Groovy script that extracts CTD data from LSF and prints out the result as CSV

lsf2.groovy

import pt.lsts.imc.*
import pt.lsts.imc.lsf.*
import pt.lsts.util.WGS84Utilities

// Obtain an LSF index object
idx = new LsfIndex(new File("/path/to/Data.lsf"))

// Create a scanner
scanner = new IndexScanner(idx);

// print the header of the CSV
println "time, latitude, longitude, depth, conductivity, temperature"

// while there are valid values in the file... 
while (true) {
	
	// look for the next Conductivity message from CTD entity
	c = scanner.next(Conductivity.class, "CTD");
	// look for the next Temperature message from CTD entity
	t = scanner.next(Temperature.class, "CTD");
	// look for the next EstimatedState message (from any entity)
	s = scanner.next(EstimatedState.class);
	
	// if one of the messages is missing, stop
	if (!c || !t || !s)
		break
	
	// calculate absolute location from state
	pos = WGS84Utilities.toLatLonDepth(s)
	
	// print sample
	println "$s.timestampMillis, ${pos[0]}, ${pos[1]}, ${pos[2]}, $c.value, $t.value"
}