NOAA-20 and Suomi NPP ATMS On-orbit Performance

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Presentation transcript:

NOAA-20 and Suomi NPP ATMS On-orbit Performance Ninghai Sun1, Quanhua (Mark) Liu2, Hu Yang3 1. ERT, Inc @NOAA/STAR, College Park, Maryland 2. NOAA/NESDIS/Center for Satellite Applications and Research, College Park, Maryland 3. University of Maryland, College Park, Maryland With contribution from NOAA/STAR, NASA/GSFC, MIT/LL, UMD/CICS, CSU/CIRA, Northrop Grumman, Raytheon March 22, 2018

Outline Suomi NPP ATMS Current Status NOAA-20 ATMS Performance Summary NOAA-20 ATMS Instrument Evaluations Channel noise (NEΔT) Channel correlation Striping noise Geolocation accuracy Reflector emissivity Bias characterization Suomi NPP SDR Reprocessing Status Summary

S-NPP ATMS Status S-NPP ATMS instrument is stable ATMS instrument performance is better than the requirement ATMS operational calibration algorithm has been updated from Rayleigh-Jean’s approximation based to Full Radiance based since March 08, 2017 Scan drive main motor current had been dropped down to a “normal” level after orbital scan reversal implementation S-NPP ATMS near real time on-orbit status can be checked in NOAA integrated calibration/validation system (ICVS) at https://www.star.nesdis.noaa.gov/icvs/status_NPP_ATMS.php

S-NPP ATMS Status Requirement (red line) Performance (black line)

S-NPP ATMS Status

S-NPP ATMS Scan Drive Motor Current S-NPP ATMS scan drive main motor experienced abnormal (high) current from 2014 Summer. Mitigation used: Once per day scan reversal from August 2015 Once per orbit scan reversal from July 2016 Twice per orbit reversal from August 2016 Scan drive main motor current has been dropped down to a “normal” level since April 3, 2017.

S-NPP ATMS Scan Drive Motor Current

NOAA-20 ATMS Instrument Requirement Ch Center Freq.(MHz) Pol Bandwidth Max. (MHz) Calibration Accuracy (K) NEΔT (K) @300K 3-dB Beamwidth (deg) Applications 1 23800 QV 270 1.0 0.7 5.2 Water vapor, cloud, surface 2 31400 180 0.8 3 50300 QH 0.75 0.9 2.2 Surface, temperature 4 51760 400 Atmospheric temperature 5 52800 6 53596±115 170 7 54400 8 54940 9 55500 330 10 57290.344(fo) 11 fo± 217 78 1.2 12 fo±322.2±48 36 13 fo±322.2±22 16 1.5 14 fo±322.2±10 2.4 15 fo±322.2±4.5 3.6 88200 2000 0.5 Surface, cloud 17 165500 3000 0.6 1.1 Cloud 18 183310±7000 Water vapor 19 183310±4500 20 183310±3000 1000 21 183310±1800 22 183310±1000 500

NOAA-20 ATMS First Global Image https://www.star.nesdis.noaa.gov/icvs-beta/status_J01_ATMS.php

NOAA-20 ATMS TDR/SDR

NOAA-20 ATMS Performance Summary In comparison with S-NPP ATMS, NOAA-20 ATMS has demonstrated a better performance on, Lower channel noise (i.e. NEΔT) Smaller channel correlation (better independent information) Less striping noise Improved geolocation accuracy Lower reflector emissivity

NOAA-20 ATMS On-Orbit NEΔT Status NOAA-20 ATMS has a slightly better noise than S-NPP

NOAA-20 ATMS Channel Correlation NOAA-20 ATMS has much better noise correlation than S-NPP

NOAA-20 ATMS Striping Assessment Experimental result

NOAA-20 ATMS Geolocation Evaluation S-NPP Geolocation Accuracy Analysis Results NOAA-20 Geolocation Accuracy Analysis Results Dataset obtained from 2017-11-29 to 2018-01-27 24 costal regions picked for passive geolocation accuracy analysis

NOAA-20 ATMS Geolocation Evaluation S-NPP NOAA-20

NOAA-20 ATMS Reflector Emissivity NOAA-20 ATMS reflector has much lower emissivity than S-NPP

NOAA-20 ATMS Bias Characterization

NOAA-20 ATMS Bias Characterization

Suomi NPP Reprocessing SDR Status Sensor Data Name Period Data Volume (/year) SW Version ATMS TDR/SDR/GEO 2011-11-08 to 2017-03-08 (completed) 450 GB ADL 4.2_MX811 CrIS SDR/GEO 2012-02-20 to 2017-03-08 (completed) 16 TB ADL 5.3.1 FSR SDR 2014-12-04 to 2017-03-08 (completed) 28.5 TB VIIRS I-Band SDR/Terrain Corrected GEO M-Band SDR/Terrain Corrected GEO DNB SDR/GEO 2012-01-02 to 2016-07-31 (completed) 2016-08-01 to 2017-03-08 (ongoing) 150 TB ADL 4.2_MX8.11 OMPS NP SDR/GEO 2012-01-25 to 2015-09-30 (completed) 2015-10-01 to 2017-03-08 (ongoing) 86 GB ADL5.3.1 TC SDR/GEO 2012-01-26 to 2015-09-09 (completed) 2015-09-10 to 2017-03-08 (will be processed after CrIS is done) 1 TB

Suomi NPP Reprocessing SDR Status http://jlrdata.umd.edu/opendap/thredds

S-NPP Reprocessing SDR Status

Summary Suomi NPP ATMS is still running stable and providing high quality data products for applications NOAA-20 ATMS shows an improved performance compared to S-NPP ATMS based on the analysis of data from activation on November 29, 2017 NOAA-20 ATMS data product quality has met the provisional maturity requirement and ready for broader user community assessment Suomi NPP reprocessing SDR data are available for reanalysis