AMSR-E Data Versions
This page provides details of the processing and algorithm history for all versions of AMSR-E data products. For an explanation of version naming conventions such as product maturity codes and validation stages, refer to the Naming Conventions section of this page. For information about major instrument data loss periods, see the Instrument Data Loss Periods page.
Naming Conventions
Identifying Version Numbers
Depending on the order data method you use, the version number will appear differently at the end of the product name.
If you order the data from Earthdata Search, for example, the version number (V002 in this case) is written at the end of the data set title:
AMSR-E/AQUA MONTHLY L3 GLOBAL SNOW WATER EQUIVALENT EASE-GRIDS V002.
If you order data from the Data Pool HTTPS directory, the version number is written at the end of the data set short name:
AE_MoSno.002.
Product Maturity Codes
AMSR-E data file names include a product maturity code (such as B01, T02, or V03) to indicate which version of the algorithm was used to produce the data. The product maturity code includes both a maturity level (P, R, B, T, or V) and a two-digit iteration number, such as B06 in the following example file name: AMSR_E_L3_SeaIce25km_B06_20080207.hdf.
Table 1 describes each product maturity level.
Level | Description |
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P | Preliminary - refers to non-standard, near-real-time data available from NSIDC. These data are only available for a limited time until the corresponding standard product is ingested at NSIDC. |
R | Near-Real-Time - refers to near-real-time data produced and distributed via the NASA Land Atmosphere Near-real-time Capability for EOS (LANCE) data system. |
B | Beta - indicates a developing algorithm with updates anticipated. |
T | Transitional - period between beta and validated where the product is past the beta stage, but not quite ready for validation. This is where the algorithm matures and stabilizes. |
V | Validated - products are upgraded to Validated once the algorithm is verified by the algorithm team and validated by the validation teams. Validated products have an associated validation stage. Refer to Table 2 for a description of the stages. |
Validation Stage
Additionally, a stage (1, 2, or 3) may be appended to the product maturity code of Validated, such as V09-Stage3. Table 2 describes each validation stage.
Validation Stage | Description |
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Stage1 | Product accuracy is estimated using a small number of independent measurements obtained from selected locations, time periods, and ground-truth/field program efforts. |
Stage2 | Product accuracy is assessed over a widely distributed set of locations and time periods via several ground-truth and validation efforts. |
Stage3 | Product accuracy is assessed, and the uncertainties in the product are well established via independent measurements made in a systematic and statistically robust way that represents global conditions. |
Data Products and Version Details
Current Version: | Version 3 (V003) |
Maturity Details: | N/A |
Temporal Coverage: | 2002-06-01 (17:24) to 2011-10-04 (06:03) |
Version Changes: | The improved V003 AMSREL1A product features empirical corrections to the co-registration parameters A1 and A2, and an updated parameter file used for correcting the AMSR-E 89 GHz position information. As a result, Version 3 AMSREL1A data provide improved accuracy for the following: Latitude and Longitude, land/ocean flags, earth incidence angle, earth azimuth angle, sun azimuth angle, and sun elevation angle. Additionally, the HDF-EOS version was updated from 4.2r1 to 4.2r4. |
2002-06-19 (06:15) to 2011-09-27 (05:57) | The V002 AMSREL1A product features empirical corrections to the Aqua scan azimuth and satellite flight direction. With corrected sun azimuth, sun elevation, earth azimuth, and earth incidence angles, the geometric accuracy of AMSR-E 89 GHz data improved to within 2 km, compared to Version 1 AMSREL1A data. |
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Version 1 Processing and Algorithm History
2002-06-22 (00:11) to 2005-03-01 (00:14) | Original at-launch version of data. |
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Current Version: | Version 4 (V004) |
