GPM

Content which is affiliated solely with the Global Precipitation Measurement Mission.

Date Last Updated
June 3rd, 2022
Document Description

The L3GPROF algorithm provides monthly and daily mean precipitation and related retrieved parameters from the Level 2 GPROF precipitation profiling algorithm for the GPM core and constellation satellites.


Each L3GPROF product contains global 0.25o x 0.25o gridded monthly/daily unconditional means and pixel counts. Monthly product filenames start with 3A-MO or 3A-CLIM-MO, and daily product filenames start with 3A-DAY or 3A-CLIM-DAY.

Date Last Updated
June 3rd, 2022
Document Description

This Level 3 GPROF Version 07 release involves the following changes from the previous
(Version 05) release:

1. Product format change:
Added dimension variables such as lat, lon, layer, lat_bnds, lon_bnds, layer_bnds. Removed
cloudIce variable but added graupel and latentHeating variables.
2. Total number of precipitation pixels (npixPrecipitation):
In Version 05, pixels with pixelStatus=0 and surfacePrecipitation > 0 are counted as
precipitation pixels. In Version 07, pixels with pixelStatus=0, surfacePrecipitation > 0 and

Upgrade to IMERG Early and Late Runs

The upgrade of GPROF and the Combined Radar-Radiometer Algorithm (CORRA) code to Version 07 as of 0 UTC on May 9, 2022, while IMERG continues at V06 until August, requires the Early and Late Runs to change slightly and be given the version number 06C. Specifically, the V07 GPROF and CORRA data must be used in V06 IMERG, and the GPCP climatological calibration has been recomputed to account for the change in CORRA. In addition, the GMI-other sensor calibrations will shift over the next month as V07 data are incorporated into the accumulation files. We expect the Early and Late time series to be

GPM V07 Update for Radiometer IC, GPROF and Combined

Effective on May 9, 2022, the GPM near real-time (NRT) algorithm will convert to V07. There are substantial format changes in the combined and GPROF products for all radiometers. The 1C product has some additions to the swath information. Depending upon how you read the 1C files, you may or may not have to make changes in your programs. Please click here for the GPM V07 file specification document, where all the format changes and their meaning are described. For those using GPROF and combined products, please read the file specifications. There were no calibration changes in GMI, but SSMIS 1C

GPM Satellite Data Outages During 23-24 March 2022

A mis-set error counter on the Core Observatory provoked a safe hold at 13:31:29 UTC on 23 March 2022, shutting down DPR and GMI observations. DPR and GMI were restored at 10:54 and 14:54 UTC, respectively on 24 March 2022. No data were recoverable from the outage period, although IMERG Early and Late continued to be produced (without GMI input, of course). The same will be true for the Final Run when it is produced. An outage at FNMOC prevented transmission of DMSP (SSMIS) from 15:51 UTC 23 March 23 to 00:47 UTC 24 March 2022. Gaps in the data are: F16: 14:34:07-19:29:39, F17: 14:56:24-19:46

Ensemble-Based Assimilation of Satellite All-Sky Microwave Radiances Improves Intensity and Rainfall Predictions for Hurricane Harvey (2017)

Submitted by LisaN on Wed, 03/23/2022
Publication Year
Authors
Zhang, Y., S. B. Sieron, Y. Lu, X. Chen, R. G. Nystrom, M. Minamide, M.-Y. Chan, C. M. hartman, Z. Yao, J. H. Ruppert Jr., A. Okazaki, S. J. Greybush, E. E. Clothiaux, and F. Zhang
Journal
Geophys. Res. Letts.
Volume
48(24)
Page Numbers
e2021GL096410
DOI
10.1029/2021GL096410
Mission Affiliation
Major Category

6 December 2021 GPM NRT radar product version update to V07

Effective approximately 01:30 UTC on 6 December V06 radar and combined data products will cease to be produced by the NRT. In the period 01:30 - 03:00 NASA and JAXA will be updating the radar products to the officially approved V07A data version. During this period no L2 Ka, Ku or DPR will be available. When radar data resumes it will be V07A which has major changes in swath organization as well as science content. The combined product is an interim product which will use V07A radar inputs but V05 GMI 1C inputs. This product is NOT the final or approved V07A combined product but does have the

PPS Will Commence GPM Version 7 DPR Processing on December 6, 2021

As of November 30, 2021, PPS has ceased production of GPM V06 DPR and Combined products. Starting on December 6, 2021 we will start GPM V07 processing beginning with Data date Dec 1, 2021 for GPM DPR ONLY. On December 10, 2021 we will start GPM (reprocessing) RP for V07 back to the beginning of the mission for GPM DPR ONLY. GPM GMI and Partner data will continue at the current version (V05) until February 2022 (approximately). Please note that the Combined GPM products will not be available again until February 2022. The above does not apply to GPM NRT (near real-time) processing. An