# \#opsim **URL:** https://www.rubin.community/tag/opsim/34.md [Latest](https://www.rubin.community/latest.md) · [Categories](https://www.rubin.community/categories.md) · [Tags](https://www.rubin.community/tags.md) --- ## [Release of v5.0 simulations](https://www.rubin.community/t/release-of-v5-0-simulations/11114)
**Author:** [@ljones](https://www.rubin.community/u/ljones)\ **Replies:** 13\ **Last updated:** [April 16, 2026, 3:06pm UTC](https://www.rubin.community/t/release-of-v5-0-simulations/11114 "2026-04-16T15:06:39Z")
We have a released a set of v5.0 simulations, in response to early commissioning feedback. In all v5.0 simulations (except the “two\_snap” simulation), exposure times per visit are 1x30s in grizy and 1x38s in u. This is… --- ## [What is the DDF area corresponding to the MAF QSONumberCountsMetric](https://www.rubin.community/t/what-is-the-ddf-area-corresponding-to-the-maf-qsonumbercountsmetric/11122)
**Author:** [@aetviita](https://www.rubin.community/u/aetviita)\ **Replies:** 6\ **Last updated:** [February 13, 2026, 8:31pm UTC](https://www.rubin.community/t/what-is-the-ddf-area-corresponding-to-the-maf-qsonumbercountsmetric/11122 "2026-02-13T20:31:13Z")
Hi, I would like to use the “QSONumberCountsMetric” from the metric analysis framework (MAF) and normalize this number by the sky area. For example, for the COSMOS deep-drilling field (DDF). I find this metric from the… --- ## [Are Opsim database files available at RSP?](https://www.rubin.community/t/are-opsim-database-files-available-at-rsp/10675)
**Author:** [@malanchev](https://www.rubin.community/u/malanchev)\ **Replies:** 2\ **Last updated:** [July 27, 2025, 7:35pm UTC](https://www.rubin.community/t/are-opsim-database-files-available-at-rsp/10675 "2025-07-27T19:35:17Z")
I’m working on a demo notebook for tdastro (LINCC Frameworks’ light curve simulation package), and would like to access both DP1 data for real light curves and OpSim cadence/noise simulations. Currently, I’m fetching OpS… --- ## [Release of V3.4 Simulations](https://www.rubin.community/t/release-of-v3-4-simulations/8548)
**Author:** [@ljones](https://www.rubin.community/u/ljones)\ **Replies:** 12\ **Last updated:** [August 22, 2024, 1:56pm UTC](https://www.rubin.community/t/release-of-v3-4-simulations/8548 "2024-08-22T13:56:21Z")
This announcement summarizes a set of simulations available in a “v3.4” release, which includes minor code updates. Baseline\_v3.4 should be used as the current reference run for these simulations. With our last baseline… --- ## [MAF and Opsim Tutorials](https://www.rubin.community/t/maf-and-opsim-tutorials/8386)
**Author:** [@ljones](https://www.rubin.community/u/ljones)\ **Replies:** 1\ **Last updated:** [March 20, 2024, 5:04pm UTC](https://www.rubin.community/t/maf-and-opsim-tutorials/8386 "2024-03-20T17:04:56Z")
It’s been a while since we made an “introduction to the basics” video tutorial for Opsim (as in, ‘what is an opsim output database’) and MAF, and we did promise some updates. Introduction to Opsim - IntroToOpsim.mp4 In… --- ## [Baseline v3.3 Run released!](https://www.rubin.community/t/baseline-v3-3-run-released/8042)
**Author:** [@ljones](https://www.rubin.community/u/ljones)\ **Replies:** 2\ **Last updated:** [November 6, 2023, 5:59am UTC](https://www.rubin.community/t/baseline-v3-3-run-released/8042 "2023-11-06T05:59:44Z")
I would like to draw your attention to a new simulation of the baseline survey – baseline\_v3.3\_10yrs This illustrates the baseline v3.3 survey strategy, which is pretty much the same as v3.2 (a few minor bug fixes), but… --- ## [Baseline v3.2 Released](https://www.rubin.community/t/baseline-v3-2-released/7877)
**Author:** [@ljones](https://www.rubin.community/u/ljones)\ **Replies:** 4\ **Last updated:** [September 19, 2023, 2:20am UTC](https://www.rubin.community/t/baseline-v3-2-released/7877 "2023-09-19T02:20:31Z")
Announcing the release of a new OpSim output, “baseline\_v3.2\_10yrs.db”, which illustrates the baseline v3.2 survey strategy. The v3.2 survey strategy is an evolution of the v3.0 survey strategy recommendations from the … --- ## [Draft of v3.0 survey strategies (v2.99)](https://www.rubin.community/t/draft-of-v3-0-survey-strategies-v2-99/7159)
