GOES-R Program Calibration and Validation. Calibration – Processes to transform raw GOES-R instrument data into L1b measurements … the fundamental building blocks for all L2+ products.
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GOES-R Program Calibration and Validation
Robert A. Iacovazzi, Jr.* (1), Edward C. Grigsby (1), Steve Goodman (2), ChangyongCao (3), Jaime Daniels (3), and Kathleen McIntyre (1)
NASA (1), NOAA/NESDIS/GOES-R (2), and NOAA/NESDIS/STAR (3)
[email protected] Address - NASA GSFC, Code 410.0, 8800 Greenbelt Rd, Greenbelt, MD 20771
POST-LAUNCH CALIBRATION/VALIDATION (CAL/VAL)
PRE-LAUNCH INSTRUMENT CALIBRATION and L1B ALGORITHM DEVELOPMENT
Laboratory InstrumentCalibration (Cal)
Key L1b Algorithm Quality Assurance
Post-Launch Testing (PLT) Cal/Val
Instr. Vendor L1b Dev
RFA & RFA Responses
Instrument manufacturers design and perform cal tests, and this table lists cal-related ABI testing carried out by Exelis.
Gov’t Instr Manager
GOES-R observatory on-orbit cal/val assets
L1b Tiger Team Meetings
L1b Alg Reviews and RFA
GOES-13 Hemispheric Image Tiles
Product quality evaluation
Determine and Correct Scan-Angle DependentRadiance (e.g., Beaucomet al., Proceedings of SPIE, 1999)
Gov’t GS Manager
Instrument Noise, Blackbody Temp and Cal Slope Monitoring
GOES-10 Ch. 4A
Before (left) and after (right) Government-Vendor reconciliation of scan mirror reflectance value used in ABI test data analysis.
RFA & RFA Responses
GS Vendor L1b Implem
L1b algorithm implementation process (RFA – Request for Action)
On-board calibration system evaluation
GOES-13 eclipse season stray light before fix (left) and after fix (right)
(Courtesy of J. Paul Douglas, OSPO)
L1b Tiger Team MandateProactively identify and mitigate risks associated with implementing L1b algorithms
Example comparison between GOES-R CWG and Vendor cal test analyses: Ratio of CWG to Exelis cal coefficients for ABI reflective channels.
On-orbit calibration and L1b anomaly resolution