Maturity Details: | V13-Stage 3 |
Temporal Coverage: | 2002-06-01 (00:11) to 2011-10-04 (06:03) |
Version Changes: |
Complete recalibration to RSS Version 8 standard, as follows:
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V12-Stage3: 2011-01-26 (09:40) to 2011-10-03 (21:49) |
Complete recalibration to RSS Version 7 standard, as follows:
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V11-Stage3: 2011-01-26 (09:40) to 2011-10-03 (21:49) |
Updated the product maturity code to include R, for near-real-time data. There were no changes to the science algorithm in this version. |
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V10-Stage3: 2002-06-19 (00:29) to 2011-01-26 (09:41) |
Changes included in this version are:
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V09-Stage3: 2002-06-19 (00:29) to 2009-04-16 (04:11) |
This version corrects the errors in the resampled 89.0 GHz Horizontal data fields (89.0H_Res.#_TB) which were discovered in March 2008. Only V08 files from 19 June 2002 00:29 through 4 November 2004 05:43 contained the bad data. For more information, please see the AMSR-E L2A Brightness Temperatures: Bad Resampled 89 GHz Horizontal Data news brief on the AMSR-E News page. |
V08-Stage3: 2002-06-19 (23:40) to 2008-03-07 (00:30) |
This validated version of the algorithm includes updated global attributes and inventory metadata to reflect a version change from B07 to V08. There were no changes to the science algorithm from B07 to V08. |
Version 1 Processing and Algorithm History
B07: 2006-03-21 (04:16) to 2006-08-01 (00:29) |
The purpose of this algorithm is to:
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B06: 2005-09-28 (05:41) to 2006-03-21 (04:16) |
Corrected rounding error in the RangeEndingTime swath attribute and metadata item. |
B05: 2002-06-19 (06:15) to 2011-09-27 (05:57) |
Changes to this algorithm include:
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B04: 2005-03-01 (00:14) to 2005-08-15 (10:13) |
Changes to this algorithm include:
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B03: 2005-01-02 (00:27) to 2005-03-01 (00:14) |
Offers improved calibration because the coefficients no longer depend on SSM/I or TMI. Data are also closer to real time. AE_L2A continues to derive data from the AMSR-E 89 GHz-B feedhorn because of problems with the 89 GHz-A feedhorn. |
B02: 2004-11-04 (00:46) to 2005-01-02 (00:27) |
Corrects problems with the AMSR-E 89 GHz A-feedhorn by producing data from the 89 GHz B-feedhorn only. |
B01: 2002-06-18 (23:40) to 2004-11-04 (00:46) |
Original at-launch version of data. |
Current Version: | Version 2 (V002) |
Maturity Details: | V10-Stage 1 |
Temporal Coverage: | 2010-10-19 (23:59) to 2011-10-3 (21:49) |
Version Changes: | Updated the product maturity code to include R, for near-real-time data. There were no changes to the science algorithm in this version. |
V09-Stage1: 2002-06-19 (00:29) to 2010-10-20 (00:00) |
Updated the product maturity code status to Validated. There were no changes to the science algorithm in this version. |
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T08: 2004-07-03 (16:50) to 2008-12-05 (02:55) |
Changed the processing code to produce only a QA file when there is no L2A brightness temperature data qualified for retrieval. There were no changes to the science algorithm in this version. Only being used for reprocessing. T06 is still being used in forward processing. |
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T07: 2002-06-19 (00:29) to 2004-07-03 (16:51) |
Converted the algorithm code to run on Linux. There were no changes to the science algorithm in this version. |
T06: 2007-04-19 (21:24) to 2008-07-06 (00:24) |
Updated the product maturity code status to Transitional (T). There are no algorithm changes from version B05 to T06. |
Version 1 Processing and Algorithm History
B05: 2006-03-10 (09:31) to 2007-04-19 (21:25) |
Updates to accommodate the L2A version B07 format changes. |
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B04: 2002-06-18 (23:40) to 2006-03-10 (09:31) |
Update L2A reader for version 5 L2A. |
B03: 2005-06-02 (23:37) to 2005-08-25 (00:57) |
Minor modification to the soil moisture QC within the science code. |
B02: 2005-02-09 (22:04) to 2005-06-29 (04:21) |
Changes to this algorithm include:
