scholarly journals Calibrating Single-Ended Fiber-Optic Raman Spectra Distributed Temperature Sensing Data

Sensors ◽  
2011 ◽  
Vol 11 (11) ◽  
pp. 10859-10879 ◽  
Author(s):  
Mark B. Hausner ◽  
Francisco Suárez ◽  
Kenneth E. Glander ◽  
Nick van de Giesen ◽  
John S. Selker ◽  
...  
Keyword(s):  
Raman Spectra ◽  
Fiber Optic ◽  
Temperature Sensing ◽  
Distributed Temperature Sensing ◽  
Sensing Data

scholarly journals Double-Ended Calibration of Fiber-Optic Raman Spectra Distributed Temperature Sensing Data

Sensors ◽  
2012 ◽  
Vol 12 (5) ◽  
pp. 5471-5485 ◽  
Author(s):  
Nick van de Giesen ◽  
Susan C. Steele-Dunne ◽  
Jop Jansen ◽  
Olivier Hoes ◽  
Mark B. Hausner ◽  
...  
Keyword(s):  
Raman Spectra ◽  
Fiber Optic ◽  
Temperature Sensing ◽  
Distributed Temperature Sensing ◽  
Sensing Data

scholarly journals DTSGUI: A Python Program to Process and Visualize Fiber‐Optic Distributed Temperature Sensing Data

Ground Water ◽  
2020 ◽  
Author(s):  
Marian Domanski ◽  
Daven Quinn ◽  
Frederick D. Day‐Lewis ◽  
Martin A. Briggs ◽  
Dale Werkema ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Temperature Sensing ◽  
Distributed Temperature Sensing ◽  
Sensing Data

scholarly journals Identifying and Correcting Step Losses in Single-Ended Fiber-Optic Distributed Temperature Sensing Data

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Mark B. Hausner ◽  
Scott Kobs
Keyword(s):  
Raman Spectra ◽  
Optical Fibers ◽  
Fiber Optic ◽  
Spatial Scales ◽  
Laboratory Data ◽  
Temperature Sensing ◽  
Data Sets ◽  
Distributed Temperature Sensing ◽  
Cable Damage ◽  
Environmental Temperatures

Fiber-optic distributed temperature sensing (DTS) makes it possible to observe temperatures on spatial scales as fine as centimeters and at frequencies up to 1 Hz. Over the past decade, fiber-optic DTS instruments have increasingly been employed to monitor environmental temperatures, from oceans to atmospheric monitoring. Because of the nature of environmental deployments, optical fibers deployed for research purposes often encounter step losses in the Raman spectra signal. Whether these phenomena occur due to cable damage or impingements, sharp bends in the deployed cable, or connections and splices, the step losses are usually not adequately addressed by the calibration routines provided by instrument manufacturers and can be overlooked in postprocessing calibration routines as well. Here we provide a method to identify and correct for the effects of step losses in raw Raman spectra data. The utility of the correction is demonstrated with case studies, including synthetic and laboratory data sets.

scholarly journals Thermodynamics of a fast-moving Greenlandic outlet glacier revealed by fiber-optic distributed temperature sensing

2021 ◽  
Vol 7 (20) ◽  
pp. eabe7136
Author(s):  
Robert Law ◽  
Poul Christoffersen ◽  
Bryn Hubbard ◽  
Samuel H. Doyle ◽  
Thomas R. Chudley ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Basal Layer ◽  
Temperature Sensing ◽  
Distributed Temperature Sensing ◽  
Catchment Scale ◽  
Outlet Glacier ◽  
Coarse Spatial Resolution ◽  
High Vertical Resolution ◽  
Fast Motion ◽  
Strain Heating

Measurements of ice temperature provide crucial constraints on ice viscosity and the thermodynamic processes occurring within a glacier. However, such measurements are presently limited by a small number of relatively coarse-spatial-resolution borehole records, especially for ice sheets. Here, we advance our understanding of glacier thermodynamics with an exceptionally high-vertical-resolution (~0.65 m), distributed-fiber-optic temperature-sensing profile from a 1043-m borehole drilled to the base of Sermeq Kujalleq (Store Glacier), Greenland. We report substantial but isolated strain heating within interglacial-phase ice at 208 to 242 m depth together with strongly heterogeneous ice deformation in glacial-phase ice below 889 m. We also observe a high-strain interface between glacial- and interglacial-phase ice and a 73-m-thick temperate basal layer, interpreted as locally formed and important for the glacier’s fast motion. These findings demonstrate notable spatial heterogeneity, both vertically and at the catchment scale, in the conditions facilitating the fast motion of marine-terminating glaciers in Greenland.

Measuring Artificial Recharge with Fiber Optic Distributed Temperature Sensing

Ground Water ◽  
2012 ◽  
Vol 51 (5) ◽  
pp. 670-678 ◽  
Author(s):  
Matthew W. Becker ◽  
Brian Bauer ◽  
Adam Hutchinson
Keyword(s):  
Fiber Optic ◽  
Artificial Recharge ◽  
Temperature Sensing ◽  
Distributed Temperature Sensing
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