POSC Specifications Version 3.0 |
Epicentre Standard Values ref_gain_mode |
identifier | description | source _reference | source | version | status |
---|---|---|---|---|---|
ref _version .identifier | |||||
automatic | The gain of each channel is controlled automatically and independently of other channels. | Dictionary of Exploration Geophysics | POSC | epicentre 2.1 | current |
ganged automatic | The gain of all channels is the same although automatically determined, the basis being one single channel or the average energy level of a number of channels. | Dictionary of Exploration Geophysics | POSC | epicentre 2.1 | current |
programmed | The gain as a function of record time is determined prior to the shot. | Dictionary of Exploration Geophysics | POSC | epicentre 2.1 | current |
binary | The gain is allowed to vary only by factors of two, but the time at which the gain changes is determined automatically; these times being recorded. | Dictionary of Exploration Geophysics | POSC | epicentre 2.1 | current |
quaternary | The gain is allowed to vary only by factors of four. | Dictionary of Exploration Geophysics | POSC | epicentre 2.1 | current |
instantaneous floating point | The gain is determined for each sample based on the amplitude of that channel without prejudice by earlier samples or the amplitude of other channels. | Dictionary of Exploration Geophysics | POSC | epicentre 2.1 | current |