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Accessing the PPS Production Archive using HTTPS and the arthurhouhttps Server

Date Last Updated
January 15th, 2021
Document Description

At the end of 2020, PPS anticipates that it will replace the current FTP access to its Production data archive with FTPS and HTTPS access. In choosing between FTPS and HTTPS, select HTTPS in situations where firewall restrictions prevent FTPS access.

File Downloads
arthurhouhttps_retrieval.pdf

Precipitation Processing System (PPS) Transition from FTP to FTPS for GPM Research / Production Data (arthurhou)

Date Last Updated
January 15th, 2021
Document Description

NASA information security management authorities mandated that continued use of the File Transfer Protocol (FTP) should not be allowed, even when used to provide access to publicly-available, non-sensitive information. This decision was made because FTP login credentials are sent in clear text. For this reason, they mandated that all FTP sites either convert to some form of encrypted login mechanism or be shut down.

File Downloads
arthurhouFTP-FTPS-Transition.pdf

Temporary delay of GPM NRT Data on December 7, 2020

The Precipitation Processing System is planning to migrate the jsimpson.pps.eosdis.nasa.gov (which includes jsimpsonftps.pps.eosdis.nasa.gov) to the CentOS 8 operating system. This update will mean that GPM near real-time (NRT) data will not be available to users during the period of the update. The action is planned for Monday, 7 December 2020. We intend starting at 14 UTC (09:00 EST). We hope the outage will be between 3-5 hours. During this period no GPM NRT will be available. Some data will not be produced at the usual time during this period and will be behind normal latency. No data will

PPS Extended Maintenance and Archive Downtime Sep 22 - Sep 24, 2020 (3 Days)

The PPS (Precipitation Processing System) will be down starting Tuesday September 22, 2020 (0800 EDT|1200 UTC) -through- Thursday September 24, 2020 (Uptime- Still TBD) for a very important multi-day archive upgrade. It is not anticipated that this work will have any impact on the near real-time data servers (jsimpson) or data collection from the GPM satellite and constellation. It is important to be aware that this will be an extensive PPS GPM Archive upgrade that will impact crucial PPS services. Services that may NOT be available during this time include: PPS 'arthurhou' GPM research data

PPS Will be Down for Special Maintenance on Sunday Sep. 13, 2020

The PPS (Precipitation Processing System) will be down Sunday September 13, 2020 from approximately 1:00 PM - 7:00pm EDT (17:00 - 23:00 UTC) for scheduled GPM archive maintenance. It is projected that PPS's GPM research data server (Arthurhou) will offline for 6-8 hours and all data processing, etc. will be halted until maintenance has concluded. Data will continue to be collected from the GPM Core Observatory and constellation satellites, and access to the GPM near real-time data server (Jsimpson) will not be affected. During this time all data transfers between PPS source and its consumer

Resumption of GPM Core Observatory Science Operations and NRT Data

On 26 August 2020 at approximately 14 UTC GMI was commanded into science operations mode. Since that time PPS has been producing level 1 and level 2 GMI data. Everything continues to be nominal with GMI science operations. On 26 August 2020 at approximately 23 UTC the DPR was commanded into science operations mode. Since that time PPS has been receiving 1B data from JAXA and producing L2 products including the combined GMI/DPR product. Everything continues to be nominal with DPR science operations. Users are free to resume retrieving GPM NRT data. Initial investigation indicated that the

Currently Not Receiving Data from the GPM Core Satellite

Effective about 11 UTC 19 August 2020, the GPM Mission Operations Center (MOC) stopped receiving data from the GPM Core Observatory satellite. The Flight Operations Team (FOT) is currently assessing the situation. They are working to determine what configuration needs to be accomplished to reestablish data from the satellite. This will likely take a while and there will be no GPM Core Observatory data products available until communications has been successfully reestablished and tested. The IMERG product will continue to be produced but no GMI data will be included in either the early or late

TKIO Annoucement - PPS is Announcing a New tkio-3.9 Release

PPS has created a new PPS/GPM Science Algorithm Toolkit (TKIO) package which includes all the latest production formats. Those wishing to access new production data products listed below using C and Fortran interfaces may wish to download this TKIO package. Those using development TKIO versions that include the newer products do not need this public distribution, it is optional. This 3.97 TKIO includes all production formats including the recent additions of the V06X radar products and 3B42/3 in HDF5. The direct link is ftp://gpmweb2.pps.eosdis.nasa.gov/pub/PPStoolkit/GPM/tkio-3.97/tkio-3.97

GPROF V05B Release Notes

Date Last Updated
April 17th, 2018
Document Description

GPROF V05 is the rainfall algorithm used in TRMM V8. It matches in all ways the algorithm from the retrieval for GPM GMI and other satellites in the constellation. The Goddard Profiling Algorithm is a Bayesian approach that nominally uses the GPM Combined algorithm to create it's a-priori databases. Given the importance of these databases to the final product, they are worth reviewing before discussing particular changes to the algorithm. GPROF V03 was implemented at the launch of the GPM mission and thus had no databases from the GPM satellite itself.

File Downloads
GPROFV05B_releasenotes.pdf

File Specification for GPM Products

Date Last Updated
August 18th, 2021
Document Description

This document describes the data file formats for all GPM products. Metadata is described in Metadata for GPM Products. The purpose of this file specification document is to define the file content and format for the GPM data products. The file specifications have been reviewed by the algorithm developers. Formats are expected to change for each processing cycle.

Version 7.04 Test TKIO 3.97.18

File Downloads
filespec.GPM_.V7.pdf
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