GOES-R Program Calibration and Validation (Cal/Val)
1
GOES-R Program Calibration and Validation (Cal/Val) Robert A. Iacovazzi, Jr.* (1), Edward C. Grigsby (2), Steve Goodman (1), Changyong Cao (3), Jaime Daniels (3), Kathleen McIntyre (2), Joe Zajic (1) NOAA/NESDIS/GOES-R (1), NASA (2), NOAA/NESDIS/STAR (3) *E-mail- [email protected]; Physical Address - NASA GSFC, Code 417.0, Greenbelt, MD 20771 PRE-LAUNCH INSTRUMENT CALIBRATION Spare Visual & IR Imagery Lightning Mapping Space Weather Monitoring Advanced Baseline Imager (ABI) Geostationary Lightning Mapper (GLM) • Space Environment in-Situ Sensor Suite (SEISS) • Magnetometer (MAG) • Solar Ultra- Violet Imager (SUVI) • Extreme UV/X- Ray Irradiance Sensors (EXIS) Earth Pointing Sun Pointing In-Situ GOES-R is the next generation of GOES satellites that will provide a major improvement in quality, quantity, and timeliness of data collected. GOES-R INSTRUMENTS Solar Imaging Instrument Calibration Data PG (L2+ ABI) L1b, L2+ Data GRB Product Monitor and PG Product Performance Monitor & Development Environment (WCDAS Only) Product Distr. & Access (PDA) WAN Link to Wallops Command & Data Acquisition Systems (WCDAS)/Remote Back-Up (RBU) Inst r. Cal Data CLASS Storag e GOES-R L0 Data Pre-launch Data & Data from other satellite assets, field measurements, NWP model output GRB – L1b and L2+ GLM Subject Matter Expert Analysis Mission Manage- ment (MM) Extern al •Near-real-time Performance Monitoring/Visualization •“Deep-dive” Cal Analysis •Updated Cal Tables •Instrument Data Acquisition Request •Cal/Val PLT Reports •L1b Validation Stats and Anomaly Resolution Methods Deep-Dive Tools Operations Managers and Engineers, Vendor Support National Satellite Operations Facility (NSOF) GOES-R Calibration Working Group (CWG) Members CWG Org Network Links CWG Org Net- work Links Ground Segment Externa l Support Agencie s Government Validation of Cal Testing Flight Project and Calibration Working Group • Provide feedback regarding vendor cal test plans and readiness • Analyze vendor cal test reports US National Institute of Standards and Technology (NIST) • Support planning for Système international d'unités (International System of Units - SI) traceable calibrations of ABI and EXIS • Review vendor cal plans and test setups • Establish SI-traceability to primary standards through NIST supported testing, e.g., Validation of ABI filter SRF Characterization of ABI end-to- end spectral response using Traveling SIRCUS Characterization of ABI vendor’s integration spheres at FASCAL2 NIST Synchrotron Ultraviolet Radiation Facility (SURF-III) Facility Integrating Sphere Exit Port O ptical fiber Radiom eter under Test Com puter R eference Radiom eter M onitor Detector (outputto stabilizer) LinearEncoder Tunable Laser W avemeter Integrating Sphere Exit Port Spectrum A nalyser O ptical fiber Radiom eter under Test Com puter R eference Radiom eter Intensity Stabilizer M onitor Detector (outputto stabilizer) C hopper or Shutter Speckle- rem oval System LinearEncoder NIST Spectral Irradiance and Radiance responsivity Calibrations using Uniform Sources (SIRCUS) Vendor Cal Gov’t Instr Manage r Gov’t CWG/Flight Cal Validaton Cal Reports and RFA Responses Porta l Cal Analysi s and RFAs Cal Reports/Analysis and RFA/RFA Responses Instrument Calibration Objectives: • Verify that instrument calibration and product requirements are satisfied • Determine values of semi-static instrument parameters • Ensure pre-launch instrument performance is well understood and documented for possible application to on-orbit anomaly resolution PRE-LAUNCH L1B ALGORITHM DEVELOPMENT POST-LAUNCH CAL/VAL Calibration testing and review process (RFA – Request for Action) Radiometric Characterization & Calibration Spectral Response Image Navigation & Registration Spatial Resolution & Response • System linearity and dynamic range • Signal-to-Noise, NEDN, and Coherent Noise • Pixel-to-pixel, swath-to- swath, channel-to-channel-, image-to-image, and blackbody