It is unwise to demand a yes/no answer to a question unless you are an expert in the field (or, of course, an attorney trying to trap a witness). Some questions just don't have a yes/no answer, and this is one of them. The answer depends on the type of altimeter. For the standard aircraft altimeter which works by measuring pressure it also depends on how you use it.
The barometer became used as an altimeter in early aircraft to measure height above the ground and has been refined to be in every aircraft today.
lower than the actual altitude above sea level.
Static pressure can be caalculated by simply measuring the height of the faucet from the highest fixture above this faucet and times the height by .434 for static pressure
Measure human height by the transitive property. Stand up against the wall and make a mark at your height. Then measure the distance from the floor to the mark. You are as tall as the mark is above the floor.
The aneroid measures elevation and air pressure has an airtight chamber that is sensetive to changes in the air pressures. Hope this helps.
An altimeter actually measure brometric (atmospheric) pressure, which converts to height above sea level
radio altimeter
In an aircraft an instrument called an altimeter shows this.
An altimeter is not a unit of distance - it is a device for measuring distances above ground.
YES. radio altimeter is programmed to read accurate with landing gear down i.e. height of the tyres above the ground. Therefore if the configuration is clean the altimeter will underread.
By measuring the atmospheric Pressure, using an instrument called an Altimeter. As you move higher and higher from sea level, the atmospheric pressure decreases, and the pressure of the air can be converted mathematically to height above sea level . An Altimeter has a dial which shows Metres above sea level. If the instrument is used to measure Atmospheric Pressure , for the purpose of weather forecasting, then the dial shows 'Bars' of pressure. A 'Bar' is equal to 14.7 Pounds per Square Inch of pressure, which is the air pressure at sea level. Sky diving parachutists use an altimeter attached to them , which they can watch as they descend. When their height above the ground is at a suitable height, they open their parachute. They do not just make a wild guess. They use their Altimeter which is quite a good idea. It prevents them from killing themselves !
An altimeter does not actually measure altitude directly, but rather just atmospheric pressure. So an altimeter is actually a barometer created for a specific purpose. See related link The altimeter measures the height above the ground and has a pointer which is adjustable depending in which air field you are taking off on. it measures the pressure of the air as you get higher off the ground the pressure reduces therefore it is able to determine your height above ground.
Altitude. Height. Depends on what you are measuring.
Radar altimeter gets altitude information by bouncing a radio wave off the surface of the Earth and determines the aircrafts altitude by measuring the length of time it takes for the signal to return. Barometric altimeters get altitude information by measuring the barometric air pressure outside the aircraft. Barometric pressure decreases as altitude increases. Radar altimeters will give altitude above ground level while barometric altimeters give altitude above sea level.
The pilot checked the altimeter to be sure the plane had reached the optimum altitude before the skydivers were allowed to jump. Most altimeters have to be set to local air pressure to correctly determine the plane's height above the ground.
The barometer became used as an altimeter in early aircraft to measure height above the ground and has been refined to be in every aircraft today.
The altimeter is basically a specialized pressure gauge. It measures the pressure of the column of air above it. As the altitude varies, the air column height varies, which registers on the altimeter. Since the air pressure also varies with changes in the barometric pressure, altimeters must have an adjustment to compensate for changes in local barometric pressure.