Alicia F. Balster-Gee
Wayne E. Baldwin
Patrick E. Hart
20220920
R/V Parke Snavely (source vessel) navigation and survey geometry from USGS field activity 2021-619-FA collected in April of 2021 offshore Santa Cruz, CA
comma-delimited text
data release
DOI:10.5066/P9EHITBI
Pacific Coastal and Marine Science Center, Santa Cruz, California
U.S. Geological Survey
https://doi.org/10.5066/P9EHITBI
Alicia F. Balster-Gee
Wayne E. Baldwin
Patrick E. Hart
2022
Calibrated marine sparker source amplitude decay versus offset offshore Santa Cruz, California
data release
DOI:10.5066/P9EHITBI
Pacific Coastal and Marine Science Center, Santa Cruz, CA
U.S. Geological Survey
https://doi.org/10.5066/P9EHITBI
Navigation data were recorded for the R/V Parke Snavely (RVPS; source vessel) during USGS field activity 2021-619-FA in April of 2021 off the coast of Santa Cruz, California. Data were collected as the RVPS towed a marine sparker sound source along seven depth site transects in water depths ranging between 25 and 600 meters. The R/V San Lorenzo (RVSL; receive vessel) maintained a nearly stationary position at the midpoint along the seven depth site transects and recorded sound with a calibrated hydrophone. Navigation data and survey geometry information are presented in csv format as well as a trackline shapefile.
This two-vessel survey was designed to quantify the decay of sound emitted from the SIG ELP790 minisparker (powered at 700 joules) and from the Applied Acoustics Delta Sparker (powered at 1.0 and 2.4 kilojoules) as a function of distance during marine geophysical surveys. Seven transect sites were surveyed at five different water depths (25, 50, 100, 200, and 600 meters) to compare the effects of water depth on peak sound level. The source vessel (RVPS) towed the sparker sound source as well as a calibrated hydrophone (TC4034) to record the near-field outgoing signal along the transects. The receive vessel (RVSL) maintained a nearly stationary position at the midpoint of each transect and continuously recorded sound with a calibrated hydrophone (CR3101 or CR3102) at depths between 10 and 20 meters, depending on deployed cable length.
Additional information about the field activity from which these data were derived is available online at:
https://cmgds.marine.usgs.gov/fan_info.php?fan=2021-619-FA
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in Esri format, this metadata file may include some Esri-specific terminology.
20210419
20210428
ground condition at time data were collected
None planned
-122.47431993
-121.81507587
37.09648707
36.72920243
USGS Metadata Identifier
USGS:d8bfecac-2a31-49fc-8855-3ba9332be8f6
ISO 19115 Topic Category
oceans
geoscientificInformation
location
Data Categories for Marine Planning
Substrate
USGS Thesaurus
marine geophysics
sub-bottom profiling
geospatial datasets
Marine Realms Information Bank (MRIB) keywords
seismic reflection profiling
seismic methods
Global Positioning System (GPS) observations
None
U.S. Geological Survey
USGS
Coastal and Marine Hazards and Resources Program
CMHRP
Pacific Coastal and Marine Science Center
PCMSC
Woods Hole Coastal and Marine Science Center
WHCMSC
Geographic Names Information System (GNIS)
Pacific Ocean
State of California
Monterey Bay
Santa Cruz
NGA GEOnet Names Server (GNS)
Monterey Canyon
Soquel Canyon
None
USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator of the dataset and in products derived from these data. This information is not intended for navigation purposes.
U.S. Geological Survey, Pacific Coastal and Marine Science Center
PCMSC Science Data Coordinator
mailing and physical
2885 Mission Street
Santa Cruz
CA
95060
831-427-4747
pcmsc_data@usgs.gov
L200_pass_navigation.png
Map showing navigation along L200 planned trackline. Inset shows zoomed-in view at midpoint of L200 where the receive vessel (R/V San Lorenzo; RVSL) attempted to maintain stationary position for each pass of the source vessel (R/V Parke Snavely; RVPS).
PNG
The authors acknowledge our fellow participants of the sparker testing field activity 2021-619-FA (Pete Dal Ferro, Gerry Hatcher, Jared Kluesner, Rachel Marcuson, Jenny McKee, Dan Powers, and Rob Wyland) and our team involved in survey planning and execution (Jackson Currie, William Danforth, Jane Denny, Tim Elfers, Dave Foster, Nathan Miller, Eric Moore, and Carolyn Ruppel).
