Ver. # |
Production Start Date |
Product Updates |
Quality Transition |
Current
F11_0021 (aerosol), F06_0021 (land) |
06/01/2007 |
Data Product Specification Rev P.
Beginning with this version, MISR Level 2 products are generated in two
stages, designated "FIRSTLOOK" and "FINAL". See the
MISR Level 2
Aerosol/Surface Products Quality Statement for details about FIRSTLOOK and
FINAL processing.
AEROSOL:
- Revised Dark Water algorithm to use a common subregion location across all
channels.
- Revised calculation of mean angstrom exponent to use the mean optical depth
of successful mixtures rather than calculating a mean of angstrom exponent for
each individual mixture. The revised angstrom exponent and its uncertainty are
reported in RegBestEstimateAngstromExponent and
RegBestEstimateAngstromExponentUnc.
- Revised calculation of optical depth upper bound over water such that it
uses the maximum scaled optical depth in each channel rather than the
minimum.
- Increased albedo_thresh_land, used in calculating optical depth upper bound
over land, from an effective value of 0.003183 to 0.015.
- Changed Het algorithm parameter "first_eigenvalue_for_eofs" from
1 to 2.
- Added flag values "cloudy other channel" (14) and "too
bright other channel" (15), in RetrAppMask.
- Use more up-to-date snow/ice and surface windspeed information from the new
TASC dataset which is updated monthly. Aerosol FIRSTLOOK products (MIL2ASAF,
MIL2ASLF) use TASC from the same month of the prior year. The FINAL aerosol
products (MIL2ASAE, MIL2ASLS) use TASC generated for the current month in the
current year.
- Revised SMART dataset to use a maximum windspeed of 7.5 (rather than 10)
meters per second.
- Added SubrUsed field to aerosol product 1.1 km grid, indicating which
subregion locations were used in the retrieval.
- The following parameters are no longer reported (set to fill value):
- RegWgtdMeanSpectralOptDepth
- RegWgtdStDevSpectralOptDepth
- RegMeanAngstromExponent
- RegStDevAngstromExponent
- RegLowestResidAngstromExponent
New ancillary files:
- MISR_AM1_AS_SCI_CONFIG_F11_0019.txt
- MISR_AM1_SMART_*_F02_0010.hdf
- MISR_AM1_TASC_<month>__<year>_F02_03.hdf
New output product names for FIRSTLOOK products:
- MISR_AM1_AS_AEROSOL_FIRSTLOOK_P<path>_O<orbit>_F11_0021.hdf
- MISR_AM1_AS_LAND_FIRSTLOOK_P<path>_O<orbit>_F06_0021.hdf
FINAL products retain the original product names:
- MISR_AM1_AS_AEROSOL_P<path>_O<orbit>_F11_0021.hdf
- MISR_AM1_AS_LAND_P<path>_O<orbit>_F06_0021.hdf
|
|
Current
F10_0020 (aerosol), F06_0020 (land) |
08/1/2006 |
Data Product Specification Rev O.
AEROSOL:
New ancillary files:
- MISR_AM1_AS_SCI_CONFIG_F10_0018.txt
|
|
Current
F09_0019 (aerosol), F06_0019 (land) |
02/21/2006 |
Version number is incremented due to bug fixes in the Level-2 TC Stereo
and Classifiers products, which impact the Level-2 Aerosol / Surface cloud
screening algorithm.
Analysis of the effect of these changes, in the aerosol and land surface
retrievals, indicates no significant impact to the overall science data
quality.
|
|
F09_0018 (aerosol),
F06_0018 (land) |
12/1/2005 |
Data Product Specification Rev N.
AEROSOL:
- Updated component particle fractional amounts in ACP mixture file.
- Changed cloud screening logic, for polar scenes only, such that ASCM value
"ClearLC", and SDCM value "NearSurfaceLC" are both
considered cloudy, rather than clear.
New ancillary files:
- MISR_AM1_ACP_MIXTURE_F05_0020.hdf
- MISR_AM1_AS_SCI_CONFIG_F09_0017.txt
|
LAND:
- Stage 1 Validated: MRPV (BRFModParam), NDVI; LAI and FPAR
(excluding needleleaf forest)
|
F09_0017 (aerosol), F06_0017 (land) |
5/13/2005 |
Data Product Specification Rev M.
