Topic: JPSS Algorithm Updates in IDPS Block 2.3 Maintenance Release Mx0 Transition To Operations in the Cloud

Date/Time Issued: November 3, 2020  2205 UTC

Product(s) or Data Impacted:  S-NPP/NOAA-20 xDRs

Date/Time of Initial Impact: December 17, 2020 TBD UTC

Date/Time of Expected End: December 17, 2020 TBD UTC

Length of Outage: TBD

Details/Specifics of Change: 

The next Interface Data Processing Segment (IDPS) Block 2.3 maintenance release Mx0 (IDPS Mx I2.3.00.00) is scheduled to transition to operations in the Cloud on December 17, 2020.  

Algorithm updates for Build 2.3 Mx 0:

1. ATMS TDR/SDR runtime differences in lunar intrusion regions

The lunar intrusion correction was showing slight differences between the ADL and the IDPS.  STAR determined that the root cause of the difference was due to the order of the data packets being processed.  The update ensures that the IDPS and ADL process the data in the same order to get similar results.  


2. VIIRS SDR Geolocation Algorithm Correction

VIIRS optical model applied in generating VIIRS SDR geolocation products will be improved in IDPS Block 2.3 Mx0. Expected geolocation changes (latitude/longitude) are on a sub-pixel level. Users should only see minor differences in data values or metadata. No actions are required by users. 


3. File names will change when put into the Cloud in Block 2.3.


Current filename:



New filename for Cloud operations:



The following table shows the Origin Identifiers for DPN for the Cloud Service Provider (CSP):




IDPS Operational Environment A Instance


IDPS Operational Environment B Instance


IDPS Operational Environment C Instance


IDPS Operational Environment On Demand Instance (On Demand variable * = d-z)


IDPS Test Environment I&T Instance


IDPS Test Environment I&T On Demand Instance (On Demand variable * = a-h, j-z)


Please note: This release will not occur during a Critical Weather Day (CWD).

The contents of this release are subject to change based on user readiness, customer feedback, and management approval. Additional ESPC notifications may provide further details and updates concerning this release.  

Any user feedback and questions should be sent to Shuang Qiu at

Contact Information:  For information on the status of this work please ESPC Operations at or 301-817-3880


Web Site(s) for applicable information: N/A


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