Navigational data (raw GGA format) were recorded using an Applanix PosMV Elite (https://www.applanix.com/downloads/products/specs/posmv/POS-MV-ELITE.pdf) positioning system . Tektronix SignalExpress software (v. 2015) continuously recorded TDMS files aboard the source vessel (RVPS). Anaconda (v. 4.10.1), Python (v.3.7), Jupyter notebook (v. 6.0.0), and SQLite (version 3.21.0) were used to process the source vessel navigation. Data are presented in csv format as well as a trackline shapefile produced with ArcGIS Pro (version 2.4.1).
Source vessel (RVPS) navigation files (raw GGA format) were imported and sorted into an SQLite database and the attribute fields were assigned in a Python notebook utilizing the Python tool PyProj.Geod WGS84. Source vessel navigation tracklines are also described in the accompanying shapefile (see 2021-619-FA_RVPS_SrcNavTrackline_shapefile.zip).
Quality control was conducted during acquisition and processing to ensure consistency of the vessel position and UTC time of acquisition.
Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
An Applanix POS-MV (Position and Orientation System for Marine Vessels) Elite was used to position the source vessel during data collection. The Applanix POS-MV Elite has a stated positional accuracy of 0.5-2 meters (https://www.applanix.com/downloads/products/specs/posmv/POS-MV-ELITE.pdf). Accuracies of final products may be lower due to total propagated uncertainties of the mapping systems, which include position and motion compensation system and navigation error.
No vertical positional data are provided.
Alicia F. Balster-Gee
Wayne E Baldwin
Patrick E. Hart
2022
R/V San Lorenzo (receive vessel) navigation and survey geometry from USGS field activity 2021-619-FA collected in April of 2021 offshore Santa Cruz, CA
comma-delimited text
online
U.S. Geological Survey
https://doi.org/10.5066/P9EHITBI
online data
20210419
20210428
ground condition at time data were collected
RVSL_recnav
Receiver vessel navigation data were used to calculate the offset distance between the sparker layback and the receiver vessel hydrophone.
Navigation data were acquired using an Applanix PosMV Elite differential Global Positioning System (DGPS) while the source vessel (RVPS) made several passes along seven planned survey tracklines ranging between 25 and 600 meters water depth. A unique code name was given to each navigation line where PS=the source vessel R/V Parke Snavely; L=line followed by 2- or 3-numerals representing the water depth (the water depth may be followed by an A denoting a planned replicate transect line); S=SIG ELP790 700-joule minisparker source, D10=1.0 kilojoule Delta sparker source, or D24=2.4 kilojoule Delta sparker source; subsequent passes are followed with a, b, c, d, and a numeral as needed.
20210427
Navigation data were recorded in raw GGA format. and in a series of Python notebooks the UTC timestamp, latitude, and longitude were extracted. The layback position of the sparker source was calculated to be 20 meters from the stern of the vessel, based on the measured length of the source cable deployed. The Python tool PyProj.Geod WGS84 was used to merge the data frames of the source layback latitude and longitude positions (lbsrc_lat and lbsrc_lon, respectively) and to calculate and assign the offset distance between the position of the sparker source (source layback) and the hydrophone deployed from the nearly stationary receiver vessel (RVSL) for each UTC time sample (utc_dt).
RVSL_recnav
20210427
Edits were made to correct spelling in author name. No data were changed. The metadata available from a harvester may supersede metadata bundled within a download file. Users are advised to compare the metadata date of this file to any similar file to ensure they are using the most recent version. (scochran@usgs.gov)
20230516
Point
Point
22337
0.000001
0.000001
Decimal degrees
D_WGS_1984
WGS_1984
6378137.000000
298.257224
2021-619-FA_RVPS_SrcNav.csv
CSV table containing attribute information associated with the data set.
