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Attribute Files (Orca)
Contents
Chapter 1: Introduction
Chapter 2: Standard line report - csv format
Chapter 3: Channel RMS
Chapter 3: NFH QC
Chapter 1: Introduction
These are the extra ASCII files that you can import into the Project Manager (PM) which are not the P1/11, and P2/11. They are all called ‘Attribute files’ in PM, and will be automatically interpreted from their headers based on standard logic built into PM. If the header text in these files is non-standard, then logic can be manually added to your project to interpret the files. Please email support@havian.com for this.
For Vessels operating Orca the common attribute files supported are
Standard line report - csv format
Channel RMS File - data at every shot
NFH QC
Chapter 2: Standard line report - csv format
Orca produces a standard line report in pdf, csv and sts format. The csv format can be imported into PM as an attribute file. Most of this standard file is a duplicate of attributes in the P2/11 or calculation based on P1/11 which are already done by PM, so they will not be extracted by the Project Manager. The only attributes not duplicated in the P2/11 are some network adjustment qc metrics
Streamer misclosures
Degrees of Freedom
Unit variance
The project Manager will also extract gun pressures, timing and a few other attributes from this file in case there are any issues with incomplete P2 data.
Example 1 - Linename-Standard_Line_Report.csv
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Network
Shot #,Time,main Quality,main DOF
3442,17/05/2019 19:16:42,0.14,822.00
3441,17/05/2019 19:16:48,0.14,822.00
3440,17/05/2019 19:16:54,0.14,823.00
Streamer Crossline Misclosure
Shot #,Time,S01 ClosureX m,S02 ClosureX m,S03 ClosureX m,S04
3442,17/05/2019 19:16:42,-24.83,-17.43,-10.14,-4.94
3441,17/05/2019 19:16:48,-25.72,-19.57,-12.32,-5.19
3440,17/05/2019 19:16:54,-26.50,-21.40,-14.95,-3.97
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Chapter 3: Channel RMS
This is a file that has channel RMS data at every shot. It typically contains 3-4 windows of RMS, with 2 being noise windows and 2 being signal windows.
This data is used to create the attributes ‘signal to noise’, and ‘source balance’, as well as populate RMS colour grid plots, and the channels module.
The following are all examples of acceptable file types. The file needs to clearly identify the shot and channel columns and some recognisable RMS window names.
Example 1 - RMSAscii_Seq0001_hyd.txt (PGS Standard)
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SHOTPNO | RECVR | RMS_WIN 1| RMS_WIN 2| RMS_WIN 3| RMS_WIN 4|
< 132| 1| 8.1719| 10.2246| 12.3584| 13.8496|
< 132| 2| 7.0195| 9.1895| 13.7422| 10.9453|
< 132| 3| 9.6172| 10.1777| 7.8174| 11.7129|
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Example 2 - 001-00000-RMS.txt
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SRC_POINT CABLE CHANNEL TGT_RMS DEEP_RMS WC_RMS
5863 1 1 422.35 35.40 8.17
5863 1 2 493.17 29.61 7.01
5863 1 3 489.58 30.01 9.6
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Example 3 - 001_multiplot_rms.csv
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SEISSHOT,CHANNEL,AWB_ATTR,TGT_ATTR,EOR_ATTR
3466,1,105.53226,78.27530,20.17127
3466,2,103.43647,84.11679,21.25785
3466,3,107.88797,80.71730,22.86609
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Chapter 4: NFH QC
A file that contains NFH attributes such as Bubble Period, RMS Peak and onset time at each NFH channel.
Example 1 - Seq1-NFH.txt
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# sequence, shot, NFH channel, peak amplitude, onset time (ms), bubble period (ms)
1 6711 1 6.24 49.69 77.37
1 6711 2 5.21 50.11 89.54
1 6711 3 10.92 51.03 136.69
1 6711 4 8.11 51.17 137.13
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Example 2 - seq0001_NFH_QC.txt
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acqseqno shotpno nfh peakamp onset_t bbl_per
1 812 1 895.584167 34.600002 100.000000
1 812 2 492.766174 35.000000 99.400009
1 812 3 418.364441 34.799999 77.000000
1 812 4 375.961365 34.799999 74.199997
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