calibration-to-calibration repeatability • Irradiance to radiance transfer (VNIR) • External/Internal calibration target comparison (TIR) • Polarization (VNIR) • Channel-to-channel and within channel optical cross talk • Electronic cross talk • In-flight electronic calibration • Blooming • Quantization step size • Hot, marginal and dead pixels • Spectral response function (SRF) envelope • SRF uniformity over the focal plane detector array • Out-of-band response • SRF uncertainty • Inference of possible SRF shifts • Consistency between system- level and integrated component-level SRF • Navigation (including star sensing) • Frame-to- frame, within frame, swath-to- swath, and channel-to- channel registration • System modulation transfer function • Spatial response uniformity (e.g., response vs. scan angle) • Ringing from a sharp edge • Near field scatter • Far field scatter • Ghosting • Pointing knowledge ABI vendor instrument calibration testing GOES-R PROGRAM-LEVEL CAL/VAL PLANS, COLLABORATORS, AND ACTIVITIES Instr and L1b Dev Sat and L1b I&T PLT ACT PLT SPOT Ops Instr and Ground Segment Design Review Instr Cal and Cal Test Report Review L1b Dev and Implementation Pre-launch End-to-End Testing and Post-Launch Cal/Val Preparation Cal/Val On-Orbit Checkout Cal Param and L1b Alg Anomaly Res and Updates “Deep-Dive” Cal/Val Analysis Tools Cal Trending Initialization & Long-term monitoring L1b Validation OSPO Responsible STAR/NGDC/ MSFC Support Vendor Support as Requested Mission CDR LAUNCH Observatory Development Flight Oversight CCT/CWG/OSPO Support Instr. Vendor Responsible Flight/MOST Responsible CCT/CWG/OSPO Support Instr. Vendor Support Ground Segment Development GSP Oversight CCT/CWG/OSPO Support GS Vendor Responsible GSP/MOST/DOST Responsible CCT/CWG/OSPO Support GS Vendor Support Long-term Cal/Val Readiness STAR/NGDC/MSFC Responsible PSE CCT/CWG Responsible MOST/DOST Support Scope, Organizations & Working Groups, Roles & Responsibilities, Resources, and Schedules Calibration and Product Validation Strategy Cal/Val Plan Vol. 1: L1b Data Cal/Val Plan Vol 2: L2+ Product Val Major GOES-R Cal/Val-related Activities in Each Mission Phase [Dev – Development; I&T – Integration and Test; PLT ACT – Post-launch Testing (PLT) Activation and Characterization Test; PLT SPOT – PLT System Performance Operational Test; Ops – Operations] L1b Tiger Team Mandate Proactively identify and mitigate risks associated with implementing GFP L1b algorithms L1b Tiger Team Meetings Instr . Vendo r L1b Dev Gov’t Instr Manage r Gov’t CWG/Flig ht L1b Validato n L1b Alg and Test Data and RFA Responses Porta l RFA & RFA Respons es L1b Alg Reviews and RFA Gov’t GS Manage r L1b Alg and Test Data and RFA Responses RFA & RFA Respons es L1b Alg and Test Data and RFA Respons es L1b Alg and Test Data and RFA Responses GOES-R GOES I-P 0 20 40 60 80 100 120 GLM Data ABI Data Space Weather Data Fill Packets Mbps GOES-R DATA THROUGHPUT GOES-R PRODUCTS • Level 1b (L1b) Products (9) • Level 2+ (L2+) Products [from ABI (24) & from GLM (1)] Calibration is applied to GOES-R raw instrument data to transform them into L1b measurements … the fundamental building blocks for all L2+ products. ABI provides 3x spectral, 4x coverage, and 5x temporal resolution of current imager GOES-R Cal/Val Collaborators • Flight Project - Gov’t oversight of SC/Instr. Development • SC/Instr Vendor - SC/Instr. Development • Ground Segment (GS) Project (GSP) - Gov’t oversight of GS Development • GS Vendor - GS Development • Mission Ops Support Team (MOST) - Gov’t SC/Instr/GS Testing • Data Ops Support Team (DOST) - Gov’t GS Testing • Cal Coordination Team (CCT) - Gov’t Cal/L1b Val Management • Cal Working Group (CWG) - Gov’t Cal/L1b Val Technical Support • Algorithm Working Group (AWG) - L2+ Product Dev and V&V • NESDIS Office of Satellite and Product Operations (OSPO) - Ops Support to Cal/Val Validation provides user confidence that GOES-R data can be used for their intended purpose, e.g., weather forecasting or