@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<https://gcmd.earthdata.nasa.gov/kms/concept/0db82778-12de-4cac-9a86-8f2b97feb7f1>
  skos:changeNote """2016-06-09 11:32:03.0 [epneff] added altLabel 
insert AltLabel (id: null
text: LANDSAT-4 (LAND REMOTE-SENSING SATELLITE-4)
language code: en); 
""", """2019-12-31 16:25:25.0 [sritz]  
update Definition (Landsat 4 is the fourth satellite of the Landsat program. It was launched on
July 16th, 1982, with the primary goal of providing a global archive of
satellite photos. Although the Landsat Program is managed by NASA, data from
Landsat 4 was collected and distributed by the USGS. Landsat 4 is no longer in
operation, due to technical failure. It finally ceased transmission in 1993,
far beyond its designed life expectancy of five years. The satellite orbit
continues to be maintained by NASA.

Landsat 4 had a maximum transmission bandwidth of 85 Mbit/s, and carried an
updated Multi-Spectral Scanner used on previous Landsats, and a Thematic
Mapper. It had a maximum 30 m resolution. Shortly after launch, the satellite
lost half of its solar power, prompting fears the satellite would fail sooner
than expected. This prompted the early launch of Landsat 5, a satellite
identical in specification to Landsat 4.

[Summary provided by NASA.]


Group: Platform_Details
   Entry_ID: LANDSAT-4
   Group: Platform_Identification
      Platform_Category: Earth Observation Satellites
      Platform_Series_or_Entity: LANDSAT
      Short_Name: LANDSAT-4
   End_Group
   Group: Platform_Associated_Instruments
      Short_Name: MSS
      Short_Name: TM
   End_Group
   Group: Orbit
      Orbit_Altitude: 705 km
      Orbit_Inclination: 98.2 degree
      Equator_Crossing: 9:45 AM (&#177;15 min.) local time (descending node)
      Period: 99 minutes
      Repeat_Cycle: 16 days
      Orbit_Type: LEO > Low Earth Orbit > Polar Sun-Synchronous
   End_Group
   Creation_Date: 2007-02-01
   Online_Resource: https://landsat.gsfc.nasa.gov/landsat-4/
   Online_Resource: https://www.usgs.gov/land-resources/nli/landsat/landsat-4
   Group: Platform_Logistics
      Launch_Date: 1982-07-16
      Launch_Site: Vandenberg Air Force Base, USA
      Design_Life: 5 Years
      Primary_Sponsor: NASA
      Primary_Sponsor: USGS
   End_Group
End_Group); 
update Definition (https://landsat.gsfc.nasa.gov/landsat-4/); 
delete Resource (null); 
""" ;
  skos:definition """Landsat 4 is the fourth satellite of the Landsat program. It was launched on
July 16th, 1982, with the primary goal of providing a global archive of
satellite photos. Although the Landsat Program is managed by NASA, data from
Landsat 4 was collected and distributed by the USGS. Landsat 4 is no longer in
operation, due to technical failure. It finally ceased transmission in 1993,
far beyond its designed life expectancy of five years. The satellite orbit
continues to be maintained by NASA.

Landsat 4 had a maximum transmission bandwidth of 85 Mbit/s, and carried an
updated Multi-Spectral Scanner used on previous Landsats, and a Thematic
Mapper. It had a maximum 30 m resolution. Shortly after launch, the satellite
lost half of its solar power, prompting fears the satellite would fail sooner
than expected. This prompted the early launch of Landsat 5, a satellite
identical in specification to Landsat 4.

[Summary provided by NASA.]


Group: Platform_Details
   Entry_ID: LANDSAT-4
   Group: Platform_Identification
      Platform_Category: Earth Observation Satellites
      Platform_Series_or_Entity: LANDSAT
      Short_Name: LANDSAT-4
   End_Group
   Group: Platform_Associated_Instruments
      Short_Name: MSS
      Short_Name: TM
   End_Group
   Group: Orbit
      Orbit_Altitude: 705 km
      Orbit_Inclination: 98.2 degree
      Equator_Crossing: 9:45 AM (&#177;15 min.) local time (descending node)
      Period: 99 minutes
      Repeat_Cycle: 16 days
      Orbit_Type: LEO > Low Earth Orbit > Polar Sun-Synchronous
   End_Group
   Creation_Date: 2007-02-01
   Online_Resource: https://landsat.gsfc.nasa.gov/landsat-4/
   Online_Resource: https://www.usgs.gov/land-resources/nli/landsat/landsat-4
   Group: Platform_Logistics
      Launch_Date: 1982-07-16
      Launch_Site: Vandenberg Air Force Base, USA
      Design_Life: 5 Years
      Primary_Sponsor: NASA
      Primary_Sponsor: USGS
   End_Group
End_Group"""@en ;
  skos:altLabel "LANDSAT-4 (LAND REMOTE-SENSING SATELLITE-4)"@en ;
  skos:prefLabel "LANDSAT-4"@en ;
  skos:inScheme <https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/platforms> ;
  skos:broader <https://gcmd.earthdata.nasa.gov/kms/concept/3cc4a1e8-3b94-4567-90b3-32137aec2d9e> ;
  a skos:Concept .

<https://gcmd.earthdata.nasa.gov/kms/concept/3cc4a1e8-3b94-4567-90b3-32137aec2d9e>
  skos:prefLabel "LANDSAT"@en ;
  a skos:Concept ;
  skos:narrower <https://gcmd.earthdata.nasa.gov/kms/concept/0db82778-12de-4cac-9a86-8f2b97feb7f1> .

