NASA Distributed Active Archive Center at National Snow & Ice Data Center (NASA DAAC)
The NSIDC Distributed Active Archive Center (DAAC) processes, archives, documents, and distributes data from NASA's past and current Earth Observing System (EOS) satellites and field measurement programs. The NSIDC DAAC focuses on the study of the cryosphere. The NSIDC DAAC is one of NASA's Earth Observing System Data and Information System (EOSDIS) Data Centers. -https://www.re3data.org/repository/r3d100010109
They are different funding sources than NSIDC, but share the same basic catalog system; the staff are often different, the processes are usually fairly different, and even the type of data archived is different.