Matching Detections to Times

Overview

Teaching: 15 min
Exercises: 0 min

Questions

• What is time matching?

• How do we perform time matching?

Objectives

• Explain time matching.

• Step through the process of matching detections with times.

Assigning DateTimes to Receivers

We’ll join all the detections to station names, then filter out based on deploy and recovery date of the receiver and the detection timestamp.

det_file <- file.path('data', 'detections.csv')
rcv_file <- file.path('data', 'deployments.csv')

dets <- read_glatos_detections(det_file)
Rxdeploy <- read_glatos_receivers(rcv_file)


dets_with_stations <- left_join(
  dets %>% rename(
    deploy_long_det = deploy_long,
    deploy_lat_det = deploy_lat
  ), 
  Rxdeploy, by=c("station"))
dets_with_stations <- dets_with_stations %>% 
  filter(detection_timestamp_utc >= deploy_date_time, detection_timestamp_utc <= recover_date_time)

Key Points

• Time matching links station deployment information to verify that all detections fall within the deployment period.

• Generate a dataset for the station info in order to group detections.