GOES-R GLM Calibration GLM Science Meeting 2011 Bob Iacovazzi Jr. September 20, 2011 GOES-R Calibration Definition Calibration: The process to determine factors for converting and correcting raw detector measurements into science data units (e.g., radiance) with the specified level of accuracy. [Calibration requirements are found in MRD Sections 184.108.40.206-7] - GOES-R Program Acronym and Glossary 2 R R ole es s po an ns d ib ilit ie s GOES-R Program Cal/Val Documents Technical Details 3 Calibration Support for GLM
Instrument, Spacecraft and Ground Segments Vendors GOES-R Cal/Val Working (CWG) Group Members and Partners Flight Project Ground Segment Project NOAA/NESDIS/STAR MIT Lincoln Laboratory Field Campaign Support (NASA, NOAA, JPL, etc.) Marshall Space Flight Center/UAH 4 Calibration Coordination Team (CCT) Formed Under New PSE Leadership Scope A coordinating body to ensure efficient implementation of calibration activities throughout the GOES-R Program during all mission phases. DOST AWG PSE & Program Science MOST GOES-R Calibration Coordination Team GS Vendor Flight Instr./SC Vendor
GSP GOES-R Calibration Coordination Team membership diagram CCT members - Representatives of any group with responsibility to ensure L1b Product integrity, e.g., PSE & Program Science Flight (Deputy Project Manager, Instrument Managers) Ground (Deputy Project Manager) Other CWG reps Vendors (Instrument, Spacecraft and Ground) MOST (MOM) DOST (DOM) AWG CCT provides a forum to clarify GOES-R cal/val activities and associated member roles and responsibilities PSE lead has the final authority on cal/val topics 5 Major GLM Cal-related Activities in Each Mission Phase Post-Launch Testing (PLT) Pre-Launch Schedule determined by Flight and Vendors Instrument and Test Design and Review Instrument Testing and Test
Verification L1b Algorithm Development, Implementation and Review Schedule determined by MOST and DOST Science Test Design and Review Science Tests Analysis and Verification Cal Parameter Verification Long-Term Monitoring Initialization Performance Analysis/Anomaly Resolution Mission Operational Lifetime Schedule determined by Ops Long-Term Instrument and L1b Product Monitoring Cal Parameter Updates Anomaly Resolution 6 Major GLM Cal-related Activities in Each Mission Phase Post-Launch Testing (PLT) Pre-Launch Schedule determined by Flight and Vendors Instrument and Test Design and Review Instrument Testing and Test Verification L1b Algorithm Development, Implementation and Review Schedule determined by MOST and
DOST Science Test Design and Review Science Tests Analysis and Verification Cal Parameter Verification Long-Term Monitoring Initialization Performance Analysis/Anomaly Resolution Mission Operational Lifetime Schedule determined by Ops Long-Term Instrument and L1b Product Monitoring Cal Parameter Updates Anomaly Resolution 7 Lockheed-Martin Pre-launch Calibration Overview GLM is an imager and an event detector and must be radiometrically calibrated for background scenes (images) and for lightning events (optical pulses) Calibration activities consist of six procedures: Static radiometric response (Linearity and uniformity) Transient radiometric response (instrument calibration) Performance test (detection efficiency, false event rate, etc.) Field of view Spectral response Spacecraft motion and jitter simulation 8 Lockheed-Martin Pre-launch Calibration Overview Calibration is performed in a class 10K clean room at LMATC
Principal equipment includes Large integrating sphere (NIST Certified) Integrating sphere with co-aligned optical pulse emitter Two precision rotary stages Collimator Tunable laser GLM GSD including a dedicated lightning calibration computer system 9 Pre-Launch Design & Development Review Lockheed-Martin RFAs Reports, Presentations Flight / Instrument Vendor Interface CDRLs, Reports Development Plans, Procedures, Reports, Draft CDRLs, RFA Responses, Requested Items Feedback, Comments, Requests, Direction, RFAs Feedback, Comments, RFAs
GLM Instrument Manager CDRLs, Reports GOES-R Portal Reviews, TIMs, and TRRs RFA Responses, Requested Items Feedback, Comments, Requests, RFAs Flight/CWG Review 10 Pre-Launch Calibration Data Management Lockheed-Martin Cal Testing All Instrument Test Data Vendor Archive 2030 expiration Cal Test Data,
Results & Reports Flight / Instrument Vendor Interface Selected Cal Reports & Data for CDRLs GLM Instrument Manager Cal Test Data Requests, Discrepancy Notification GOES-R Portal Cal Test Data, Documentation, Results Cal Test Data Requests, Discrepancy Notification Cal Analysis Cal Test Data, Discrepancy Resolution Cal Test Validation Reports Flight/CWG Verification
