Preparing Your Data for PixInsight

Introduction

Getting the most from PixInsight starts before you even launch the software. Properly organised files and well‑prepared calibration data set the foundation for a smooth workflow and better results. This guide focuses on how to structure your data, prepare calibration frames, and get everything ready for processing.

Why Preparation Matters

Astrophotography sessions generate dozens or even hundreds of files. Without clear organisation, it’s easy to misplace subs or mis‑match calibration frames, which can cause problems later. A consistent preparation workflow saves time and avoids errors when you begin processing.

Organising Your Data

Use a dedicated folder for each target and date. Inside, create subfolders for every type of frame:

Target_Name_Date/
├── Lights/
├── Darks/
├── Flats/
├── Bias/ (or Dark Flats)
└── Masters/ (for processed outputs later)

Name your files in a consistent, descriptive way. Examples:

• Light_001.CR2
• Dark_001.CR2
• Flat_001.CR2

Consistent structure makes it easier to find and import frames, whether you’re processing now or revisiting the data months later.

📷 [Placeholder: Example folder structure screenshot]

Preparing Calibration Frames

Calibration frames are essential to clean your data and remove sensor and optical artefacts:

• Darks: Remove thermal noise and hot pixels. Capture at the same temperature, gain and exposure as your lights.
• Flats: Correct vignetting and dust motes. Capture using the same optical train without moving focus.
• Bias: Capture at the shortest exposure your camera allows to account for read noise.
• Dark Flats: Used instead of bias frames when calibrating flats at a specific exposure.

Organise these frames into their own folders for each session. Even if you use master calibration frames over multiple nights, keep a clear record of when and how they were captured.

📷 [Placeholder: Illustration showing raw light vs calibrated light]

Backups and Archiving

Keep a copy of your raw lights and calibration frames untouched. Store your master calibration frames in a dedicated “Masters” folder so you can reuse them or reprocess your data in the future. A simple backup strategy ensures your work is safe and easy to revisit.

Summary of Preparation Steps

Next Steps

Once your data is properly organised and calibration frames are ready, you can move on to evaluating and stacking. The next articles in the series will cover screening your subframes for quality, running them through a stacking workflow, and moving into image processing.