Landsat 9 Project Status Update
Landsat 9 project status update highlights successful milestones including the upcoming launch on September 16, 2021, instrument performance, and observatory testing. The project team has maintained progress despite challenges, and all active project risks are green. The observatory environmental campaign was extremely successful, and key instruments like OLI-2 and TIRS-2 are meeting or exceeding science requirements.
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Presentation Transcript
Glacier Bay National Park Landsat 8 / OLI 9/17/2019 Landsat 9 Space Segment Status Landsat 9 Space Segment Status Jeff Masek, NASA GSFC Jeff Masek, NASA GSFC NASA Landsat 9 Project Scientist NASA Landsat 9 Project Scientist July 22, 2021 July 22, 2021
Landsat 9 Project Status Project is on track for September 16, 2021 launch Successful Pre-Ship Review (PSR) June 17-21, 2021 Successful Flight Operations Review/Operations Readiness Review (FOR/ORR) June 21-22 Observatory successfully transported to VSFB July 7, and being prepared for launch Project team did an outstanding job maintaining progress during pandemic Mission has held schedule extremely well since PER last October No open issues; all active and residual project risks are green Mission readiness testing has completed all testing requiring the observatory Mission on course to satisfy all level 1 baseline mission requirements
Landsat 9 Project Status Observatory Extremely successful observatory environmental campaign Observatory performance is excellent Solar Array Drive Assembly (SADA) serial number (SN) 6 successfully installed on the observatory and completed functional testing in May 2021 Post-thermal vacuum Observatory comprehensive performance test (CPT) successfully completed
Instrument Status: OLI-2 OLI-2 performance meets Level 1 Science Requirements OLI-2 radiometric and geometric performance equals or surpasses Landsat 8 OLI performance Signal-to-Noise Ratio (SNR) of transmitted OLI-2 data will be improved by up to 25% at typical radiances due to retention of full 14 bits of data Spectral response and instrument non-linearity has been significantly better characterized on OLI-2 resulting in reduced radiometric uncertainty One detector in the Cirrus band was identified as inoperable during Observatory TVAC. Redundant, operable detector will be used instead via Detector Select Map revision provided by Ball No science impact
Instrument Status: TIRS-2 TIRS-2 performance meets Level 1 Science Requirements TIRS-2 radiometric and geometric performance has significantly improved when compared to Landsat 8 TIRS Stray light has been reduced by ~10x, and overall radiometric accuracy within specification Spatial and spectral response has been significantly better characterized and understood for TIRS-2 Modeled stray light performance (based on pre-launch measurements) of TIRS-2 stray light vs. Landsat 8 TIRS stray light, for the three TIRS Sensor Chip Assemblies
Observatory Launch Site Progress Landsat 9 Observatory caravan departed NGSP, Gilbert, AZ at 3 AM, July 6, 2021 Arrived at L3Harris IPF at 8 AM, July 7 Post-ship activities proceeding as planned Observatory successfully completed its 4-day post-ship LPT Observatory proceeding to propulsion functional testing To be followed by fueling, final closeouts, and encapsulation Observatory is on track for launch Landsat 9 Observatory at L3Harris facility, VSFB
Landsat 9 ESPA Flight System L9 EFS is a separate project from L9, sponsored by the USSF, to demonstrate deployment of small satellites as secondary payloads. Do No Harm (DNH) requirement verifications ensure Landsat 9 is not impacted as well as having key discipline leads on L9 and L9 EFS ensuring L9 mission requirements will be met. L9 EFS added mass simulators to ports that didn t meet requirements to ensure no impact is realized. Landsat 9 is not impacted by L9 EFS mechanically, thermally, electrically, contamination, or safety wise.
Path to Launch ~30-minute launch window each day starting 10:11am PST/ 11:11 PDT ~10-12-day window before ULA team required back at KSC
Post-Launch Timeline Phase MET Days Key Activities Notes Initial acquisition Configure Keys Configure Fault Management Configure TIM Transition to Mission mode 1 PIE, SSR, SADA, GPS and X-Band Init and checkout Mode Transitions: Sun Acq ENG_Earth MSN_OBS Operations performed via RT command Exercised in multiple sims with contingencies (through L+36 hours) SC Initial Activation Operations performed via RT command and CATS/MATS Checkout priorities are achieving readiness for maneuver execution (COLA) and verifying SC modes to support science operations Prop System Init & Checkout ACS Calibrations and Mode Checkouts Engineering Burns Comm & Site Checkouts EPS Trending/Adjustment Ascent burns 1 & 2 SC Checkout 2 30 Operations via RT Command and ATS Timing of activities contingent upon on-orbit thermal behavior Prepares instruments for earth imaging OLI Power On & Checkout OLI Dryout OLI Cooldown OLI Image Characterization Initial Lunar Cal Opp TIRS Power On & Checkout TIRS Dryout Cryocooler cooldown Earth Shield Deploy FPE/FPA Commissioning Instrument Power-on, Thermal Conditioning, and detector checkouts 5 35 Initial Earth Scenes OLI Calibration Acquisitions TIRS Calibration Acquisitions Transition to nominal DAM scenes Instrument calibration acquisitions & ascent to final orbit Landsat 8 Underfly Extended Lunar Calibration Ascent burns 3 & 4 Burn operations via RT CMD (configuration) and MATS (execution) Instrument operations via ATS 36 64 Instrument calibration acquisitions at operational altitude Operations performed via ATS Prepares instruments for transition to Normal Ops TIRS Calibration Acquisitions 65 90 OLI Calibration Acquisitions Acceptance & Handover: Project takes acceptance of spacecraft, instruments, and ground system at L+90 On-orbit Acceptance Review (OAR) (project-chaired review) Post Launch Assessment Review (PLAR) (L+100 days) Mission responsibility/ownership is transferred from NASA to USGS at the Mission Transition & Handover Review (MTHR) following PLAR
Summary Landsat 9 is ready for launch September 16, 2021! Performance of observatory is excellent Testing indicates that instruments meet Level 1 requirements, and will provide data equal to or better than Landsat 8 Landsat 9 System and Team are Ready to Proceed to Launch and Operations
