The current specsim sky model is based only upon lunar parameters so if the moon is down during twilight, the sky gets simulated as if it were completely dark.
For API, nominally I'd suggest something like
simulator.atmosphere.sun_altitude = -25 * u.deg
where the default value would be some negative number equivalent to the post-twilight current airglow+moon models. sun_altitude>0 should probably generate an exception (or even sun_altitude>-10 * u.deg)
The current specsim sky model is based only upon lunar parameters so if the moon is down during twilight, the sky gets simulated as if it were completely dark.
For API, nominally I'd suggest something like
where the default value would be some negative number equivalent to the post-twilight current airglow+moon models.
sun_altitude>0should probably generate an exception (or evensun_altitude>-10 * u.deg)Some papers for consideration: