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EURASIP Journal on Wireless Communications and Networking

Table 1 Packets are grouped at the second “observation time”

From: UWSNs positioning technology based on iterative optimization and data position correction

Observation node ID

Observed database

Location data

Observed time

First received ID

First received time

4

…

(58, 34)

2

1

2.0072

4

…

(58, 34)

2

2

2.0023

4

…

(58, 34)

2

3

2.0056

5

…

(41, 40)

2

3

2.0076

6

…

(42, 30)

2

7

2.0035

7

…

(38, 37)

2

8

2.0066

8

…

(40, 28)

2

6

2.0039

9

…

(51, 27)

2

1

2.0067

9

…

(51, 27)

2

2

2.0071

9

…

(51, 27)

2

4

2.0078

9

…

(51, 27)

2

6

2.0056

9

…

(51, 27)

2

8

2.0023

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