Astrophotography Stack Signal-to-Noise

How to use this tool

1. Estimate stacked signal-to-noise from source, background, dark current and read noise.
2. Set source rate, background rate, dark current, read noise, exposure time, frame count in the indicated units.
3. Calculate and compare total source signal, stack signal-to-noise.

Try this example

{
  "s": 10,
  "b": 5,
  "d": 0.1,
  "r": 3,
  "t": 60,
  "n": 16
}

Accuracy and scope

Idealized educational model. Enter measured values in the displayed units; real systems may require additional corrections.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.