@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix ns0: <http://gcmd.gsfc.nasa.gov/kms#> .

<https://gcmd.earthdata.nasa.gov/kms/concept/c7279e54-f7c1-4ee7-a957-719d6021a3f6>
  skos:changeNote """2018-11-05 08:36:01.0 [tstevens]  
insert AltLabel (id: null
category: primary
text: SENTINEL-1A
language code: en); 
update Resource (image); 
""", """2019-02-22 12:49:03.0 [mmorahan]  
insert WeightedRelation (id: null
related concept uuid: ed400e7c-229e-48be-9a93-84f2fc864448
relationship type: null
relationship value: null
generated by: null); 
""", """2019-03-28 12:56:35.0 [mmorahan]  
delete WeightedRelation (null); 
""", """2019-02-22 13:54:55.0 [mmorahan]  
insert WeightedRelation (id: null
related concept uuid: 1c53d85e-3792-4081-9748-192fd3140aa6
relationship type: null
relationship value: null
generated by: null); 
""", """2015-09-23 19:55:42.0 [saritz] Rename Concept 
update PrefLabel (SENTINEL-1A); 
""", """2018-06-12 15:15:42.0 [mmorahan] Move Concepts 
delete broader relation (null); 
add broader relation (SENTINEL-1A [c7279e54-f7c1-4ee7-a957-719d6021a3f6,345757] - Sentinel-1 [007c3084-89db-458e-8387-14e192b6cb8e,367691]); 
""" ;
  skos:inScheme <https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/platforms> ;
  ns0:resource [ ] ;
  skos:prefLabel "SENTINEL-1A"@en ;
  a skos:Concept ;
  skos:broader <https://gcmd.earthdata.nasa.gov/kms/concept/007c3084-89db-458e-8387-14e192b6cb8e> ;
  ns0:altLabel [ ] ;
  skos:definition """The SENTINEL-1 mission is the European Radar Observatory for the Copernicus joint initiative of the European Commission (EC) and the European Space Agency (ESA). Copernicus, previously known as GMES, is a European initiative for the implementation of information services dealing with environment and security. It is based on observation data received from Earth Observation satellites and ground-based information.

The SENTINEL-1 mission includes C-band imaging operating in four exclusive imaging modes with different resolution (down to 5 m) and coverage (up to 400 km). It provides dual polarisation capability, very short revisit times and rapid product delivery. For each observation, precise measurements of spacecraft position and attitude are available.

Synthetic Aperture Radar (SAR) has the advantage of operating at wavelengths not impeded by cloud cover or a lack of illumination and can acquire data over a site during day or night time under all weather conditions. SENTINEL-1, with its C-SAR instrument, can offer reliable, repeated wide area monitoring.

The mission is composed of a constellation of two satellites, SENTINEL-1A and SENTINEL-1B, sharing the same orbital plane.

SENTINEL-1 is designed to work in a pre-programmed, conflict-free operation mode, imaging all global landmasses, coastal zones and shipping routes at high resolution and covering the global ocean with vignettes. This ensures the reliability of service required by operational services and a consistent long term data archive built for applications based on long time series.

Source: https://sentinel.esa.int/web/sentinel/missions/sentinel-1


Group: Platform_Details
   Entry_ID: SENTINEL-1
   Group: Platform_Identification
      Platform_Category: Earth Observation Satellites
      Platform_Series_or_Entity: Sentinel GMES
      Short_Name: SENTINEL-1
   End_Group
   Group: Platform_Associated_Instruments
      Short_Name: SENTINEL-1 C-SAR
   End_Group
   Group: Orbit
      Orbit_Altitude: 693 km
      Orbit_Type: LEO > LOW EARTH ORBIT > POLAR SUN-SYNCHRONOUS
   End_Group
   Creation_Date: 2009-12-18
   Online_Resource: https://sentinel.esa.int/web/sentinel/missions/sentinel-1
   Sample_Image: http://www.esa.int/images/sentinel2_alcatel_M.gif
   Group: Platform_Logistics
      Launch_Date: 2014-04-03
      Launch_Site: KOUROU, FRENCH GUIANA
      Design_Life: 7 Years
      Primary_Sponsor: ESA/EU
   End_Group
End_Group"""@en .

<https://gcmd.earthdata.nasa.gov/kms/concept/007c3084-89db-458e-8387-14e192b6cb8e>
  skos:prefLabel "SENTINEL-1"@en ;
  a skos:Concept ;
  skos:narrower <https://gcmd.earthdata.nasa.gov/kms/concept/c7279e54-f7c1-4ee7-a957-719d6021a3f6> .