User:Miro9363/sandbox

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This is a student user template for Remote Sensing class

This section evaluates the current Sentinel-1 article. What's lacking in each section? Are there additional sections that could be added?

• citations don't appear to always be used throughout the article

• The intro section should be a clear overview of the article. Needs more development.
• Doesn't flow very well
• Doesn't seem necessary to talk about the launch date here. If this information does stay, the equivalent info about 1-B should also be included

• I think it's worth explaining the modes of difference of the SAR.
• I'm confused on what the second bullet point is on there for/doesn't seem to be an instrument

• could include more information about each application
• info about the earthquake at the end of this section seems disconnected

• does not flow well at all.

• I think it would be cool to create a table like Landsat did for the different launches (Satellite chronology). might not be as fitting because only 2 of the spacecrafts have been launched.
• a better summary of launches A and B are needed on the page.

• a better introduction to this section would be good

Reference 5- Twitter doesn't seem like a reliable source. Maybe could use [1] instead.

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This section describes what our team will be changing/adding to the article, as well as any sources we will be using.

Intro section:

Sentinel-1 is the first of the Copernicus Program satellite constellation carried out by the ESA^[1] This space mission is composed of two satellites, Sentinel 1A and Sentinel 1B, that carry a C-band Synthetic Aperture Radar (SAR) instrument which provides a collection of data in all-weather, day or night.

On 12 March 2010, the European Space Agency and Thales Alenia Space signed a contract worth €270 million to build the second satellite of the Sentinel-1 pair.

Currently, both Sentinel 1-A and 1-B have been launched. The first satellite, Sentinel 1A, launched on launched on 3 April 2014, and Sentinel 1B was launched on April 25, 2016. Both satellites lifted off from the same location in Kourou, French Guiana, and each on a Soyuz Rocket. ^[2] Sentinel 1-C and 1-D are in development with launch dates to be determined.

There are a wide range of applications for the data collected via the Sentinel-1 mission. A few of these uses include sea and land monitoring, emergency response due to environmental disasters, and economic applications.

Applications:

current "Sentinel-1 will provide continuity of data from ERS and Envisat missions, with further enhancements in terms of revisit, coverage, timeliness and reliability of service.

A summary of the main applications^[3] of Sentinel-1 include:

• Marine Monitoring
  • Sea-ice Levels and Conditions
  • Ocean Oil Spills
  • Ship Activity
  • Marine Winds
• Land Monitoring
  • Agriculture
  • Forestry
• Emergency Response
  • Flooding
  • Landslide and Volcanic
  • Earthquakes
    • Shortly after the August 2014 South Napa earthquake, data collected by Sentinel 1A was used to develop an interferometric synthetic aperture radar, or InSAR, image of the affected region. The Sentinel-1 satellites are expected to make analysis of earthquakes using InSAR techniques quicker and simpler."

Sentinel-1 satellite characteristics:^[4][5][6]

• 7 year lifetime (12 years for consumables)
• Launcher: Soyuz
• Near-polar (98.18°) Sun-synchronous orbit
• 12-day repeat cycle
• 175 revolutions per cycle
• 98.6 minute orbital period
• 3-axis altitude stabilization
• 2300 kg launch mass
• 3.9 by 2.6 by 2.5 meter dimensions
• 1 dB radiometric accuracy

Sentinel-1's 4 operational/acquisition modes:^[4][7][8]

• Strip Map (SM) Mode features 5 by 5 meter spacial resolution and an 80 km swath.
  • Sole uses of SM are to monitor small islands as well as emergency management for extraordinary events upon request.
• Interferometric Wide Swath (IW) Mode features 5 by 20 meter spacial resolution and a 250 km swath.
  • This is the main operational mode over land.
  • IW accomplishes interferometry through burst synchronization
• Extra Wide Swath (EW) Mode features 25 by 100 meter spacial resolution and a 400 km swath.
  • EW is used mainly to monitor wide coastal areas for phenomena such as shipping traffic and potential environmental hazards like oil spills or changes in sea-ice.
• Wave (WV) Mode features 5 by 20 meter resolution and a low data rate. It produces 20 by 20 km sample images along the orbit at intervals of 100 km.
  • This is the main operational mode over open ocean.

Sentinel-1's data products:^[7]

• Raw Level 0 data
• Processed Level 1 Single Look Complex (SLC) data:
  • Complex images with phase and amplitude of specified areas
• Ground Range Detected (GRD) Level 1 data:
  • Only systematically distributed multi-looked intensity
• Level 2 Ocean (OCN) data:
  • Systematically distributed data of ocean's geophysical parameters