Identify the two specific IceCube data sets mentioned on the 'Data Releases' page that are available for download. Also, state the general policy regarding when data is released to the scientific community, as outlined on the same page.
Navigate to icecube.wisc.edu. Click on the 'Science' link in the main navigation menu. Click on the 'Data Releases' link in the 'Science' dropdown menu. Identify the two specific data sets available for download under 'Featured Releases'. Locate and extract the general policy regarding when data is released to the scientific community.
Successfully identify and state the two specific downloadable data sets: 'IceCube data from 2008 to 2017 related to analysis of TXS 0506+056' and 'IceCube catalog of alert events up through IceCube-170922A'. Accurately state the data release policy: 'Due to challenging demands on event reconstruction, background rejection and systematic effects, data will be released after the main analyses are completed and results are published by the international IceCube Collaboration.'