Page 1 Landsat 8 The Landsat Data Continuity Mission Jim Irons LDCM Project Scientist Earth Sciences...

Landsat 8The Landsat Data Continuity Mission

Jim IronsLDCM Project Scientist

Earth Sciences Division

NASA Goddard Space Flight Center

Greenbelt, Maryland

LDCM SRR/MDR/PNAR 22-24 April 2008

Western States ET WorkshopBoise, Idaho

October 22, 2012

Landsat History

Enabling 40 Years of Global Land Surface Observations

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)

Project StatusProject Status

Courtesy of Orbital

Launch

Atlas V 401 launch vehicle selected by NASA Kennedy Space Center Contract with United Launch

Alliance (ULA) Kickoff meeting held in October

2010

Launch will be from Vandenberg Air Force Base (VAFB), California

Landsat 8 on schedule for February 11 launch date

LDCM Atlas V Lower Stage

ULA Facility, Decatur, Alabama

Upper and Lower Stages Now at VAFB

Lower stage arrived via Antonov AN-124 aircraft flight on August 27

Upper stage Centaur arrived September 14 via truck

Integrated Satellite ObservatoryIntegrated Satellite Observatory

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

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 2009Critical Design Review held April 2010Fully 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

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

• NEdT @ 300K < 0.4

• Mass: 240 Kg

• Operational Power: 380 W

• Size: 80 cm x 76 cm x 43 cm (with earth shield deployed)

L7 ETM+ Thermal Band LDCM TIRS Band Requirements

Band 6 60 m LWIR 10.00 - 12.50 100 m LWIR 10.30 – 11.30 Band 10

100 m LWIR 11.50 – 12.50 Band 11

TIRS and ETM+ Spectral Bands

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

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

OLI Spectral Bands

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

Landsat 8 launch date is February 11, 2013 Nominal operations begin 90 days after launch

OLI and TIRS will provide the best Landsat data in the proud, 40 year history of the program TIRS would not be on the satellite without the

support of western states water managers

USGS EROS will distribute Landsat 8 data products for free Continues current Landsat data policy

Take-Away MessagesTake-Away Messages

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Web Sites

http://landsat.gsfc.nasa.gov

http://landsat.usgs.gov

http://www.nasa.gov/landsat

FaceBook Page

http://www.facebook.com/NASA.Landsat

Twitter Site http://twitter.com/#!/NASA_Landsat

Back Up

February 11, 2013

Polar Orbits for Global Views

Urgency

ETM+ SLC Failure Impact

Note that the images show partial scenes, from the western edge through the scene center.

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

Ground System Operational ArchitectureGround System Operational Architecture

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