Feature group

Feature

Sigma

Cableless systems with only shootblind capability

Cableless systems with some data return capability

Benefit of feature and related issues

Integrated source control, selects active spread, detects missing receivers

Comprehensive source control

Not always an option

Not always an option

Selects active spread, detects missing receiver points.

Passive operations and microseismic monitoring

Fully suppoorted

Limited support

Limited support

Permanent recording

Fully suppoorted

Limited support

Limited support

Impulsive

Any impulsive source

Not always an option

Not always an option

Limitations on source control interface may restrict some operations.

Vibroseis

All simultaneous vibroseis techniques fully supported

Not always an option

Not always an option

Mixed source

Fully supported

Not always an option

Not always an option