I'm confused with time_reference

[changjw214]

Hello friends...

I'm dealing with tide phase, so I wanna adjust time reference.
There are three values related with time reference & tide in 'ocean.in' file.
In my case, tide has reference time 2014-12-01
and Model simulation start time has same date.

So I'll put Dstart = 16993(Modified julian date'2014-12-01')
tide_start = 16993
time_ref = -2.0(default special values)
Is it Okay??
When I set time_ref=-2, should I put the 'units' attribute in my initial condition file?

[wilkin]

This post might help
viewtopic.php?f=14&t=965&hilit=tide_start#p3342
and the WikiROMS page it links to
https://www.myroms.org/wiki/tide_start