synthetic aperture radar



Venus is a hostile world, with average temperatures of 870 degrees fahrenheit (or 465 degrees celsius) and the mostly carbon-dioxide atmosphere is 92 times heavier than what we experience here on earth.

The Soviet spacecraft Venera-9 made a successful Venus landing on October 22, 1975 and returned black and white images of the terrain. Venera-12 landed on Venus on December 21, 1978, and Venera-11 landed on December 25. All of the color panoramic cameras failed, due to atmospheric pressure.

The descent module of Venera-13 landed on Venus on March 1, 1982. Two optical-mechanical cameras repeatedly scanned 180° or 60° through clear and colored filters and at higher resolution than the Venera-9/10 system. Venera-14 arrived four days after Venera-13, and its descent module landed on March 5. It remained in contact with the flyby module for 57 minutes.

The twin orbiters, Venera-15 and Venera-16, carried out the first high resolution survey of the surface of Venus, using synthetic aperture radar and radar altimetry. Surveying took place from November 11 1983 to July 10 1984, covering the northern cap of the planet down to about 25° latitude.

Images of the Venera-9 lander, which survived only 53 minutes before succumbing to the heat and pressure of Venus’ atmosphere, can be seen »here.


Marking the second launch of 2016 for ULA, a Delta IV M+ (5,2) rocket launched NRO L-45 at 3:40 am PST February 10, 2016. This marked the second time Delta IV flew in its 5,2 configuration, which consisted of a 4 meter payload fairing and 2 GEM-60 Solid Rocket Motors.

The vehicle lofted the L-45 payload for the National Reconnaissance Office, which is known to be the fourth Topaz Future Imaging Architecture Radar Satellite. Topaz utilizes a synthetic aperture radar system, which can image Earth’s surface and immediate sub-surface areas through any weather condition, day or night.

NRO L-45 marked the second United Launch Alliance launch in less than 5 days, with GPS IIF-12 occurring February 5, and the 105th launch of the company overall. It was the 31st Delta IV flight, and 6th from Vandenberg Air Force Base.

anonymous asked:

Are there any scips that are libraries? I need this for research purposes

There SURE ARE! The best known one is SCP-1986 Imaginary Library.

Although the full extent of the tunnel is unknown, Interferometric Synthetic Aperture Radar (IfSAR) has established a minimum depth of 274,700km or nearly 1 light-second (expeditions have confirmed a depth of at least 4,441km). The conjecture has been advanced that the tunnel may be infinite.