A study performed during 2013 showed that the light curve changed significantly during the observation period, adding to the difficulty.
22.
The trick to get more effective degrees of freedom out of the available dataset was to use overlapping observation periods.
23.
In the new study, Schnyder added 348 patients and extended the follow-up observation period from six months to one year.
24.
When the observation period has concluded, the assessor should reexamine each check sheet and form a composite of the defect locations.
25.
Each SWUIS observation period lasted approximately 3 hours, and garnered approximately 10 ^ 5 images in up to 7 filter bandpasses.
26.
That would mean each observation period would be rather short on Hubble, as it's orbital period around Earth is short .)
27.
The flares increased the combined magnitude of the pair by more than 0.05 for more than half of this observation period.
28.
Dentures, some have theorized, will trap alcohol, although experiments have shown no difference if the normal 15 minute observation period is observed.
29.
In 2005 the Liga IberoAmericana De Astronom�a noted meteors from this stream every night during the observation period of March 8 17.
30.
The ALFRED web site states that In general, economic data for past observation periods are revised as more accurate estimates become available.