START keyword (RUNSPEC input) and STARTDAT keyword (SMSPEC output)

[tskille]

The START keyword in runspec section seem to have a 2 small issues related to decimal seconds

1) Simulation time vector

This works fine

START
01 'NOV' 2018 12:00:30 /

when extracting simulation times (at report steps only) there is perfect agreement with Eclipse simulator

Date	eclipse	Flow	Diff
2.11.2018	0.4996528	0.4996528	0.00E+00
1.12.2018	29.4996529	29.4996529	0.00E+00

but this doesn't work.

START
01 'NOV' 2018 12:00:30.5 /

From what I can see, the last decimal in seconds is ignored by Flow.

Date	eclipse	Flow	Diff
2.11.2018	0.499647	0.4996528	-5.78E-06
1.12.2018	29.4996471	29.4996529	-5.72E-06

2) Output to STARTDAT vector in summary file SMSPEC

With reference to second example above (01 'NOV' 2018 12:00:30.5)

Flow only output day month and year to STARTDAT keyword in SMSPEC (only 3 values in array).

 'STARTDAT'           3 'INTE'
           1          11        2018

Eclipse output 6 integer values

'STARTDAT'           6 'INTE'
           1          11        2018          12           0    30500000

Notice that 6th integer value should be micro seconds.

Hopefully, It should not be much work to fix this.

[joakim-hove]

The second item has been fixed in libecl: equinor/resdata#642 - the first item is a bigger task to fix.