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B01: 2002-06-18 (23:40) to 2005-02-09 (22:05) |
Original at-launch version of data. |
Current Version: | Version 2 (V002) |
Maturity Details: | V07-Stage 1 |
Temporal Coverage: | 2010-08-27 (00:36) to 2011-10-3 (21:49) |
Version Changes: | Updated the product maturity code to include R, for near-real-time data. There were no changes to the science algorithm in this version. |
V06-Stage1: 2002-06-19 (00:29) to 2010-08-27 (00:37) |
Updated the product maturity code status to Validated. There were no changes to the science algorithm in this version. |
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T05: 2002-06-19 (00:29) to 2008-12-01 (00:02) |
Changes included in this version are:
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Version 1 Processing and Algorithm History
B04: 2007-04-19 (00:42) to 2008-07-06 (00:24) |
Accommodates L2 Land transitional file input. |
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B03: 2002-06-18 (23:40) to 2007-04-19 (12:49) |
Corrects structural metadata error, introduced in B02, in which the corner coordinates were incorrectly expressed in degrees. This caused any geolocation function or software that used the HDF-EOS library, including spatial subsetting via the NASA Warehouse Inventory Search Tool (WIST), to return erroneous results. In B03, the corner coordinates are properly expressed in meters. |
B02: 2005-02-15 to 2005-09-05 |
Input Level-2B product uses full swath (243 pixels). Combines Surface Type and Inversion QC Flag 1 from the Level-2B product to form the Inversion QC Flag field. |
B01: 2002-06-18 to 2005-02-22 |
Original at-launch version of data. |
Current Version: | Version 2 (V002) |
Maturity Details: | V07-Stage 2 |
Temporal Coverage: | 2010-10-19 (23:59) to 2011-10-3 (21:49) |
Version Changes: | Updated the product maturity code to include R, for near-real-time data. There were no changes to the science algorithm in this version. |
V06-Stage2: 2002-06-19 (00:29) to 2010-10-20 (00:00) |
Converted the algorithm code to run on Linux. There were no changes to the science algorithm in this version. |
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V05-Stage2: 2007-05-09 (02:52) to 2008-07-06 (00:24) |
Changes included in this version are:
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Version 1 Processing and Algorithm History
B04: 2006-03-10 (09:31) to 2007-05-09 (02:52) |
Updates to accommodate the L2A version B07 format changes. |
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B03: 2002-06-18 (23:40) to 2006-03-10 (09:31) |
Changes to this algorithm include:
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B02: 2005-02-07 (23:56) to 2005-08-23 (04:27) |
Updated the L2A reader in preparation for version B04 L2A. |
B01: 2002-06-18 (23:40) to 2005-02-07 (23:56) |
Original at-launch version of data. |
Current Version: | Version 2 (V002) |
Maturity Details: | V05-Stage 2 |
Temporal Coverage: | 2010-08-27 (00:36) to 2011-10-3 (21:49) |
Version Changes: | Updated the product maturity code to include R, for near-real-time data. There were no changes to the science algorithm in this version. |
V04-Stage2: 2002-06-19 (00:29) to 2010-08-27 (00:37) |
Changes to the science algorithm for this version include:
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V03-Stage2: 2002-06-19 (00:29) to 2010-04-29 (00:38) |
Changes included in this version are:
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Version 1 Processing and Algorithm History
B02: 2005-08-19 (12:44) to 2008-07-06 (00:24) |
This algorithm uses full swath, which includes the addition of units for all parameters and excludes observations that meet any of the following conditions:
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B01: 2002-06-18 (23:40) to 2005-08-19 (12:44) |
Original at-launch version of data. |
Current Version: | Version 2 (V002) |
Maturity Details: | V05-Stage 2 |
Temporal Coverage: | 2010-08-22 (00:18) to 2011-10-2 (00:30) |
Version Changes: | Updated the product maturity code to include R, for near-real-time data. There were no changes to the science algorithm in this version. |
V04-Stage2: 2002-06-19 (00:29) to 2010-08-22 (00:18) |
Changes to the science algorithm for this version include:
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V03-Stage2: 2002-06-19 (00:29) to 2010-04-25 (00:13) |
