The following OASN input file fram4.dat produces the covariance matrix and replicas used for the arctic matched field study reported in Ref. [14]:
# >>> Block I: Title
FRAM IV environment.
# >>> Block II: Options
R N J 3 # Covariance, replicas, cos^3 sources
# >>> Block III: Frequency sampling
20 20 1 0 # 20 Hz
# >>> Block IV: Environment
12
0 0 0 0 0 0 0
0 1431 -1443 0 0 1 0
85 1443 -1460 0 0 1 0
200 1460 -1462 0 0 1 0
330 1462 -1466 0 0 1 0
1225 1466 -1508 0 0 1 0
3800 1508 0 1.0 0 2.2 0
4200 1508 -2506 0.5 0 2.9 0
4433 2506 -3503 0.5 0 2.9 0
4667 3503 -4500 0.5 0 2.9 0
4900 4500 -6000 0.4 0 2.9 0
5900 6000 0 0.2 0 2.9 0
# >>> Block V: Receiver Array
18 # 18 elements
30 0 0 1 -1 # Hydrophone at z = 30 m. Gain -1 dB
60 0 0 1 -1
90 0 0 1 -1
140 0 0 1 -1
180 0 0 1 -7
210 0 0 1 -7 # Hydrophone at z =210 m. Gain -7 dB
270 0 0 1 -1
330 0 0 1 -1
350 0 0 1 -1
390 0 0 1 -1
450 0 0 1 -1
510 0 0 1 -1
570 0 0 1 -1
630 0 0 1 -1
690 0 0 1 -1
782 0 0 1 -1
860 0 0 1 -1
960 0 0 1 -1 # Hydrophone at z =960 m. Gain -1 dB
# >>> Block VI: Noise and Signal Sources
70 50 0 1 # 70 dB surface noise. 50 dB white noise
# 1 discrete source
# >>> Block VII: Surface noise
1400 1E8 # CMINS, CMAXS
400 400 100 # Samples in cont., discr., evanes. spec.
# >>> Block IX: Discrete source parameters
91 250 0 180 # Source at depth 91 m, 250 km x-range,
# strength 180 dB.
1425 1570 # CMIN, CMAX. Only waterborne important.
512 25 490 # 512 samples. (-1 0 0 for auto sampling)
# >>> Block X: Replica parameters
10 1000 23 # 23 source depth, 10 - 1000 m
150 300 76 # 76 source ranges, 150 - 300 km
0 0 1 # 1 y-range (omnidirectional response)
1425 1570 # CMINR, CMAXR. Only waterborne important.
512 25 490 # 512 samples. (-1 0 0 for auto sampling)