**Author:** [@ljones](https://www.rubin.community/u/ljones)\ **Replies:** 14\ **Last updated:** [November 7, 2022, 8:11pm UTC](https://www.rubin.community/t/draft-of-v3-0-survey-strategies-v2-99/7159 "2022-11-07T20:11:26Z")
Dear community, The SCOC is finalizing the Phase 2 recommendations, which are a substantial narrowing of the parameter space of the survey strategy. We are presenting four simulations that attempt to include the current… --- ## [Survey Simulations v2.1 (April 2022)](https://www.rubin.community/t/survey-simulations-v2-1-april-2022/6538)
**Author:** [@ljones](https://www.rubin.community/u/ljones)\ **Replies:** 20\ **Last updated:** [August 26, 2022, 10:37pm UTC](https://www.rubin.community/t/survey-simulations-v2-1-april-2022/6538 "2022-08-26T22:37:28Z")
The v2.1 simulations include a focused dive into Deep Drilling Field scheduling, with a series of different options in ddf scheduling options, as well as refinements on the galactic plane coverage, options regarding ensu… --- ## [Survey Simulations v2.0 release (Nov 2021)](https://www.rubin.community/t/survey-simulations-v2-0-release-nov-2021/6059)
**Author:** [@ljones](https://www.rubin.community/u/ljones)\ **Replies:** 1\ **Last updated:** [November 10, 2021, 12:19am UTC](https://www.rubin.community/t/survey-simulations-v2-0-release-nov-2021/6059 "2021-11-10T00:19:24Z")
I’m happy to announce the release of our v2.0 survey strategy simulations. These simulations follow the SCOC Phase 1.0 recommendations (see PSTN-053) for an update to the previous baseline – this involves a notable upda… --- ## [Nvisits vs. Area trades](https://www.rubin.community/t/nvisits-vs-area-trades/4847)
**Author:** [@ljones](https://www.rubin.community/u/ljones)\ **Replies:** 2\ **Last updated:** [May 22, 2021, 12:10am UTC](https://www.rubin.community/t/nvisits-vs-area-trades/4847 "2021-05-22T00:10:42Z")
The first question the SCOC is asking everyone to address in the Cadence Notes is: Q1: Are there any science drivers that would strongly argue for, or against, increasing the WFD footprint from 18,000 sq. deg. to 20,00… --- ## [Survey Simulations v1.7.1 release (April 2021)](https://www.rubin.community/t/survey-simulations-v1-7-1-release-april-2021/4865)
**Author:** [@ljones](https://www.rubin.community/u/ljones)\ **Replies:** 11\ **Last updated:** [April 10, 2021, 6:53am UTC](https://www.rubin.community/t/survey-simulations-v1-7-1-release-april-2021/4865 "2021-04-10T06:53:38Z")
In response to a request for additional simulations from the TVS and SMLV collaborations approved by the SCOC, we have a few additional simulations that you may optionally consider when submitting your Cadence Notes. I k… --- ## [SMWLV-TVS observing strategy hack day 5, Thurs Apr 08th 10:00-15:00 EDT](https://www.rubin.community/t/smwlv-tvs-observing-strategy-hack-day-5-thurs-apr-08th-1000-edt/4868)
**Author:** [@willclarkson](https://www.rubin.community/u/willclarkson)\ **Replies:** 0\ **Last updated:** [April 7, 2021, 3:18pm UTC](https://www.rubin.community/t/smwlv-tvs-observing-strategy-hack-day-5-thurs-apr-08th-1000-edt/4868 "2021-04-07T15:18:51Z")
Hi all - our fifth SMWLV-TVS hack day will take place Thursday April 8th, 10:00-15:00 EDT. The format will be similar to previous hack days. We are additionally planning a hack day for Tuesday April 13th. A few notes: … --- ## [Survey Simulations v1.7 release (January 2021)](https://www.rubin.community/t/survey-simulations-v1-7-release-january-2021/4660)
**Author:** [@yoachim](https://www.rubin.community/u/yoachim)\ **Replies:** 5\ **Last updated:** [March 30, 2021, 4:39pm UTC](https://www.rubin.community/t/survey-simulations-v1-7-release-january-2021/4660 "2021-03-30T16:39:44Z")
We are pleased to announce the release of v1.7 of the survey strategy simulations. For general information on the survey simulations, see our PSTN-051 document. PSTN-051 will be updated shortly to include more in-depth a… --- ## [Pairs in the same filter or different filters](https://www.rubin.community/t/pairs-in-the-same-filter-or-different-filters/4761)
