO OCTOBER 2005 Geoscience Australia ACRES MODIS NRT Online Products All Terra & Aqua day & night Passes acquired Available for 7-10 days at no charge, following User registration Level 1b and Map oriented (Lambert Conformal Projection) products available Browse JPEG - Bands 1,4,3 as RGB Metadata file - 1 for each spatial resolution set Map oriented products available in ENVI & ER Mapper format – allows for improved access for non-expert users Approximately 100 Terra Bytes per month of MODIS data being downloaded from ACRES ftp site

3. EOS/NPP DIRECT READOUT MEETING BENEVENTO OCTOBER 2005 Geoscience Australia ACRES MODIS Archive Products Product specifications similar to the NRT Online products Post pass ephemeris is used in the generation of archive products How do we generate additional value from the MODIS archive The value of ACRES 26 year Landsat archive increases every year – lessons for the MODIS archive! Opportunity to optimise the processing of the data, and improved information extraction, using local conditions and knowledge for improved higher level products Investigating the generation of higher level products, with consideration given to the institutional MODIS products available from the DAAC

4. EOS/NPP DIRECT READOUT MEETING BENEVENTO OCTOBER 2005 Geoscience Australia ACRES PRODUCTS & SERVICES Sentinel Project – Major operational application of NRT MODIS is the mapping of thermal anomalies (Hotspots) Almost complete raw data archive of MODIS, TERRA & AQUA, data MODIS complements our products and services from our archive of Landsat MSS, TM, & ETM, ERS, RADARSAT & JERS data Dedicated AVHRR reception facility in Alice Springs – NRT Online products available from ACRES then archived by CSIRO Discussions with AVHRR users about potential MODIS products Investigating the development of a grassland curing product Geoscience Australia is responsible the Oceania ALOS Data Node

5. EOS/NPP DIRECT READOUT MEETING BENEVENTO OCTOBER 2005 Geoscience Australia Canberra

6. EOS/NPP DIRECT READOUT MEETING BENEVENTO OCTOBER 2005 Geoscience Australia MODIS Data Processing Flow at ACRES – Part I Data acquisition at Alice and Hobart Direct Ingest System Raw data archive On SDLT RT-STPS PDS IMAPP at DAF Hot Spot algorithm Sentinel System T0T0 T 20 1.Tape archive at DPF 2.Tape transfer to DLI 3.Tape transfer to BoM T weekly

7. EOS/NPP DIRECT READOUT MEETING BENEVENTO OCTOBER 2005 Geoscience Australia MODIS Data Processing Flow at ACRES – Part II Data acquisition at Alice and Hobart Direct Ingest System RT-STPS PDS T0T0 Canberra WAN Online products T 2-8hr T 2hr IMAPP System

8. EOS/NPP DIRECT READOUT MEETING BENEVENTO OCTOBER 2005 Geoscience Australia

9. EOS/NPP DIRECT READOUT MEETING BENEVENTO OCTOBER 2005 Geoscience Australia MODIS DB R&D PROJECTS LOCATIONAL ACCURACY ASSESSMENT CLOUD COVER MASK (MOD35) ASSESSMENT ATMOSPHERIC AND BRDF CORRECTIONS

10. EOS/NPP DIRECT READOUT MEETING BENEVENTO OCTOBER 2005 Geoscience Australia MODIS LOCATIONAL ACCURACY Multi-temporal sub-pixel (250 m) registration of MODIS AQUA & TERRA data are important for most applications The locational accuracy specifications for TERRA MODIS data are about 50 m (1 σ) at nadir The accuracy specifications for NRT AQUA MODIS data are larger as AQUA has no on-board GPS capability The major determinant of the locational accuracy of MODIS products in a NRT environment is the accuracy of the ephemeris used in product generation Post past ephemeris are not available at the time of NRT product generation. The locational accuracy of ACRES NRT products are approaching the theoretical limit

11. EOS/NPP DIRECT READOUT MEETING BENEVENTO OCTOBER 2005 Geoscience Australia MODIS LOCATIONAL ACCURACY ACRES is implementing geometric quality assurance procedures for our MODIS products A sample of MODIS products are automatically assessed against a 2002 Landsat ETM+ mosaic of Australia, resampled to 250 metre pixel size An intensity based image matching technique is used to compare image chips taken from a regular grid of MODIS products with the database of Landsat image chips

12. EOS/NPP DIRECT READOUT MEETING BENEVENTO OCTOBER 2005 Geoscience Australia MODIS LOCATIONAL ACCURACY The mean error of ACRES NRT MODIS Terra and AQUA products is 50 and 200 metres respectively with a standard deviation of 135 and 160 metres respectively These figures are derived from a sample of all pixels (nadir & off nadir) Residuals will be used to update the geocoding information provide with the ENVI & ER Mapper formatted products

13. EOS/NPP DIRECT READOUT MEETING BENEVENTO OCTOBER 2005 Geoscience Australia MODIS CLOUD COVER MASK The Cloud Cover (CC) mask algorithm (MOD35) is being be verified for Australian conditions The design of the algorithm is conservative There are five groups of spectral tests. If one of the five group tests maps a pixel as cloudy or probably cloudy then the pixel will be labelled accordingly Currently investigating of the source of false positives The spectral band thresholds and ground cover types (desert, ocean etc) are the two main variables that are used to estimate cloud cover Investigating issues of modifying the threshold values in the spectral tests and Olsson land classification

14. EOS/NPP DIRECT READOUT MEETING BENEVENTO OCTOBER 2005 Geoscience Australia ATMOSPHERIC & BRDF CORRECTION A research project within the Co-operative Research Centre for Spatial Information - lead Participants are Geoscience Australia, Western Australia Dept of Land Information & Cutin University A major component of this project is validating, and applying dynamic corrections for atmospheric effects, water vapour MOD05, and aerosols MOD04 Dynamic inputs being derived from MODIS data with supporting information from the Australian Bureau of Meteorology This work is primarily being undertaken at Dept of Land Information and Curtin University, Perth Dynamic inputs for both:- DB Version of MOD09 SMAC code ( Rahman & Dedieu )

15. EOS/NPP DIRECT READOUT MEETING BENEVENTO OCTOBER 2005 Geoscience Australia MODIS 09/09/2003 01:27UTC 03:04UTC Top-Of-Atmosphere-Reflectance Bottom-Of-Atmosphere-Reflectance

16. EOS/NPP DIRECT READOUT MEETING BENEVENTO OCTOBER 2005 Geoscience Australia Taken from MOD09 ATBD Vermote and Vermeulen (1999) Flow chart of atmospheric correction algorithm H2O vapour is the primary focus of the current work

17. EOS/NPP DIRECT READOUT MEETING BENEVENTO OCTOBER 2005 Geoscience Australia Radiosonde Locations

18. EOS/NPP DIRECT READOUT MEETING BENEVENTO OCTOBER 2005 Geoscience Australia The algorithms produce a water vapour map over WA at 1km resolution. Precipitable Water (kgm -2 ) MODIS Terra 02:08 UTC 17/12/2004

19. EOS/NPP DIRECT READOUT MEETING BENEVENTO OCTOBER 2005 Geoscience Australia Validation of MODIS H2O algorithms Sobrino et al. WVNIR IMAPP Cloud MaskDLI Cloud Mask No Cloud Mask

20. EOS/NPP DIRECT READOUT MEETING BENEVENTO OCTOBER 2005 Geoscience Australia Analysis of data rejected by the cloud mask Choice of cloud mask may limit ‘good’ data by up to 25% DLI Cloud MaskIMAPP Cloud Mask

21. EOS/NPP DIRECT READOUT MEETING BENEVENTO OCTOBER 2005 Geoscience Australia Grazie Nov 2003 Apr 2004 NDVI South East Australia