Changes included in this version are:
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Version 1 Processing and Algorithm History
B02: 2005-08-14 (12:26) to 2008-07-06 (00:24) |
This algorithm uses full swath, which includes the addition of units for all parameters and excludes observations that meet any of the following conditions:
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B01: 2002-06-18 (23:40) to 2005-08-14 (12:26) |
Original at-launch version of data. |
Current Version: | Version 2 (V002) |
Maturity Details: | V05-Stage 2 |
Temporal Coverage: | 2010-08-01 (00:49) to 2011-10-1 (00:36) |
Version Changes: | Updated the product maturity code to include R, for near-real-time data. There were no changes to the science algorithm in this version. |
V04-Stage2: 2002-06-19 (00:29) to 2010-08-01 (00:49) |
Changes to the science algorithm for this version include:
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V03-Stage2: 2002-06-19 (00:29) to 2010-04-01 (00:00) |
Changes included in this version are:
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Version 1 Processing and Algorithm History
B02: 2005-08-23 to 2008-07-06 (00:24) |
This algorithm uses full swath, which includes the addition of units for all parameters and excludes observations that meet any of the following conditions:
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B01: 2002-06-18 to 2005-08-23 |
Original at-launch version of data. |
Current Version: | Version 3 (V003) |
Maturity Details: | V12-Stage 2 |
Temporal Coverage: | 2002-06-01 (00:11) to 2011-10-4 (06:03) |
Version Changes: Implemented: 2015-11-11 |
Version 3 utilizes the GPROF 2010 Version 2 algorithm and Version 3 Level-2A Brightness Temperatures as input. Version 3 now includes both rain and solid precipitation rates and types, as well as ISO lineage metadata. |
V11-Stage 2 2010-10-19 (23:59) to 2011-10-3 (21:49) |
Updated the product maturity code to include R, for near-real-time data. There were no changes to the science algorithm in this version. |
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V10-Stage2: 2002-06-19 (00:29) to 2010-10-20 (00:00) |
Converted the algorithm code to run on Linux. There were no changes to the science algorithm in this version. |
V09-Stage2: 2006-11-13 (02:58) to 2008-07-06 (00:24) |
This validated version of the algorithm includes updated global attributes and inventory metadata to reflect a version change from B08 to V09. There were no changes to the science algorithm from B08 to V09. |
Version 1 Processing and Algorithm History
B08: 2006-03-10 (09:31) to 2006-11-13 (02:58) |
Updates to accommodate the L2A version B07 format changes. |
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B07: 2005-08-23 (04:27) to 2006-03-10 (09:31) |
Update L2A reader for version 5 L2A. |
B06: 2005-06-02 (04:28) to 2005-08-23 (04:27) |
Rain rate is now calculated for surface types of "possible ice over coast." |
B05: 2005-04-01 (04:27) to 2005-07-06 (04:28) |
Improves low coastal rain rates. |
B04: 2004-11-04 (00:46) to 2005-04-01 (04:28) |
Corrects errors resulting from the AMSR-E 89 GHz-A feedhorn failure. The number of pixels per scan changed from 468 to 392. |
B03: 2004-09-24 (14:04) to 2004-11-04 (00:46) |
Corrects low tropical coastal rainfall retrievals and modifies calculations of cold season coastal rainfall estimates to eliminate false rain signatures, which also eliminates most true rainfall signatures for this condition. The algorithm also eliminates rainfall retrievals over ocean when the sun glint is greater than 20 degrees. |
B02: 2002-06-18 (23:40) to 2004-09-24 (14:04) |
First public version of data. The number of pixels per scan changed from 392 to 486 (the full swath width). |
B01 | Original at-launch version of data. |
Current Version: | Version 2 (V002) |
Maturity Details: | V07-Stage 2 |
Temporal Coverage: | 2011-01-01 (00:42) to 2011-10-1 (00:36) |
Version Changes: | Updates to this version resolved a date range issue which halted production beginning in January 2011. |
V06-Stage2: 2002-06-19 (00:29) to 2011-01-01 (00:42) |
Changes included in this version are:
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Version 1 Processing and Algorithm History
B05: 2006-03-01 (00:33) to 2008-07-06 (00:24) |
