Item Identification

Title: SEG-Y headers
Short Name: SEG-Y headers
Status: Completed
Abstract:

32-bit integer SEG-Y data format | Description Source: Fugro

Notes:

Converted from FGDC using 'fgdc_to_inport_xml_entity.pl' script.

Data Attributes

Attribute Summary

Rubric Score Primary Key? Name Type Description
100
bytes_1_4 Unknown trace sequence number | Description Source: Fugro
100
bytes_17_20 Unknown shotpoint number | Description Source: Fugro
100
bytes_37_40 NUMBER distance from source point to receiver group | Description Source: Fugro
100
bytes_49_52 NUMBER source depth below surface | Description Source: Fugro
100
bytes_61_64 Unknown water depth at source (meters) | Description Source: Fugro
100
bytes_73_76 Unknown source x-coordinate (easting UTM WGS84 Zone 18N) | Description Source: Fugro
100
bytes_77_80 Unknown source Y-coordinate (northing UTM WGS84 Zone 18N) | Description Source: Fugro
100
bytes_115_116 Unknown number of samples in this trace | Description Source: Fugro
100
bytes_117_118 NUMBER sample interval in microseconds for this trace | Description Source: Fugro
100
bytes_121_122 NUMBER instrument gain | Description Source: Fugro
100
bytes_127_128 NUMBER sweep frequency at start | Description Source: Fugro
100
bytes_129_130 NUMBER sweep frequency at end | Description Source: Fugro
100
bytes_131_132 NUMBER sweep length in microseconds | Description Source: Fugro
100
bytes_141_142 NUMBER alias filter | Description Source: Fugro
100
bytes_157_158 NUMBER Year data recorded | Description Source: Fugro
100
bytes_159_160 Unknown day of year | Description Source: Fugro
100
bytes_161_162 Unknown hour of day | Description Source: Fugro
100
bytes_163_164 Unknown minute of hour | Description Source: Fugro
100
bytes_165_166 Unknown second of minute | Description Source: Fugro
100
bytes_167_168 NUMBER time basis code (1-local, 2-GMT, 3-other) | Description Source: Fugro

Attribute Details

bytes_1_4

CC ID: 659823
Seq. Order: 1
Data Storage Type: Unknown
Required: No
Primary Key: No
Status: Active
Description:

trace sequence number | Description Source: Fugro

Allowed Values: Varies per line

bytes_17_20

CC ID: 659824
Seq. Order: 2
Data Storage Type: Unknown
Required: No
Primary Key: No
Status: Active
Description:

shotpoint number | Description Source: Fugro

Allowed Values: Varies per line

bytes_37_40

CC ID: 659825
Seq. Order: 3
Data Storage Type: NUMBER
Required: No
Primary Key: No
Status: Active
Description:

distance from source point to receiver group | Description Source: Fugro

Unit of Measure: meter
Allowed Values: 0 - 0

bytes_49_52

CC ID: 659826
Seq. Order: 4
Data Storage Type: NUMBER
Required: No
Primary Key: No
Status: Active
Description:

source depth below surface | Description Source: Fugro

Unit of Measure: meter
Allowed Values: 1 - 1

bytes_61_64

CC ID: 659827
Seq. Order: 5
Data Storage Type: Unknown
Required: No
Primary Key: No
Status: Active
Description:

water depth at source (meters) | Description Source: Fugro

Allowed Values: Varies per line

bytes_73_76

CC ID: 659828
Seq. Order: 6
Data Storage Type: Unknown
Required: No
Primary Key: No
Status: Active
Description:

source x-coordinate (easting UTM WGS84 Zone 18N) | Description Source: Fugro

Allowed Values: Varies per line

bytes_77_80

CC ID: 659829
Seq. Order: 7
Data Storage Type: Unknown
Required: No
Primary Key: No
Status: Active
Description:

