Transect metadata for the Kerguelen2015 pyRAM transmission loss table

One row per transect in kerguelen2015TL, giving the azimuth, source location, and the range at which that transect's bathymetry (cmems_mod_glo_phy_my_0.083deg_static) runs onto land. This is a different bathymetry product from whatever the AWR manuscript's own AcTUP/WOA18-based cde() calls use, so it finds a different coastline and cannot be substituted for that pipeline's own truncation vector, or vice versa.

Usage

kerguelen2015TLmeta

Format

A data.frame with 24 rows, one per transect:

azimuths

Transect bearing, degrees, 0 to 345 in 15 degree steps.

lonStart, latStart

Source location (WGS84).

TruncationDistance_m

Range in metres at which this transect leaves the modelled bathymetry. 1,000,000 where the full 1000 km transect stays in water.

freq_hz, zr_m, call_type, site, season, year

Simulation parameters: 25 Hz, 20 m receiver depth, combined ABW/fin call type, Kerguelen2015, summer 2015.

ssp_source, bathy_source

GLORYS12V1 and the static CMEMS bathymetry product used for the land mask.

Source

S:/manuscripts/2026-CopernicusPyRAM/data/output/metadata/TL_Kerguelen2015_combined_25hz_GLORYS12_summer_25Hz_metadata.csv. Bundled with kerguelen2015TL in data/kerguelen2015pyram.rda; rebuild both via data-raw/kerguelen2015pyram.R.

Details

Build the truncation vector for kerguelen2015TL by matching on azimuth, not row position:

transectAz <- as.numeric(sub("^tl", "", names(kerguelen2015TL)[-1]))
trunc      <- kerguelen2015TLmeta$TruncationDistance_m[
                match(transectAz, kerguelen2015TLmeta$azimuths)]