Radosavljevic, Boris; Tanski, George; Lantuit, Hugues (2019): Nearshore sub-bottom profiles at Herschel Island - Qikiqtaruk, Yukon, Canada [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.903731

Shallow reflective seismic surveys were carried out in the vicinity of Herschel Island in 2013. These data were collected to investigate the depositional dynamics to the west, north and east of the island. A portion of the Herschel Basin was also surveyed. The surveys were carried out in nearshore waters ca. 3-45 m deep and to about 5 km offshore, with a total line length of about 80 km.

The data were recorded using an Innomar SES-2000 compact sub-bottom profiler. The primary frequency for this instrument is approximately 100 kHz. The secondary frequency was varied between 5 and 15 kHz. Gain was applied during acquisitition (24-50 dB) depending on conditions. Positional data was recorded using a Trimble R4 Global Positioning System (GPS) where the antenna was mounted directly over the transducer without offset. Survey speed was generally <5 knots.

Data are provided as several SEG-Y files in a zip archive. The data were converted from the manufacturer's SES format using the proprietary SES Convert software. The 16 bit Integer SEG-Y files have little endian (PC) byte order. Navigational data was recorded in UTM Zone 7 N, in meters. Navigational data is also provided in tab separated files containing trace number, northing, easting and survey line ID. In addition, a zip file containing a shape file (polylines) is also provided.