101
© Springer International Publishing AG, part of Springer Nature 2018
J. E. Corredor, Coastal Ocean Observing,
https://doi.org/10.1007/978-3-319-78352-9_5
Chapter 5
Signal Conditioning, Data Telemetry,
Command Signaling and Platform Positioning
in Ocean Observing
Abstract Data telemetry is the transmission of data from remote observing
platforms. Transmission from control station to platform, an additional ability
afforded by two-way communication (Tx/Rx) systems, allows command signaling
for adjustment of mission parameters. Autonomous navigation requires the capability to receive navigational positioning data from satellite systems such as GPS
or from underwater acoustic beacons, or the use of onboard inertial navigation
systems. Data from distributed sensor networks is transmitted through space and
through the atmosphere via radio waves, through the water via acoustic means,
through cables as current pulses, or as optical pulses through fiber-optic waveguides. Since seawater is largely opaque to radio signals, submerged ocean observing applications relying on satellite and cellular network communications for
transmission must have alternate means of communication between the submerged
platform and a surface relay platform, or must periodically reach the surface for data
transmission. Data are transmitted via modulation of a carrier wave. Signal conditioning consists of amplification of the initial signal, signal filtering to minimize
electronic noise, digitization, and eventual carrier signal modulation in preparation
for transmission.
Keywords Signal conditioning · Analog to digital conversion · Carrier modulation
· Data telemetry · Command signaling · Platform positioning
5.1 Data Signal Conditioning for Ocean Observing
Most sensor signals, such as variations in electrical current, resistance, voltage, or
frequency arising as the primary response of an electronic transducer to physical
forcing, are within the analog realm where variations are normally smooth and
continuous.
The original version of this chapter was revised. A correction to this chapter can be found at
https://doi.org/10.1007/978-3-319-78352-9_9
© Springer International Publishing AG, part of Springer Nature 2018
J. E. Corredor, Coastal Ocean Observing,
https://doi.org/10.1007/978-3-319-78352-9_5
Chapter 5
Signal Conditioning, Data Telemetry,
Command Signaling and Platform Positioning
in Ocean Observing
Abstract Data telemetry is the transmission of data from remote observing
platforms. Transmission from control station to platform, an additional ability
afforded by two-way communication (Tx/Rx) systems, allows command signaling
for adjustment of mission parameters. Autonomous navigation requires the capability to receive navigational positioning data from satellite systems such as GPS
or from underwater acoustic beacons, or the use of onboard inertial navigation
systems. Data from distributed sensor networks is transmitted through space and
through the atmosphere via radio waves, through the water via acoustic means,
through cables as current pulses, or as optical pulses through fiber-optic waveguides. Since seawater is largely opaque to radio signals, submerged ocean observing applications relying on satellite and cellular network communications for
transmission must have alternate means of communication between the submerged
platform and a surface relay platform, or must periodically reach the surface for data
transmission. Data are transmitted via modulation of a carrier wave. Signal conditioning consists of amplification of the initial signal, signal filtering to minimize
electronic noise, digitization, and eventual carrier signal modulation in preparation
for transmission.
Keywords Signal conditioning · Analog to digital conversion · Carrier modulation
· Data telemetry · Command signaling · Platform positioning
5.1 Data Signal Conditioning for Ocean Observing
Most sensor signals, such as variations in electrical current, resistance, voltage, or
frequency arising as the primary response of an electronic transducer to physical
forcing, are within the analog realm where variations are normally smooth and
continuous.
The original version of this chapter was revised. A correction to this chapter can be found at
https://doi.org/10.1007/978-3-319-78352-9_9