**Author:** [@ljones](https://www.rubin.community/u/ljones)\ **Replies:** 0\ **Last updated:** [February 26, 2021, 2:02am UTC](https://www.rubin.community/t/pairs-in-the-same-filter-or-different-filters/4761 "2021-02-26T02:02:25Z")
In section 6.2 of PSTN-051, we present a comparison of the impact of taking visit pairs in the same filter versus different filters. I feel like I’ve seen some confusion about this, though, so here’s a summary: In the … --- ## [Family: Third Observation (third\_obs)](https://www.rubin.community/t/family-third-observation-third-obs/4707)
**Author:** [@ljones](https://www.rubin.community/u/ljones)\ **Replies:** 4\ **Last updated:** [February 23, 2021, 11:57pm UTC](https://www.rubin.community/t/family-third-observation-third-obs/4707 "2021-02-23T23:57:46Z")
A spotlight post for the third\_obs family (from the v1.5 runs). In this family, we implemented a strategy with the goal of adding a third visit for fields which had already acquired a pair of visits earlier in the night… --- ## [FBS 1.5 release (May Update - Bonus FBS 1.5 release)](https://www.rubin.community/t/fbs-1-5-release-may-update-bonus-fbs-1-5-release/4139)
**Author:** [@ljones](https://www.rubin.community/u/ljones)\ **Replies:** 0\ **Last updated:** [May 7, 2020, 11:16pm UTC](https://www.rubin.community/t/fbs-1-5-release-may-update-bonus-fbs-1-5-release/4139 "2020-05-07T23:16:53Z")
Dear survey enthusiasts, We had previously thought the FBS 1.4 set of runs would be the last ‘big’ set with families/individual aspect survey strategy variations, but it turns out we were wrong – but for a positive reas… --- ## [FBS 1.6 release (August 2020)](https://www.rubin.community/t/fbs-1-6-release-august-2020/4423)
**Author:** [@ljones](https://www.rubin.community/u/ljones)\ **Replies:** 0\ **Last updated:** [September 28, 2020, 11:03pm UTC](https://www.rubin.community/t/fbs-1-6-release-august-2020/4423 "2020-09-28T23:03:31Z")
Dear survey strategy enthusiasts - a belated run release update. The FBS 1.6 release is a somewhat mixed set, part of which could really be considered part of or replacements for runs from the 1.5 release, and part of w… --- ## [How many visits per night does a pointing receive? (evaluation)](https://www.rubin.community/t/how-many-visits-per-night-does-a-pointing-receive-evaluation/4708)
**Author:** [@ljones](https://www.rubin.community/u/ljones)\ **Replies:** 0\ **Last updated:** [February 11, 2021, 10:01pm UTC](https://www.rubin.community/t/how-many-visits-per-night-does-a-pointing-receive-evaluation/4708 "2021-02-11T22:01:29Z")
A quick comment on the number of visits per night, per pointing: The scheduler, in general, is programmed to get pairs of visits in each night, for each pointing. These visits are paired in various filters: u-g, u-r, g… --- ## [Visualizing OpSim output](https://www.rubin.community/t/visualizing-opsim-output/173)
**Author:** [@yoachim](https://www.rubin.community/u/yoachim)\ **Replies:** 17\ **Last updated:** [September 25, 2020, 7:22pm UTC](https://www.rubin.community/t/visualizing-opsim-output/173 "2020-09-25T19:22:14Z")
I started playing with a new way to visualize OpSim runs. Here’s a plot showing how many times a spot in the sky has been observed as a function of time. Normally, we just make Aitoff plots of various values at the end… --- ## [What is meant by the term "rolling cadence"?](https://www.rubin.community/t/what-is-meant-by-the-term-rolling-cadence/3375)
**Author:** [@rstreet](https://www.rubin.community/u/rstreet)\ **Replies:** 6\ **Last updated:** [November 2, 2018, 6:06pm UTC](https://www.rubin.community/t/what-is-meant-by-the-term-rolling-cadence/3375 "2018-11-02T18:06:37Z")
While considering trade-offs between different survey strategies, consideration is being given to the pros and cons of a rolling cadence. However, different people seemed to have different concepts of exactly what this … --- ## [Deep drilling whitepapers](https://www.rubin.community/t/deep-drilling-whitepapers/732)
**Author:** [@ljones](https://www.rubin.community/u/ljones)\ **Replies:** 11\ **Last updated:** [August 31, 2018, 10:43pm UTC](https://www.rubin.community/t/deep-drilling-whitepapers/732 "2018-08-31T22:43:10Z")
I keep losing the links to the deep drilling white papers that were submitted by each of the science collaborations in 2011, and that played a significant role in shaping the current deep drilling strategy in Opsim. I a… --- ## [New OpSIM run proposals OK before the end of 2017?](https://www.rubin.community/t/new-opsim-run-proposals-ok-before-the-end-of-2017/2177)
