|
|
Signal Descriptions |
| Start | Finish | Description |
| 00:00.00 | 04:55.00 | Comb sequence c207-9d: [audio file] (4.7 MB, 8000 Hz sample rate, 16 bits/sample) [Power Spectral Density] CW signals at 207, 241, 289, 344, 394, 473, 569, 679, and 779 Hz. To compensate for transducer response, some CW signals are attenuated as follows: 473 Hz by 6 dB, 569 Hz by 16 dB, 679 Hz by 18 dB, and 779 Hz by 20 dB. The entire sequence is tapered at the beginning and end by a single half cycle 51.75 Hz sine wave. |
| 04:55.00 | 05:00.00 | Blanking period |
| 05:00.00 | 06:00.96 | Probe signal D-1: M-sequence m400_12_127_60_60S. [audio file] (1 MB, 8000 Hz sample rate, 16 bits/sample)[Power Spectral Density] [Autocorrelation] 127 digit complimentary phase modulated (at 60 degrees) M-sequence, centered at 400 Hz. Generator polynomial is (octal) 345, with initial register of 1. There are twelve cycles per digit. A single M-sequence is 3.81 seconds in duration; the sequence is repeated 16 times for a total length of 60.96 seconds. This sequence is scaled by sqrt(0.205) to match power with the comb sequence. |
| 06:00.96 | 15:00.00 | Blanking period |
W1_1D.wav: [audio
file] (1 MB, 8000 Hz sample rate, 16 bits/sample) Used during
P-3 operations with AGSS.
| Start | Finish | Description |
| 00:00.00 | 01:00.96 | Probe signal D-1 (unscaled): M-sequence m400_12_127_60_60. [audio file] (1 MB, 8000 Hz sample rate, 16 bits/sample)[Power Spectral Density] [Autocorrelation] 127 digit complimentary phase modulated (at 60 degrees) M-sequence, centered at 400 Hz. Generator polynomial is (octal) 345, with initial register of 1. There are twelve cycles per digit. A single M-sequence is 3.81 seconds in duration; the sequence is repeated 16 times for a total length of 60.96 seconds. |
W2_1D.wav: [audio
file] (960 kB, 8000 Hz sample rate, 16 bits/sample) USS DOLPHIN short
duration HFM signal
| Start | Finish | Description |
| 00:00.00 | 00:05.00 | Upward HFM, from 200 to 300 Hz |
| 00:05.00 | 00:10.00 | Blanking Period |
| 00:10.00 | 00:15.00 | Downward HFM, from 300 to 200 Hz |
| 00:15.00 | 00:20.00 | Blanking Period |
| 00:20.00 | 00:25.00 | Upward HFM, from 300 to 400 Hz |
| 00:25.00 | 00:30.00 | Blanking Period |
| 00:30.00 | 00:35.00 | Downward HFM, from 400 to 300 Hz |
| 00:35.00 | 00:40.00 | Blanking Period |
| 00:40.00 | 00:45.00 | Upward HFM, from 200 to 400 Hz |
| 00:45.00 | 00:50.00 | Blanking Period |
| 00:50.00 | 00:55.00 | Downward HFM, from 400 to 200 Hz |
| 00:55.00 | 01:00.00 | Blanking Period |
| Start | Finish | Description |
| 00:00.00 | 14:59.16 | Probe signal D-2: M-sequence m400_12_127_60_15 [audio file] (14.4 MB, 8000 Hz sample rate, 16 bits/sample) [Power Spectral Density] [Autocorrelation] 127 digit complimentary phase modulated (at 60 degrees) M-sequence, centered at 400 Hz. Generator polynomial is (octal) 345, with initial register of 1. There are twelve cycles per digit. A single M-sequence is 3.81 seconds in duration; the sequence is repeated 236 times for a total length of 899.16 seconds. Recommended for use during runs D22,D41, and D7.1. |
| 14:59.16 | 15:00.00 | Blanking period |
| Start | Finish | Description |
| 00:00.00 | 09:55.00 | Comb sequence c64-12ax: [audio file] (9.5 MB, 8000 Hz sample rate, 16 bits/sample) [Power Spectral Density] [detail]. CW signals at 64, 79, 94, 112, 130, 148, 166, 201, 235, 283, 338, and 388 Hz, all at the same amplitude. Additionally, CW signals at 67, 82, 97, 115, 133, 151, 169, 204, 238, 286, 341, and 391 Hz, all 20 dB down from the first twelve tones. The entire sequence is tapered at the beginning and end by a single half cycle 16 Hz sine wave. |
