Aquarius Prototype in C-130

Description: This image shows the Passive-Active L- and S-band (PALS) sensor in the C-130 aircraft that was used during flights over Monterey Bay, CA in 2000 and 2003. These experiments were conducted over a range of longitudes (37 to 37.4 degrees) and salinity (31 to 35 on the Practical Salinity Scale, PSS, roughly equivalent to parts per thousand). Credit: NASA.