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New versions of SEG-D

New versions of SEG-D. SEG Annual Meeting – Denver Tuesday Oct 28, 2014 Rune Hagelund, DAECO. SEG-D Rev 3.0 September 2014. Final version of 3.0 Further development will be 3.1. SEG-D Rev 3.0 September 2014 - Changes. New channel types ( ChannelSet byte 4) 0x9A Source excitation

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New versions of SEG-D

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  1. New versions of SEG-D SEG Annual Meeting – Denver TuesdayOct 28, 2014 Rune Hagelund, DAECO

  2. SEG-D Rev 3.0 September 2014 • Final version of 3.0 • Further development will be 3.1

  3. SEG-D Rev 3.0 September 2014 - Changes • New channel types (ChannelSet byte 4) • 0x9A Source excitation • 0x9B Source valve • 0x9C Source overload • New physical units supported for samples (ChannelSet byte 62) • 0x14 Millimeter • 0x15 Meter

  4. SEG-D Rev 3.0 September 2014 - Changes • Updated measurements to support Energistics Unit of Measure v1.0 • Some units removed and added • Note: % removed, use EUC • Several new measurement types added to http://www.seg.org/web/technical-standards-committee/wiki/-/wiki/Main/SegMeasurements

  5. SEG-D Rev 3.0 September 2014 - Changes • New producers • Seismic Instruments, Inc (code 54) • TGS (code 55) • Hewlett Packard (code 56) • Modern Seismic Technology, LLC (code 57)

  6. SEG-D Rev 3.0 September 2014 - Changes + some clarifications of usage • For more details please refer to release letter

  7. SEG-D Rev 3.1 • New version of SEG-D • New functionality: Little endian samples and new CRS definition format • Not binary compatible with Rev 3.0 • Most headers are identical • NOTE: Only samples can be little-endian, all headers are still big-endian

  8. SEG-D Rev 3.1 - Changes • Little endian samples • 9036 - Little endian 24 bit 2's complement integer • 9038 - Little endian 32 bit 2's complement integer • 9058 - Little endian 32 bit IEEE • 9080 - Little endian 64 bit IEEE • Other formats not supported as they do not match internal computer data formats • Would cause additional implementation and test cost for no benefit

  9. SEG-D Rev 3.1 - Changes • Added support for new P1/11 Coordinate Reference System definition format • Old 3.0 CRS format deprecated but still supported • Shared CRS format with all OGP P-formats (and the coming updated SPS and SEG-Y) • OGP is working on a format update so Appendix D1 will be changed accordingly prior to 3.1 publication

  10. SEG-D Rev 3.1 - Questions • Should more be added? • Can we go ahead and publish this version?

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