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Simulate two Systems images based on Equipment, Acquisition, Light Pollution, Filters and Seeing

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SJK avatar

1.1 Purpose and audience

The simulator answers a question every astrophotographer faces when planning gear: given two complete setups and a target, which one will produce the better image, and by how much? Real-world answers require nights of acquisition, processing, and side-by-side comparison — impractical for screening dozens of configurations. The simulator collapses that experiment to seconds by modeling the entire imaging chain end-to-end and rendering both results next to each other in a single page.

It is aimed at intermediate and advanced amateur astrophotographers comparing telescope/sensor combinations, evaluating filter choices, optimizing acquisition strategies (sub length, total integration time, cooling temperature, guiding quality), or understanding how site quality (seeing, sky darkness) shifts the balance between two setups. It is not a replacement for real imaging — the procedural targets are synthetic — but it isolates and quantifies the technical factors that drive image quality.

1.2 The dual-system concept

The page is built around two columns labeled System A and System B. Each column is an independent, fully configurable imaging stack: telescope (aperture, focal length, obstruction), camera (sensor model from a catalog of ~20 modern CMOS), filter (UV/IR cut, duoband, NB-7nm narrowband), site conditions (Bortle / SQM, seeing, ambient temperature), guiding RMS, and acquisition (sub length, sub count, binning, drizzle).

Every downstream computation — signal, noise, PSF, sampling, SNR, MTF, rendered image, optimal sub length — is computed independently for A and B and displayed side by side. The visual comparison is the core deliverable.

Last version as of post

https://claude.ai/public/artifacts/3fb86e1e-cea2-4759-be34-6b66696772d7

Topic were I keep posting new releases

https://www.cloudynights.com/forums/topic/999730-snr-simulator-generated-by-claude-bortle-sensor-temperature-filters-sub-frame-length-integration-time/page/3/#findComment-14714533

Well written Helpful
Tony Gondola avatar

I’m not sure why this requires AI as all the basic calculations can do done on a spreadsheet. I do find the output rather confusing, maybe too much information?