---
name: "wcs-pv2sip"
section: "1"
platform: "linux"
package: "astrometry.net"
version: "0.97+dfsg-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/wcs-pv2sip"
---

# wcs-pv2sip(1)

Convert TPV WCS headers to SIP distortion headers

## NAME

wcs-pv2sip - Convert TPV WCS headers to SIP distortion headers

## SYNOPSIS

**wcs-pv2sip** \[options\] *input-wcs* *output-wcs*

## OPTIONS

- **-o** *order*

  SIP polynomial order to fit (default: 5)

- **-e** *ext*

  FITS HDU number to read WCS from (default 0 = primary)

- **-S**

  Do NOT do the wcs\_shift thing

- **-s**

  Treat input as Scamp .head file

- **-t**

  Override the CTYPE\* cards in the WCS header, and assume they are TAN.

- **-v**

  \+verboseness

- **-W** *int*

  Set the IMAGEW in the output file

- **-H** *int*

  Set the IMAGEH in the output file

- **-x** *num*

  x-low (default: 1)

- **-y** *num*

  y-low (default: 1)

- **-X** *num*

  x-high (default: image width)

- **-Y** *num*

  y-high (default: image width)

- **-a** *size*

  Set the pixel values used to compute the distortion polynomials with (default: closest to 100 yielding whole number of steps)

## AUTHOR

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

## SEE ALSO

http://astrometry.net