# Omitting a warp when making a coadd

**URL:** <https://www.rubin.community/t/omitting-a-warp-when-making-a-coadd/4695>\
**Category:** Support\
**Created:** [February 9, 2021, 6:04pm UTC](https://www.rubin.community/t/omitting-a-warp-when-making-a-coadd/4695 "2021-02-09T18:04:02Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ih64](https://sea2.discourse-cdn.com/flex002/user_avatar/www.rubin.community/ih64/32/528_2.png) [@ih64](https://www.rubin.community/u/ih64)\
**Post date:** [February 9, 2021, 6:04pm UTC](https://www.rubin.community/t/omitting-a-warp-when-making-a-coadd/4695/1 "2021-02-09T18:04:02Z")

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Hello all,

I would like to remake a coadd with compareWarp, but this time around omit one of the warps that would otherwise go into making the coadd (it has a satellite streak in it, and we are curious to see what the effect is of leaving it out entirely). Is there a straightforward way of doing this using command line tasks? I have the dataId of the warp I want to omit on hand.

thank you!  
Imran

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**Author:** ![mrawls](https://sea2.discourse-cdn.com/flex002/user_avatar/www.rubin.community/mrawls/32/2810_2.png) [@mrawls](https://www.rubin.community/u/mrawls)\
**Post date:** [February 9, 2021, 6:48pm UTC](https://www.rubin.community/t/omitting-a-warp-when-making-a-coadd/4695/2 "2021-02-09T18:48:32Z")

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Are you working in Gen2 or Gen3? In Gen2, this ought to be straightforward.

When running `assembleCoadd.py`, you can include a visit list in `--selectId` that omits the one you want to skip. The `selectId` is for narrowing down what input warps to use (visit, detector/ccd) and the `id` is for specifying what parts of the sky (tract, patch) to consider.

For example, to skip visit 10, you’d do something like `assembleCoadd.py REPO --rerun RERUN --warpCompareCoadd --selectId visit=7^8^9^11^12^13 --id tract=0 patch=0,0^0,1^1,0^1,1`

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<div class="post-metadata">

**Author:** ![ih64](https://sea2.discourse-cdn.com/flex002/user_avatar/www.rubin.community/ih64/32/528_2.png) [@ih64](https://www.rubin.community/u/ih64)\
**Post date:** [February 10, 2021, 1:25am UTC](https://www.rubin.community/t/omitting-a-warp-when-making-a-coadd/4695/3 "2021-02-10T01:25:12Z")

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Thanks, it worked perfectly!