Performance of an ultrasonic telemetry positioning system under varied environmental conditions

Table 3 Transmitters present in array during study period

Site	Transmitters (n)	Transmitter location	Transmitter type	Fixed transmitter delay (s)	Estimated total transmissions emitted/day	Positioning efficiency of fixed transmitters
Coastal	6	Fixed	V9-2H	450-500	8,986	0.02
Coastal	46	Animal	V9-2H	450-500	8,986	0.02
Estuarine	10	Fixed	V13-1 L	600-800	31,114	0.28
	3	Fixed	V13-1 L	170-310
	20	Animal	V13-1 L	30-90
Riverine	5	Fixed	V13-1H	600-800	27,906	0.00
	1	Fixed	V16-1 L	600-800
	22	Animal	variable	Variable

Positioning efficiency is median of efficiencies calculated at 12-hr intervals per tag. Only fixed tags were used directly in analyses. However animal tags are noted as they may increase collision rates of ultrasonic signals within an array.

ISSN: 2050-3385