Argo Data Monitor

VS Code extension for visualizing Argo float ocean monitoring data — depth & velocity time-series charts.

Features

• 🗂️ TreeView Navigation — browse devices → dates → profiles in a three-level hierarchy
• 📈 Dual Y-Axis Chart — depth (left) and vertical velocity (right) plotted against time
• ⚡ High Performance — handles 100k+ data points with uPlot's GPU-grade rendering
• 🧵 Worker Thread — CSV parsing & downsampling run off the UI thread, zero lag
• 🔍 Zoom & Pan — interactive time-range exploration with crosshair tooltip
• 💾 Weighted LRU Cache — 5 profiles / 64 MB in-memory, fast profile switching
• 📁 Auto-Discovery — automatically detects Argo data directories in your workspace

Quick Start

1. Open a folder containing Argo device data (or set argoMonitor.dataRoot in settings).
2. The Argo Devices view appears in the Explorer sidebar.
3. Expand a device → date → click a profile to open the chart.

Data Directory Structure

{dataRoot}/
  {deviceId}/              # numeric folder, e.g. 6001
    {date}/                 # 6-digit YYMMDD, e.g. 260716
      CSV/
        Argo2_{date}_{profileNum}_level_type2_interval1.csv
      DAT/
      TXT/
      NC/

Settings

If left empty, the extension auto-detects the data root from your workspace folders.

Chart Controls

Technical Details

Downsampling Algorithm

Min/Max pixel-bucket downsampling preserves signal extrema:

1. Binary search the visible time range
2. Partition into pixel-width buckets
3. Capture min & max for both depth and velocity per bucket
4. Merge, sort, deduplicate extreme indices
5. Preserve boundary points and NaN gap markers
6. Output ≈ 2–4× chart width data points

Performance

Requirements

• VS Code ^1.90.0

Known Limitations (MVP)

• Depth and velocity only — temperature, salinity, and sensor diagnostics planned for future releases
• No multi-profile overlay yet
• No automatic file watching (manual refresh via toolbar button)
• In-memory cache only (disk cache planned)

License

MIT