Landsat 9

Summary

Landsat 9 is an Earth observation satellite launched on 27 September 2021 from Space Launch Complex-3E at Vandenberg Space Force Base on an Atlas V 401 launch vehicle.[3] NASA is in charge of building, launching, and testing the satellite, while the United States Geological Survey (USGS) operates the satellite, and manages and distributes the data archive.[4] It is the ninth satellite in the Landsat program, but Landsat 6 failed to reach orbit. The Critical Design Review (CDR) was completed by NASA in April 2018, and Northrop Grumman Innovation Systems (NGIS) was given the go-ahead to manufacture the satellite.[5]

Landsat 9
LANDSAT-9.jpg
Landsat 9 in orbit
Mission typeSatellite imagery
OperatorNASA / USGS
COSPAR ID2021-088A Edit this at Wikidata
SATCAT no.49260
WebsiteLandsat 9
Mission duration5 years (planned)
15 years - with fuel (planned)[1]
9 months, 8 days (in progress)
Spacecraft properties
SpacecraftLandsat 9
Spacecraft typeLandsat
BusLEOStar-3
ManufacturerNorthrop Grumman Innovation Systems
Launch mass2,711 kg (5,977 lb)
Dimensions4.6 m × 3 m × 3 m (15.1 ft × 9.8 ft × 9.8 ft)
Powerwatts
Start of mission
Launch date27 September 2021,
18:12:00 UTC[1][2]
RocketAtlas V 401 (AV-092)
Launch siteVandenberg, SLC-3E
ContractorUnited Launch Alliance
Entered serviceJanuary 6, 2022 [1]
Orbital parameters
Reference systemGeocentric orbit
RegimeSun-synchronous orbit
Altitude705 km (438 mi)
Inclination98.2°
Period99.0 minutes
Repeat interval16 days
Instruments
Operational Land Imager-2 (OLI-2)
Thermal Infrared Sensor-2 (TIRS-2)
LANDSAT 9.png
LANDSAT 9 mission patch
Landsat 10 →
 

DesignEdit

The design and construction of Landsat 9 were assigned by NASA, under a delivery order contract to Orbital ATK, in October 2016. The purchase cost of US$129.9 million is part of a five-year contract between the two entities. The budget that provides for initial work on Landsat 9 also calls for research into less expensive and smaller components for future Landsat hardware.[4]

Landsat 9 will largely replicate the functions of its predecessor Landsat 8. The former will include near-identical copies of remote sensors: the Operational Land Imager (OLI) and the Thermal Infrared Sensor (TIRS) instruments – optical and thermal sensors respectively – that will be designated OLI-2 and TIRS-2;[6] the latter will be upgraded to a risk class B implementation (high priority, high national significance, high complexity)[7] while no changes will be applied to OLI-2.[8]

NASA selected Ball Aerospace & Technologies to provide the OLI-2 instrument through a sole source procurement. OLI-2 will collect data for nine spectral bands with a ground sample distance (GSD) of 30 m for all bands except the panchromatic band, which has a 15 m GSD.[9]

NASA assigned the TIRS-2 instrument as a directed development to Goddard Space Flight Center (GSFC). Design changes to the TIRS-2 are intended to address the stray light and Scene Select Mechanism (SSM) encoder problems experienced with the TIRS on Landsat 8.[6] Testing and assessment of the TIRS-2 demonstrate the stray light magnitude has been reduced to 1%.[10]

LaunchEdit

Landsat 9 was launched on 27 September 2021 at 18:12 UTC.[11] This is 4–5 years after the end of Landsat 7's mission design lifetime and near the end of its maximum (fuel supply) lifetime. The Launch Services Program (LSP) at the Kennedy Space Center (KSC) controlled the launch operations, which was conducted from Vandenberg Space Force Base.[12] The launch of Landsat 9 was delayed to September 2021 due to the effects of the COVID-19 pandemic on spacecraft work in Arizona.[3]

GalleryEdit

See alsoEdit

ReferencesEdit

  1. ^ a b c Costa, Jason (27 September 2021). "Landsat 9 Continues a Legacy of 50 Years". blogs.nasa.gov. NASA. Retrieved 28 September 2021.
  2. ^ "NASA and United Launch Alliance Update Landsat 9 Target Launch Date – Kennedy Space Center". blogs.nasa.gov. NASA. 15 September 2021. Retrieved 15 September 2021.   This article incorporates text from this source, which is in the public domain.
  3. ^ a b "Coronavirus delays push back launch of next Landsat to September 2021". Spaceflight Now. 7 September 2020. Retrieved 8 September 2020.
  4. ^ a b "NASA, USGS Begin Work on Landsat 9 to Continue Land Imaging Legacy". NASA. Retrieved 16 April 2015.   This article incorporates text from this source, which is in the public domain.
  5. ^ "FY 2021 Congressional Justification: Landsat 9 – Schedule Commitments/Key Milestones" (PDF). NASA. 10 February 2020. p. 321. Retrieved 7 May 2020.   This article incorporates text from this source, which is in the public domain.
  6. ^ a b Markham, Brian L.; et al. (September 2016). Butler, James J; Xiong, Xiaoxiong (Jack); Gu, Xingfa (eds.). "Landsat 9: status and plans". Proceedings of the SPIE. Earth Observing Systems XXI. 9972: 6. Bibcode:2016SPIE.9972E..0GM. doi:10.1117/12.2238658. ISBN 9781510603356. S2CID 3929985. 99720G.
  7. ^ "Risk Classification for NASA payloads" (PDF). nodis3.gsfc.nasa.gov.   This article incorporates text from this source, which is in the public domain.
  8. ^ "Landsat 9 Science Instrument Details". Goddard Space Flight Center. NASA. Archived from the original on 7 April 2017. Retrieved 7 May 2020.   This article incorporates text from this source, which is in the public domain.
  9. ^ "Landsat 9 Instruments". Goddard Space Flight Center. NASA. Retrieved 10 January 2019.   This article incorporates text from this source, which is in the public domain.
  10. ^ Montanaro, Matthew; et al. (5 November 2018). "Landsat 9 Thermal Infrared Sensor 2 Preliminary Stray Light Assessment". IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium: 8853–8856. doi:10.1109/IGARSS.2018.8519394. hdl:2060/20190001872. ISBN 978-1-5386-7150-4. S2CID 53227338.
  11. ^ "LAUNCH ALERT! We are heading to the West Coast for our next launch. #AtlasV is scheduled to launch #Landsat 9 for @NASA_LSP and @NASA_Landsat next Monday from Vandenberg Space Force Base. Liftoff is 11:12 PDT (14:12 EDT; 18:12 UTC)". Twitter. Retrieved 27 September 2021.
  12. ^ Amos, Jonathan (27 September 2021). "Landsat-9: 'Satellite of record' launches to picture Earth". BBC.

External linksEdit

  • USGS Landsat Website