Wikipedia
The standard acceleration due to gravity (or standard acceleration of free fall), sometimes abbreviated as standard gravity, usually denoted by or , is the nominal gravitational acceleration of an object in a vacuum near the surface of the Earth. It is defined by standard as , which is exactly (about , or ). This value was established by the 3rd CGPM (1901, CR 70) and used to define the standard weight of an object as the product of its mass and this nominal acceleration. The acceleration of a body near the surface of the Earth is due to the combined effects of gravity and centrifugal acceleration from rotation of the Earth (but which is small enough to be neglected for most purposes); the total (the apparent gravity) is about 0.5 percent greater at the poles than at the equator.
Although the symbol is sometimes used for standard gravity, (without a suffix) can also mean the local acceleration due to local gravity and centrifugal acceleration, which varies depending on one's position on Earth (see Earth's gravity). The symbol should not be confused with , the gravitational constant, or g, the symbol for gram. The is also used as a unit for any form of acceleration, with the value defined as above; see g-force.
The value of defined above is a nominal midrange value on Earth, originally based on the acceleration of a body in free fall at sea level at a geodetic latitude of 45°. Although the actual acceleration of free fall on Earth varies according to location, the above standard figure is always used for metrological purposes. In particular, it gives the conversion factor between newton and kilogram-force, two units of force.
Usage examples of "standard gravity".
It would be good to leave behind the painful chauvinism of Earth standard gravity and get back home to the normal gravity of Mars, he thought, and hurried on his way.
The iron harpoon was freezing to the touch, and his fingers had already gone numb from the cold, but he struggled against what felt like twice standard gravity.
The disk pulled us towards it at twenty-one gee, the acceleration of the ship pulled us away from it at twenty gee, and we sat there in the middle at a snug and comfortable standard gravity.
MacArthur accelerated away from New Chicago at one standard gravity.
It was at least six hundred meters down- down being created by the one-sixth standard gravity being generated by the singularities imprisoned at the base of the tree - and there were no railings.
The furthest-fallen ends of the columns - which must have toppled slowly but most impressively in our half-standard gravity - punched great long crater-like ditches out of the earth, creating long double embankments with bulbously rounded tips.
The planet has a very thin atmosphere, and only one-quarter standard gravity.
During the next five minutes the thrust dropped from a standard gravity to .
Fortunately, they'd all done well in null-grav training, and there were no embarrassing gaffes as, one-by-one, they swung themselves into Hexapuma's midships boat bay's one standard gravity.