LRO System Requirements Review Diviner Lunar Radiometer Experiment Requirements

1. LRO System Requirements ReviewDiviner Lunar Radiometer ExperimentRequirements Marc C. Foote Lunar Diviner System Engineer Jet Propulsion Laboratory

2. DLRE Organization Chart

3. Science Overview / Theory of Operation Measurement Goals: • Map Global Day/Night Surface Temperatures • Map Global Solar Illumination • Characterize Thermal Environments for Habitability • Determine Rock Abundances at Landing Sites • Identify Potential Polar Ice Reservoirs • Map Silicate Mineralogy to Locate Ilmenite – Easily Broken Down into Titanium, Iron, and Oxygen Measurement Approach: • Minor changes from heritage Mars Climate Sounder instrument (MRO) • 9-channel radiometric pushbroom mapper (0.3 to 200 micron wavelength range) • 300m spatial resolution • Internal blackbody and solar calibration targets

4. Heritage

5. Instrument Documents • LRO Requirements Document; ESMD-RLEP-0010 • LRO Mission Requirements Document; 431-RQMT-00004 • LRO Technical Resource Allocations; 431-RQMT-000112 • Instrument Payload Assurance Implementation Plan • DLRE Mechanical Interface Control Document 431-ICD-000086 • DLRE Electrical Interface Control Document 431-ICD-000095 • DLRE Data Interface Control Document 431-ICD-000105 • DLRE Thermal Interface Control Document 431-ICD-000116 • Instrument Requirements Documents • Diviner Lunar Radiometer Experiment (DLRE) Instrument Performance Requirements Document (IPR) JPL-D-32399 • Diviner Lunar Radiometer Experiment (DLRE) Data Product Specification Document (DPS) JPL-D-32400 • Diviner Lunar Radiometer Experiment (DLRE) Functional Requirements Document (FRD) JPL-D-32375

6. Mission Level RequirementsESMD-RLEP-0010

7. Instrument System Level Requirements (1)

8. Instrument System Level Requirements (2)

9. Instrument System Level Requirements (3)

10. Instrument System Level Requirements (4)

11. Instrument Subsystem Level Requirements (1)

12. Instrument Subsystem Level Requirements (2)

13. Instrument Subsystem Level Requirements (3)

14. Instrument Subsystem Level Requirements (4)

15. Data Product Traceability

16. DLRE Constraints on LRO

17. Instrument Schematic Diagram

18. Optical System Layout

19. Electronics Block Diagram

20. Development Flow Electronics / Yoke Assembly FPA / Filters Assemble & Align Optics Bench / Electronics Assembly Telescopes / Optics Bench Install & Align Azimuth Drive / Yoke Assembly Elevation Drive / Yoke Assembly Telescopes / Optics Assemble & Align Radiometer / Yoke Assembly Functional Testing

21. Instrument Verification Test plans, procedures and results are archived in the JPL Project Data Management System or DLRE Docushare Library. Hardcopies of as-run test procedures and test results will be contained in the end-item data package. All documentation is controlled per the DLRE Configuration Management Plan.

22. Instrument Current Status • Major mechanical, optical, and electronic systems are build-to-print • Solar and thermal spectral pass bands selected • Architecture for external interface box complete • Mineralogy spectral pass band optimization study under way • Study underway to select optimal modifications to mitigate warmer thermal environment (thicker blankets verses higher reflectivity on outer blankets verses high reflectivity shield)

23. Schedule

24. Summary • Diviner is a heritage instrument – it differs from Mars Climate Sounder in: • Spectral bands (different filters) • Shorter integration time • Different interface to spacecraft • Warmer thermal environment • Diviner requirements are well understood and documented in: • DLRE Instrument Performance Requirements Document • DLRE Data Product Specification Document • DLRE Function Requirements Document • DLRE constraints LRO have been flowed down and are documented in the LRO MRD • Design status: • Contract for filter design and fabrication in negotiation • Design for hardware/software interface to spacecraft underway • Trade study underway to reduce thermal load in lunar environment