Day: August 5, 1961

Categories
Radio & Audio Television

The Emergency Broadcast System

  • August 5, 1963

Emergency Broadcast SystemsRadio and television stations across the United States begin mandatory participation in the national Emergency Broadcast System, a nationwide civil defense alert network replacing the CONELRAD system of the 1950s. Much like CONELRAD, EBS tests and activations initially require the rapid shutdown and reactivation of transmitters, at least until that practice is abolished in favor of a two-tone warning sound in the 1970s. Though the switch from CONELRAD to EBS is sparked by the 1962 Cuban Missile Crisis, the EBS will later become more closely associated with severe weather warnings.

Categories
Mariner Uncrewed Spaceflight

Mariner 7 at Mars

  • August 5, 1969

Mariner 7The unmanned NASA/JPL space probe Mariner 7 makes its closest flyby of planet Mars, coming as close as just over 2100 miles from the Martian surface. Having recently suffered an inexplicable but temporary loss of communications with Earth (later determined to be caused by a leaky on-board battery), Mariner 7’s flight plan is reprogrammed just days out from Mars based on some of the more interesting findings of its sister ship, Mariner 6. The success of the tandem flight to Mars convinces NASA to adopt a similar mission profile for the upcoming Mars ’71 missions, which will send two Mariner orbiters to take up permanent positions around Mars.

Categories
Crewed Spaceflight Mir Soyuz

Soyuz TM-26

  • August 5, 1997

Soyuz TM-26Russia launches Soyuz TM-26 on a mission to the Mir space station, which suffered numerous major malfunctions and damage during its previous crew’s stay. Aboard the Soyuz are specially selected cosmonauts Anatoly Solovyev and Pavel Vinogradov, who have trained on the ground to inspect and repair the damage to the station, though they are unable to find the hull damage to the now-abandoned Spektr module which threatened to cause total decompression of the station. They do manage to restore most of Mir’s solar power generating capability during their 197-day stay, returning to Earth in February 1998 with French spationaut Léopold Eyharts.

Categories
Juno Uncrewed Spaceflight

Juno to Jupiter!

  • August 5, 2011

JunoNASA launches the unmanned Juno space probe on its way to Jupiter, on a trajectory that will accelerate the vehicle through a series of maneuvers, including a gravity assist pass of Earth, en route to Jupiter. Once it arrives at the solar system’s largest planet, Juno will enter a polar orbit to monitor the planet’s clouds and magnetic field over a period of one year beginning in 2016. Juno is solar-powered, without the customary nuclear power source that has been a feature of all previous outer solar system missions. Since it will spend time within the heaviest area of Jupiter’s magnetosphere, Juno’s components are built into a hexagonal structure which acts as a heavy-duty Faraday cage to block out the radiation trapped within Jupiter’s magnetic field.