Iridium Epoch Halftime Rollover

The purpose of this advisory is to provide information about the Iridium Time (IRT) Epoch Halftime event. This notification is to assure OTT HydroMet customers who use Iridium Time in their applications that the logger will function properly before and after the upcoming halftime event on June 25, 2020 at 13:29.21 UTC. During prior Iridium Halftime transitions, Iridium has noted that some partners were using the IRT in a manner that might cause issues when signed instead of unsigned when 32-bit integer variables are used.  Also note that this is a ‘mid-epoch’ or ‘Halftime’ rollover and not a true ‘full epoch’ rollover.

OTT HydroMet has validated that the current SUTRON Loggers including:

  • SatLink 3
  • XLink 100 / 500
  • 9210
  • IridiumLink
  • Xpert
  • 8310
  • 7310

All handle the ‘halftime transition’ properly as they all use the necessary unsigned 32-bit arithmetic.  There is no action necessary for the customer that is using Iridium with OTT HydroMet loggers.

 

More info on the SUTRON Loggers:

You might also like these articles

5 Reasons Why You Should Visit OTT HydroMet at Meteorological Technology World Expo 2022

Bonjour Paris! After three long years, the world’s meteorological community finally reunites at Meteorological Technology World Expo. As a leading developer and manufacturer of environmental monitoring solutions, OTT HydroMet is...
Meteorology

FAQ: New Connectivity for the OTT ecoLog 1000 & Sutron XLink 100/500

Seamless integration from sensor to software is simplified as connectivity technology becomes more advanced and intuitive. The OTT ecoLog 1000, an all-in-one water level logger and our trusted family of...
Hydrology

Cybersecurity for the Water Sector

A cyberattack can cost an organization millions of dollars, a tarnished reputation, and even lives in the case of water resources.Our latest whitepaper, Cybersecurity for the Water Sector, addresses how...
Hydrology