Interrogation Sites > Slowly Changing Metadata Operational Period |
The operational time period for a site is tracked at several different levels.
Years Active
A site is considered active if it is expected to collect and submit data in that year or future years. A site that is active, may not be collecting and submitting data at this current point in time, but if it is expected that data will be collected and submitted to PTAGIS in the near future, it remains active. The active status of a site is recorded by a true/false field and tracked to the nearest calendar year.
Calendar Year Operational Period
For each calendar year that a site is active, the operational period for that year is recorded with a Start and End date. These dates are currently maintained by PTAGIS staff by hand based on Event Logs, Timer Tags and data file Open and Close dates.
Interruptions in Operations
Any interruptions in operations that occur during the calendar year operational period are tracked in Event Logs.
Field |
Definition |
Domain |
Active |
If true, site is expected to be operational during normal operational period. If false, site has been decommissioned and will no longer operate. |
True/False |
Operational Period |
The general time period a site is expected to be operational during a year. |
Seasonally, Year Round |
Calendar Year Start Date |
For each Calendar Year where Active = True; the first date of operations during that calendar year. |
datetime |
Calendar Year End Date |
For each Calendar Year where Active = True; the last date of operations during that calendar year |
datetime |
Site Up |
Date site started operations, if site has been inoperable |
datetime |
Site Down |
Date site ceased operations, either due to seasonal nature or due to unplanned equipment failure |
datetime |
Version: 1.09
Published: 1/16/2025