numerical weather prediction. L1b algorithm evolution process (RFA – Request for Action) Key L1b algorithm quality assurance activities • Evaluate L1b algorithm completeness • Identify and track L1b algorithm issues to be resolved by the developer • Assess fidelity of L1b algorithm implementation by the GS vendor • Develop instrument calibration data and product metadata On-Board Cal Devices Vicarious Targets Space- based Inter- Calibrati on ABI •IR Cal (NEDT[@300K]: 0.1K all but 13.3 mm, 0.3K for 13.3 mm) – Blackbody •VNIR Cal (5%) - Solar Diffuser •Self-Emission - Space View •Electronics Linearity - Electronic Stimulus •VNIR Cal - Moon, Stars, Deserts, Test Sites, Deep Convective Clouds (DCCs), Rayliegh Scattering, etc. •MTF, B2B Reg - •VNIR/IR Cal - GEO and LEO Imagers •Spectral Cal – Hyperspect ral Sounders GLM None Response Cal - DCCs, Deserts, Sun-glint Response Cal - GEO and LEO Imagers EXIS •Response Linearity - Light Sources •Dark Measurements and Flatfields - Off-point Mechanism •Electronics Linearity - Electronic Stimulus Response Flatfield - Sun Response Cal – GEO Solar Sensors SUVI •Aliveness - Light Source •Dark Measurements and Flatfields - Off-point Mechanism •Out-of-band Rejection - Glass/Analysis Filters •Electronics Linearity - Response Flatfield - Sun Response Cal - EXIS and other GEO Solar Sensors (e.g., SDO/EVE) SEIS S Electronics Linearity - Electronic Stimulus None Response Cal – GEO Particle Sensors MAG Electronics Linearity - Electronic Stimulus None Response Cal - GEO Mag Sensors GOES-R observatory on-orbit cal/val assets GOES-R cal/val infrastructure Calibration input parameter evaluation GOES-10 Ch. 4A Corrected and uncorrected Radiance vs. scan angle. (Beaucom et al., Proceedings of SPIE, 1999) Radiance [mW/(m^2-sr-cm^- 1)] GS Vendo r L1b Imple m (Wu et al., GSICS Monthly Web Seminar, Dec. 2011, https://gsics.nesdis.noaa.gov/wiki/ Development/20111213) Long-term product monitoring Application of ABI long-term radiometric performance tool to GOES-10 Imager VNIR channel. GOES- 10 ATC WCDAS/ RBU Link via WAN GOES-13 Hemispheric Image Tiles Product quality evaluation Ch. 2 Ch. 3 Ch. 5 Ch. 4 Ch D et A verage G O ES-10 Prelaunch (K ) G O ES-10 O n- O rbit(K ) 2 A 0.1163 0.0933 B 0.1259 0.1007 3 --- 0.1480 0.1324 4 A 0.0725 0.0703 B 0.0771 0.0757 5 A 0.1573 0.1516 B 0.1568 0.1506 On-board calibration system evaluation Instrument Noise, Blackbody Temp and Cal Slope Monitoring On-orbit calibration and L1b anomaly resolution GOES-13 Eclipse Season Stray Light Before Fix (Top) and After Fix (Bottom) (Courtesy of J. Paul Douglas, OSPO) Application of GLM Long-term Radiometric Performance tool to the Tropical Rainfall Measuring Mission Lightning Imaging Sensor (LIS) . Application of ABI Co-Registration Validation tool to the GOES Imager. Cal/Val Methods and Processes
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GOES-R Program Calibration and Validation (Cal/Val). C alibration is applied to GOES-R raw instrument data to transform them into L1b measurements … the fundamental building blocks for all L2+ products. - PowerPoint PPT Presentation
Transcript of GOES-R Program Calibration and Validation (Cal/Val)
GOES-R Program Calibration and Validation (Cal/Val)Robert A. Iacovazzi, Jr.* (1), Edward C. Grigsby (2), Steve Goodman (1), Changyong Cao (3), Jaime Daniels (3), Kathleen McIntyre (2), Joe Zajic (1) NOAA/NESDIS/GOES-R (1), NASA (2), NOAA/NESDIS/STAR (3) *[email protected]; Physical Address - NASA GSFC, Code 417.0, Greenbelt, MD 20771
PRE-LAUNCH INSTRUMENT CALIBRATION
Spare
Visual & IR Imagery Lightning Mapping
Space Weather Monitoring
Advanced Baseline Imager (ABI)
Geostationary Lightning Mapper (GLM)
•Space Environment in-Situ Sensor Suite (SEISS)
•Magnetometer (MAG)
•Solar Ultra-Violet Imager (SUVI)
•Extreme UV/X-Ray Irradiance Sensors (EXIS)
Earth Pointing
Sun PointingIn-Situ
GOES-R is the next generation of GOES satellites that will provide a major improvement in quality, quantity, and timeliness of data collected.
