NovaStar Data / Alarms
Introduction
Alarms indicate cases where data values have exceeded critical values as defined by alarm triggers.
Alarms in NovaStar
NovaStar provides features for detecting critical conditions, recording alarms, and sending notifications. These features are complex and require integration of various technologies.
The NovaStar design uses alarm triggers to define critical conditions, which generally are upper or lower limit, or rate of rise or fall. Some criteria are localized, such as water level rise at a stream gage, whereas other criteria may be regional, such as precipitation amount and duration.
Alarm triggers are associated with a NovaScore value, which is a qualitative numerical level indicating severity of the condition. Each point's data record is assigned a NovaScore, which can then be used for analysis, display, and decisions. See the NovaScore documentation for more information.
Data web services allow alarms to be queried as time series, so that they can be analyzed, displayed, and used for decisions.
Services
The following services are related to alarms:
- alarms - historical record of alarms that have been triggered
- alarmTriggers - conditions that result in an alarm
- novascores - list of severity levels