DDF Observations under the Ocean Observing Strategy

Science Survey Strategy
#1

Given the implementation of the Ocean observing strategy for DDF, is there a table or a formula that I can use to determine the number of visits/exposures for each of the different DDF mini-surveys? In this question, I am assuming that Ocean went live on June 30 at the start of LSST.

I am looking at what I assume are observations from ELAISS1 based upon the coordinates. From June 26 until today, ALeRCE is showing detections of 32, 26, 29, 24, 20, 20, 23, 25, 26, 27, 20 and 24 for the 12 objects that I am reviewing. I may be trying to create a rule where there may be no rule as of yet. Just appreciate hearing if this seems right.

#2

For the DDFs, we actually have them scheduled out for the entire 10-year survey ahead of time. It sounds like that info would be helpful for quite a few people who are writing proposals about the deep fields, so we’ll probably try to make the DDF schedule easy to find and properly documented.

If you don’t want to wait for that, you can find the DDF schedule yourself by first checking this line to see what file name is being used on the telescope: https://github.com/lsst-ts/ts_config_scheduler/blob/a63279c5233af6981251cc9363d6d9d2f2960797/Scheduler/feature_scheduler/maintel/fbs_config_lsst_survey.py#L193
Then downloading and unzipping this file: https://s3df.slac.stanford.edu/data/rubin/sim-data/rubin_sim_data/scheduler_2026_07_23.tgz
And find the save file that has the matching hash name. That’s a numpy save file that you can load and it will have an array with all the planned observations.

Big big caveat that of course our survey strategy is ever evolving, so until we make something more official you should assume that DDF schedule above is prone to change without warning.