Updates to accommodate the L2A version B07 format changes. |
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B04: 2005-08-25 to 2006-03-01 (00:33) |
Updates to L2A reader for version B05 L2A. |
B03: 2004-11-01 to 2005-08-25 |
Corrects low tropical coastal rainfall retrievals and modifies calculations of cold season coastal rainfall estimates to eliminate false rain signatures, which also eliminates most true rainfall signatures for this condition. The algorithm also eliminates rainfall retrievals over ocean when the sun glint is greater than 20 degrees. In only AE_RnGd, the B03 algorithm lowers the upper limit for acceptable brightness temperatures over ocean and corrects minor errors in the processing code. |
B02: 2002-06-18 to 2004-11-01 |
First public version of data. Modified the L2B Rain rate product reader so that the full swath width of the L2B product can be used. Updated to prevent any missing data from being counted in the L2B histogram |
B01 | Original at-launch version of data. |
Current Version: | Version 3 (V003) |
Maturity Details: | V15-Stage 1 |
Temporal Coverage: | 2002-06-01 (17:24) to 2011-10-04 (06:51) |
Version Changes: | Changes to the Version 3 algorithm for these data include:
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V14-Stage1: 2010-08-27 (00:36) to 2011-10-03 (21:49) |
A new maturity level was implemented to coincide with updates to other AMSR-E sea ice products. There were no changes to the science algorithm for this product from V13-Stage1 to V14-Stage1. The only change was to the file name. |
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V13-Stage1: 2010-08-27 (00:36) to 2011-10-03 (21:49) |
Changes included in this version are:
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V12-Stage1: 2002-06-19 (00:29) to 2010-08-27 (00:37) |
Corrected an error in the method for applying the multi-year sea ice mask that had caused large areas of Arctic to be erroneously masked in the Snow Depth on Sea Ice parameter. The multi-year sea ice mask and the snow melt mask are now stored within the AMSR-E/Aqua Daily L3 12.5 km Brightness Temperature, Sea Ice Concentration, & Snow Depth Polar Grids (AE_SI12) product. The AE_SI12 product is the only sea ice product with the Snow Depth on Sea Ice parameter, but all AMSR-E sea ice products use the same production code and therefore will be processed with the V12 algorithm. |
V11-Stage1: 2002-06-19 (00:40) to 2010-04-24 (00:13) |
Corrected an error in the snow depth over sea ice retrieval in the Southern Hemisphere. This error, introduced in V10, caused snow depth to be overestimated by a factor of about two. AE_SI12 is the only product with the Snow Depth on Sea Ice parameter, but all AMSR-E sea ice products use the same production code and will be processed with the V11 algorithm. |
V10-Stage1: 2002-06-19 (00:29) to 2009-05-28 (00:41) |
Modified the tie point tables for the Antarctic. |
V09: 2008-09-21 (00:44) to 2009-01-26 (00:03) |
A new sea ice version was implemented to validate sea ice. There were no changes to the science algorithm from T08 to V09.The only change was to the file name. |
T08: 2002-06-19 (00:29) to 2008-09-21 (00:44) |
The AMSR-E sea ice temperature grids were removed from the 25 km product because of inherent ambiguities between changes in the physical temperature of the ice and changes in the ice emissivity. Instead, the panel suggested that an AMSR-E sea ice drift product be developed. Also, this algorithm includes all modifications made in version T07. |
T07 | Data never produced using this algorithm version. Algorithm updates included the following:
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Version 1 Processing and Algorithm History
B06: 2006-03-16 (00:39) to 2008-07-06 (00:24) |
Updates to accommodate the L2A version B07 format changes. |
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B05: 2005-09-05 (00:38) to 2006-03-16 (00:40) |
This algorithm includes:
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B04: 2005-02-25 (00:39) to 2005-09-05 (00:38) |
This algorithm adapts to the B04 L2A format changes. |
B03: 2004-09-24 (00:03) to 2005-02-25 (00:39) |
The following B03 algorithm changes apply only to data derived from the Bootstrap sea ice algorithm:
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B02: 2002-06-18 (23:40) to 2004-09-24 (00:03) |
