Tech Staff Meeting Notes August 7, 2018

The top priority is always repair of down stations.
NM problem stations
ET problem stations

Duty Table updated October 2017

Priorities

• Station repair
• Annual preventive maintenance
• PIGT, make permanent, the temporary coax splice

News & Highlights

The annual CERI back-to-school lunch will be Friday August 24. Meet in front of house 2 at 11a for the group picture.

Lack of time and resources is putting the TigerShake project on hold. Mitch will instead write a brief proposal on installing an urban strongmotion station at the Liberty Bowl. We won't be installing a 5TD as these are obsolete and installation at new sites is contraindicated. Quickshake on the other hand, could be useful but we need a 1u server to host it.

USGS plans to fund three of our Deferred Maintenance items.

• AQMS upgrade: replace obsolete AQMS systems with new redundant linux/postgresql developed at PNSN.
• New transfer switch for NMAD and new resets for each of the NMSZ nodes
• 4 ET analog to digital conversions (6 channel) for GRBT, ETT, CCRT, and GFM. Three will stay shortperiod and add a sm. GFM will convert to broadband. Hardware will be Centaur DAS, Titan sm, and a Trillium PH for GFM. Hardware orders are in process now. Funding will likely not be in place til late fall. The work will need to be complete by the end of the current coop on Jan 31, 2020.

NC is reviewing the GFM agreement

There will be a GPS week rollover (max week count exceeds 1024) in April 2019. Some of our clocks may be affects. Dave Wilson at ASL is taking the lead to contact vendors for information on expected behavior.

Chris announced his retirement for the end of December 2018.

SIS

SIS areas of responsibility

• NM shortperiod: Dave Steiner
• NM broadband: Dave Steiner
• ET: John Parker
• strongmotion west: Dave Steiner
• strongmotion east: John Parker
• AG network: Chris McGoldrick

XP retirement. Mitch presented a plan to use raspberry shake products from OSOP to replace the National Instruments/Microsoft XP digitizers. The plan includes adding 3-c gps-timed digitizers (e.g. sensorless raspberry shake) for the ET stations, an 8-c gps-timed raspberry jam (DAS) at each ET node. This will free up hardware to use as replacments for NM. Phase II will include stacking multiple raspberry jams at each NM node and retain the analog telemetry. The primary goal is to retire all XP computers and National Instruments Hardware. Star Mountain, after upgrades from USGS Deferred Maintenance, will have only one analog station remaining. That will be the test and if it works, we'll move on to the next node. Total cost should be in the neighborhood of $70k. Mitch will set up a conference call with OSOP to determine what to order for Star Mountain.

NMSZ

NMDown

There are 1 of 7 ISIS3 upgrades remaining (NHAR).

Make permanent repair receive mast for WYBT at HOPT install four 52 watt panel.

I40 Bridge comms.
PC at the Law School is operational with a waveserver, a winston waveserver, and a seedlink ringserver. The plan to do this during the lighting upgrades won't work. We'll do this in the fall with a snooper truck. Each node should be done in a day or less.

The I40 DAS compact flash (CF) cards are a known point of failure in the Granites (2 of 7 have failed so far). We will purchase and configure 5 more and install at the same time as the radio. HD4 with its new CF will also be installed at that time.

NODE Tasks

DBB:

MKTA:

LNXT:

Adjust startup delay in transfer switch settings to give generator time to warm up.

NMAD:

AZTN/HDBR: Need to pull the 200' sensor at the weigh station. Probable water damage. There is no budget for this. Should we try to repair the sensor at MPHB and put it at HDAR2 (MPHB is over two decades old, possibly closer to three)? Should we turn off the HDAR2.*.20 channels until the sensor can be replaced?

CERI:

ETSZ

GFM and DSNC have polarity reversals. These were affected by the ISIS4 bug but had their canisters replaced last year. Jim reports that the data at GFM was fixed after the canister replacement on Nov 15, 2016. See additional notes.
John did a hammer drop test at DSNC on May 2 and the data were discussed at the meeting. The two drops on the north side show opposite polarity when they should be the same but both drops on the south side were down. One way to view that result is 75% show correct polarity so some uncertainty remains. The data also showed the E/W channel is correct and the vertical is reversed. John verified the wiring is correct. Further investigation is needed. Example from Nov 13, 2017
Example from Dec 3, 2017
John will colocate at temp station at DSNC.

Replacement station for GTTN and RBNC needs a new plan. A cell modem would provide more options.

Need to remove antennas, coax, and any other hardware from the tower at Greentop. John and Chris will schedule a trip.

ETDown

STAR Node

Move PMTN due to excessive noise and vandalism. John has a site and sent a draft MOU to Mitch. The University did not ask for changes and asked for the WMA director to sign first, its currently in Nashville for approval. A portable was installed and shows no surprises, it should a good quiet site.

HPNC Node

MTTN Node

GPS

PIGT had a cut coax. A temp repair was made and needs to be made permanent.

All GPS sites need PM visit.

TN Department of Corrections owns 640 acres at SCCF in Clifton in central TN with possible locations for the new GPS station. But none of the potential sites are perfect so Bob needs to visit and decide which spot is best. But Bob is in Buenos Aires so it will need to wait til June. The agreement can be initiated in the interim and TDOC would like to combine this agreement with the one for NWCC which has expired. (Note the seisnet agreement is from 2008 and has no expiration). A suitable site was found but Bob wants to keep looking. Bob is also leaving town again so this is on hold.

AG Network

Z41A has a leaky vault. It will need to be replaced with a CERI style vault.

HHAR needs a bigger solar regulator. The new one should last a year.

FDL

The FDL wiki is here: https://umwiki.memphis.edu/display/FDL/CERI+FDL

MISCELLANEOUS

The seisnet group on umdrive is at http://umdrive.memphis.edu/mwithers/seisnet You will need your uuid and password.

The seisnet wiki is at https://umwiki.memphis.edu/display/CERITech/CERI+Tech You will need your uuid and password.