Ghosts in the data: false detections in VEMCO pulse position modulation acoustic telemetry monitoring equipment

Table 1 Distribution of false detection tag ID codes by receiver

Receiver	Depth (m)	Orientation	Number of false detection tag ID codes	Number of unique false detection tag ID codes	Detection of false tag ID codes	Mean number of false detections per day	Comparison to Poisson (random daily detections)
Receiver	Depth (m)	Orientation	Number of false detection tag ID codes	Number of unique false detection tag ID codes	Detection of false tag ID codes	Mean number of false detections per day	Χ²	P
101,715	21	Down	30	7	58	0.25	53.8	<0.0001
101,717	21	Down	29	5	68	0.29	180.1	<0.0001
101,713	54	Down	44	5	92	0.39	126.0	<0.0001
101,714	54	Down	46	4	147	0.63	258.3	<0.0001
101,718	78	Up	59	7	128	0.54	81.5	<0.0001
101,711	78	Up	44	4	107	0.46	561.1	<0.0001
101,710	78	Down	67	10	179	0.76	423.2	<0.0001
101,712	78	Down	64	24	197	0.84	139.6	<0.0001

ISSN: 2050-3385