w32tm /stripchart - формат ответа. Тоже долго думал, что значит d:

The console application w32tm.exe allows monitoring of the offset of the local time to the time of an internet time server.

The easiest way to do this is from a console window with the following set of parameters:

w32tm /stripchart /computer:time.windows.com /period:120

As a result, the system time and its offset to the time server are dumped to the console every 120 seconds:

Tracking time.windows.com [65.55.21.14.123]

08:38:57 d:+00.0417301s o:+00.1024506s [ * ]

Each line consists of the local time (08:38:57), an internal delay (time difference between the udp package received and udp package sent on the server side, i.e., d:+00.0419394s), the actual offset between the local time and the server time (o:+00.1024506s) and a very basic stripchart of the offset.

Взято тут - https://superuser.com/questions/886002/how-do-i-interpret-w32tm-output-especially-d