During Amavasai (new moon) and masa pirappu (beginning of a new month), is tharpanam performed before or after Tiruaradhanam?

On such days, Tiruaradhanam should precede tharpanam as deva karyam should be performed first followed by pitru karyam.
Notes:
On occasions, the onset of a new month is earlier. On such days tharpanam precedes Tiruaradhanam. Tiruaradhanam cannot be performed in the early hours. After performing masa pirappu tharpanam, Tiruaradhanam is done at an appropriate time. Elders also follow such practices.