MISR Level 2 Aerosol and Land Versioning

• Stage 2 Validated: AEROSOL - aerosol optical depth over heterogeneous surfaces and dark water
• Provisional: LAND
• Beta: AEROSOL - aerosol optical depth over homogeneous surfaces, aerosol Angstrom exponent, aerosol single-scattering albedo, aerosol particle size and shape fractional amounts

Data Product Specification Rev K.

• Additional parameters - aerosol product: single-scattering albedo parameters; aerosol particle size and shape fractional amounts reported by spectral optical depth, by number, and by volume; median Angstrom exponent over a region; best estimates for spectral optical depth, Angstrom exponent, single-scattering albedo, and aerosol particle size and shape fractions; new QA field, RegBestEstimateQA, reporting how best estimates were calculated.
• Fix minor bug in computation of RegStDevAngstromExponent.

• Fix bug in LAIBestEstimateQA so that bad sun/view geometry is reported as 4 instead of 253.

• MISR_AM1_ACP_APOP_F04_0005.hdf
• MISR_AM1_ACP_MIXTURE_F04_0007.hdf

• Beta: aerosol single-scattering albedo, aerosol particle size and shape fractional amounts

Data Product Specification Rev J.

• Added Angstrom exponent fields
• Reorganize parameters in science configuration file to improve readability.
• Add An camera acquisition time to per-block metadata.
• Add product version number attribute to ECS core metadata.

• Additional fields: biome type, biome and LAI best estimate fields, flag legend vdatas
• FPAR, BHRPAR and DHRPAR fields changed from regional to subregional resolution, and update fields in land surface QA file accordingly.
• Fix bug in reporting of LAI saturation condition, and change type of LAIDelta1 and LAIDelta2 from integer to float.
• Change criterion for selecting biome type for FPAR calculation: use biome with smallest LAI coefficient of variation (= LAIDelta2 /LAIMean2) instead of LAIDelta2.
• Add An camera acquisition time to per-block metadata.
• Add product version number attribute to ECS core metadata.

• MISR_AM1_AS_SCI_CONFIG_F08_0015.txt

• Beta: aerosol Angstrom exponent

• Provisional: BHRPAR and DHRPAR

Data Product Specification Rev I.

• Add stricter constraint to aerosol retrievals over heterogeneous surfaces.

• Fix bug which caused some FPAR values to be reported with anomalously high values.

• MISR_AM1_AS_SCI_CONFIG_F07_0014.txt

• Stage 2 Validated: aerosol optical depth over heterogeneous surfaces and dark water

Many updates incorporated into aerosol and land surface products. For details see: Release Desc.

• MISR_AM1_AS_SCI_CONFIG_F06_0011.txt

• Provisional: LAI and FPAR

Data Product Specification Rev G.

• Add Level 1 orbit-QA flag to product.

• Add Level 1 orbit-QA flag to product.

Data Product Specification Rev F.

• MISR_AM1_AS_SCI_CONFIG_F05_0009.txt

• Beta: LAI and FPAR parameters

Data Product Specification Rev F.

• The calculation of optical uncertainty over heterogeneous surfaces was modified. The calculation of chisquare-geometric was modified. Determination of a region's suitability for the algorithm to retrieve aerosols over heterogeneous surfaces was changed: instead of using a surface contrast threshold, a new test is used which is based on a weighted mean equivalent reflectance threshold. A regional angular correlation screening test was added to aerosol retrievals over land. Success of aerosol retrievals over land is now dependent upon the spread in optical depths retrieved per band. Minor field name changes were implemented in the aerosol QA file and the aerosol flag legends vdata.

• Two parameters (chisquare-smooth and HDRF uncertainty) were modified to remove their dependency upon the ARP.

• MISR_AM1_AS_SCI_CONFIG_F05_0007.txt
• MISR_AM1_CART_F01_0001.hdf

• Beta: Aerosol parameters retrieved using algorithm for homogeneous surfaces.
• Provisional: All aerosol parameters except those retrieved using algorithm for homogeneous surfaces.

• Beta: Land surface radiation parameters for PAR spectral regions.
• Provisional: All land surface radiation parameters except those for PAR spectral regions.

Major upgrade to Level 2 aerosol product, incorporating several changes and additions. For details see: Release Desc.

• MISR_AM1_ACP_MIXTURE_F03_0006.hdf
• MISR_AM1_ACP_APOP_F03_0004.hdf
• MISR_AM1_AS_SCI_CONFIG_F04_0006.txt

Major upgrade to Level 2 aerosol product, incorporating several changes and additions. For details see: Release Desc.

• MISR_AM1_AS_SCI_CONFIG_F03_0003.txt

Increase accuracy of numerical constants involving pi, in order to fix numerical error occurring over international dateline crossing.

• Replace illegal value (0) found in AerCompModId field of aerosol product with valid fill value (253).

• Fix bug affecting BRF fields in land surface product so that correct fill values (253 and 65533) are used instead of incorrect values (126 and 0).

Initial baseline for all Level 2 Aerosol/Surface products available for public release.

• MISR_AM1_ACP_APOP_F02_0002.hdf
• MISR_AM1_ACP_MIXTURE_F02_0003.hdf
• MISR_AM1_AGP_Pxxx_F01_24.hdf
• MISR_AM1_ARP_INFLTCAL_T006_F02_0001.hdf
• MISR_AM1_ARP_CONFIG_F02_0002.hdf
• MISR_AM1_ARP_PRFLTCAL_F02_0004.hdf
• MISR_AM1_ARP_PRFLTCHAR_F02_0002.hdf

• Beta: all aerosol parameters, all land surface radiation parameters