---
name: "downsample-fits"
section: "1"
platform: "linux"
package: "astrometry.net"
version: "0.97+dfsg-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/downsample-fits"
---

# downsample-fits(1)

Scale down a FITS image

## NAME

downsample-fits - Scale down a FITS image

## SYNOPSIS

**downsample-fits** \[options\]  *input-file* *output-file*

## DESCRIPTION

Scale down a FITS image. Use "-" to write to stdout.

## OPTIONS

- **-s** *scale*

  Downsample scale (default: 2): integer

- **-e** *extension*

  Read extension (default: 0)

- **-v**

  Verbose

## AUTHOR

The Astrometry.net team. Principal investigators are David W. Hogg (NYU) and Dustin Lang (CMU).

## SEE ALSO

http://astrometry.net