AEROSOL:
- The cloud screening logic is updated to improve discrimination between
clouds and snow/ice in polar regions.
- Input to the aerosol retrieval is now limited to the view area of the nadir
camera. This eliminates some cloud screening problems at the swath edges.
- Reporting of RetrAppMask and RegClassInd is expanded to include locations
where no retrieval is attempted.
- Coverage of BestEstimate fields is improved by using a 3x3 regional
averaging algorithm to fill gaps where retrievals are missing. The
BestEstimateQA flag value 2 is reported where 3x3 regional averaging was used.
- Renamed "BestFit" to "LowestResid" in aerosol product
field names.
- Use new histogram based algorithm for calculating single-scatter albedo
(SSA). This affects values calculated for the following fields:
RegMeanSpectralSSA, RegStDevSpectralSSA, RegBestEstimateSpectralSSA, RegBestEstimateSpectralSSAUnc
- Use new histogram based algorithm for calculating spherical/nonspherical
fractional amounts. This affects values calculated for particle types 4
(spherical) and 5 (nonspherical) for the following fields:
RegMeanSpectralOptDepthFraction, RegStDevSpectralOptDepthFraction,
RegMeanNumberFraction, RegStDevNumberFraction, RegMeanVolumeFraction,
RegStDevVolumeFraction, RegBestEstimateSpectralOptDepthFraction,
RegBestEstimateSpectralOptDepthFractionUnc, RegBestEstimateNumberFraction,
RegBestEstimateNumberFractionUnc, RegBestEstimateVolumeFraction,
RegBestEstimateVolumeFractionUnc
- Added new "HistogramCounts" and "HistogramMeans"
fields for single-scattering albedo (SSA); and nonspherical fractions,
including optical depth fraction, number fraction, and volume fraction.
- Removed the following median particle property fields:
RegMedianAngstromExponent, RegMedianSpectralSSA,
RegMedianSpectralOptDepthFraction, RegMedianNumberFraction,
RegMedianVolumeFraction.
LAND:
- Fixed major bug in MRPV retrieval code, affecting calulation of the
following parameters: BRFModParam1, BRFModParam2, and BRFModParam3. See the
Quality
Summary for more information.
- Input to the surface retrieval is now limited to the view area of the nadir
camera. This eliminates some undesirable edge artifacts in the surface retrievals.
- The following geometric parameter fields are added to the land surface
product: SolZenAng, ViewZenAng, RelViewCamAziAng, ScatterAng, and GlitterAng.
New ancillary files:
- MISR_AM1_CART_F01_0002.hdf
|
|
F08_0016 (aerosol), F05_0016 (land) |
11/28/2004 |
Data Product Specification Rev L.
AEROSOL:
- Mixture equivalent reflectance (RegBestFitMixtureEqRefl) is now reported.
Previously this field was present, but contained only fill value.
- The content of the APOP and mixture files is now copied into the aerosol
product in new Vgroups named "Component Particles Information" and
"Mixture Information". Included with this information are new
metadata attributes containing text format tables that provide a summary of the
component particle properties and mixture properties.
- Fixed minor bug in the calculation of subregional variability (SubrVar),
occuring only at locations where ellipsoid or terrain data quality indicator
(RDQI) is 1, which is very rare.
LAND:
- HDRF uncertainty is now reported for each camera and band, rather than
averaged over cameras. A new field LandHDRFUnc is added. The old field
LandHDRFUncCamAvg is removed.
- Fixed bug in calculation of BHR uncertainty (LandBHRRelUnc), occuring only
at locations where fewer than nine cameras are available. BHR uncertainty is
unchanged at locations where all nine cameras are available.
New ancillary files:
- MISR_AM1_ACP_APOP_F05_0014.hdf
- MISR_AM1_ACP_MIXTURE_F05_0019.hdf
|
LAND:
- Stage 1 Validated: surface radiative parameters: BRF, HDRF, DHR, and BHR
|
F07_0015 (aerosol),
F04_0015 (land) |
02/04/2004 |
Data Product Specification Rev K.
AEROSOL:
- 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.
LAND:
- Fix bug in LAIBestEstimateQA so that bad sun/view geometry is reported as 4
instead of 253.
