Not consistent time range for the requested spectrogram time profiles

[afbattaglia]

Hi @drhlxiao,

I noticed that there is a mismatch between the input and output time when requesting spectrogram data using Spectrogram.from_sdc. I send you here an example (see screenshot). I requested times from 18:30:00 to 19:30:00 on Sep 30th 2022, but I got, on the same day, 16:30:00 to 17:30:00. The obtained time profiles, anyway, agree with the same time-range in the quicklooks in the website, but, at the wrong requested time.

This is really a great tool to request spectrogram data. It would be useful to have times that agree.

Best,
Andrea