Producer defined
linename
Name of navigation line
Assigned unique line identifier name
PS-L25_S_a
Pass ‘a’ with the SIG ELP790 minisparker source (power 700 joules) at the 25-meter depth site
Producer defined
PS-L25_S_b
Pass ‘b’ with the SIG ELP790 minisparker source (power 700 joules) at the 25-meter depth site
Producer defined
PS-L25_S_c
Pass ‘c’ with the SIG ELP790 minisparker source (power 700 joules) at the 25-meter depth site
Producer defined
PS-L25A_S_a
Pass ‘a’ with the SIG ELP790 minisparker source (power 700 joules) at the second 25-meter depth site ‘25A’
Producer defined
PS-L25A_S_a2
Pass ‘a2’ (part two of pass a) with the SIG ELP790 minisparker source (power 700 joules) at the 25-meter depth site ‘25A’
Producer defined
PS-L25A_S_a3
Pass ‘a3’ with the SIG ELP790 minisparker source (power 700 joules) at the 25-meter depth site ‘25A’
Producer defined
PS-L25A_S_b
Pass ‘b’ with the SIG ELP790 minisparker source (power 700 joules) at the 25-meter depth site ‘25A’
Producer defined
PS-L50_S_a
Pass ‘a’ with the SIG ELP790 minisparker source (power 700 joules) at the 50-meter depth site
Producer defined
PS-L50_S_b
Pass ‘b’ with the SIG ELP790 minisparker source (power 700 joules) at the 50-meter depth site
Producer defined
PS-L50A_S_a
Pass ‘a’ with the SIG ELP790 minisparker source (power 700 joules) at the 50-meter depth site ‘50A'
Producer defined
PS-L50A_S_a2
Pass ‘a2’ with the SIG ELP790 minisparker source (power 700 joules) at the 50-meter depth site ‘50A’
Producer defined
PS-L50A_S_b
Pass ‘b’ with the SIG ELP790 minisparker source (power 700 joules) at the 50-meter depth site ‘50A’
Producer defined
PS-L100_S_a
Pass ‘a’ with the SIG ELP790 minisparker source (power 700 joules) at the 100-meter depth site
Producer defined
PS-L100_S_b
Pass ‘b’ with the SIG ELP790 minisparker source (power 700 joules) at the 100-meter depth site
Producer defined
PS-L100_S_c
Pass ‘c’ with the SIG ELP790 minisparker source (power 700 joules) at the 100-meter depth site
Producer defined
PS-L100_S_c2
Pass ‘c2’ with the SIG ELP790 minisparker source (power 700 joules) at the 100-meter depth site
Producer defined
PS-L200_S_a
Pass ‘a’ with the SIG ELP790 minisparker source (power 700 joules) at the 200-meter depth site
Producer defined
PS-L200_S_b
Pass ‘b’ with the SIG ELP790 minisparker source (power 700 joules) at the 200-meter depth site
Producer defined
PS-L200_S_c
Pass ‘c’ with the SIG ELP790 minisparker source (power 700 joules) at the 200-meter depth site
Producer defined
PS-L200_D10_a
Pass ‘a’ with the Delta sparker source (power 1.0 kilojoule) at the 200-meter depth site
Producer defined
PS-L200_D10_b
Pass ‘b’ with the Delta sparker source (power 1.0 kilojoule) at the 200-meter depth site
Producer defined
PS-L200_D10_c
Pass ‘c’ with the Delta sparker source (power 1.0 kilojoule) at the 200-meter depth site
Producer defined
PS-L200_D10_d
Pass ‘d’ with the Delta sparker source (power 1.0 kilojoule) at the 200-meter depth site
Producer defined
PS-L600_S_a
Pass ‘a’ with the SIG ELP790 minisparker source (power 700 joules) at the 600-meter depth site
Producer defined
PS-L600_S_b
Pass ‘b’ with the SIG ELP790 minisparker source (power 700 joules) at the 600-meter depth site
Producer defined
PS-L600_D24_a
Pass ‘a’ with the Delta sparker source (power 2.4 kilojoules) at the 600-meter depth site
Producer defined
PS-L600_D24_b
Pass ‘b’ with the Delta sparker source (power 2.4 kilojoules) at the 600-meter depth site
Producer defined
nrp_lon
Navigation Reference Point (NRP) longitude value from the GPS antenna location on the source vessel
R/V Parke Snavely GPS (Applanix POS-MV)
-122.361167
-121.897193
longitude decimal degrees
0.000001
nrp_lat
Navigation Reference Point (NRP) latitude value from the GPS antenna location on the source vessel
R/V Parke Snavely GPS (Applanix POS-MV)
36.763300
36.992469
latitude decimal degrees
0.000001
lbsrc_lon
Source layback longitude position from the stern of the R/V Parke Snavelybased on the measured length of the cable deployed behind the source vessel
U.S. Geological Survey
-122.361282
-121.896982
decimal degrees
0.000001
lbsrc_lat
instrument layback latitude position based on the measured length of the cable deployed behind the source vesselSource layback latitude position from the stern of the R/V Parke Snavely
U.S. Geological Survey
36.763391
36.992559
decimal degrees
0.000001
offset
distance in meters between the instrument layback position of the sparker source off the stern of the source vessel and the hydrophone deployed from the nearly stationary receiver vessel
U.S. Geological Survey
10
5441
rounded to nearest meter
1
y
Year collected
time stamp from GGA navigation string from source vessel R/V Parke Snavely
2021
2021
year collected
1
jd
Julian Day collected
time stamp from GGA navigation string from source vessel R/V Parke Snavely
111
119
Julian day collected
1
h
hour collected in 24-hour format
time stamp from GGA navigation string from source vessel R/V Parke Snavely
14
20
hour of day collected
1
m
minute collected
time stamp from GGA navigation string from source vessel R/V Parke Snavely
0
59
minute of hour collected
1
s
second collected
time stamp from GGA navigation string from source vessel R/V Parke Snavely
0
59
second of minute collected
1
us
microsecond collected
time stamp from GGA navigation string from source vessel R/V Parke Snavely
48592
999936
microsecond of second of minute collected
1
utc_dt
Coordinated Universal Time (UTC) Day Time string
producer defined
Sequential unique whole numbers that are automatically generated. For example, 2021-04-23 18:31:02.999936+00:00 represents 2021-04-23 as the date collected and 18:31:02.999936+00:00 is the UTC time that the navigation point was taken.
