Science
upGREAT LFA array
The typical atmospheric transmission at 42000 feet for PWV of 15 µm for the LFA array is shown below, superimposed with some of the most important atomic and molecular species.
upGREAT HFA array
The typical atmospheric transmission at 42000 feet for PWV of 10 µm and 20 µm for the HFA array is shown, illustrating the importance of having excellent atmospheric transmission in order to observe the [OI] line.