Updates to this study will be placed at this web site. In addition, during each of these nights a balloon launch from Cerro Pachon will take place to measure the variations of the temperature difference between two probes on the balloon. Stay tuned to this web page for updates to this study. The brightness of a sodium laser guide star depends linearly on the sodium column density above the sites. The seasonal variations appear to be similiar in that they peak in the respective winter months.
Sporadic layers appear and move on timescales as short as minutes.
Below are listed a few of the studies which have been done at or near the two Gemini Telescope sites. Feel free to send us more references to add to this list. Observatory Mauna Kea Lidar Papen et al. Lidar Simonich et al. Lidar Clemesha et al.