PhoSim Instance Catalog Definition

This is the main input file to PhoSim. There are two parts to the instance catalog: the observation parameters and the astrophysical inputs. Neither has any required inputs! PhoSim is fully capable of choosing realistic and self-consistent values, so only use the commands below to specify what is important to your particular simulation.

Observation Parameters

The observation parameters have no required inputs. The values will either be calculated self-consistently from other parameters or chosen from a distribution. 

Standard inputs

The standard inputs are listed below which specify pointing, observation time, camera rotation, filter configuration, and exposure information.  A common method is to choose to either specify ra/dec or alt/az, but not both. However you can choose both as well for certain applications and PhoSim will still function with inconsistent parameters with the MJD/latitude/longitude. Unspecified parameters that cannot be calculated self-consistently are chosen from a distribution.