MAGNETIC COMPUTER DUST FILTERS - MAGNETIC COMPUTER
Magnetic computer dust filters - Diy ir filter.
Magnetic Computer Dust Filters
- Capable of being attracted by or acquiring the properties of a magnet
- capable of being magnetized
- Having the properties of a magnet; exhibiting magnetism
- having the properties of a magnet; i.e. of attracting iron or steel; "the hard disk is covered with a thin coat of magnetic material"
- Relating to or involving magnetism
- of or relating to or caused by magnetism; "magnetic forces"
- An electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program
- (computing) computer science: the branch of engineering science that studies (with the aid of computers) computable processes and structures
- a machine for performing calculations automatically
- A person who makes calculations, esp. with a calculating machine
- calculator: an expert at calculation (or at operating calculating machines)
- A screen, plate, or layer of a substance that absorbs light or other radiation or selectively absorbs some of its components
- A device for suppressing electrical or sound waves of frequencies not required
- (filter) an electrical device that alters the frequency spectrum of signals passing through it
- A porous device for removing impurities or solid particles from a liquid or gas passed through it
- (filter) remove by passing through a filter; "filter out the impurities"
- (filter) device that removes something from whatever passes through it
- A fine powder
- Fine, dry powder consisting of tiny particles of earth or waste matter lying on the ground or on surfaces or carried in the air
- Any material in the form of tiny particles
- remove the dust from; "dust the cabinets"
- debris: the remains of something that has been destroyed or broken up
- fine powdery material such as dry earth or pollen that can be blown about in the air; "the furniture was covered with dust"
The Mars Pathfinder conducted different investigations on the Martian soil using three scientific instruments. The lander contained a stereoscopic camera with spatial filters on an expandable pole called Imager for Mars Pathfinder (IMP), and the Atmospheric Structure Instrument/Meteorology Package (ASI /MET) which acts as a Mars meteorological station, collecting data about pressure, temperature, and winds. The MET structure included three windsocks mounted at three heights on a pole, the topmost at about one meter (yard) and generally registered winds from the West.
The Sojourner rover had a Alpha Proton X-ray Spectrometer (APXS), which was used to analyze the components of the rocks and soil. The rover also had two black-and-white cameras and a color one. These instruments could investigate the geology of the Martian surface from just a few millimeters to many hundreds of meters, the geochemistry and evolutionary history of the rocks and surface, the magnetic and mechanical properties of the land, as well as the magnetic properties of the dust, atmosphere and the rotational and orbital dynamics of the planet.
The landing site was an ancient flood plain in Mars's northern hemisphere called "Ares Vallis" ("the valley of Ares," the ancient Greek equivalent of the ancient Roman deity Mars) and is among the rockiest parts of Mars. Scientists chose it because they found it to be a relatively safe surface to land on and one that contained a wide variety of rocks deposited during a catastrophic flood. After the landing, at 19°08?N 33°13?W? / ?19.13°N 33.22°W? / 19.13; -33.22Coordinates: 19°08?N 33°13?W? / ?19.13°N 33.22°W? / 19.13; -33.22, succeeded, the landing site received the name The Carl Sagan Memorial Station in honor of the late astronomer and leader in the field of robotic spacecraft missions.
Mars Pathfinder entered the Martian atmosphere and landed using an innovative system involving an entry capsule, a supersonic parachute, followed by solid rockets and large airbags to cushion the impact.
Mars Pathfinder directly entered Mars atmosphere in a retrograde direction from a hyperbolic trajectory at 6.1 km/s using an atmospheric entry aeroshell (capsule) that was derived from the original Viking Mars lander design. The aeroshell consisted of a back shell and a specially designed ablative heatshield to slow to 370 m/s (830 MPH) where a supersonic disk-gap-band parachute was inflated to slow its descent through the thin Martian atmosphere to 68 m/s (about 160 MPH). The lander's on-board computer used redundant on-board accelerometers to determine the timing of the parachute inflation. Twenty seconds later the heatshield was pyrotechnically released. Another twenty seconds later the lander was separated and lowered from the backshell on a 20 m bridle (tether). When the lander reached 1.6 km above the surface, a radar was used by the on-board computer to determine altitude and descent velocity. This information was used by the computer to determine the precise timing of the landing events that followed.
Once the lander was 355 m above the ground, airbags were inflated in less than a second using three catalytically cooled solid rocket motors that served as gas generators. The airbags were made of 4 inter-connected multi-layer vectran bags that surrounded the tetrahedron lander. They were designed and tested to accommodate grazing angle impacts as high as 28 m/s. However, as the airbags were designed for no more than about 15 m/s vertical impacts, three solid retrorockets were mounted above the lander in the backshell. These were fired at 98 m above the ground. The lander's on-board computer estimated the best time to fire the rockets and cut the bridle so that the lander velocity would be reduced to about 0 m/s between 15 and 25 m above the ground. After 2.3 seconds, while the rockets were still firing, the lander cut the bridle loose about 21.5 m above the ground and fell to the ground. The rockets flew up and away with the backshell and parachute (they have since been sighted by orbital images). The lander impacted at 14 m/s and limited the impact to only 18 G of deceleration. The first bounce was 15.7 m high and continued bouncing for at least 15 additional bounces (accelerometer data recording did not continue through all of the bounces).
The entire entry, descent and landing (EDL) process was completed in 4 minutes.
Once the lander stopped rolling, the airbags deflated and retracted toward the lander using four winches mounted on the lander "petals". Designed to right itself from any initial orientation, the lander happened to roll right side up onto its base petal. 74 minutes after landing, the petals were deployed with Sojourner rover and the solar panels attached on the inside.
The lander arrived at night at 2:56:55 Mars local solar time (16:56:55 UTC) on July 4, 1997. The lander had to wait until sunrise to send its first digital signals and images to Earth. The
i apologise for my amount of outtakes i have uploaded over the last week. i was uninspired and i was going to shoot today but it is raining:(
i liked the light and the little green spots around my shoulder, they reminded me of fairy dust.
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