.... trisponder experiment accuracy rms buoy long-distance range measurement system projector bearing interrogator antenna slant range transponder horizontal range receiver coordinate system algorithm transponder field computer OTe 4997 A High-Accuracy, Long-Distance Range Measurement System...

... the original acquisition of the data in an arbitrary s-t coordinate system, where s represents the slant range from the vehicle to a point on the bottom, normal to the vehicle track, while t represents time of day, and thus vehicle position along its track. Since the slant range from the vehicle to a bottom...

... long-baseline system long-baseline mode acoustic position reference system operator accuracy beacon application subsea system slant range calibration positioning long-baseline operation information operation OTC 3553 AN ACOUSTIC POSITION REFERENCE SYSTEM INTERGRATING LONG AND SHORT...

... spatial corrections for slant range and speed to give high resolution, plan view graphic images, of the seafloor. Automatic amplitude corrections are also applied such that the darkness of the image relates directly to the backscattering strength of the seafloor material. Multiple image strips from...

... this direction information and from knowledge of either the depth or slant range to the subsea unit. A variation of the short-baseline concept is the ultra short- baseline or phase-comparison system (Figure 1b). This system determines direction from a measurement of the relative phases of the acoustic signal...

... issued by the interrogation unit. The time delay between transmission of the interrogate pulse and receipt of the reply pulse by the vessel's transducer provides a measure of the slant ranges to each of the underwater transponders. When properly calibrated, these systems can provide precise navigation...

... slant range platform battery receiver transmitter upstream oil & gas command diver bunker ramo corp technology base engineer emergency propagation path sequence blowout condition well control equipment water column drilling equipment OFFSHORE TECHNOLOGY CONFERENCE 6200 North...

... to travels outward from P and is received at HI and HZ at times t 1 and t 2 , respectively. hydrophone equation pinger ship acoustic position measurement interrogator tracking transponder reservoir characterization slant range correction hydrophone array arrival time displacement...

.... Each satellite orbits the earth approximately every 108 minutes. The geometrical placement of the orbiting satellite allows an earth bound observer to cross directly under the satellite twice daily. upstream oil & gas channel receiver data slant range position fix reservoir...