Calculate Ellrod Index In Python

What the source does

• FilesystemNone observedNo reads or writes in the source
• NetworkNone observedNo outbound calls in the source
• ShellNone observedNo commands run in the source
• DependenciesPinnedNothing floats
• SecretsNone foundNo keys in source

Five audit layers

Gates applied: no behavioural pass.

Audit 0.4.1 · source sha 04e912cff54b · 14 Oct 2026Report an issue or request a re-scan

• PublisherECNU-ICALK GitHub organizationOwner of the repository this skill is read from
• Source folderECNU-ICALK/AutoSkill/SkillBank/ConvSkill/english_gpt3.5_8_GLM4.7/calculate-ellrod-index-in-pythonThe exact folder we audited
• LicenceNot declaredAs the repository states it
• Commit pinned for this verdict04e912cff54bA new audit runs when the source changes
• Repository statusNot archivedLast push 157 days ago
• Sandboxed runNot runSkills are read, not executed; layer L4 is skipped

Its description: Calculates the Ellrod turbulence index using horizontal wind components (u, v) and vertical wind shear based on specific deformation and convergence formulas.

---
id: "387eabeb-439f-4db3-aaf1-7e8c34c2ca09"
name: "Calculate Ellrod Index in Python"
description: "Calculates the Ellrod turbulence index using horizontal wind components (u, v) and vertical wind shear based on specific deformation and convergence formulas."
version: "0.1.0"
tags:
  - "python"
  - "meteorology"
  - "ellrod index"
  - "turbulence"
  - "calculation"
triggers:
  - "calculate Ellrod index"
  - "Ellrod index python script"
  - "calculate turbulence index Ellrod"
  - "python script for Ellrod turbulence"
---

# Calculate Ellrod Index in Python

Calculates the Ellrod turbulence index using horizontal wind components (u, v) and vertical wind shear based on specific deformation and convergence formulas.

## Prompt

# Role & Objective
You are a Python developer specializing in meteorological calculations. Your task is to write a Python script to calculate the Ellrod Index for clear-air turbulence forecasting.

# Operational Rules & Constraints
You must use the specific formulas provided by the user for the calculation:
1. Shearing deformation (DSH) = (dv/dx + du/dy)
2. Stretching deformation (DST) = (du/dx - dv/dy)
3. Total deformation (DEF) = sqrt(DSH^2 + DST^2)
4. Convergence (CVG) = -(du/dx + dv/dy)
5. Vertical wind shear (VWS) = (delta V / delta Z)
6. Ellrod Index = VWS x (DEF + CVG)

Where u and v are horizontal wind components, and d represents the gradient operator.

# Communication & Style Preferences
Provide the code using Python libraries such as numpy for numerical operations and xarray for handling gridded meteorological data (like GFS).

# Anti-Patterns
Do not use statistical correlation methods (e.g., arccos of correlation) for this index; strictly follow the deformation and shear formulas.

## Triggers

- calculate Ellrod index
- Ellrod index python script
- calculate turbulence index Ellrod
- python script for Ellrod turbulence

Excerpt, first 1,885 characters of SKILL.md, verbatim from the audited commit. It is text from someone else’s repository, quoted so you can judge it before your agent reads it.

git clone https://github.com/ECNU-ICALK/AutoSkill
git -C AutoSkill checkout 04e912cff54b

Works in

1. 2026-10-14
   ✓SAFE B 89 / 100

   first audit · source 04e912cff54b

Questions about Calculate Ellrod Index In Python

• github.com/ECNU-ICALK/AutoSkill/tree/main/SkillBank/ConvSkill/en — the audited source at commit 04e912cff54b and every finding aboveObserved · 14 Oct 2026

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