Tech Staff Meeting Notes June 5, 2017

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

Duty Table updated June 2014


News & Highlights

Arch asked about updating the signpost outside the middle house. Mitch will look into it.

We continued the discussion on ISIS3 upgrades. The raspberry shake use ntp for timing which makes accuracy good to about 10 ms which is not good enough for our purposes. Jim contacted Francis, his Argentian colleague who has developed a raspberry pi based 12-bit das with GPS timing attached to 3-c L-28. Its possible we could link VLF with Francis to come up with a package that suits our needs. All sw should be open source. A 16 or 24-bit DAS is preferred. Dave mentioned that there is a vendor who has a digital 216MHz radio which would help immenseley with telemetry (in ET too). This solution also needs software development to provide a real-time link to earthworm.

Eric Haug will be meeting with James on June 14 to get an intro to SIS. The goal is to equipment him with knowledge and tools to do the initial load of his stations, then keep them updated.


SIS is fully operational for Memphis stations. Now each person needs to keep it up to date for equipment for which they are responsible (from the June 2014 Duty Table):

Make sure Mitch gets an email for any equipment change that will generate a SIS update. Philip Crotwell has an app that let's you do updates on your phone.


PC's at mttn and hpnc have "puffy caps" and need to be replaced.


Data taken from:


Misc Problems
CPAR -spikes
TYAR - "
EPRM - "
MPH - ?


AR state funding for the 3 added stations was not approved. They're now operating on a shoe-string budget. Misc Problems
CCAR.HNE - drifting
X40A - see image
Z41A - does not stay centered

Low solar dropouts have several different sources though common problem is an extraordinarily overcast January. Other factors include mis-wiring, ISIS3 xmiters draw more power (so need more solar), AGM's have problems with low power charge, etc. Jim's spreadsheet shows 9 stations that need an upgrade, 10 on the edge, and 13 that need to be checked.
Need to accomplish this task as we visit each station for the annual PM.

Need a site for MORT2.

There was an email discussion on the history of OXF which led to digging up the MOU from 1993. Mitch checked with Dave Wilson at ASL and it may be possible to replace the MOU, which is endorsed at a fairly high level within USGS, with a "station agreement" which is less formal.

I40 Bridge comms.
The Afar radios from Jim Smith work well. We'll need two access points at the Law School connected to a pair on the bridge. The DAS's on the bridge will communicate with each other under the bridge. The access points automatically balance the load between the two. Jim Smith started the process to make the purchase.

Message from Jim Smith re: bridge comm gear from NSMP:

Just letting you know I've ordered all the stuff, and am going to get a quote from AFAR for the Radios. Once I get the Ubiquitis and antennas you listed I'll ship off to you. Should go out by end of next week. Radios will take a while and may come in groups .

The spectre routers have a relatively short character limit for url's. But when you change a config using the web interface with the obsidians, they try to resend the entire configuration using a url and its gets truncated when coupled with a spectre router. So make sure the configs are correct because it requires a site visit to change them.

NODE Tasks

All nodes are due a firmware upgrade that will sufficiently change things such that the the initial upgrade and configure should be done at CERI, then swap hardware at the node. This will be done as machines are replaced.



Replace siding on equipment hut.

Property at MKTA node will possibly be sold. Chris is looking into to it to make sure we can retain our presence. Growth of antenna farm on top of the silos suggests we're safe.

Getting interference at the node causing spikes in CPAR, LVAR, LRAR, and TYAR.



Add a firewall rule to allow local access to tower hardware.

AZTN/HDBR: Need to pull the 200' sensor at the weigh station. Probable water damage.


Liebert is not maintaining temp. A ticket has been issued in WORQS.

Flooding in the expansion space has become a problem. A Workorder was submitted and P-plant engineers were on-site to assess the problem. The most likely solution will be a retention wall and removal of material to make the foundation above grave. There are several open work orders. Jim will make a prioritized list and speak with zone supervisor.


Replacement station for GTTN and RBNC being evaluated and permissioned for Southern Highlands Science Learning Center at Purchase Knob (MaggieValley), a part of the Great Smoky Mountains National Park. After installing the compressor isolation hardware the noise study showed no noise from it, but the site did not have hard rock and the signal was very poor. John will send coordinates to Mitch to re-evaluate whether this station can be located elsewhere.


Data taken from: /dat1/seisadm/Working/ET/201706/20170602_140810_MAN

Misc Problems
DYTN.EHN - see image
CPCT.HN* - see image
FPAL.HHE - drifting


I will update it after we know what's up with ATTN, CSTN and SHTN.

DYTN has regular tick marks. Reftek problem?

CPCT had the RT147 replaced but still has problems. ASL placed an order for the cable. Will put the cable in armored flex. Should do the bb cable at the same time.

GMG has had a power upgrade, new batteries, new solar contoller, and better surge suppression. And it still went down on 1/18. James can get to the radio at the station which is on a separate power feed than the reftek. Jim will send a new BC10 and John will investigate.

John's updated todo list .


Improve RCGA AC power and perform maintenance work on shed.

Move PMTN due to excessive noise and vandalism. The trees at Lone Mountian are too tall to get a signal out. Looking for an alternate site.


High Peak node is complete. Will re-evaluate next month whether or not to keep the cell modem in reserve, or decomission it.

GFM2 site is no good. John has ideas for an alternative.


WMTN pit needs to be moved due to erosion.

CPRT comm reconfig. John says, "CPRT is going through the Senior Center at Corryton (cort). We removed everything from svfd an everything but what is on the tower at gttn. cort is indeed using dynamic addressing but data is flowing. Greg Hill the director at the senior center is supposed to be contacting his IT person to see what can be done. I left a message for Greg last week but still haven't heard back. I want to get Greg's IT guy in direct contact with either Steve or James so they can figure it all out."


CVMS has intermittent connection problems with wireless. Its hardwired for now but the wireless needs to be replaced to preserve electical isolation between the building and vault.

The new GPS station is delayed due to the PI nickel and diming. The staff conclude that the PI needs counseling on penny wise and pound foolish.

AG Network

Z41A has severe drifting problem. IRIS packed the STS-2.5 in sand to add thermal mass to stabilize. Given the existing insulation and burial, it seems unlikely that thermal instability is the cause. Nevertheless we'll try packing it in sand and simultaneously installing a standalone temp recorder. If the problem persists, we'll have data to show how much the temperature is changing.


The fdl is getting new AC.

The FDL wiki is here:


The seisnet group on umdrive is at You will need your uuid and password.

The seisnet wiki is at You will need your uuid and password.