**Author:** [@willclarkson](https://www.rubin.community/u/willclarkson)\ **Replies:** 1\ **Last updated:** [August 15, 2017, 12:00am UTC](https://www.rubin.community/t/new-opsim-run-proposals-ok-before-the-end-of-2017/2177 "2017-08-15T00:00:58Z")
Hi @ivezic - three questions regarding the interaction between community proposals for new OpSim runs and the development of the observing strategy: If new OpSim proposals are submitted from the Community before Dece… --- ## [Candidate Reference Run, minion\_1016](https://www.rubin.community/t/candidate-reference-run-minion-1016/868)
**Author:** [@cathypetry](https://www.rubin.community/u/cathypetry)\ **Replies:** 1\ **Last updated:** [August 12, 2016, 6:55pm UTC](https://www.rubin.community/t/candidate-reference-run-minion-1016/868 "2016-08-12T18:55:43Z")
A new candidate Reference Run, minion\_1016, is being proposed to the LSST Change Control Board as a replacement for the current Reference Run, opsim3.61. An announcement will be issued here when it is approved. The pu… --- ## [Viewing the configuration files for a particular opsim run](https://www.rubin.community/t/viewing-the-configuration-files-for-a-particular-opsim-run/755)
**Author:** [@ljones](https://www.rubin.community/u/ljones)\ **Replies:** 0\ **Last updated:** [May 4, 2016, 10:08pm UTC](https://www.rubin.community/t/viewing-the-configuration-files-for-a-particular-opsim-run/755 "2016-05-04T22:08:45Z")
Starting at v3.3.6, Opsim now uses configuration files (the files that tell you what the survey was trying to do, in terms of proposals, exposure times, filters, number of requested visits, etc.) that are stored in a git… --- ## [New Opsim Run: Galactic Plane observed at WFD cadence](https://www.rubin.community/t/new-opsim-run-galactic-plane-observed-at-wfd-cadence/699)
**Author:** [@ljones](https://www.rubin.community/u/ljones)\ **Replies:** 0\ **Last updated:** [April 19, 2016, 11:52pm UTC](https://www.rubin.community/t/new-opsim-run-galactic-plane-observed-at-wfd-cadence/699 "2016-04-19T23:52:22Z")
In response to a request from the Observing Cadences working group (https://github.com/LSSTScienceCollaborations/ObservingStrategy/blob/master/opsim/Proposal\_GP.md) a simulated LSST survey where the galactic plane was ob… --- ## [New Observing Cadences available](https://www.rubin.community/t/new-observing-cadences-available/698)
**Author:** [@ljones](https://www.rubin.community/u/ljones)\ **Replies:** 0\ **Last updated:** [April 19, 2016, 11:47pm UTC](https://www.rubin.community/t/new-observing-cadences-available/698 "2016-04-19T23:47:04Z")
The standard "Tier 1" observing cadences, a set first run for the August 2015 All Hands Meeting, have been regenerated (and some additional runs created) using Opsim v3.3.5. The runs are listed, along with download link… --- ## [Scheduler Requirements Document Discussion](https://www.rubin.community/t/scheduler-requirements-document-discussion/540)
**Author:** [@connolly](https://www.rubin.community/u/connolly)\ **Replies:** 3\ **Last updated:** [February 23, 2016, 6:43pm UTC](https://www.rubin.community/t/scheduler-requirements-document-discussion/540 "2016-02-23T18:43:16Z")
In preparation for the JTM session on the scheduler requirements document the latest version is attached. To help make the session as efficient as possible please use the comments on this topic to indicate specific requi… --- ## [Comparing ESO sky model to current OpSim sky values](https://www.rubin.community/t/comparing-eso-sky-model-to-current-opsim-sky-values/489)
**Author:** [@yoachim](https://www.rubin.community/u/yoachim)\ **Replies:** 3\ **Last updated:** [January 16, 2016, 12:11am UTC](https://www.rubin.community/t/comparing-eso-sky-model-to-current-opsim-sky-values/489 "2016-01-16T00:11:13Z")
I ran through ewok\_1004 and compared the current sky brightness values to the ones calculated from the ESO model. It looks like ESO is predicting significantly fainter sky values. I think the outliers in the lower righ…