Page 1 Landsat Data Continuity Mission Status Jim Irons LDCM Project Scientist Earth Sciences Division NASA Goddard Space Flight Center Greenbelt, Maryland LDCM SRR/MDR/PNAR April 2008 October 25, 2012
Page 2 Landsat History Enabling 40 Years of Global Land Surface Observations
Page 3 NASA / USGS Parnership NASA leads development and launch of satellite observatory Spacecraft Two-instrument payload –Operational Land Imager – OLI –Thermal Infrared Sensor – TIRS USGS leads ground system development and post- launch operations Mission Operations Center – MOC Ground Network Element – GNE Data Processing and Archive System (DPAS)
Page 4 Project Status Courtesy of Orbital
Page 5 Launch Launch will be from Vandenberg Air Force Base (VAFB), California Lower stage arrived via Antonov AN-124 aircraft flight on August 27 Upper stage Centaur arrived September 14 via truck Landsat 8 on schedule for February 11 launch date
Page 6 Observatory Testing at Orbital The observatory is in the final phases of testing at the Orbital Science Corp. facility in Gilbert, Arizona Successfully completed electromagnetic interference / electromagnetic compatibility (EMI/EMC) in August Successfully completed dynamics testing (acoustics and vibration) in September The final phase of testing, thermal vacuum (T/Vac) began Saturday, October 20 Shipment to VAFB scheduled for December EMI/EMC Test Chamber at Orbital
Page 7 Integrated Satellite Observatory
Page 8 Operational Land Imager (OLI) OLI built by Ball Aerospace & Technology Corp. (BATC) of Boulder, CO Contract awarded in July 2007 Critical design review held October, 2008 Fully assembled & tested OLI shipped to spacecraft vendor on October 02, 2011
Page 9 Fully Assembled OLI Instrument description 8 VIS/NIR/SWIR bands w/ 30 m spatial resolutions one panchromatic band w/ 15 m resolution Pushbroom sensor Four-mirror telescope with front aperture stop Focal Plane Assembly (FPA) consisting of 14 sensor chip assemblies, passively cooled Absolute radiometric accuracy < 5% Mass: 450Kg Operational Power: 160 W Size: 1.8 m x 2 m x 1 8 m
Page 10 Thermal Infrared Sensor (TIRS) TIRS built in-house at NASA/Goddard Space Flight Center TIRS was officially added to the scope of the mission in December 2009 Critical Design Review held April 2010 Fully assembled & tested TIRS shipped to Orbital on February 08, 2012 TIRS was not added to the payload until western states water managers, with organization by the Western States Water Council, advocated for restoration of Landsat thermal imaging requirements
Page 11 Fully Assembled TIRS Instrument description Two spectral bands at 10.8 and 12 micrometers 100 m spatial resolution Pushbroom LWIR sensor Four-lens telescope FPA consisting of three 2-dimensional Quantum Well Infrared Photodector (QWIP) sensor chip assemblies Mechanically cooled focal plane; BATC provided cryo cooler 300K < 0.4 Mass: 240 Kg Operational Power: 380 W Size: 80 cm x 76 cm x 43 cm (with earth shield deployed)
Page 12 OLI Spectral Bands
Page 13 L7 ETM+ Thermal BandLDCM TIRS Band Requirements Band 660 m LWIR m LWIR – 11.30Band m LWIR – 12.50Band 11 TIRS and ETM+ Spectral Bands
Page 14 Top Level Mission Ops Concept - Continuity Fly Landsat 8 in legacy orbit (705 km, near-polar, sun-synchronous) Ground tracks maintained along heritage WRS-2 paths with 10:00 a.m. equatorial crossing time & 16 day repeat period Collect image data for multiple spectral bands (Vis/NIR/SWIR/TIR) across 185 km swath along each path Provide coverage of global land mass each season by scheduling the collection of 400 WRS-2 scenes per day Maintain rigorous calibration Archive data and distribute data products Provide nondiscriminatory access to general public, generate Level 1 data products, distribute data products at no cost upon request Direct broadcast of data to network of international ground stations having memoranda-of-understanding with USGS
Page 15 Web Sites FaceBook Page Twitter Site
Page 16 Back Up
Page 17 February 11, 2013
Page 18 Polar Orbits for Global Views
Page 19 Urgency
Page 20 ETM+ SLC Failure Impact Note that the images show partial scenes, from the western edge through the scene center.
Page 21 LDCM Spacecraft Spacecraft contract awarded to General Dynamics Advanced Information Systems (GDAIS) in April, 2008 GDAIS sold to Orbital Sciences Corporation in April 2010 Space craft will accommodate OLI and TIRS Provides pointing, power, data capacity, etc. to support LDCM operations Orbital Sciences Corporation is integrating OLI and TIRS onto the spacecraft at their Gilbert, AZ facility and will ship the observatory to the launch site in Autumn 2012
Page 22 Ground System Operational Architecture 22