Mission Updates

GPM IMERG V06A is being retracted for correction

An error has been discovered in processing the initial batches of V06 IMERG Final Run months.  A design choice in the code ended up retaining microwave precipitation estimates in the latitude band 60°N-S when there is snow/ice on the surface, rather than masking out the estimates due to low performance in such cases.  [Masking for microwave retrievals over surface snow and ice outside that band is correct.]

All V06A Monthly and Half-hourly IMERG products are being retracted, as shown in this table (Encompassing all IMERG V06A data that had been reprocessed and archived -to date):

----------+----------------+---------------------+---------------------+------------+---------+--------------+ 

| DataType | ProductVersion | Start of Data       | End of Data # 
| Granules | # Empty | Total Size   |
+----------+----------------+---------------------+---------------------+------------+---------+--------------+ 

| 3IMERGHH | V06A           | 2014-06-01 00:00:00 | 2015-12-31 23:59:59
|      27792 |       0 |     273.23 G |
| 3IMERGM  | V06A           | 2014-06-01 00:00:00 | 2015-12-31 23:59:59
|         19 |       0 |       0.93 G |
+----------+----------------+---------------------+---------------------+------------+---------+--------------+ 


Replacements are anticipated to be released the week of March 25, and will continue to be named V06A since the retracted files are considered faulty.

If you have previously obtained any of the data listed above, please discard these and replace this data with the new data once this is available the week of March 25 or later.

We apologize for any confusion or inconvenience that this may have caused and appreciate your continued patience.