Update #4: This is a reminder of the IDPS Block 2.3 maintenance release Mx0 (IDPS Mx I2.3.00.00) scheduled for February 4, 2021. The release now has a scheduled start time of 1615 UTC. Downstream users might experience a few duplicate files for observed data close to the transition time, but will receive all data as requested.

Update #3: IDPS Block 2.3 maintenance release Mx0 (IDPS Mx I2.3.00.00) has been rescheduled to February 4, 2021 at 1500 UTC.

Update #2: IDPS Block 2.3 maintenance release Mx0 (IDPS Mx I2.3.00.00) has been rescheduled to January 28, 2021 at 1500 UTC.

Update #1: IDPS Block 2.3 maintenance release Mx0 (IDPS Mx I2.3.00.00) previously scheduled to transition to operations on December 17, 2020 has been rescheduled to occur on January 21, 2021.

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

Date/Time Issued: February 1, 2021 1730 UTC

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

Date/Time of Initial Impact: February 4, 2021 1615 UTC

Date/Time of Expected End: February 4, 2021 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 February 4, 2021 at 1615 UTC.

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:

VM01O_j01_d20200507_t1241149_b12785_c2020050713054604753_noac_ops.h5

New filename for Cloud operations:

VM01O_j01_d20200507_t1241149_b12785_c2020050713054604753_oeac_ops.h5

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

Identifier	Description
oea-	IDPS Operational Environment A Instance
oeb-	IDPS Operational Environment B Instance
oec-	IDPS Operational Environment C Instance
oe*-	IDPS Operational Environment On Demand Instance (On Demand variable * = d-z)
tei-	IDPS Test Environment I&T Instance
te*-	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 shuang.qiu@noaa.gov

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

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

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