POSC Specifications
Version 3.0
Epicentre Standard Values
ref_gain_mode

ref_gain_mode

Standard Instance Values

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

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