ESO Archive Frequently Asked Questions
Which information can I find in a Night Log?
The Night Log of a given observing night contains any information and comments related to issues occurred during that night. It also reports the ambient conditions measured during the observation.
Below is an example of a Night Log report:
Nightlog information for file UVES.2002-06-16T08:51:25.171
OB grade: C)Out of specs - Repeat
Comment: 2002-07-06: reclassified because of red CCD problems
Red wavelength calibration;
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OB-id:
Requested Fulfilled?
Seeing: 1.00 Yes
Airmass: 1.50 Yes
Moon Distance: 90 Yes
Sky Transparency: 2CLR Yes
Strehl Ratio: N/A N/A
Please find more information about OB grade here.