Tech Staff Meeting Notes June 12, 2012

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

Duty Table updated May 2012


News & Highlights

The Fish Fry will be Friday, August 31, 2012.

Middle TN Station

Mitch ordered the Reftek, T120, and a Nanometrics Titan accelerometer. Jim ordered most of the other parts. Chris is searching for a suitable site somewhere north of Nashville and south of the KY border. Priorities are stable comm and seismically quiet. We're not sure which radios to get until we have a permission and know the details of the telemetry. So Jim will get a pair of radios that can be used by the seisnets, then when the know the details of the Middle TN stations, the seisnets will get the appropriate radios. Gary got Chris in touch with Bill Cooper from TEMA for a potential site. He says its a 250 acre, fenced TEMA facility off Foster Avenue. He remembers some new one story buildings on the Foster campus housing some of their IT staff in new one story office buildings. And they were right next to a big open and quiet field. Chris is following up.


Short Period & Broadbands

EDIT, NNAR & CHNM: NNAR and CHNM repeat through EDIT and the received signal is very bad due to trees. NNAR and CHRM are very noisy and fade out quite a bit. EDIT is now located in the Chicksaw National Wildlife Preserve so cutting trees is not an option. There isn't a clear path to a repeater on the Edith forest tower either. Need a new plan (maybe go directly to the node?).

WALK: Chris and Manning were unable to reach WALK up in the KY bend. Mr Lynn indicated that the station was completely underwater but it is still up? (yes still up).

Dynamic NMDown list

See figure


Unk Problem

Isis Oxidation

Muted Amplitude

Strong Motion Stations Down

Mag. 4.0 gain range problems
These stations had problems with the gain channel during the Magnituded 4 Missouri event on Feb 21, 2012. It isn't clear to me whether they data channels saturated or whether there was excessive chatter in the gain channel. See image.

HTAR coax problem.

Weak Battery/Solar There were 10 stations down for this event. I'm guessing that for a majority of them it was just the battery. Chris fixed 4 of them. HCAR was flooded and HTAR is a likely coax problem. The remaining 4 are listed
The of those four were upgraded to isis3. Need to check LVAR.

NODE Tasks




Jim is getting a quote to replace the generator blockheater, muffler and exhaust manifold, and vaporizor solenoid.

Mitch needs to modify env_alarm to customize for lnxt generator alarms:

Here are what the new Lenox node status alarm channels will be when the new generator interface module is installed. As was the case before, all outputs are normally high and go low to indicate an alarm condition. High is defined as +2.5 VDC or approximately +1024 counts.


G and D and the local EMA installed a 25kW generator to power that side of the building. If there's room power-wise would they let us power the rack from it too? We could share the maintenance of the generator. We'd also have to install a transfer switch.



Twisted pair from Richardson is extremely noisy causing problems with the analog backbone. Richardson is also on the UM 5-year capital improvement plan to be replaced. We got a tour of Wilder and its doable. We need to see if we can get a path to CERI so we know whether we just need to move what's on Richardson now, or whether we need to turn Wilder into an entirely new node (i.e. new mudworm). Then we can get Planning to help us with a design and then we can get permission.
We could just move the firewall from 3904/218 to Wilder and get the DBB on the campus internet that way (if there's no aironet line of site). There are good telephone pairs from from the Wilder roof to the basement and we could move the ceri node/mudworm to the basement. Otherwise we'd have to find and trust connections between the basement and CERI.

We have line of site from the southeast corner of 3904 except there are powerlines in the way. Can we put up a tower on the east side of 3904 to get over the trees and power lines on central?


Ownership, Operation, and Maintenance of the four Charleston, SC stations (C1SC, C2SC, ADSC, and TRSC) was turned over the Univ. of SC at Columbia. At Phillip's request, we letting the data flow through CERI for the time being. Eventually it will get switched to Columbia and the network codes will then change from NM to CO.

RDST, CBHT, and MCAR are coming in via gcf2ew on anssworm. CBHT occassionally loses its connection but is overall, ok. MCAR loses its connection about twice as much so while its mostly functional, it should be better. At RDST, a datapacket sneaks through a couple times per day--it needs an end to end internet checkup.

Replace foam rubber plugs at all year 1 stations (need to notch it to accomodate the GPS pods): ASAR, CBHT, CUET, CVTN, HDBT, LNXT, MCAR, NAIT, SFTN & TUMT.

NAIT: Couldn't get the NWS cable modem to cooperate at NAIT (firewall?). Dean was going to ask Comcast about it and maybe get a new modem. Steve will follow up.

CVVA. John contacted DMME again. He's also looking into the possibility of a freewave link to UVA.

We need a single document (access database excel spreadsheet) to document information on all freefield strongmotion stations to include contact(s), current IP's(eternal/external), what ports are allowed in from what IP's here at CERI, telnet yes or no, trigger levels etc. etc.



Bad CMG5 E/W.

Not getting broadband feed.


Replace two bad mss100's.


GTTN move is waiting on Mr. Philyaw to schedule a crew to move hardware. He will contact John when he does.

Dynamic ETDown list


Unk Problem
BCRT- horizontals amplitude is smaller than vertical
SWET- drifting horizontals and glitches on all channels.

Strong Motion stations
CVVA- no internet
CSTN- still gappy
CPRT.HN* - interference -glitches on all channels

Only the DYTN upgrade remains. See map.
Agreement is complete: clear to launch.


BHT move. John has a verbal permission from the Catoosa WMA to move it about 9 miles to the E NE to Pilot Knob Mtn. This likely will need to be a written permission. The new location does not have a path to Star Mountain but we do now have hardware for the digital upgrade (a Basalt).


Central Receive: Still have interference from the ham operator. John will pursue this with the FCC.

TRYN: New tower and building are in place, O.K. to install anytime.

WSNC: Fixed transmitter but had to pull the sensor to repair the E-W channel.

CMGA: need to camp out with a spectrum analyzer to identify the interference.

MTTN Node ASTN: Change to AC power. We have permission and can install anytime.


We need a better plan for end-to-end O&M of the GPS network in the post JPD era.

I40 Bridge Upgrade

Granites are on a 192 network. Steve is setting up a worm to pull data over the wireless and do an end-to-end test for two weeks prior to installation.

The rotation sensors leaked. PMD no longer makes them and isn't willing to repair or replace. New sensors are not in the budget.

HDBT enclosure is reinstalled.

There is about 50' of water in the 100' borehole. The sensor package leaked and is now trashed. It is not repairable and there's no budget for a new sensor.

CMG5TD is ready for installation at HDAR. Need to reinstall hardware for link to AZTN.

AG Network


Chris is looking for suitable bags to protect CMG6TDs during burial. First experiment with a bag under water failed.

What equipment in the FDL is no longer needed. Mitch will call a meeting of FDL users to discuss culling the equipment. Also, the check out/in process is largely ignored--what system could be implemented that people will actually use. Jer Ming is having trouble with some of the old equipment.

We have one bad CMG-6 Should it go Guralp for repair? Who pays for it?


NSMP Station List.

Paris Tn plan a visit whem looking for Middle tn Site.


New door locking scheme got delayed.

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