New ancillary files:
- MISR_AM1_ACP_APOP_F04_0005.hdf
- MISR_AM1_ACP_MIXTURE_F04_0007.hdf
|
AEROSOL:
- Beta: aerosol single-scattering albedo, aerosol particle size and
shape fractional amounts
|
F07_0014 (aerosol), F04_0014 (land) |
12/08/2003 |
Versions F07_0014 and F04_0014 were removed from the archive because they
contained radiometric errors. Do not use!
|
|
F06_0013 (aerosol), F04_0013 (land) |
8/13/2003 |
Data Product Specification Rev J.
AEROSOL:
- 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.
LAND:
- 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.
New ancillary files:
- MISR_AM1_AS_SCI_CONFIG_F08_0015.txt
|
AEROSOL:
- Beta: aerosol Angstrom exponent
LAND:
- Provisional: BHRPAR and DHRPAR
|
F05_0012 (aerosol), F03_0012 (land) |
1/26/2003 |
Data Product Specification Rev I.
AEROSOL:
- Add stricter constraint to aerosol retrievals over heterogeneous
surfaces.
LAND:
- Fix bug which caused some FPAR values to be reported with anomalously high
values.
New ancillary files:
- MISR_AM1_AS_SCI_CONFIG_F07_0014.txt
|
AEROSOL:
- Stage 2 Validated: aerosol optical depth over heterogeneous surfaces
and dark water
|
F05_0011 (aerosol), F03_0011 (land) |
11/27/2002 |
Data Product Specification Rev H.
Many updates incorporated into aerosol and land surface products. For
details see:
Release
Desc.
New ancillary files:
- MISR_AM1_AS_SCI_CONFIG_F06_0011.txt
|
AEROSOL and LAND:
- Provisional: LAI and FPAR
|
F04_0010 (aerosol), F02_0010 (land) |
11/12/2002 |
Data Product Specification Rev G.
AEROSOL:
- Add Level 1 orbit-QA flag to product.
LAND:
- Add Level 1 orbit-QA flag to product.
|
|
F03_0009 (aerosol), F01_0009 (land) |
09/25/2002 |
Data Product Specification Rev F.
New ancillary files:
- MISR_AM1_AS_SCI_CONFIG_F05_0009.txt
|
AEROSOL and LAND:
- Beta: LAI and FPAR parameters
|
F03_0008 (aerosol), F01_0008 (land) |
06/26/2002 |
Data Product Specification Rev F.
AEROSOL:
- 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.
LAND:
- Two parameters (chisquare-smooth and HDRF uncertainty) were modified
to remove their dependency upon the ARP.
New ancillary files:
- MISR_AM1_AS_SCI_CONFIG_F05_0007.txt
- MISR_AM1_CART_F01_0001.hdf
|
AEROSOL:
- Beta: Aerosol parameters retrieved using algorithm for homogeneous
surfaces.
- Provisional: All aerosol parameters except those retrieved using
algorithm for homogeneous surfaces.
LAND:
- Beta: Land surface radiation parameters for PAR spectral
regions.
- Provisional: All land surface radiation parameters except those for
PAR spectral regions.
|
F03_0007 (aerosol), F01_0007 (land) |
04/15/2002 |
Data Product Specification Rev E.
Major upgrade to Level 2 aerosol product, incorporating
several changes and additions. For details see:
Release Desc.
New ancillary files:
- MISR_AM1_ACP_MIXTURE_F03_0006.hdf
- MISR_AM1_ACP_APOP_F03_0004.hdf
- MISR_AM1_AS_SCI_CONFIG_F04_0006.txt
|
|
F02_0006 (aerosol), F01_0006 (land) |
09/27/2001 |
Data Product Specification Rev D.
Major upgrade to Level 2 aerosol product, incorporating
several changes and additions. For details see:
Release
Desc.
New ancillary files:
- MISR_AM1_AS_SCI_CONFIG_F03_0003.txt
|
|
F01_0005 (aerosol & land) |
06/14/2001 |
Increase accuracy of numerical constants involving pi, in order to fix
numerical error occurring over international dateline crossing. |
|
F01_0004 (aerosol & land) |
03/30/2001 |
AEROSOL:
- Replace illegal value (0) found in AerCompModId field of aerosol product
with valid fill value (253).
LAND:
- 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).
|
|
Baseline: F01_0003 (aerosol) |
02/16/2001 |
Initial baseline for all Level 2 Aerosol/Surface products available for
public release.
New ancillary files:
- 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
|
AEROSOL and LAND:
- Beta: all aerosol parameters, all land surface radiation
parameters
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