{739BF44B-C952-4C6C-9E2D-FEB7934FFD81}2009062612050200FALSE20100325125737002010032512575200Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.6.1500enIn order to test hypotheses about groundwater flow under and into Chesapeake Bay, geophysical surveys were conducted by U.S. Geological Survey (USGS) scientists on Chesapeake Bay and the Potomac River Estuary in September 2006. Chesapeake Bay resource managers are concerned about nutrients that are entering the estuary via submarine groundwater discharge, which are contributing to eutrophication. The USGS has performed many related studies in recent years to provide managers with information necessary to make informed decisions about this issue. The research carried out as part of the study described here was designed to help refine nutrient budgets for Chesapeake Bay by characterizing submarine groundwater flow and discharge of groundwater beneath part of the mainstem and a major tributary, the Potomac River Estuary. To provide the digital seismic-reflection profile data in SEG-Y format which provides information about the sub-surface geology in the survey area as well as being able to be used in conjunction with the continuous resistivity profile (CRP) data.There are three online linkages. One links to the folder containing all the SEG-Y data files. The second linkage points to the WinZip file of the FGDC metadata for these SEG-Y data files. The third link is to the data catalog page which in turn has links to all of these files.John F. Bratton2010SEG-Y Formatted Seismic-Reflection Profile Data Collected in the Potomac River/Chesapeake Bay from Sept. 6, 2006 to Sept. 8, 2006seismic_segy.txtDavid S. FosterVeeAnn A. Crosshttps://pubs.usgs.gov/of/2009/1151/data/seismics/segy/https://pubs.usgs.gov/of/2009/1151/data/seismics/segy_meta.zipContinuous Resistivity Profiling and Seismic-Reflection Data Collected in 2006 from the Potomac River Estuary, Virginia and MarylandVeeAnn A. CrossDavid S. FosterJohn F. Bratton2010Open-File Report2009-1151Woods Hole Coastal and Marine Science Center, Woods Hole, MAU.S. Geological Survey, Coastal and Marine Geology Programhttps://pubs.usgs.gov/of/2009/1151/Open-File Report 2009-1151 Woods Hole Coastal and Marine Science Center, Woods Hole, MA U.S. Geological Survey, Coastal and Marine Geology Program https://pubs.usgs.gov/of/2009/1151/html/catalog.htmlground condition2006090620060908None planned-76.856667-76.31024938.29566537.946077GeneralU.S. Geological SurveyUSGSCoastal and Marine Geology ProgramCMGPWoods Hole Coastal and Marine Science Center WHCMSCField Activity Serial Number 06018Info Bank ID K-1-06-CH navigationR/V KerhinLowrance GPS Differential GPSseismic-reflection profileSEG-Ylocationoceans inlandWaters oceans and estuaries oceans and coastal ISO 19115 Topic Category geoscientificInformationNorth America North Atlantic United States VirginiaPotomac River Estuary Chesapeake Bay Dennis Point Marina Solomons, Maryland MarylandGeneral Patuxent River None.The public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset.
Filtered filePaul Henkart2006SIOSEISdocumentLaJolla, CAScripps Institution of Oceanography, University of California - San Diegohttp://sioseis.ucsd.edu/Michael W. NorrisAlan K. Faichney2002SEG Y rev1 Data Exchange FormatdocumentTulsa, OKSociety of Exploration Geophysicistshttp://www.seg.org/SEGportalWEBproject/prod/SEG-Publications/Pub-Technical-Standards/Documents/seg_y_rev1.pdfDavid S. FosterU.S. Geological SurveyGeologistmailing and physical addressWoods Hole Coastal and Marine Science Center384 Woods Hole Rd.Woods HoleMA02543-1598(508) 548-8700 x2271(508) 457-2310dfoster@usgs.govMicrosoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.6.1500seismic_segy.txtenFGDC Content Standards for Digital Geospatial MetadataFGDC-STD-001-1998local timeVeeAnn A. CrossU.S. Geological SurveyMarine Geologistmailing and physical addressWoods Hole Coastal and Marine Science Center384 Woods Hole Rd.Woods HoleMA02543-1598(508) 548-8700 x2251(508) 457-2310vatnipp@usgs.gov20100325http://www.esri.com/metadata/esriprof80.htmlESRI Metadata ProfileISO 19115 Geographic Information - MetadataDIS_ESRI1.0datasetDownloadable DataNeither the U.S. government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
