What is the meaning of Envisat?
Envisat (“Environmental Satellite”) is a large inactive Earth-observing satellite which is still in orbit and now considered as space debris. Operated by the European Space Agency (ESA), it was the world’s largest civilian Earth observation satellite.
What does Envisat measure?
EnviSat is an Earth observation mission of ESA (European Space Agency). The overall objectives are: studying and monitoring the Earth’s environment on various scales, from local through regional to global. Monitoring and management of the Earth’s resources, both renewable and nonrenewable.
What orbit is Envisat in?
sun-synchronous polar orbit
Envisat flew in a sun-synchronous polar orbit of about 800 km altitude. The repeat cycle of the reference orbit was 35 days, and for most sensors, being wide swath, it provided a complete coverage of the globe within one to three days.
How big is Envisat?
about 30 feet long
Envisat is by all accounts a huge satellite. It is about 30 feet long (9 meters) and 16 feet wide (5 m). The spacecraft weighs 17,600 pounds (8,000 kilograms) and has a huge sail-like solar array that is 16 feet wide (5 m) and 46 feet long (14 m).
What are the two type of ERS?
There are two types of endoplasmic reticulum: rough endoplasmic reticulum (rough ER) and smooth endoplasmic reticulum (smooth ER).
What are the 4 types of resolution?
There are four types of resolution to consider for any dataset—radiometric, spatial, spectral, and temporal. Radiometric resolution is the amount of information in each pixel, that is, the number of bits representing the energy recorded.
What are the sensors used in spot satellites?
|Sensor||Resolution (m)||Spectral Bands (µm)|
|Vegetation Monitoring Instrument (VMI)||1,000||0.45-0.52 (blue)|
|0.78-0.89 (near IR)|
Who made spot satellite?
the French National Centre for Space Studies
About SPOT Series Conceived by the French National Centre for Space Studies (CNES), five satellites were launched between 1986 and 2015, and in revealing Earth’s surface in detail they led to new applications in mapping, vegetation monitoring, land use and land cover, and the impacts of natural disasters.
What is remote sensing satellite?
Remote sensing is the process of detecting and monitoring the physical characteristics of an area by measuring its reflected and emitted radiation at a distance (typically from satellite or aircraft). Special cameras collect remotely sensed images, which help researchers “sense” things about the Earth.
What is the Envisat satellite?
In March 2002, the European Space Agency launched Envisat, an advanced polar-orbiting Earth observation satellite which provided measurements of the atmosphere, ocean, land, and ice. The Envisat satellite had an ambitious and innovative payload that ensured the continuity of the data measurements of the ESA ERS satellites.
When will the Envisat spacecraft be operational?
• The Envisat spacecraft and its payload are operational in 2011 in the extended mission phase (phase E3). The mission is expected to remain operational until sometime in 2014. However, in its new lower orbit of 783 km (since end of Oct. 2010) with no orbit maintenance services, the orbit inclination will drift. 32)
What is Envisat data used for?
Envisat data supported Earth science research and allowed monitoring of the evolution of environmental and climatic changes. Furthermore, the data facilitated the development of operational and commercial applications.
What is Envisat mission?
EnviSat (Environmental Satellite) EnviSat is an Earth observation mission of ESA (European Space Agency). The overall objectives are: studying and monitoring the Earth’s environment on various scales, from local through regional to global. Monitoring and management of the Earth’s resources, both renewable and nonrenewable.