Level 1C Processing Status: |
The processing status for a Level 1C dataset is indicated by two separate pieces of information to indicate maturity towards an intercalibrated product as defined by general agreement among different approaches, and refinements to the products or file contents for specific sensors within the above broad categories. The maturity of the intercalibrated brightness temperatures for a specific sensor is indicated by a letter designating the reference instrument (i.e. "T" for TMI in the current prototype), followed by a maturity index between 0 and 3 defined as follows:
- 0: Nothing has been done to calibrate the Tb to the reference sensor
- 1: Data has been re-calibrated to match the reference instrument
- 2: The intercalibration has been verified by at least one independent effort
- 3: The intercalibration has been accepted by the Precipitation Science Team (Note: As the calibration reference, TMI is at level 3 by definition)
Modifications to Level 1C files for a specific sensor, say AMSR-E, are indicatedby a Revision number. For example, R1 indicates the initial version of the Level 1C data for a specific sensor. Subsequent revision numbers (i.e. R2, R3 etc.) indicate substantive changes to the data, data format, and/or file contents, which imply reprocessing of the entire data record. Minor revisions to the files, such as might occur with a change to the metadata, are indicated by a lower case letter following the revision number (i.e. 1a, 1b, etc.). Note that the revision numbers are specific to a given sensor so R3 for SSM/I F13 bears no relationship to R1 for AMSR-E. In addition, the reference instrument will have a revision number that corresponds to the version number of the Level 1B product (currently R6 for TMI).
Level 1C Datasets
Bold text indicates currently available datasets!