SEG-YvariousDVD-ROM4.75GBytesUDFhttps://pubs.usgs.gov/of/2009/1151/data/seismics/segy/http:/pubs.usgs.gov/of/2009/1151/data/seismics/segy_meta.ziphttps://pubs.usgs.gov/of/2009/1151/html/catalog.htmlNone.John F. BrattonU.S. Geological Surveymailing and physical addressWoods Hole Coastal and Marine Science Center384 Woods Hole Rd.Woods HoleMA02543-1598(508) 548-8700 x2254(508) 457-2310jbratton@usgs.govThe data are available in the SEG-Y format. The user must have software capable of reading this format. Availability online links to a folder containing all the SEG-Y files, so a reasonably fast Internet connection will be necessary to download the files. The online linkage is to the folder containing the SEG-Y data. The maximum individual file is 164 MB. The WinZip file provides the FGDC metadata.002Filtered file20100325KEB files were converted to match-filtered standard SEG-Y using KEL's PostSurvey version 1.56 software.2006David S. FosterU.S. Geological SurveyGeologistmailing and physical addressWoods Hole Coastal and Marine Science Center384 Woods Hole Rd.Woods HoleMA02543-1598(508) 548-8700 x2271(508) 457-2310dfoster@usgs.govThe seismic acquisition system used on this cruise was a Knudsen Engineering Limited (KEL) 1600 USB system. The system has up to 1.2 kW power and is tuned to work with two Massa 3.5 kHz transducers. The transducers were mounted on an over-the-side mount on the port side of the ship. The transducer draft was 0.7 m below the water surface. This draft offset was not included in the data acquisition. The seismic data acquisition software was SounderSuite-USB Beta. This system failed to acquire navigation data from the DGPS NEMA string on the first two days (Julian day 149 and 150). The software was also not able to record data in SEG-Y standard format. KEL KEB format files were logged to disk. In addition, KEA ASCII files with shot (ping) numbers and times were saved to disk. Shot-point navigation was also absent in the KEA files on Julian days 149 and 150. On Julian day 151 a patched version of SounderSuite was received and installed. This version recorded navigation in the KEB and KEA files. SEG-Y recording was still not an option. A time server was used to synchronize the DGPS time on the KEL and HYPACK navigation systems. This was important as KEL SounderSuite records system time. Data were acquired at a 20 micro-second sample interval, 2048 samples for a 40 ms record length. Fire-rate was 0.20 seconds (or 5 shots per second). The KEL recording software was set up to automatically switch files at shot 20,000. Line 5 switched from file 0005_2006_249_2014_002.keb after shot 13509 to a new file (0005_2006_249_2014_003.keb) while changing display parameters, due to a bug in the acquisition software.All KEB, KEA, and SEG-Y files were transferred to an external hard drive and transferred to a Mac OSX PowerBook for further processing. KEL match-filtered SEG-Y files were read and converted to the analytic form and then converted to instantaneous amplitude (envelope) SEG-Y using SIOSEIS 2006 seismic processing software. All SEG-Y output files were named the same as the original SEG-Y files, but placed in a separate folder.2006David S. FosterU.S. Geological SurveyGeologistmailing and physical addressWoods Hole Coastal and Marine Science Center384 Woods Hole Rd.Woods HoleMA02543-1598(508) 548-8700 x2271(508) 457-2310dfoster@usgs.govThe portion of line 5 that was split into two parts was renamed to coincide with the shot point navigation and tracklines shapefiles. This was necessary so that the order of the files reflects the direction of ship travel. Originally, based on the order of ship travel, the parts were part 2, part 1, part 4. Simply renaming part 1 to part 3 put the files in the proper order.0005_2006_249_2014_001.sgy20090005_2006_249_2014_003.sgyVeeAnn A. CrossU.S. Geological SurveyMarine Geologistmailing and physical addressWoods Hole Coastal and Marine Science Center384 Woods Hole Rd.Woods HoleMA02543-1598(508) 548-8700 x2251(508) 457-2310vatnipp@usgs.govA differential global positioning system (DGPS) was used for the seismic-reflection data. This system was an Ashtech DGPS2 with the navigation being recorded by HYPACK navigation software. The offset from the seismic transducer to the DGPS antenna was 2 meters. This offset was not entered into the software.Although bathymetry was not recorded directly, bathymetry can be derived by tracing the seafloor reflector in the seismic-reflection profiles. The seismic transducers were mounted on an over the side mount on the port side of the ship. The transducer draft was 0.7 m below the water surface. The draft offset was not included in the data acquisition.A SEG-Y format data file is available for every seismic-reflection profile line collected on this cruise.