The goal of rsk is to facilitate fast reading of pressure and temperature RBR files. This package is in development and exploration stage as it is accessing a binary table of the .rsk file and the format may change in the future. I am not associated with RBR Ltd., and the focus of this package has been on the compact solo and duet devices for pressure and temperature. If you need a more stable reader for RBR files you may find the oce package more useful.
Steps:
- read SQLite3 database tables (*.rsk)
- check date times
- convert binary data (downloads table) to millivolt
- apply basic calibration parameters
- apply temperature compensation for pressure
The development version from GitHub with:
# install.packages("devtools")
devtools::install_github("jkennel/rsk")library(rsk)
library(oce)
#> Loading required package: gsw
fn = "../../r_scratch/c2 081870_20240501_1603.rsk"
# this reads in the data
system.time(rbr_rsk <- Rsk$new(file_name = fn, raw = TRUE))
#> user system elapsed
#> 1.574 0.419 1.653
system.time(rbr_rsk <- Rsk$new(file_name = fn, raw = FALSE))
#> user system elapsed
#> 5.495 0.341 5.162
system.time(rbr_oce <- oce::read.rsk(file = fn))
#> user system elapsed
#> 11.407 0.481 11.890The data is stored in a single data.table in wide format. raw refers to the millivolt measurements. For newer duets, temperature is measured onboard and at the sensor tip. pressure_dbar_comp refers to the final temperature compensated pressure.
rbr_rsk$data
#> Key: <datetime>
#> datetime temp12 pres26 temp05
#> <POSc> <num> <num> <num>
#> 1: 2023-12-08 19:51:38 21.83675 9.490034 24.72569
#> 2: 2023-12-08 19:51:39 21.79042 9.495672 24.60640
#> 3: 2023-12-08 19:51:40 21.70013 9.492937 24.63025
#> 4: 2023-12-08 19:51:41 21.67313 9.492478 24.65410
#> 5: 2023-12-08 19:51:42 21.67435 9.491035 24.63025
#> ---
#> 12528671: 2024-05-01 20:02:48 19.21357 9.427519 18.56454
#> 12528672: 2024-05-01 20:02:49 19.19873 9.428241 18.61078
#> 12528673: 2024-05-01 20:02:50 19.18560 9.427547 18.56454
#> 12528674: 2024-05-01 20:02:51 19.18334 9.431602 18.58766
#> 12528675: 2024-05-01 20:02:52 19.18289 9.430419 18.58766rbr_rsk$glance()
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