GOES-R INSTRUMENTS
Solar Imaging
Instrument Calibration Data
PG (L2+ ABI)
L1b, L2+ Data
GRB Product Monitor and PG Product Performance Monitor & Development
Environment (WCDAS Only)
Product Distr. & Access (PDA)
WAN Link to Wallops Command & Data
Acquisition Systems (WCDAS)/Remote
Back-Up (RBU)
Instr. Cal
Data
CLASSStorage
GOES-R L0 Data
Pre-launch Data &Data from other
satellite assets, field measurements, NWP
model output
GRB – L1b and L2+ GLM
Subject Matter Expert Analysis
Mission Manage-ment (MM)
External
• Near-real-time Performance Monitoring/Visualization
• “Deep-dive” Cal Analysis• Updated Cal Tables • Instrument Data Acquisition Request• Cal/Val PLT Reports• L1b Validation Stats and Anomaly
Resolution Methods
Deep-Dive Tools
Operations Managers and
Engineers, Vendor Support
National Satellite Operations Facility (NSOF)
GOES-R Calibration Working Group (CWG) Members
CWG Org
Network Links
CWG Org Net- work Links
Ground Segment
External Support Agencies
Government Validation of Cal Testing
Flight Project and Calibration Working Group• Provide feedback regarding vendor cal test
plans and readiness• Analyze vendor cal test reportsUS National Institute of Standards and Technology (NIST)• Support planning for Système international
d'unités (International System of Units - SI) traceable calibrations of ABI and EXIS
• Review vendor cal plans and test setups• Establish SI-traceability to primary standards
through NIST supported testing, e.g., Validation of ABI filter SRF Characterization of ABI end-to-end spectral
response using Traveling SIRCUS Characterization of ABI vendor’s integration
spheres at FASCAL2 Characterization of external blackbody via
thermal transfer radiometer (TXR) Validation of the ABI vendor’s FEL lamps End-to-end calibrations of EXIS at SURF-
III/Beamline 2
NIST Synchrotron Ultraviolet Radiation Facility (SURF-III) Facility
Tunable Laser
Wavemeter
IntegratingSphere
Exit Port
Spectrum Analyser
Optical fiber
Radiometerunder Test
Computer
ReferenceRadiometer
IntensityStabilizer
Monitor Detector (output to stabilizer)
Chopperor
Shutter
Speckle-removalSystem
Lin
ear
Enc
oder
Tunable LaserTunable Laser
Wavemeter
IntegratingSphere
Exit Port
Spectrum Analyser
Optical fiber
Radiometerunder Test
Computer
ReferenceRadiometer
IntensityStabilizer
Monitor Detector (output to stabilizer)
Chopperor
Shutter
Speckle-removalSystem
Lin
ear
Enc
oder
NIST Spectral Irradiance and Radiance responsivity Calibrations
using Uniform Sources (SIRCUS)
Vendor Cal
Gov’t Instr
Manager
Gov’t CWG/Flight Cal Validaton
Cal Reports and RFA
Responses
Portal
Cal Analysis and RFAs
Cal Reports/Analysis and RFA/RFA Responses
Instrument Calibration Objectives:• Verify that instrument calibration
and product requirements are satisfied
• Determine values of semi-static instrument parameters
• Ensure pre-launch instrument performance is well understood and documented for possible application to on-orbit anomaly resolution
PRE-LAUNCH L1B ALGORITHM DEVELOPMENT
POST-LAUNCH CAL/VAL
Calibration testing and review process (RFA –
Request for Action)
Radiometric Characterization & Calibration
Spectral Response Image Navigation & Registration
Spatial Resolution &
Response• System linearity and dynamic range• Signal-to-Noise, NEDN, and Coherent
