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GIFTS Blackbody Subsystem Critical Design Review Blackbody Requirements Flowdown

GIFTS Blackbody Subsystem Critical Design Review Blackbody Requirements Flowdown. Fred Best 9 March 2004. Topics. GIFTS Calibration Scheme Flowdown of requirements Blackbody Error Contributions to GIFTS Calibration Overview of Top Level BB Subsystem Specifications.

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GIFTS Blackbody Subsystem Critical Design Review Blackbody Requirements Flowdown

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  1. GIFTSBlackbody SubsystemCritical Design ReviewBlackbody Requirements Flowdown Fred Best 9 March 2004

  2. Topics • GIFTS Calibration Scheme • Flowdown of requirements • Blackbody Error Contributions to GIFTS Calibration • Overview of Top Level BB Subsystem Specifications

  3. GIFTS Radiometric Calibration Concept • Two small reference Blackbodies located behind telescope, combined with Space View. • Blackbody design is scaled from the UW ground-based AERI and NAST / S-HIS aircraft instruments. • Constraints on original S/C prevented traditional external large aperture blackbody configuration. • Advantages compared to large external blackbody: (1) higher emissivity is practical with small size (2) protection from solar forcing.

  4. GIFTS Electro-optical Diagram

  5. A-FOCAL BAFFLE FORE OPTICS BAFFLE FORE OPTICS SECONDARY BAFFLE PMA BAFFLE AFT OPTICS BAFFLE BENCH BLACKBODIES GIFTS Sensor Module Blackbodies Aperture stop image at blackbody aperture

  6. GIFTS Blackbody Absolute Calibration Budget

  7. GIFTS Blackbody Reproducibility Calibration Budget

  8. GIFTS Blackbody Error Sources-LW Longwave Band (800 cm-1) AbsoluteTA=255, TH=290, Ts=240, Tt=280, Tm=250 5 K 0.1 K 0.1 K 0.001 0.001

  9. GIFTS Blackbody Error Sources-LW Longwave Band (800 cm-1) ReproducibilityTA=255, TH=290, Ts=240, Tt=280, Tm=250 5 K 0.014 K 0.014 K 0.0 0.0

  10. GIFTS Blackbody Error Sources-SW Shortwave Band (1800 cm-1) AbsoluteTA=255, TH=290, Ts=240, Tt=280, Tm=250 5 K 0.1 K 0.1 K 0.001 0.001

  11. GIFTS Blackbody Error Sources-SW Shortwave Band (1800 cm-1) ReproducibilityTA=255, TH=290, Ts=240, Tt=280, Tm=250 5 K 0.014 K 0.014 K 0.0 0.0

  12. Summary of Top Level BB Requirements Current Best Estimate Specification* *Derived From GIRD Using Radiometric Model

  13. Summary of Top Level BB Requirements Current Best Estimate Specification* *Imposed by GIFTS Sensor Module Design

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