2010-047-FA_hypack - Raw HYPACK navigation logs (text) collected by the U.S. Geological Survey in Vineyard Sound and Buzzards Bay, MA, July 2010

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Frequently anticipated questions:

What does this data set describe?

Title:
2010-047-FA_hypack - Raw HYPACK navigation logs (text) collected by the U.S. Geological Survey in Vineyard Sound and Buzzards Bay, MA, July 2010
Abstract:
These data were collected under a cooperative agreement between the Massachusetts Office of Coastal Zone Management (CZM) and the U.S. Geological Survey (USGS), Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center (WHCMSC). Initiated in 2003, the primary objective of this program is to develop regional geologic framework information for the management of coastal and marine resources. Accurate data and maps of seafloor geology are important first steps toward protecting fish habitat, delineating marine resources, and assessing environmental changes due to natural or human impacts. The project is focused on the inshore waters of coastal Massachusetts, primarily in water depths of 2-30 meters. Data collected for the mapping cooperative have been released in a series of USGS Open-File Reports (<http://woodshole.er.usgs.gov/project-pages/coastal_mass/html/current_map.html>). The data collected in this study area are located in both Buzzards Bay and Vineyard Sound and are primarily in the shallow water areas around the eastern Elizabeth Islands and Martha's Vineyard, Massachusetts. The data include high resolution bathymetry, acoustic-backscatter intensity, sound velocity in water, seismic-reflection profiles, and navigation data. These data were collected during several cruises between 2007 and 2011 onboard the R/V Rafael using the following equipment: an SEA Ltd SwathPlus interferometric sonar (234 kHz), Klein 3000 dual frequency sidescan sonar, a boomer source and Geometrics 8-channel GeoEel streamer, a Knudsen 3200 subbottom profiling system, and 4 GPS antennae. More information about the cruises conducted as part of the project: Geologic Mapping of the Seafloor Offshore of Massachusetts can be found on the Woods Hole Coastal and Marine Science Center Field Activity webpages: <http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2011-013-FA> <http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2009-068-FA> <http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2007-039-FA><http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2010-100-FA><http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2010-047-FA>
  1. How should this data set be cited?

    U.S. Geological Survey, 2013, 2010-047-FA_hypack - Raw HYPACK navigation logs (text) collected by the U.S. Geological Survey in Vineyard Sound and Buzzards Bay, MA, July 2010: Open-File Report 2013-1020, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts.

    Online Links:

    This is part of the following larger work.

    Pendleton, Elizabeth A., Andrews, Brian D., Danforth, William W., and Foster, David S., 2013, High-Resolution Geophysical Data From Sand Shoals of Vineyard Sound and the Sea Floor Surrounding the Eastern Elizabeth Islands, Massachusetts: Open-File Report 2013-1020, U.S. Geological Survey, Reston, VA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -70.882
    East_Bounding_Coordinate: -70.605
    North_Bounding_Coordinate: 41.680
    South_Bounding_Coordinate: 41.361

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Beginning_Date: 07-Jul-2010
    Ending_Date: 19-Jul-2010
    Currentness_Reference:
    No data were recorded on 20100710 to 20100713 due to weather conditions

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: tabular digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a Point data set. It contains the following vector data types (SDTS terminology):

      • Entity point (8751)

    2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.00001. Longitudes are given to the nearest 0.00001. Latitude and longitude values are specified in Degrees, minutes, and decimal seconds.

      The horizontal datum used is D_WGS_1984.
      The ellipsoid used is WGS_1984.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257224.