Noise• Pixel-to-pixel, swath-to-swath,
channel-to-channel-, image-to-image, and blackbody calibration-to-calibration repeatability
• Irradiance to radiance transfer (VNIR)• External/Internal calibration target
comparison (TIR)• Polarization (VNIR)• Channel-to-channel and within
channel optical cross talk• Electronic cross talk• In-flight electronic calibration• Blooming• Quantization step size• Hot, marginal and dead pixels
• Spectral response function (SRF) envelope
• SRF uniformity over the focal plane detector array
• Out-of-band response
• SRF uncertainty
• Inference of possible SRF shifts
• Consistency between system-level and integrated component-level SRF
• Navigation (including star sensing)
• Frame-to-frame, within frame, swath-to-swath, and channel-to-channel registration
• System modulation transfer function
• Spatial response uniformity (e.g., response vs. scan angle)
• Ringing from a sharp edge
• Near field scatter
• Far field scatter
• Ghosting
• Pointing knowledge
ABI vendor instrument calibration testing
GOES-R PROGRAM-LEVEL CAL/VAL PLANS, COLLABORATORS, AND ACTIVITIES
Instr and L1b Dev
Sat and L1b I&T
PLT ACT
PLT SPOT
Ops
Instr and Ground Segment Design Review
Instr Cal and Cal Test Report Review
L1b Dev and Implementation
Pre-launch End-to-End Testing and Post-Launch Cal/Val Preparation
Cal/Val On-Orbit Checkout
Cal Param and L1b Alg Anomaly Res and Updates
“Deep-Dive” Cal/Val Analysis Tools
Cal Trending Initialization & Long-term monitoring
L1b Validation
OSPO ResponsibleSTAR/NGDC/ MSFC SupportVendor Support as Requested
Mis
sion
CD
R
LAU
NCH
Observatory Development
Flight OversightCCT/CWG/OSPO SupportInstr. Vendor Responsible
Flight/MOST ResponsibleCCT/CWG/OSPO SupportInstr. Vendor Support
Ground Segment Development
GSP OversightCCT/CWG/OSPO SupportGS Vendor Responsible
GSP/MOST/DOST ResponsibleCCT/CWG/OSPO SupportGS Vendor Support
Long-term Cal/Val Readiness
STAR/NGDC/MSFC Responsible
PSE CCT/CWG ResponsibleMOST/DOST Support
Scope, Organizations & Working
Groups, Roles & Responsibilities,
Resources, and Schedules
Calibration and Product Validation Strategy
Cal/Val Plan Vol. 1: L1b Data
Cal/Val Plan Vol 2: L2+ Product Val
Major GOES-R Cal/Val-related Activities in Each Mission Phase
[Dev – Development; I&T – Integration and Test; PLT ACT – Post-launch Testing (PLT) Activation and Characterization Test; PLT SPOT – PLT System Performance Operational Test; Ops – Operations]
L1b Tiger Team Mandate Proactively identify and mitigate risks associated with
implementing GFP L1b algorithms
L1b Tiger Team Meetings
Instr. Vendor
L1b Dev
Gov’t Instr
Manager
Gov’t CWG/Flight
L1b Validaton
L1b Alg and Test Data and
RFA Responses
Portal
RFA & RFA Responses
L1b Alg Reviews and RFA
Gov’t GS ManagerL1b Alg and
Test Data and RFA
Responses
RFA & RFA Responses
L1b Alg and Test
Data and RFA
Responses
L1b Alg and Test Data and RFA Responses
GOES-R GOES I-P0
20
40
60
80
100
120
GLM Data
ABI Data
Space Weather Data
Fill Packets
Mb
ps
GOES-R DATA THROUGHPUT
GOES-R PRODUCTS• Level 1b (L1b) Products (9) • Level 2+ (L2+) Products [from ABI (24)
& from GLM (1)]
Calibration is applied to GOES-R raw instrument data to transform them into L1b measurements … the fundamental building blocks for all L2+ products.
