Post-Launch Calibration and Testing of Space Weather ...Post-Launch Calibration and Testing of Space...
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Post-Launch Calibration and Testing of Space Weather Instruments on GOES-R
Satellite
Sivakumara S.K. Tadikonda, Cynthia S. Merrow, Jeffrey A. Kronenwetter, Gustave J. Comeyne, Daniel G. Flanagan,
Monica TodiritaNASA Goddard Space Flight Center, Greenbelt, MD
SPIE Asia-Pacific Remote SensingEarth Observing Missions and Sensors:
Development, Implementation, and Characterization IV5 April 2016
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Geostationary Operational Environmental Satellite - R
SUVI
EXIS
ABIGLM
Magnetometer
Solar UltraViolet Imager
Geostationary Lightning Mapper
Extreme ultraviolet and X-ray Irradiance Sensor
Advanced Baseline Imager
Not explicitly seen: Space Environment In-Situ Suite SEISS
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Space Weather Instruments: EXIS & SUVI
• X-Ray Sensor
• Extreme UltraViolet Sensor
• Normal Incidence Imaging Telescope
• Guide Telescope Provides Accurate Sun Position
SUVIEXIS
Both Located on Sun-Pointing Platform; Spacecraft Points them to the Sun
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Space Weather Instruments: SEISS
5 Particle Count Measuring Sensors• MPS-Lo, MPS-Hi, SGPS–1, EHIS mounted on the SEISS cabinet• SGPS-2 Mounted to the Spacecraft +X face• Digital Processing Unit mounted inside the Spacecraft bus
MPS-Hi
MPS-LoSGPS
EHIS
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GOES-R Characteristics
Operational Mission• 5 year ground storage, 5 year on-orbit storage, 10 year operational lifetime• Products delivered on a set schedule• Minimal outages
Spacecraft interfaces comply through Station keeping and momentum dumps Eclipses do not effect SEISS Products
Requirements on Cadence, Latency, and Product Performance• Maintaining accuracy requires pre-flight calibration, in-flight calibration tracking, and
careful tracking of uncertainties
Ground Processing Algorithms Dynamic Range:
• Varies on all sensors by many orders of magnitude as a function of wavelength and on all timescales
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Science Performance Verification
Requirements Verification• Plans
• Technical Interchange Meetings
• Approved Documents
End-to-End Calibrations • Interpolation & Extrapolation as needed
Component Calibration + Modeling
• Accuracy, Alignments, Cal Coefficients
Performed Prior to Launch
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End-to-End Ground Calibration
EXIS• Synchrotron Ultraviolet Radiation Facility @ National Institute of Standards Technology,
Gaithersburg, MD• Pre- and Post-Environmental Testing
• …
SEISS• Air Force Research Laboratory @ Kirtland Air Force Base
• Van de Graaff & Cockroft-Walton Accelerators @ NASA Goddard Space Flight Center
• Northeast Proton Therapy Center Cyclotron Facility at Massachusetts General Hospital
• Brookhaven National Laboratory
• National Superconducting Cyclotron Laboratory @ Michigan State University
• …
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Extensive Ground Calibrations
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Component Calibration - SUVI
Primary and Secondary Mirrors • Surface Roughness Measurement
• Reflectance Measurements for Coated Multi-layered Mirror at Lawrence Berkeley National Laboratory
Entrance and Analysis Filters• In-band performance and Out-of-band rejection
CCD• Gain, Quantum Efficiency
Performance Prediction with Synthesized Model
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On-orbit Calibrations / Characterizations: EXIS
• XRS, SPS, and EUVS A/B Darks
• EUVS Filter Characterization
• XRS and EUVS Signal-to-Noise
• Field-of-View Mapping
• XRS and EUVS Signal-to-Noise
• Cruciform Scan Slew
• …
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On-Orbit Calibration Tests Finalized …
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On-orbit Calibrations / Characterizations: SUVI• CCD Dark Current Characterization
• Shutter Light Leakage
• Off-Band Signal Characterization (filter light leaks)
• Flat-Field Calibration (Kuhn-Raster, Boustrophedon)
• Focus Check
• Guide Telescope Calibration
• Cross calibration with EXIS
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… with Inputs from Scientists and Engineers, and …
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On-orbit Calibrations / Characterizations: SEISS In-Flight Calibration
• To determine detector threshold characteristics
EHIS On-Orbit Calibration, Pulse Height Analysis
MPS-Lo Voltage Bias Optimization
Cross Calibration of the +X SGPS and the –X SGPS
SGPS D3-D1 Logic Circuit Test• To determine effectiveness of rear entry particle suppression
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Calibration Sequence of Events Developed
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Rocket image reproduced with Creative Commons license