  7. How does the data set describe geographic features?

    2010-047-FA_Boomer_Hypack
    (Source: U.S. Geological Survey)

    Entity_and_Attribute_Overview:
    The times recorded in the navigation file are in UTC. File 000_1146.193 is anomalous and doesn't always conform to the following definitions. Keywords and the information they provide are as follows: FTP: The first record located at the top of the header used to identify the file format. VER: HYPACK version number. INF: General survey information filled in by the data technician. On this cruise, none of that information was filled in. The three numbers at the end refer to initial tide correction at start-of-line, initial draft correction at start-of-line and sound velocity. FIL: Raw format file. ELL: Ellipsoid information. The name of the ellipsoid followed by the semi-major axis in meters and the flattening ratio. PRO: Project information record where TME indicates Transverse Mercator and the central meridian of -69 indicates UTM, zone 19. DTM: Datum transformation record. GEO: Geoid Model File. Blank if not present. GEO <geo_file> <h_corr> where 'h_corr' is orthometric height correction in meters. HVU: Horizontal and Vertical Units (meters) TND: Survey time and date in UTC. DEV 0: Indicates that the lines with device designation 0 are lines from a Communications Systems International (CSI), Inc. LGBX Pro (DGPS) OFF 0: device offsets for device 0. Format of the value is OFF dn n1 n2 n3 n4 n5 n6 n7 where dn=device number; n1=starboard, port offsets where positive is starboard; n2=forward, aft offset where positive is forward; n3=height (antenna) or depth (transducer draft) offset - always positive; n4=yaw rotation angle where positive for clockwise rotation; n5=roll rotation angle where port side up is positive; n6=pitch rotation angle where bow up is positive; n7=device latency in seconds. No offset for device 0 during this data collection. DEV 1: Indicates that the lines with device designation 1 are lines of RTK data acquired with the Novatel DLV3 (dual frequency) receiver. OFF 1: device offsets, where antenna height is 4.47 meters DEV 2: Indicates that the lines with device designation 3 are lines of DGPS data acquired with an Ashtech Z-extreme (dual frequency) receiver. OFF 2: device offsets, where antenna height is 4.47 meters DEV 3: Indicates that the lines with device designation 2 are lines of echosounder data acquired with a Garmin 5312 (single frequency) receiver. OFF 3: device offsets (none used during this data collection, used for boat steering only) DEV 4: Disabled Octopus F180. LIN: planned line data follows in the format "LIN nw" where nw=number of waypoints. PTS: planned line waypoints in the format "PTS x y" where x=waypoint easting; y=waypoint northing. ***In this case, easting and northing UTM zone 19N, meters. LBP: planned line begin point in the format "LBP x y" where x=x grid position; y=y grid position. In this case ***easting and northing, UTM Zone 19N, meters. LNN X: planned line name where X is the line name EOL: end of planned line EOH: end of header
    The remaining elements have similar information in the first 3 columns. The first column will indicate the data type, the second column will indicate the device that recorded the information (***0 for CSI LBGX Pro) and the third column is the time tag (seconds past midnight) that is also sometimes referred to as the latency. The remaining information on each line is specific to the data type.
