We received a text message from the alarm handler this morning regarding a signal associated with GV16 at the XMID station. After reviewing the signal in question we realized that this signal had fallen to zero on July 20 from a nominal 1ma  (scale of 1-10 mA)

This looks like the normal failure mode of the annulus ion pump power supply and will be investigated and hopefully repaired (depending on replacement parts) next week.

Signal is HVE-MX:GV16_II339