Image: Baltic blooms
The Copernicus Sentinel-2 mission takes us over the green algae blooms swirling around the Baltic Sea.
Environment
17 hours ago
0
7
News tagged with satellite data
Related topics:
maximum sustained winds
· tropical cyclones
· satellite imagery
· tropical rainfall
· nasa
Shrinking of Greenland's glaciers began accelerating in 2000, research finds
Satellite data has given scientists clues about how, when and why Greenland's glaciers are shrinking—and shows a sharp increase in glacial retreat beginning about 2000, according to new research presented this week.
Earth Sciences
Dec 11, 2019
21
246
One-third of recent global methane increase comes from tropical Africa
Concentrations of methane, a greenhouse gas about 28 times more potent than carbon dioxide, have risen steadily in Earth's atmosphere since 2007. Although several potential explanations, including an increase in methane emissions ...
Environment
Dec 11, 2019
0
69
The Antarctic: Study provides data about the structure of the icy continent
The Antarctic is one of the parts of Earth that we know the least about. Due to the massive ice shield, the collection of geophysical information on site is extremely difficult and expensive. Satellite data from the European ...
Earth Sciences
Dec 09, 2019
0
12
New biomass map to take stock of the world's carbon
The first of a series of global maps aimed at quantifying change in carbon stored as biomass across the world's forests and shrublands has been released today by ESA's Climate Change Initiative at COP25—the United Nation ...
Earth Sciences
Dec 09, 2019
0
10
35-year data record charts sea-temperature change
Four trillion satellite measurements, taken over four decades from 1981 to 2018, have been merged to create a continuous global record that will help to understand the science behind Earth's climate.
Earth Sciences
Dec 06, 2019
0
7
Cooling role of particulate matter on warming Earth stronger than previously thought
The relationship between aerosols (particulate matter) and their cooling effect on the Earth due to the formation of clouds is more than twice as strong as was previously thought. As the amounts of aerosols decrease, climate ...
Environment
Dec 03, 2019
1
948
Soil study shows Australia at its most stripped back
New research from The Australian National University (ANU) and Geoscience Australia could provide a much clearer picture of the Australian landscape, and how to better manage it under a changing climate.
Environment
Dec 03, 2019
0
2
Satellites track status of nation's food supply
Farmers across the Midwest are in a race to finish harvesting their corn, soybean, and other staples of the Thanksgiving dinner table before the first crop killing freeze sets in. September rains made a late harvest even ...
Environment
Nov 29, 2019
0
8
NASA embarks on five US expeditions targeting air, land and sea
NASA is sending five airborne campaigns across the United States in 2020 to investigate fundamental processes that ultimately impact human lives and the environment, from snowstorms along the East Coast to ocean eddies off ...
Environment
Nov 26, 2019
0
6
Satellite Data System
The Satellite Data System (SDS) is a system of United States military communications satellites. At least three generations have been used: SDS-1 from 1976 to 1987; SDS-2 from 1989 to 1996; SDS-3 from 1998 to the present. SDS satellites have a highly elliptical orbit, going from about 300 kilometers at perigee to roughly 39,000 km at apogee in order to allow communications with polar stations that cannot contact geosynchronous satellites. The high apogee meant that the polar regions were visible for long amounts of time, and only two satellites were required in order to achieve constant communications ability. The SDS satellites were constructed by Hughes Aircraft.
The primary purpose of the SDS satellites is to relay imagery from low-flying reconnaissance satellites to ground stations in the United States.
Each SDS-1 satellite had 12 channels available for ultra-high frequency communication. They were cylindrical in shape, roughly 25 feet (7.6 m) long. 980 watts of electrical power were available from solar panels and batteries. The SDS-1 had a mass of 1385 pounds (630 kilograms) and was launched on Titan-3B rockets. The SDS-1 satellites had similar orbits to the Air Force's Jumpseat ELINT satellites.
The SDS-2 is significantly more massive at 5150 pounds (2335 kg), with three separate communication dishes, including one for a K band downlink. Two dishes are 15 feet (4.5 meters) in diameter, while the third is 6.6 feet (2 m) in diameter. The solar arrays generate 1238 watts of power. It is believed that the Space Shuttle has been used to launch several satellites, possibly on missions STS-28, STS-38, and STS-53. Other launches have used the Titan-4 rocket.
Quasar is the rumored code name for the communications satellite.
A recent Quasar may have been launched into a high-apogee orbit from Cape Canaveral on August 31, 2004 by an Atlas 2AS rocket.
This text uses material from Wikipedia, licensed under CC BY-SA