First public version of data. The following B02 algorithm changes apply only to data derived from the Bootstrap sea ice algorithm:
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B01 | Original at-launch version of data. |
Current Version: | Version 2 (V002) |
Maturity Details: | V10-Stage 1 |
Temporal Coverage: | 2010-08-27 (01:26) to 2011-10-3 (21:49) |
Version Changes: | Updated the product maturity code to include R, for near-real-time data. There were no changes to the science algorithm in this version. |
V09-Stage1: 2002-06-19 (00:29) to 2010-08-27 (00:37) |
Changes included in this version are:
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T08: 2002-06-19 (00:29) to 2008-12-01 (00:02) |
Changes included in this version are:
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Version 1 Processing and Algorithm History
B07: 2006-03-31 (00:46) to 2008-07-06 (00:24) |
Added the scale factor attribute to Snow Water Equivalent arrays. |
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B06: 2006-03-16 (00:39) to 2006-03-31 (00:46) |
Updates to accommodate the L2A version B07 format changes. |
B05: 2006-01-14 (12:20) to 2006-03-16 (00:40) |
This algorithm includes:
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B04: 2005-02-25 (00:39) to 2006-01-14 (12:20) |
This algorithm adapts to the B04 L2A format changes. |
B03: 2004-11-25 (12:15) to 2005-02-25 (00:39) |
This algorithm:
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B02: 2002-06-19 (00:29) to 2004-11-28 (00:46) |
Changes to this algorithm include:
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B01 | Original at-launch version of data. |
AMSR-E/Aqua Daily L3 12.5 km Brightness Temperature, Sea Ice Concentration, & Snow Depth Polar Grids (AE_SI12)
Current Version: | Version 3 (V003) |
Maturity Details: | V15-Stage 1 |
Temporal Coverage: | 2002-06-01 (00:29) to 2011-10-04 (06:51) |
Version Changes: | Changes to the Version 3 algorithm for these data include:
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V14-Stage1: 2010-08-27 (00:36) to 2011-10-03 (21:49) |
Includes an improved land mask for Antarctica, created from a National Ice Center (NIC) landmask shapefile. The NIC shapefile is the newest ice shelf definition, completed by NIC Science Department in June 2011. The shoreline was developed from ENVISAT and RADARSAT imagery from October 2009 until April 2010. Note: This version is currently unavailable. See Reprocessing of AMSR-E Sea Ice Products for details. |
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V13-Stage1: 2010-08-27 (00:36) to 2011-10-03 (21:49) |
Changes included in this version are:
|
V12-Stage1: 2002-06-19 (00:29) to 2010-08-27 (00:37) |
Corrected an error in the method for applying the multi-year sea ice mask that had caused large areas of Arctic to be erroneously masked in the Snow Depth on Sea Ice parameter. The multi-year sea ice mask and the snow melt mask are now stored within the AMSR-E/Aqua Daily L3 12.5 km Brightness Temperature, Sea Ice Concentration, & Snow Depth Polar Grids (AE_SI12) product. The AE_SI12 product is the only sea ice product with the Snow Depth on Sea Ice parameter, but all AMSR-E sea ice products use the same production code and therefore will be processed with the V12 algorithm. |
V11-Stage1: 2002-06-19 (00:40) to 2010-04-24 (00:13) |
Corrected an error in the snow depth over sea ice retrieval in the Southern Hemisphere. This error, introduced in V10, caused snow depth to be overestimated by a factor of about two. AE_SI12 is the only product with the Snow Depth on Sea Ice parameter, but all AMSR-E sea ice products use the same production code and will be processed with the V11 algorithm. |
V10-Stage1: 2002-06-19 (00:29) to 2009-05-28 (00:41) |
Modified the tie point tables for the Antarctic. |
V09: 2008-09-21 (00:44) to 2009-01-26 (00:03) |
A new sea ice version was implemented to validate sea ice. There were no changes to the science algorithm from T08 to V09.The only change was to the file name. |
T08: 2002-06-19 (00:29) to 2008-09-21 (00:44) |
The AMSR-E sea ice temperature grids were removed from the 25 km product because of inherent ambiguities between changes in the physical temperature of the ice and changes in the ice emissivity. Instead, the panel suggested that an AMSR-E sea ice drift product be developed. Also, this algorithm includes all modifications made in version T07. |