| 09:55.00 | 10:00.00 | Blanking period |
| 10:00.00 | 14:55.56 | Probe Signal A/X-1 This probe signal is scaled by sqrt(0.1197) to equalize power with the 10 minute c64-12ax comb signal. |
| 14:55.56 | 15:00.00 | Blanking period |
W2A_15AX.wav: [audio
file] (14.4 MB, 8000 Hz sample rate, 16 bits/sample) USS Acoustic Explorer
signal 2: for events without USS DOLPHIN (with 12 extra comb tones)
| Start | Finish | Description |
| 00:00.00 | 09:55.00 | Comb sequence c64-12ax: [audio file] (9.5 MB, 8000 Hz sample rate, 16 bits/sample) [Power Spectral Density] [detail]. CW signals at 64, 79, 94, 112, 130, 148, 166, 201, 235, 283, 338, and 388 Hz. Additionally, CW signals at 67, 82, 97, 115, 133, 151, 169, 204, 238, 286, 341, and 391 Hz, all 20 dB down from the first twelve tones. The entire sequence is tapered at the beginning and end by a single half cycle 16 Hz sine wave. |
| 09:55.00 | 10:00.00 | Blanking period |
| 10:00.00 | 14:57.18 | Probe Signal A/X-2: [audio file] (4.8 MB, 8000 Hz sample rate, 16 bits/sample) [Power Spectral Density]. M-sequence: 127 digits, 60 degree complimentary phase modulation centered at 300 Hz. 9 cycles per digit, generator polynomial of (octal) 367 with initial register 1. Each sequence lasts 3.81 seconds, but is repeated 78 times for a total of 297.18 seconds. This probe signal is scaled by sqrt(0.1197) to equalize power with the 10 minute c64-12ax comb signal. |
| 14:57.18 | 15:00.00 | Blanking period |
| Start | Finish | Description |
| 00:00.00 | 04:55.00 | Comb sequence c64-12ax: [audio file] [Power Spectral Density] [detail]. CW signals at 64, 79, 94, 112, 130, 148, 166, 201, 235, 283, 338, and 388 Hz. Additionally, CW signals at 67, 82, 97, 115, 133, 151, 169, 204, 238, 286, 341, and 391 Hz, all 20 dB down from the first twelve tones. The entire sequence is tapered at the beginning and end by a single half cycle 16 Hz sine wave. |
| 04:55.00 | 05:00.00 | Blanking period |
| 05:00.00 | 09:55.56 | Probe Signal A/X-3 This probe signal is scaled by sqrt(0.1197) to equalize power with the c64-12ax comb signal. |
W4_15AX.wav: [audio
file] (14.4 MB, 8000 Hz sample rate, 16 bits/sample) USS Acoustic Explorer
signal 4: long duration probe
| Start | Finish | Description |
| 00:00.00 | 14:59.16 | Probe signal A/X-4: M-sequence m300_9_127_60_15 [audio file] [Power Spectral Density] [Autocorrelation] 127 digit complimentary phase modulated (at 60 degrees) M-sequence, centered at 300 Hz. Generator polynomial is (octal) 367, with initial register of 1. There are nine cycles per digit. A single M-sequence is 3.81 seconds in duration; the sequence is repeated 236 times for a total length of 899.16 seconds. Recommended for use during run XD6.1. |
| 14:59.16 | 15:00.00 | Blanking period |
W5_15AX.wav: [audio file]
(14.4 MB, 8000 Hz sample rate, 16 bits/sample) USS Acoustic Explorer signal
5: long duration PRN sequence.
| Start | Finish | Description |
| 00:00.00 | 15:00.00 | Probe signal A/X-5: PRN sequence prn15 [audio file] [Power Spectral Density] This is a nonrepeating white noise sequence, bandlimited between 250 and 300 Hz. A Kaiser-Bessel window filter was used to filter broadband noise, with a transition width of 1Hz and ripple of -60 dB. This sequence is exactly 15 minutes in duration. Recommended for use during run XD6.1. |
| Last Updated: 000703 |
 |
