The pages exist on a state-by-state basis. All pages are updated hourly at ~50 minutes past each hour.

Within each page is the complete HADS definition for each site and each page is a file of plain ASCII text ... suitable for downloading/saving locally and for printing.

Each site definition is one line, or one record within the file.  Each field within the definition is spearated by a vertical bar "|".

The fields represent the following:

GOES NESDIS ID  |  NWSLI  |  DCP Owner  |  State Location  |  Hydrologic Service Area  |  Latitude  |  Longitude  | Initial Daily Transmission  Time (UTC)  | DCP Transmission Interval (Minutes) |
DCP Location Name |  Decoding Modes  | Up to 40 Sets of  Physical Element Information - to include Base Elevation values and / or gage correction values  |

Decoding mode can be S for Selftimed data only,  R for Random data only, or  B for Both Selftimed and Random data.

Latitude and longitude are expressed in degrees  minutes  seconds.

Parameter information are the SHEF Physical Element  (PE) codes,  the recorded time intervals (in minutes) of the data, the offset time for the specific PE  code, any Base Elevation adjustment value applied to the specific PE, and any gage correction value applied to the specific PE.

Example:  A site up-links 15 minute HP data at 0127 UTC and every 4 hours, and a Base Elevation adjustment has been defined at 500 feet.

Its' SHEF parameter fields would be |HP|15|12|500.00|0.00| ... meaning to offset the time of the observed data time back 12 minutes to the nearest quarter hour to indicate that the most recent value of HP from this site was at 0115 UTC and that all other HP values are separated by 15 minute periods. Additionally, a Base Elevation adjustment of 500.00 feet will be added to the observed data value, and in this case the gage correction value is zero (0.00)