T07 | Data never produced using this algorithm version. Algorithm updates included the following:
|
Version 1 Processing and Algorithm History
B06: 2006-03-16 (00:39) to 2008-07-06 (00:24) |
Updates to accommodate the L2A version B07 format changes. |
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B05: 2005-09-05 (00:38) to 2006-03-16 (00:40) |
This algorithm includes:
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B04: 2005-02-25 (00:39) to 2005-09-05 (00:38) |
This algorithm adapts to the B04 L2A format changes. |
B03: 2004-09-24 (00:03) to 2005-02-25 (00:39) |
The following B03 algorithm changes apply only to data derived from the Bootstrap sea ice algorithm:
|
B02: 2002-06-18 (23:40) to 2004-09-24 (00:03) |
First public version of data. The following B02 algorithm changes apply only to data derived from the Bootstrap sea ice algorithm:
|
B01 | Original at-launch version of data. |
Current Version: | Version 3 (V003) |
Maturity Details: | V15-Stage 1 |
Temporal Coverage: | 2002-06-01 (00:29) to 2011-10-04 (06:51) |
Version Changes: | Changes to the Version 3 algorithm for these data include:
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V14-Stage1: 2010-08-27 (00:36) to 2011-10-03 (21:49) |
Includes an improved land mask for Antarctica, created from a National Ice Center (NIC) landmask shapefile. The NIC shapefile is the newest ice shelf definition, completed by NIC Science Department in June 2011. The shoreline was developed from ENVISAT and RADARSAT imagery from October 2009 until April 2010. Note: This version is currently unavailable. See Reprocessing of AMSR-E Sea Ice Products for details. |
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V13-Stage1: 2010-08-27 (00:36) to present |
Changes included in this version are:
|
V12-Stage1: 2002-06-19 (00:29) to 2010-08-27 (00:37) |
Corrected an error in the method for applying the multi-year sea ice mask that had caused large areas of Arctic to be erroneously masked in the Snow Depth on Sea Ice parameter. The multi-year sea ice mask and the snow melt mask are now stored within the AMSR-E/Aqua Daily L3 12.5 km Brightness Temperature, Sea Ice Concentration, & Snow Depth Polar Grids (AE_SI12) product. The AE_SI12 product is the only sea ice product with the Snow Depth on Sea Ice parameter, but all AMSR-E sea ice products use the same production code and therefore will be processed with the V12 algorithm. |
V11-Stage1: 2002-06-19 (00:40) to 2010-04-24 (00:13) |
Corrected an error in the snow depth over sea ice retrieval in the Southern Hemisphere. This error, introduced in V10, caused snow depth to be overestimated by a factor of about two. AE_SI12 is the only product with the Snow Depth on Sea Ice parameter, but all AMSR-E sea ice products use the same production code and will be processed with the V11 algorithm. |
V10-Stage1: 2002-06-19 (00:29) to 2009-05-28 (00:41) |
Modified the tie point tables for the Antarctic. |
V09: 2008-09-21 (00:44) to 2009-01-26 (00:03) |
A new sea ice version was implemented to validate sea ice. There were no changes to the science algorithm from T08 to V09.The only change was to the file name. |
T08: 2002-06-19 (00:29) to 2008-09-21 (00:44) |
The AMSR-E sea ice temperature grids were removed from the 25 km product because of inherent ambiguities between changes in the physical temperature of the ice and changes in the ice emissivity. Instead, the panel suggested that an AMSR-E sea ice drift product be developed. Also, this algorithm includes all modifications made in version T07. |
T07 | Data never produced using this algorithm version. Algorithm updates included the following:
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Version 1 Processing and Algorithm History
B06: 2006-03-16 (00:39) to 2008-07-06 (00:24) |
Updates to accommodate the L2A version B07 format changes. |
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B05: 2005-09-05 (00:38) to 2006-03-16 (00:40) |
This algorithm includes:
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B04: 2005-02-25 (00:39) to 2005-09-05 (00:38) |
This algorithm adapts to the B04 L2A format changes. |
B03: 2004-09-24 (00:03) to 2005-02-25 (00:39) |
The following B03 algorithm changes apply only to data derived from the Bootstrap sea ice algorithm:
