Gather Types | Frequently Asked Questions (2024)

There are three types of gathers:

  1. Type 1 (Regular offset) — Gathers that have regular offsets for every CMP (Type 1 = same, same).
  2. Type 2 (Irregular offset) — Gathers that have irregular offsets, but the same irregularity for every CMP (Type 2 = different, same).
  3. Type 3 (Irregular offset, and location-dependent) — Gathers that have irregular offsets, and the offset irregularity is different for every CMP (Type 3 = different, different).

Examples

Type 2 example:

CMP1: Trace 1 offset 75m, Trace 2 offset 155m, Trace 3 offset 240m, etc (no regular increment)

CMP2: Trace 1 offset 75m, Trace 2 offset 155m, Trace 3 offset 240m, etc (but the irregularity is the same for every CMP)

Type 3 example

CMP1: Trace 1 offset 75m, Trace 2 offset 155m, Trace 3 offset 240m, etc (no regular increment)

CMP2: Trace 1 offset 80m, Trace 2 offset 165m, Trace 3 offset 245m, etc (and irregularity between CMPs).

General Discussion

Most gathers are typically Type 1.

Depending on the acquisition geometry and processing, some gather datasets may be Type 2 and, even less commonly, Type 3. The most common use for Type 2 and Type 3 is when the gather dimension is not offset (i.e. frequency).

Type 2 gathers have the following properties:

  • low fold data
  • acquired in feet, offsets converted to metres (rounding errors give increments of 24, 25, 24, 25, 25, 24)
  • spectral decomposition frequency (i.e. many lower frequencies, but more sparse in higher frequencies).

Type 3 gathers are mostly used for shot gathers, channel gathers and other similar raw data. It treats each gather like a bucket of traces and has to sort through them when it gets there.

Gather Types | Frequently Asked Questions (2024)

FAQs

What is the 5-point Likert scale? ›

5-Point Likert Scale

It typically ranges from 1 to 5, with 1 representing “Strongly Disagree,” 2 representing “Disagree,” 3 representing “Neutral” or “Neither Agree nor Disagree,” 4 representing “Agree,” and 5 representing “Strongly Agree.”

What is the 5 rating scale? ›

1 to 5 Numerical Rating Scale. This is a straightforward numeric scale where respondents rate something on a numerical scale from 1 to 5, with 1 representing the lowest or worst option and 5 representing the highest or best option. Such 1 to 5 numeric scales are often used for quick and simple assessments.

What is the 5 scale rating of satisfaction? ›

Businesses commonly utilize rating scales to assess satisfaction levels in customer satisfaction surveys. These scales can be numerical (e.g., 1-5, 1-10) or descriptive (e.g., extremely unhappy, dissatisfied, neutral, satisfied, extremely satisfied).

Which types of questions can we use to gather information? ›

Close-ended questions are undoubtedly efficient and can save a lot of time. They allow you to gather information through limited response options quickly. Close-ended questions also minimize ambiguity. There's really no questioning a "yes" or a "no" response.

What are common 5-point Likert scale examples? ›

5-point Likert scale
  • Very difficult.
  • Somewhat difficult.
  • Neither difficult nor easy.
  • Somewhat easy.
  • Very easy.

Is a 5 or 7 point Likert scale better? ›

Interpolations provide evidence that 5-point Likert scales may not be sensitive enough to record a usability test participant's true evaluation of a system. Seven-point Likert scales appear to be sensitive enough to record a more accurate evaluation of an interface while remaining relatively compact.

Why use a 5 point rating scale? ›

The evidence seems to indicate that five-point Likert scales ensure respondents won't lose interest. Analyzing the different answer choices will also be easier for respondents, eliminating the urge to select middle options or leave items in blank.

What is the 5 star rating questionnaire? ›

A 5 star rating survey is a questionnaire designed to gather customer feedback that uses a five-point rating scale to measure customer satisfaction with a product, service, or any aspect of a business with 1 being the lowest and 5 being the highest score.

What is the classic Likert scale? ›

The classic Likert item uses a 5-point response scale, but you can use 7, 9, or other points, too. (Although someone will have a strong opinion about the “right” number of steps.) Because the response scale is about agreement, be sure items are phrases participants can agree or disagree to.

What are the 5 questions on a survey? ›

These 5 basic questions—how, why, who, when, and what—don't get as much attention as the more popular questions you include in your survey. But they should.

What scale is always, sometimes, never? ›

The Likert Scale doesn't have to state “agree” or “disagree”; dozens of variations are possible on themes like agreement, frequency, quality, and importance. For example: Frequency: Never – Rarely – Sometimes – Always – Often.

What is the scale for strongly agree to strongly disagree? ›

Some likert scales use a seven-point likert scale with 1 being 'Strongly Agree' and 7 being 'Strongly disagree' (or reversed). In the middle, a neutral statement like 'neither agree nor disagree'.

What are 5 ways to gather information? ›

The 5 most common methods for data gathering are, (a) Document reviews (b) Interviews (c) Focus groups (d) Surveys (e) Observation or testing. While each has many possible variations, we will discuss their typical use here.

What are the 5 main questions? ›

As far back as 1913, reporters were taught that the lead should answer these questions:
  • Who?
  • What?
  • When?
  • Where?
  • Why?
  • How?

Is the 5 point Likert scale an interval or ratio? ›

Likert scales are either ordinal or interval, and many psychometricians would argue that they are interval scales because, when well constructed, there is equal distance between each value.

Is a 5 point Likert scale best? ›

With that said, the industry standard 5-point is recommended for a variety of reasons: The 5-point Likert scale is simple to understand and use for survey administrators and respondents alike.

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