surveyid
USGS field activity number (FAN) assigned to data collection activity
producer defined
2021-619-FA, details for which may be found at https://cmgds.marine.usgs.gov/fan_info.php?fan=2021-619-FA
vehicleid
name of the source vessel from which data were collected
producer defined
R/V Parke Snavely
deviceid
Sparker source type and power level (in joules)
producer defined
Applied Acoustics Delta Sparker (2400 J)
Brand name and model of sparker source and power level measured in joules
Producer defined
Applied Acoustics Delta Sparker (1000 J)
Brand name and model of sparker source and power level measured in joules
Producer defined
SIG ELP790 Sparker (700 J)
Brand name and model of sparker source and power level measured in joules
Producer defined
2021-619-FA_RVPS_SrcNavTrackline_shapefile.zip
Zip file contains a multi-line shapefile (.shp) of the source vessel tracklines (R/V Parke Snavely, RVPS) that contains attribute information associated with the data set.
Producer defined
linename
Name of navigation line
Assigned unique line identifier name
PS-L25_S_a
Pass ‘a’ with the SIG ELP790 minisparker source (power 700 joules) at the 25-meter depth site
Producer defined
PS-L25_S_b
Pass ‘b’ with the SIG ELP790 minisparker source (power 700 joules) at the 25-meter depth site
Producer defined
PS-L25_S_c
Pass ‘c’ with the SIG ELP790 minisparker source (power 700 joules) at the 25-meter depth site
Producer defined
PS-L25A_S_a
Pass ‘a’ with the SIG ELP790 minisparker source (power 700 joules) at the second 25-meter depth site ‘25A’
Producer defined
PS-L25A_S_a2
Pass ‘a2’ (part two of pass a) with the SIG ELP790 minisparker source (power 700 joules) at the 25-meter depth site ‘25A’
Producer defined
PS-L25A_S_a3
Pass ‘a3’ with the SIG ELP790 minisparker source (power 700 joules) at the 25-meter depth site ‘25A’
Producer defined
PS-L25A_S_b
Pass ‘b’ with the SIG ELP790 minisparker source (power 700 joules) at the 25-meter depth site ‘25A’
Producer defined
PS-L50_S_a
Pass ‘a’ with the SIG ELP790 minisparker source (power 700 joules) at the 50-meter depth site
Producer defined
PS-L50_S_b
Pass ‘b’ with the SIG ELP790 minisparker source (power 700 joules) at the 50-meter depth site
Producer defined
PS-L50A_S_a
Pass ‘a’ with the SIG ELP790 minisparker source (power 700 joules) at the 50-meter depth site ‘50A'
Producer defined
PS-L50A_S_a2
Pass ‘a2’ with the SIG ELP790 minisparker source (power 700 joules) at the 50-meter depth site ‘50A’
Producer defined
PS-L50A_S_b
Pass ‘b’ with the SIG ELP790 minisparker source (power 700 joules) at the 50-meter depth site ‘50A’
Producer defined
PS-L100_S_a
Pass ‘a’ with the SIG ELP790 minisparker source (power 700 joules) at the 100-meter depth site
Producer defined
PS-L100_S_b
Pass ‘b’ with the SIG ELP790 minisparker source (power 700 joules) at the 100-meter depth site
Producer defined
PS-L100_S_c
Pass ‘c’ with the SIG ELP790 minisparker source (power 700 joules) at the 100-meter depth site
Producer defined
PS-L100_S_c2
Pass ‘c2’ with the SIG ELP790 minisparker source (power 700 joules) at the 100-meter depth site
Producer defined
PS-L200_S_a
Pass ‘a’ with the SIG ELP790 minisparker source (power 700 joules) at the 200-meter depth site
Producer defined
PS-L200_S_b
Pass ‘b’ with the SIG ELP790 minisparker source (power 700 joules) at the 200-meter depth site
Producer defined
PS-L200_S_c
Pass ‘c’ with the SIG ELP790 minisparker source (power 700 joules) at the 200-meter depth site
Producer defined
PS-L200_D10_a
Pass ‘a’ with the Delta sparker source (power 1.0 kilojoules) at the 200-meter depth site
Producer defined
PS-L200_D10_b
Pass ‘b’ with the Delta sparker source (power 1.0 kilojoules) at the 200-meter depth site
Producer defined
PS-L200_D10_c
Pass ‘c’ with the Delta sparker source (power 1.0 kilojoules) at the 200-meter depth site