|
B02: 2002-06-18 (23:40) to 2004-09-24 (00:03) |
First public version of data. The following B02 algorithm changes apply only to data derived from the Bootstrap sea ice algorithm:
|
B01 | Original at-launch version of data. |
Current Version: | Version 2 (V002) |
Maturity Details: | V10-Stage 1 |
Temporal Coverage: | 2010-08-27 (01:26) to 2011-10-3 (21:49) |
Version Changes: | Updated the product maturity code to include R, for near-real-time data. There were no changes to the science algorithm in this version. |
V09-Stage1: 2002-06-19 (00:29) to 2010-08-27 (00:37) |
Changes included in this version are:
|
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T08: 2002-06-19 (00:29) to 2008-12-01 (00:02) |
Changes included in this version are:
|
Version 1 Processing and Algorithm History
B07: 2006-03-31 (00:46) to 2008-07-06 (00:24) |
Added the scale factor attribute to Snow Water Equivalent arrays. |
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B06: 2006-03-16 (00:39) to 2006-03-31 (00:46) |
Updates to accommodate the L2A version B07 format changes. |
B05: 2006-01-14 (12:20) to 2006-03-16 (00:40) |
This algorithm includes:
|
B04: 2005-02-25 (00:39) to 2006-01-14 (12:20) |
This algorithm adapts to the B04 L2A format changes. |
B03: 2004-11-25 (12:15) to 2005-02-25 (00:39) |
This algorithm:
|
B02: 2002-06-19 (00:29) to 2004-11-28 (00:46) |
Changes to this algorithm include:
|
B01 | Original at-launch version of data. |
Current Version: | Version 2 (V002) |
Maturity Details: | V10-Stage 1 |
Temporal Coverage: | 2010-08-24 (00:55) to 2011-10-3 (00:23) |
Version Changes: | Updated the product maturity code to include R, for near-real-time data. There were no changes to the science algorithm in this version. |
V09-Stage1: 2002-06-19 (00:29) to 2010-08-24 (00:06) |
Changes included in this version are:
|
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T08: 2002-06-19 (00:29) to 2008-11-27 (00:27) |
Changes included in this version are:
|
Version 1 Processing and Algorithm History
B07: 2006-03-27 (00:21) to 2008-07-06 (00:24) |
Added the scale factor attribute to Snow Water Equivalent arrays. |
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B06: 2006-03-12 (00:15) to 2006-03-27 (00:21) |
Updates to accommodate the L2A version B07 format changes. |
B05: 2006-01-11 (12:38) to 2006-03-12 (00:15) |
This algorithm includes:
|
B04: 2005-02-20 (00:20) to 2006-01-11 (12:39) |
This algorithm adapts to the B04 L2A format changes. |
B03: 2004-11-22 (00:33) to 2005-02-20 (00:21) |
This algorithm:
|
B02: 2002-06-20 (00:23) to 2004-11-17 (00:15) |
Changes to this algorithm include:
|
B01 | Original at-launch version of data. |
Current Version: | Version 2 (V002) |
Maturity Details: | V10-Stage 1 |
Temporal Coverage: | 2010-08-01 (00:49) to 2011-10-1 (00:36) |
Version Changes: | Updated the product maturity code to include R, for near-real-time data. There were no changes to the science algorithm in this version. |
V09-Stage1: 2002-06-19 (00:29) to 2010-08-24 (00:06) |
Changes included in this version are:
|
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T08: 2002-06-19 (00:29) to 2008-11-01 (00:38) |
Changes included in this version are:
|
Version 1 Processing and Algorithm History
B07: 2006-03-01 (00:33) to 2008-07-06 (00:24) |
Added the scale factor attribute to Snow Water Equivalent arrays. |
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B06: 2006-03-16 (00:39) to 2006-03-31 (00:46) |
Updates to accommodate the L2A version B07 format changes. |
B05: 2006-01-01 (00:33) to 2006-03-01 |
This algorithm includes:
|
B04: 2005-02-01 to 2006-01-01 |
This algorithm adapts to the B04 L2A format changes. |
B03: 2004-11-01 to 2005-02-01 |
This algorithm:
|
B02: 2002-06-19 to 2004-11-01 |
Changes to this algorithm include:
|
B01 | Original at-launch version of data. |
Current Version: | Version 1 (V001) |
Maturity Details: | B03 |
Temporal Coverage: | 2011-05-30 (00:11) to 2011-10-03 (21:49) |
Version Changes: | Added browse imagery and reprocessed data to span entire AMSR-E mission. |
Note: This version is currently unavailable. See Reprocessing of AMSR-E Sea Ice Products for details. |
B02 | N/A (The B02 algorithm was not publicly released). |
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B01: 2011-06-01 to 2011-10-03 |
Original version of data. |