Pandas timeseries resampling and interpolating together

Question

I have timestamped sensor data. Because of technical details, I get data from the sensors at approximately one minute intervals. The data may look like this:

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Answer 1

d = df.set_index('tstamp')
t = d.index
r = pd.date_range(t.min().date(), periods=24*60, freq='T')

d.reindex(t.union(r)).interpolate('index').ix[r]

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Note, periods=24*60 works on daily data, not on the sample provided in the question. For that sample, periods=6 will work.