    POS: Position of the ship - in this case the antenna location - in the format "POS dn t x y" where dn=device number; t=time tag (seconds past midnight); x=easting; y=northing. On this cruise these values are in UTM, Zone 19, WGS 84. QUA: Position quality information in the format "QUA dn t n m h sat mode" where dn=device number; t=time tag (seconds past midnight); n=number of values to follow; m = 10 minus HDOP (horizontal dilution of precision); h=HDOP; sat=number of satellites; mode=GPS mode (NMEA 0183 standard values) where 2=Differential GPS fix. RAW: Position information in the format "RAW dn t n lat long alt utc" where dn=device number; t=time tag (seconds past midnight); n=number of values to follow; lat=raw latitude X 100; long=raw longitude X 100; alt=antenna altitude above ellipsoid (meters); utc=GPS time in the format HHMM. EC1: Echo Sounding (single frequency Garmin 5312) in the format "EC1 dn t rd" where dn=device number; t=time tag (seconds past midnight); rd=raw depth in meters. MSG: Message string in the format "MSG dn t message" where dn=device number; t=time tag (seconds past midnight); message is the message sent from the device. On this cruise, three different messages were sent from the DGPS: $GPGGA, $GPGLL and $SDDBT. These will be defined later. FIX: events marked manually by the user in the format "FIX dn t event_number" where dn=device number (typically 99 as there is no device for manual events); t=time tag (seconds past midnight); event_number=event number such as 1,2,3,4. The NMEA strings present in the HYPACK file are the $GPGGA, $GPGLL, $SDDPT and $SDBPT. These are defined as follows.
    $GPGGA is GPS fix data in the format "$GPGGA, t, lat, lath, long, longh, q, sat, h, a, M, alt, M, t2, refcheck" where t=time in UTC in the format hhmmss.ss; lat=latitude in the format ddmm.mmmmmm; lath= N or S indicating the latitude hemisphere; long=longitude in the format dddmm.mmmmmm; longh=E or W indicating the longitude hemisphere; q=fix quality where 2 is a DGPS fix; sat=number of satellites; h=Horizontal Dilution of Precision (HDOP); a=Antenna altitude above mean sea level (geoid); M= units of antenna altitude in meters; alt=height of geoid above WGS 84 ellipsoid; M=units of geoidal height in meters; t2=time since last DGPS update; refcheck=DGPS reference station id and the checksum. Example: $GPGGA,180707,3835.9291,N,07509.0955,W,1,10,1.18,-6,M,,,,*0A UTC Time = 180707 Latitude = 3835.9291 N Longitude = 07509.0955 W Fix Quality = 1 Number of satellites = 10 HDOP = 1.18 relative accuracy of horizontal position Altitude = -6 meters above mean sea level Height of geoid above WGS 84 ellipsoid = not recorded Time since last update = not recorded Checksum = *0A.
    $SDDBT is water depth below the transducer in the format "$SDDBT, depth, units (f=feet), depth, units (m=meters), depth, units (F=fathoms), *checksum" Example: $SDDBT,5.2,f,1.6,M,0.8,F*0E Depth in feet = 5.2 Depth in meters = 1.6 Depth in fathoms = 0.8 Checksum = *0E The definitions of the HYPACK strings were acquired from the HYPACK software manual available from: <http://www.hypack.com/>. The definitions of the NMEA strings were obtained from: <http://home.mira.net/~gnb/gps/nmea.html> and the SDDBT definition was obtained from: <http://www.eye4software.com/products/gpstoolkit/nmea/>
    Entity_and_Attribute_Detail_Citation:
    The definitions of the HYPACK strings were acquired from the HYPACK software manual available from: <http://www.hypack.com/>. The definitions of the NMEA strings were obtained from: <http://home.mira.net/~gnb/gps/nmea.html> and <http://www.gpsinformation.org/dale/nmea.htm#nmea>.

