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What were ERS1 and ERS2?
The ERS programme was composed of two missions, ERS-1 and ERS-2, which were launched into the same orbit in 1991 and 1995 respectively. The two spacecraft were designed as identical twins with one important difference – ERS-2 included an extra instrument (GOME) designed to monitor ozone levels in the atmosphere.
What does the Radarsat 2 do?
Ice and environmental monitoring, marine surveillance, disaster management, resource management and mapping.
What orbit is ERS in?
In July 1991 ESA’s first earth observation mission was launched into space with ERS-1….ERS.
| Semi-major axis | 7147 km |
|---|---|
| Orbit altitude (mean) | 785 km |
| Inclination angle | 98.5° |
| Orbital period | 100 min |
| Orbit | polar, sun-synchronous |
What are two type of ERS?
There are two types of endoplasmic reticulum: rough endoplasmic reticulum (rough ER) and smooth endoplasmic reticulum (smooth ER). Both types are present in plant and animal cells. The two types of ER often appear as if separate, but they are sub-compartments of the same organelle.
What is ERS SAR?
ERS synthetic aperture radar (SAR) provides high resolution, two-dimensional images. Image data was acquired for a maximum duration of approximately 10 minutes per orbit.
What is ESR1 gene?
GeneCards Summary for ESR1 Gene ESR1 (Estrogen Receptor 1) is a Protein Coding gene. Diseases associated with ESR1 include Estrogen Resistance and Breast Cancer. Among its related pathways are Apoptosis and survival_Anti-apoptotic action of nuclear ESR1 and ESR2 and Signaling events mediated by HDAC Class II.
Is RADARSAT-2 still operational?
By mid-August 2015, the addition of the Canada Centre for Mapping and Earth Observation (CCMEO, formerly CCRS) X Band receiving station in Inuvik has significantly increased RADARSAT-2 downlink capacity in Canada. As of January 2020, RADARSAT-2 is entering its 12th operational service year.
How many SAR satellites are there?
Overall, nearly 50 are operational, more than double the number in 2018. * SAR satellite launches By capturing the echoes of microwave beams, modestly sized SAR antennas can produce pictures with resolutions as sharp as a half a meter or less.
What is the difference between ERS-1 and ERS -2?
ERS-2 has a total mass of 2,516 kg at launch (about 200 kg more than ERS-1). The mission design life requirement was extended to 3 years. ERS-2 has also the same mission objectives as ERS-1, plus an atmospheric chemistry mission objective (with GOME).
What is the altitude of ERS-2?
Altitude = 780 km (mean); inclination = 98.5º, local crossing time of the equator = 10:30 AM, orbital period is about 100 minutes. Repeat cycle = 3 days or 35 days. • The ERS-2 mission ended on Sept. 5, 2011, after the satellite’s average altitude had already been lowered from 785 km to about 573 km.
What happened to the ERS-1 and E RS-2 missions?
The ERS-1 mission ended on 10 March 2000, far exceeding its expected lifespan. The last ERS-2 SAR data was acquired on 4 July 2011 and the ERS-2 mission itself ended on 5 September 2011. Download data from the ERS-1 and ERS-2 SAR mission through the ESA Online Dissemination System. The data is freely available to registered users.
What is the repeat cycle of the ERS-2 mission?
Repeat cycle = 3 days or 35 days. • The ERS-2 mission ended on Sept. 5, 2011, after the satellite’s average altitude had already been lowered from 785 km to about 573 km. At this height, the risk of collision with other satellites or space debris is greatly reduced.