Producer defined
PS-L200_D10_d
Pass ‘d’ with the Delta sparker source (power 1.0 kilojoules) at the 200-meter depth site Enumerated_Domain_Value_Definition_Source: Producer defined
Producer defined
PS-L600_S_a
Pass ‘a’ with the SIG ELP790 minisparker source (power 700 joules) at the 600-meter depth site
Producer defined
PS-L600_S_b
Pass ‘b’ with the SIG ELP790 minisparker source (power 700 joules) at the 600-meter depth site
Producer defined
PS-L600_D24_a
Pass ‘a’ with the Delta sparker source (power 2.4 kilojoules) at the 600-meter depth site
Producer defined
PS-L600_D24_b
Pass ‘b’ with the Delta sparker source (power 2.4 kilojoules) at the 600-meter depth site
Producer defined
utc_dt_s
Coordinated Universal Time (UTC) Day Time string of start of navigation line
producer defined
Sequential unique whole numbers that are automatically generated. For example, 2021-04-23 18:31:02.999936+00:00 represents 2021-04-23 as the date collected and 18:31:02.999936+00:00 is the UTC time that the navigation point was taken.
utc_dt_e
Coordinated Universal Time (UTC) Day Time string of end of navigation line
producer defined
Sequential unique whole numbers that are automatically generated. For example, 2021-04-23 18:31:02.999936+00:00, where 2021-04-23 represents the date collected and 18:31:02.999936+00:00 is the UTC time that the navigation point was taken
surveyid
USGS field activity number (FAN) number assigned to data collection activity
producer defined
2021-619-FA, details for which may be found at https://cmgds.marine.usgs.gov/fan_info.php?fan=2021-619-FA
vehicleid
name of the vessel from which data were collected
producer defined
R/V Parke Snavely
deviceid
Sparker source type and power level (in joules)
producer defined
Applied Acoustics Delta Sparker (2400 J)
Brand name and model of sparker source and power level measured in joules
Producer defined
Applied Acoustics Delta Sparker (1000 J)
Brand name and model of sparker source and power level measured in joules
Producer defined
SIG ELP790 Sparker (700 J)
Brand name and model of sparker source and power level measured in joules
Producer defined
length_km
navigation trackline length (in kilometers)
vessel GPS
0.117
7.208
kilometers
0.001
Source vessel navigation tracklines are provided for visual purposes and described in the shapefile. The first line of the csv file is a header line.
U.S. Geological Survey
U.S. Geological Survey - CMGDS
mailing and physical
2885 Mission Street
Santa Cruz
CA
95060
831-427-4747
pcmsc_data@usgs.gov
Navigation, layback, and offset data are available in csv format (2021-619-FA_RVPS_SrcNav.csv) accompanied by a shapefile of trackline positions (2021-619-FA_RVPS_SrcNavTrackline_shapefile.zip).
Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.
comma-delimited text
RFC 4180
csv table
No compression applied
3.8
https://doi.org/10.5066/P9EHITBI
Data (2021-619-FA_RVPS_SrcNav.csv) can be downloaded using the Network_Resource_Name link and scrolling to the Navigation Data section.
None.
shapefile
ArcGIS Pro (version 2.4.1)
zip file contains a vessel navigation shapefile for the R/V Parke Snavely
The zip file can be decompressed with any zip utility (for example, 7zip, Keka, WinZip)
0.2388
https://doi.org/10.5066/P9EHITBI
Data (2021-619-FA_RVPS_SrcNavTrackline_shapefile.zip) can be downloaded using the Network_Resource_Name link and scrolling to the Navigation Data section.
None.
The csv data can be viewed with any text editing or spreadsheet software. Users must have software capable of reading shapefile (.shp) format to use the polyline shapefile.
20230516
U.S. Geological Survey, Pacific Coastal and Marine Science Center
PCMSC Science Data Coordinator
mailing and physical
2885 Mission Street
Santa Cruz
CA
95060
831-427-4747
pcmsc_data@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998