Estimation of pop-up satellite archival tag initial surface position: applications for eastern Bering Sea crab research

Table 2 Summary information for PSATs deployed at fixed positions in Bristol Bay (BB) and Marmot Bay (MB), Alaska and comparison of estimate (est.) error (distance from a tag’s fixed position to its estimated pop-up location) and drift error (distance from a tag’s fixed position to its first high-quality Argos location estimate)

Tag	Type	Site	Method	Days	Surfaced	Drift (h)	Drift error (km)	Est. error (km)	Rel. % change	95% ellipse	Dist. To ellipse (km)
202076	mrPAT	BB	Proxy	97	10/14/20	7.0	3.5	1.5	59%	Y	–
202078	mrPAT	BB	Proxy	95	10/13/20	6.0	2.7	2.2	19%	N	0.6
202079	mrPAT	BB	Proxy	96	10/14/20	2.7	5.3	0.9	83%	Y	–
225140	mrPAT	BB	Proxy	56	1/3/22	38.4	24.8	4.8	80%	N	0.8
225142	mrPAT	BB	Proxy	65	1/3/22	17.1	26.0	4.4	83%	N	1.2
225145	mrPAT	BB	Proxy	65	1/3/22	26.0	30.8	6.5	79%	N	4.8
225147	mrPAT	BB	Proxy	56	1/3/22	3.1	7.9	0.7	91%	Y	–
215055	MiniPAT	BB	Proxy	184	5/2/22	3.5	5.4	0.4	92%	Y	–
215056	MiniPAT	BB	Proxy	177	5/2/22	4.1	6.8	1.6	76%	N	1.0
224690	MiniPAT	BB	Proxy	175	5/2/22	1.5	2.1	2.8	− 34%	N	0.7
224691	MiniPAT	BB	Proxy	177	5/2/22	2.5	1.9	0.3	83%	Y	–
224692	MiniPAT	BB	Proxy	175	5/2/22	0.8	0.6	0.6	− 3%	Y	–
224693	MiniPAT	BB	Target	185	5/2/22	2.0	0.4	0.4	16%	Y	–
224694	MiniPAT	BB	Target	178	5/2/22	0.6	1.4	0.9	39%	Y	–
224696	MiniPAT	BB	Proxy	174	5/2/22	1.3	2.6	0.4	86%	Y	–
224697	MiniPAT	BB	Target	182	5/2/22	1.8	3.0	1.8	41%	N	0.3
224663	MiniPAT	MB	Target	59	7/26/22	0.6	1.1	0.9	16%	Y	–
224664	MiniPAT	MB	Target	59	7/26/22	0.9	1.0	1.4	− 31%	N	0.7
234565	mrPAT	MB	Proxy	59	7/26/22	8.1	11.8	1.6	87%	N	1.0
234566	mrPAT	MB	Proxy	60	7/27/22	0.3	1.0	1.0	− 5%	N	0.1
234567	mrPAT	MB	Proxy	59	7/26/22	8.4	10.6	2.8	73%	N	2.1
234568	mrPAT	MB	Proxy	60	7/27/22	10.0	10.5	4.0	62%	N	1.6
234570	mrPAT	MB	Proxy	60	7/27/22	8.7	12.1	2.1	83%	N	0.5
234571	mrPAT	MB	Proxy	59	7/26/22	11.6	21.3	5.1	76%	N	4.1
234572	mrPAT	MB	Proxy	60	7/27/22	7.5	10.5	1.9	82%	N	0.6
234573	mrPAT	MB	Proxy	59	7/26/22	0.9	1.4	0.7	50%	Y	–
234574	mrPAT	MB	Proxy	60	7/27/22	2.1	1.3	1.2	2%	N	0.4

The relative (rel.) percentage change in accuracy between drift error and estimate error is given along with whether a tag’s fixed position (best approximation of true pop-up location) was captured by the 95% error ellipse associated with estimated pop-up location (Y), or if not (N), the minimum distance (dist.) between the ellipse boundary and the tag’s fixed position is given. Tags that required manual estimation of pop-up location are indicated in bold

ISSN: 2050-3385