source Y-coordinate (northing UTM WGS84 Zone 18N) | Description Source: Fugro

Allowed Values: Varies per line

bytes_115_116

CC ID: 659830
Seq. Order: 8
Data Storage Type: Unknown
Required: No
Primary Key: No
Status: Active
Description:

number of samples in this trace | Description Source: Fugro

Allowed Values: Varies per line

bytes_117_118

CC ID: 659831
Seq. Order: 9
Data Storage Type: NUMBER
Required: No
Primary Key: No
Status: Active
Description:

sample interval in microseconds for this trace | Description Source: Fugro

Unit of Measure: microseconds
Allowed Values: 40 - 40

bytes_121_122

CC ID: 659832
Seq. Order: 10
Data Storage Type: NUMBER
Required: No
Primary Key: No
Status: Active
Description:

instrument gain | Description Source: Fugro

Allowed Values: 0 - 0

bytes_127_128

CC ID: 659833
Seq. Order: 11
Data Storage Type: NUMBER
Required: No
Primary Key: No
Status: Active
Description:

sweep frequency at start | Description Source: Fugro

Unit of Measure: kHz
Allowed Values: 2 - 2

bytes_129_130

CC ID: 659834
Seq. Order: 12
Data Storage Type: NUMBER
Required: No
Primary Key: No
Status: Active
Description:

sweep frequency at end | Description Source: Fugro

Unit of Measure: kHz
Allowed Values: 16 - 16

bytes_131_132

CC ID: 659835
Seq. Order: 13
Data Storage Type: NUMBER
Required: No
Primary Key: No
Status: Active
Description:

sweep length in microseconds | Description Source: Fugro

Unit of Measure: microseconds
Allowed Values: 20 - 20

bytes_141_142

CC ID: 659836
Seq. Order: 14
Data Storage Type: NUMBER
Required: No
Primary Key: No
Status: Active
Description:

alias filter | Description Source: Fugro

Unit of Measure: kHz
Allowed Values: 12.5 - 12.5

bytes_157_158

CC ID: 659837
Seq. Order: 15
Data Storage Type: NUMBER
Required: No
Primary Key: No
Status: Active
Description:

Year data recorded | Description Source: Fugro

Allowed Values: 2009 - 2009

bytes_159_160

CC ID: 659838
Seq. Order: 16
Data Storage Type: Unknown
Required: No
Primary Key: No
Status: Active
Description:

day of year | Description Source: Fugro

Allowed Values: Varies per line

bytes_161_162

CC ID: 659839
Seq. Order: 17
Data Storage Type: Unknown
Required: No
Primary Key: No
Status: Active
Description:

hour of day | Description Source: Fugro

Allowed Values: Varies per line

bytes_163_164

CC ID: 659840
Seq. Order: 18
Data Storage Type: Unknown
Required: No
Primary Key: No
Status: Active
Description:

minute of hour | Description Source: Fugro

Allowed Values: Varies per line. This value is recorded to the SEG-Y file header from the Sub bottom profiler PC clock which was offset from GPS time (as collected by the side scan sonar system).

bytes_165_166

CC ID: 659841
Seq. Order: 19
Data Storage Type: Unknown
Required: No
Primary Key: No
Status: Active
Description:

second of minute | Description Source: Fugro

Allowed Values: Varies per line. This value is recorded to the SEG-Y file header from the Sub bottom profiler PC clock which was offset from GPS time (as collected by the side scan sonar system).

bytes_167_168

CC ID: 659842
Seq. Order: 20
Data Storage Type: NUMBER
Required: No
Primary Key: No
Status: Active
Description:

time basis code (1-local, 2-GMT, 3-other) | Description Source: Fugro

Allowed Values: 3 - 3

Catalog Details

Catalog Item ID: 49330
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 08:31+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2019-06-04 13:14+0000
Metadata Record Published: 2017-11-16
Owner Org: OCM
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Next Review Date: 2018-11-17