drphilmarshall
commented
9 years ago Won't some fields - the ones that are up during the time of the data release, the turn of the year - be observed for 11 seasons? eg, I'm thinking of a field with a 4-month continuous observing season that starts being observed in July, and gets 2 months data before the end of the year that is released as DR1. It then gets two more months in September and October, but these will be released in DR2 (along with the following July and August's data). In each data release, then, there are 4 months of data for this field: DR1 contains September and October, and then this following July and August. This first year should be counted as 2 seasons though, separated (and defined) by the usual long season gap. In year 10, there's another short 2-month season in July and August, and then LSST is shut down. I make that 11 seasons total: two short seasons and 9 long ones. Only some ( about a third?) of the fields should show this behavior.
On Thu, Jul 9, 2015 at 10:02 PM, humnaawan notifications@github.com wrote:
When I run this stacker on OpSim 2.168 data, I get a total of 12 seasons assigned to the visits for 10 years, with a considerable number of observations in the 12th season. Looking closely at the code, it appears that there’s a 6-month subtraction issue: since using sunRA equinox already subtracts 6 months off of objectRA equinox, the 6 month subtraction in line 53 is repetitive. However, removing the subtraction in line 53 doesn’t fix the issue.
To check whether my understanding is correct, I have used objectRA to determine the seasons, which gives me 11 seasons (I am wrapping the first and 11th one to get a total of 10 seasons). I am guessing there’s more of a subtle bug in the sunRA code that I have not been able to discover so far.
— Reply to this email directly or view it on GitHub https://github.com/LSST-nonproject/sims_maf_contrib/issues/14.
rhiannonlynne
humnaawan
When I run this stacker on OpSim 2.168 data, I get a total of 12 seasons assigned to the visits for 10 years, with a considerable number of observations in the 12th season. Looking closely at the code, it appears that there’s a 6-month subtraction issue: since using sunRA equinox already subtracts 6 months off of objectRA equinox, the 6 month subtraction in line 53 is repetitive. However, removing the subtraction in line 53 doesn’t fix the issue.
To check whether my understanding is correct, I have used objectRA to determine the seasons, which gives me 11 seasons (I am wrapping the first and 11th one to get a total of 10 seasons). I am guessing there’s more of a subtle bug in the sunRA code that I have not been able to discover so far.