What does demo mean time=0 when setting initial inputs and input_forcings, and time=1 when setting all_forcings ?

[weatherforecasterwhai]

Hi,

I was just using 2 time as input: ### t0, t1,for example.
After time shift for sea-ice cover and SST, I still got two times (t0,t1).

Then,
inputs = model.inputs_from_xarray(eval_era5.isel(time=0))
input_forcings = model.forcings_from_xarray(eval_era5.isel(time=0))
1.Does the demo time=0, stands for t-1, and time=1 stands for t0 ?
Because, when printing "eval_era5.head(time=0)" got 0 B and "eval_era5.head(time=1)" stands for t0.
So, inputs = model.inputs_from_xarray(eval_era5.isel(time=0)), sends out error:

"not all values found in index 'time'"

# use persistence for forcing variables (SST and sea ice cover)
all_forcings = model.forcings_from_xarray(eval_era5.head(time=1))
Here, demo says all_forcings (time=1) stands for SST and sea ice cover. I think it's at time t0.
But, what does input_forcings (time=0) stands for?
I think input_forcings (time=0) should also be SST and sea ice cover at time t-1.

So, what's the difference between all_forcings and input_forcing?
Does neuralgcm need two times of SST and sea ice cover as forcing for input?

Hope I said it clear. Thank you!

[weatherforecasterwhai]

Fix it by a friend.