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

  3. To whom should users address questions about the data?

    David S. Foster
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    508-548-8700 x2271 (voice)
    508-457-2310 (FAX)
    dfoster@usgs.gov

Why was the data set created?

These raw HYPACK navigation data are included as an archive documenting the survey area and the instrumentation used to manage the ship's navigation.These navigation data are useful for supplementing the seismic navigation where those data are absent or unreliable.

How was the data set created?

  1. From what previous works were the data drawn?

    USGS (source 1 of 1)
    U.S. Geological Survey.

    Type_of_Source_Media: disc
    Source_Contribution:
    Raw navigation data were saved in HYPACK format. File name convention is LLL_TTTT.JJJ, where LLL is the HYPACK line number, TTTT is the 24 hour time for the beginning of the file, and JJJ is the Julian Day of data collection. Times were recorded in UTC (Coordinate Universal Time).

  2. How were the data generated, processed, and modified?

    Date: 2010 (process 1 of 1)
    The raw HYPACK navigation files (HYPACK VER 10.0.5.31) were transferred from the logging computer. The files are separated by day of collection. The format of the filenames are LLL_TTTT.RAW where LLL is the linenumber and TTTT is the start time (UTC) of data collection in the format HHMM.

    Person who carried out this activity:

    Elizabeth A. Pendleton
    U.S. Geological Survey
    Geologist
    U.S. Geological Survey
    Woods Hole, MA 02543-1598
    USA

    (508)-548-8700 x2259 (voice)
    (508)-457-2310 (FAX)
    ependleton@usgs.gov

  3. What similar or related data should the user be aware of?

    Andrews, B.D., Ackerman, S.D., Baldwin, W.E., Foster, D.S., and Schwab, W.C., 2013, High-Resolution Geophysical Data From the Inner Continental Shelf at Vineyard Sound, Massachusetts: Open-File Report 2012-1006, U.S. Geological Survey, Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts.

    Online Links:

    Ackerman, S.D., Andrews, B.D., Foster, D.S., Baldwin, W.E., and Schwab, W.C., 2013, High-Resolution Geophysical Data from the Inner Continental Shelf: Buzzards Bay, Massachusetts: Open-File Report 2012-1002, U.S. Geological Survey, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    Pendleton, E.A., Twichell, D.C., Foster, D.S., Worley, C.R., Irwin, B.J., and Danforth, W.W., 2012, High-Resolution Geophysical Data From the Sea Floor Surrounding the Western Elizabeth Islands, Massachusetts: Open-File Report 2011-1184, U.S. Geological Survey, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    Turecek, A.M., Danforth, W.W., Baldwin, W.E., and Barnhardt, W.A., 2012, High-Resolution Geophysical Data Collected Within Red Brook Harbor, Buzzards Bay, Massachusetts, in 2009: Open-File Report 2010-1091, U.S. Geological Survey, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

  2. How accurate are the geographic locations?

    Positions of the ship (HYPACK line nav.) and the multichannel seismic system were determined using a Communications Systems International (CSI), Inc. LGBX Pro differential global positioning system (DGPS) antenna mounted above the cabin on the R/V Rafael. A Garmin 5312 was used to drive the boat and monitor water depths. Additionally, an Ashtech Z-Extreme was also used to record positions to HYPACK, but these data were not logged to any instrument. All DGPS data are assumed to be accurate to within + or - 1 to 2 meters.

  3. How accurate are the heights or depths?

    Depth values were collected with a Garmin 5312 single frequency DGPS, which has an assumed vertical accuracy of 0.25 meters.

  4. Where are the gaps in the data? What is missing?

    These files represent all the HYPACK navigation recorded during USGS Field Activity 2010-047-FA. No data were recorded for Julian days 195 to 197 due to weather conditions. The GPS data recorded to HYPACK include the following receivers: a Novatel DLV3 (RTK), Communications Systems International (CSI), Inc. LGBX Pro (DGPS), a Garmin 5312 (echosounder for boat navigation), and an Ashtech Z-extreme (DGPS). Only the data from the LGBX Pro (DGPS) were logged on the seismic acquisition system and used in post processing.

  5. How consistent are the relationships among the observations, including topology?

    These are the original files recorded by the HYPACK navigation software. No additional checks or corrections have been made to these files.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: none
Use_Constraints:
Not to be used for navigation. 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.

  1. Who distributes the data set? (Distributor 1 of 1)

    Elizabeth A. Pendleton
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    508-548-8700 x2259 (voice)
    508-457-2310 (FAX)
    dfoster@usgs.gov

  2. What's the catalog number I need to order this data set?

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    Not to be used for navigation. Neither 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.

  4. How can I download or order the data?

  5. What hardware or software do I need in order to use the data set?

    These data can be viewed with any text editing software.

Who wrote the metadata?

Dates:
Last modified: 09-Apr-2013
Metadata author:
David S. Foster
U.S. Geological Survey
Geologist
384 Woods Hole Road
Woods Hole, MA 02543-1598
USA

508-548-8700 x2271 (voice)
508-457-2310 (FAX)
dfoster@usgs.gov

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

Generated by mp version 2.9.21 on Wed Sep 25 11:47:30 2013