At an altitude of about, Young was able to view the landing site in its entirety.

At 4000 m, raising the oxygen concentration level by 5 percent via an oxygen concentrator and an existing ventilation system provides an altitude equivalent of 3000 m, which is much more tolerable for the increasing number of low-landers who work in high altitude.

At this altitude and velocity, the vehicle has a kinetic energy of about 3 TJ and a potential energy of roughly 200 GJ.

At the altitude of 5 – 10 km the meteor broke into pieces.

At an altitude of approximately 50 km, the pressure is reduced to a few atmospheres, and the temperature would be between 40 – 100 ° C, depending on the altitude.

At, the air is at half the pressure of sea level, which means that the engine will produce less than half-power at this altitude.

At altitude, the main parachute was deployed from the Vostok spacecraft.

At high altitude, during winter, and in the far north and south, snow collects in ice caps, snow pack and glaciers.

At an altitude of 750 m ( 2, 460 ft ) the main thrusters began firing, slowing the fall until a height of 22 m ( 72 ft ) was reached.

At an altitude of, Kittinger opened his main chute and landed safely in the New Mexico desert.

At the end of the second day they reached the crest of the NE ridge at an altitude of about 6500 m. During the following day and a half they climbed along the NE Ridge and, utterly exhausted, reached the summit.

At liftoff the engine typically burns both fuels, gradually changing the mixture over altitude in order to keep the exhaust plume " tuned " ( a strategy similar in concept to the plug nozzle but using a normal bell ), eventually switching entirely to LH2 once the kerosene is burned off.

At 12: 07 a. m., a security camera at the high altitude W. L. Eccles Observatory ( 9600 ft above sea level ) recorded a movie of the passage of the object to the north.

At 1, 052 meters altitude, the highest elevation in Bangladesh is found at Mowdok Mual, in the southeastern part of the hills.

At an altitude between to ( depending on operating frequency ), the signal is partially absorbed in a small volume several tens of kilometers in diameter and a few meters thick over the IRI.

At higher altitude a MACH-meter is used instead, to prevent the aircraft from overspeed.

At an altitude of approximately, the SAA spans from-50 ° to 0 ° geographic latitude and from-90 ° to + 40 ° longitude.

At an altitude of about 370 km ( 230 mi ) the first stage separated from the second stage.

At 6 km altitude, traveling at about 250 m / s, the 16 m diameter lander parachutes deployed.

At 1. 5 km altitude, retrorockets on the lander itself were ignited and, 40 seconds later at about 2. 4 m / s, the lander arrived on Mars with a relatively light jolt.

At an average of 654 m of altitude, on the southern part of the Meseta Central and occupying some 88 km² ; the city was for a long time encapsuled between the hills and the river Henares to the south and east by the Madrid-Barcelona railway on the north and west.

At an altitude of 1, 605 metres ( 5, 260 ft ) above sea level, Quetta Airport is the second highest airport in Pakistan.

At an altitude of 750 meters the main thrusters began firing, slowing the fall until a height of 22 meters was reached.

At 265 hours and 37 minutes into the mission, at a velocity of about, Apollo 16 began atmospheric reentry.

At a pressure of 55 GPa ( roughly 540 times atmospheric pressure ) bromine converts to a metal.

At that temperature, the vapor pressure of the liquid becomes sufficient to overcome atmospheric pressure and allow bubbles of vapor to form inside the bulk of the liquid.

At higher elevations, where the atmospheric pressure is much lower, the boiling point is also lower.

At 25 ° C and atmospheric pressure, one liter of water dissolves 3. 26 g or 1. 125 L of gaseous chlorine.

At the bottom of the trench, where the plates meet, the water column above exerts a pressure of, over one thousand times the standard atmospheric pressure at sea level.

At atmospheric pressure molecular nitrogen condenses ( liquefies ) at 77 K (− 195. 79 ° C ) and freezes at 63 K (− 210. 01 ° C ) into the beta hexagonal close-packed crystal allotropic form.

At 100 ° C and atmospheric pressure, equilibrium is not reached until the air is 100 % water.

At atmospheric pressure the mean free path of air is about 70 nm.

At the other end of the scale, helium does not freeze at all at normal pressure, even at temperatures very close to absolute zero ; pressures over 20 times normal atmospheric pressure are necessary.

At high latitudes ( near the Earth's poles ), they are very low, making communication difficult or impossible due to factors such as atmospheric refraction, Earth's thermal emission, line-of-sight obstructions, and signal reflections from the ground or nearby structures.

At a pressure of above atmospheric pressure, water in a pressure cooker can reach a temperature of up to.

At high elevations, the Earth's atmosphere is thinner thereby minimizing the effects of atmospheric turbulence and resulting in better astronomical " seeing ".

At night, the same receiver may pick up signals as far away as 1110 KFAB in Nebraska reliably, depending on atmospheric noise and man-made interference.

At the time of its upgrade, the storm was located in an area of higher than normal atmospheric pressure, although conditions favored further development.

At atmospheric pressure, liquid nitrogen boils at and is a cryogenic fluid which can cause rapid freezing on contact with living tissue.

At the short wavelength end the cut-off is determined by the atmosphere ; specifically atmospheric seeing.

At the time, Canada only possessed upper atmospheric launch capabilities, and therefore Alouette 1 was sent aloft by the American National Aeronautics and Space Administration ( NASA ) from Vandenberg AFB in California.

At sea level, an ambient temperature of 70 ° F ( 21 ° C ), and under normal atmospheric conditions, the speed of sound is approximately per second ( 347 m / s ).

At present, the highest temperature superconducting materials are the cuprates, which have demonstrated superconductivity at atmospheric pressure at temperatures as high as-135 ° C ( 138 K ).

At 1200 UTC, Agnes reached its minimum atmospheric pressure of, as reported by a reconnaissance aircraft.

At liquid level in the top reservoir, the liquid is under atmospheric pressure, and as one goes up the siphon, the hydrostatic pressure decreases ( under vertical pressure variation ), since the weight of atmospheric pressure pushing the water up is counterbalanced by the column of water in the siphon pushing down ( until one reaches the maximum height of a barometer / siphon, at which point the liquid cannot be pushed higher ) – the hydrostatic pressure at the top of the tube is then lower than atmospheric pressure by an amount proportional to the height of the tube.