ABI provides 3x spectral, 4x coverage, and 5x temporal resolution of current imager
GOES-R Cal/Val Collaborators• Flight Project - Gov’t oversight of SC/Instr. Development• SC/Instr Vendor - SC/Instr. Development• Ground Segment (GS) Project (GSP) - Gov’t oversight of GS Development• GS Vendor - GS Development• Mission Ops Support Team (MOST) - Gov’t SC/Instr/GS Testing• Data Ops Support Team (DOST) - Gov’t GS Testing• Cal Coordination Team (CCT) - Gov’t Cal/L1b Val Management• Cal Working Group (CWG) - Gov’t Cal/L1b Val Technical Support• Algorithm Working Group (AWG) - L2+ Product Dev and V&V• NESDIS Office of Satellite and Product Operations (OSPO) - Ops Support
to Cal/Val
Validation provides user confidence that GOES-R data can be used for their intended purpose, e.g., weather forecasting or numerical weather prediction.
L1b algorithm evolution process (RFA – Request for Action)
Key L1b algorithm quality assurance activities• Evaluate L1b algorithm
completeness• Identify and track L1b algorithm
issues to be resolved by the developer
• Assess fidelity of L1b algorithm implementation by the GS vendor
• Develop instrument calibration data and product metadata definitions
On-Board Cal Devices Vicarious Targets
Space-based Inter-Calibration
ABI
• IR Cal (NEDT[@300K]: 0.1K all but 13.3 mm, 0.3K for 13.3 mm) – Blackbody
• VNIR Cal (5%) - Solar Diffuser
• Self-Emission - Space View
• Electronics Linearity - Electronic Stimulus
• VNIR Cal - Moon, Stars, Deserts, Test Sites, Deep Convective Clouds (DCCs), Rayliegh Scattering, etc.
• MTF, B2B Reg - Moon
• VNIR/IR Cal - GEO and LEO Imagers
• Spectral Cal – Hyperspectral Sounders
GLMNone Response Cal -
DCCs, Deserts, Sun-glint
Response Cal - GEO and LEO Imagers
EXIS
• Response Linearity - Light Sources
• Dark Measurements and Flatfields - Off-point Mechanism
• Electronics Linearity - Electronic Stimulus
Response Flatfield - Sun
Response Cal – GEO Solar Sensors
SUVI
• Aliveness - Light Source• Dark Measurements and
Flatfields - Off-point Mechanism
• Out-of-band Rejection - Glass/Analysis Filters
• Electronics Linearity - Electronic Stimulus
Response Flatfield - Sun
Response Cal - EXIS and other GEO Solar Sensors (e.g., SDO/EVE)
SEISS
Electronics Linearity - Electronic Stimulus
None Response Cal – GEO Particle Sensors
MAGElectronics Linearity - Electronic Stimulus
None Response Cal - GEO Mag Sensors
GOES-R observatory on-orbit cal/val assets GOES-R cal/val infrastructure
Calibration input parameter evaluation
GOES-10 Ch. 4A Corrected and uncorrected Radiance vs. scan angle. (Beaucom et al., Proceedings of SPIE, 1999)
Radi
ance
[mW
/(m
^2-s
r-cm
^-1)
]
GS Vendor
L1b Implem
(Wu et al., GSICS Monthly Web Seminar, Dec. 2011, https://gsics.nesdis.noaa.gov/wiki/ Development/20111213)
Long-term product monitoring
Application of ABI long-term radiometric performance tool to GOES-10 Imager VNIR channel.
GOES-10
ATC
WCDAS/RBU
Link via WAN
GOES-13 Hemispheric Image Tiles
Product quality evaluation
Ch. 2 Ch. 3
Ch. 5Ch. 4
Ch Det Average GOES-10 Prelaunch (K)
GOES-10 On-Orbit (K)
GOES-9 On-Orbit (K)
2 A 0.1163 0.0933 0.1065 B 0.1259 0.1007 0.1090
3 --- 0.1480 0.1324 0.1231 4 A 0.0725 0.0703 0.0710
B 0.0771 0.0757 0.0705 5 A 0.1573 0.1516 0.1725
B 0.1568 0.1506 0.1825
On-board calibration system evaluation
Instrument Noise, Blackbody Temp and Cal Slope Monitoring
On-orbit calibration and L1b anomaly resolution
GOES-13 Eclipse Season Stray Light Before Fix (Top) and After Fix (Bottom) (Courtesy of J. Paul Douglas, OSPO)
Application of GLM Long-term Radiometric Performance tool to the Tropical Rainfall Measuring Mission Lightning Imaging Sensor (LIS) .
Application of ABI Co-Registration Validation tool to the GOES Imager.
Cal/Val Methods and Processes
