The raw sub-hourly data for gauges maintained by the UHSLC are not archived, primarily because the UHSLC is not funded to do so. Each sensor has multiple sensors and some sensors can have multiple recording mechanisms. The cross-checking of the data streams is an essential part of quality-control, and the highest-frequency data requires expert attention to make a scientifically-valid product. Locally, the raw data within the UHSLC global network are backed up for short-term preservation, but it is not intended as a posterity archive. It is unconfirmed how other international agencies handle the archiving of their raw data streams. The NOAA NGDC (www.ngdc.noaa.gov)
does archive select high frequency data sections pertaining to specific events (e.g., tsunamis). Discussion at GLOSS meetings has suggested the GLOSS IOC Sea Level Monitoring Facility as the most logical repository for raw data streams. The Monitoring Facility does back-up these streams, but as of yet, there is no official posterity archive for the raw data.