Cal/Val Long-term Stewardship 11 L1b Ground Processing Algorithm (GPA) Development and Implementation Lockheed-Martin Lockheed-Martin L1b L1b GPA GPA Development Development Flight / Instrument Vendor Interface Export: L1b GPA (CDRLs), Test IO , Description, and Implementation Certification Import: L1b GPA GS Vendor Implementation Results GOES-R Portal CLASS Ground / Ground Segment Vendor Interface Import: GPA, Test IO, Cal Database, etc. Export: L1b GPA Review Import: L1b GPA, Test Case IO Export: L1b GPA Implementation Results TIMs (GLM Instrument Manager Facilitating)
CWG TIMs (GSP L1b IPT Chair facilitating) Harris Harris L1b L1b GPA GPA Implementation Implementation 12 Major GLM Cal-related Activities in Each Mission Phase Post-Launch Testing (PLT) Pre-Launch Schedule determined by Flight and Vendors Instrument and Test Design and Review Instrument Testing and Test Verification L1b Algorithm Development, Implementation and Review Schedule determined by MOST and DOST Science Test Design and Review Science Tests Analysis and Verification Cal Parameter Verification Long-Term Monitoring Initialization Performance Analysis/Anomaly Resolution Mission Operational Lifetime
Schedule determined by Ops Long-Term Instrument and L1b Product Monitoring Cal Parameter Updates Anomaly Resolution 13 Postlaunch Instrument Calibration Data Flow NOAA Satellite Operations Facility (NSOF) L1b Data, GLM L2+ GRB MM, PG, PD and DE MLS 2-Day Store L1b, L2+ Products, Instr. Cal Data Wallops Command and Data Acquisition System (WCDAS) L1Data, GLM L2+ GRB Fairmount, WV (RBU) Instrument Calibration Data Via Terrestrial Data Link L0 Data Instrument Calibration Data GLM Background Images Calibration-relevant instrument
housekeeping & engineering data Cal L0 and Processing Data GAS Product Generation Operational Environment CWG CLASS Updated Calibration Parameter Tables Instrument Radiometric, Spectral. Spatial Calibration Data Quality Assurance for GOES Series-R Post Launch Verification Long-term Instr. Monitoring Deep-Dive Calibration Analysis and L1b Product Anomaly Resolution Calibration Parameter Updates L1b Calibrated Data Ground Processing Algorithm L0 & Input Data Cal Parameter Tables and Algorithms (Wallops only)
Product Generation Development Environment Experimental L1b Calibrated Data Experimental Ground Processing Algorithm L0 Data L0 & Input Data CLASS 14 L1b Product Performance Monitoring and Anomaly Resolution Instr. Telemetry L1b (GRB) NSOF-SOZ L1b (GRB) WCDAS/RBU-SOZ Mission Mgmt: Instr. Temps, etc. H & S Monitor
Anomaly Resolution Mission Mgmt: GRB Downlink & Monitor SOZ-wide Access to Cal Terminals Mission Mgmt: GRB Uplink Product Generation/ Distribution: Create L0, L0 to L1b processing and GRB generation. 2-day CALVAL Workstation Govt Tools MLS CAL L1b, CAL (RDL) GAS L0 L0
2-day External Org Anomaly Resolution 5-Day RDR DE in WCDAS SOZ Product Generation: Product Performance Monitor Anomaly Resolution CALVAL Workstation Govt Tools MLS SOZ-wide Access to Cal Terminals CLASS Org GOES-R Terminals External Org Workstations Automated Cal Data Acquisition GOES-R Integrated Cal/Val Instrument Performance Web Displays Org LS Org Firewall CLASS 15
Post-Launch Calibration Evaluation Instrument Performance Monitoring Tracking of thermal stability of GLM components Long-term Radiometric Trending Comparison of GOES-E/W GLM background images Ratio of GLM background image radiances with ABI and other instruments GEO-LEO Quick views of GLM background images, output every 2.5 minutes GEO-GEO 16 Post-Launch Calibration Evaluation Long-term Radiometric Trending Several methods have applicability to determining lifetime GLM radiometric calibration drift: Vicarious calibration using
deep convective clouds (DCC), sun glint, and deserts Radiance bias estimate using NWP and radiative transfer models Sonoran Desert and White Sands Site Characterization Sonoran Desert has been used for GOES Imager long-term radiometric trending White Sands is a possible new site for GOES-R Characterization of BRDF to remove seasonal signal variation for vicarious calibration. ht g Fli R TE ted: S 11) MA mple ), / 0 S 2 IRI s Co 2011 10, V e A -2 sition y 23, (Jun R
i E qu (Ma esert c A MR D WS oran n So 17 Summary GLM calibration leveraging diverse complementary technical capabilities Comprehensive GOES-R GLM Cal/Val Strategy and Plan developed to ensure product quality Pre-launch Vendor implementation and Government review processes for GLM calibration testing and data, and ground processing algorithm Post-launch GLM calibration-relevant data capture and monitoring to support anomaly resolution Long-term calibration trending 18
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