OR/14/014 Part 1: Survey information

From Earthwise
Jump to: navigation, search
Beamish D and White J. 2014. TellusSW: airborne geophysical data and processing report . British Geological Survey Internal Report, OR/14/014.

Survey area

The following figures (Figure 7) place the survey area in the context of the ONC Chart.

Figure 7: the geographical location as depicted on Google Earth

Figure 8: Survey area over Digital Terrain Map

Figure 9: Survey area over topography (SRTM)

Figure 7 Survey area over Google Earth Satellite Image.
Figure 8 Survey area over Digital Terrain Map.
Figure 9 Survey area over topography (SRTM).
Figure 10 Completed survey lines (flight path trimmed to the survey area.

Geographical coordinates systems used

The data is provided in [OSGB 1936] (21m) UK — Great Britain; Isle of Man geographical coordinates system, EPSG code 4277.

Survey boundaries

The following coordinates define the survey boundaries (see Figure 10).

200 X 2000m Mag_Spec

#

X

Y

LATITUDE
DD.MM.SS.ss

LONGITUDE
DD.MM.SS.ss

1

458320 5557292 50.09.58.940 -3.35.00.947

2

439047 5557034 50.09.44.579 -3.51.12.188

3

421015 5569274 50.16.13.139 -4.06.30.058

4

400371 5574101 50.18.38.135 -4.23.57.208

5

377342 5569674 50.15.59.238 -4.43.15.870

6

377421 5563812 50.12.49.588 -4.43.05.057

7

358031 5553650 50.07.05.158 -4.59.09.206

8

351180 5537610 49.58.20.110 -5.04.31.548

9

340831 5532212 49.55.15.845 -5.13.02.698

10

330857 5547499 50.03.20.538 -5.21.46.691

11

303562 5541422 49.59.33.816 -5.44.26.688

12

303254 5564404 50.11.56.704 -5.45.24.728

13

332029 5570398 50.15.42.525 -5.21.24.161

14

344980 5587224 50.24.59.650 -5.10.55.444

15

351447 5592322 50.27.50.609 -5.05.35.248

16

354291 5606491 50.35.31.613 -5.03.31.016

17

376682 5618701 50.42.25.304 -4.44.47.420

18

386517 5629897 50.48.34.835 -4.36.38.626

19

389247 5655149 51.02.13.922 -4.34.46.800

20

407519 5655397 51.02.33.582 -4.19.09.114

21

410822 5675665 51.13.31.420 -4.16.37.605

22

423879 5675843 51.13.43.989 -4.05.24.724

23

423825 5679840 51.15.53.328 -4.05.30.570

24

456658 5680287 51.16.20.192 -3.37.16.756

Survey parameters

Line spacing : 200
Tie line spacing : 2000
Line direction :
Tie line direction : 90°
Total number of lines : 776
Total number of tie lines : 73
Total line kilometres : 54704
Total tie line kilometres : 5972
Sensor clearance magnetic : ~80 metres

The survey was flown to a drape surface.

Reflight specificatons

Parameter

Data Specification

Diurnal: Diurnal variation in excess of 5 nT per 2 minutes
Positional: Line spacing should not exceed 1.25 times and not be less than 0.75 times the nominal line spacing for distances greater than 3.0 km along the flight path
Altitude: In excess of 15 m deviation for 5000 metres or more dependent upon safety
On-line magnetic data: The noise envelope of each sensor will remain below 0.2 nT outside zones where there are a pronounced magnetic gradient.