Tech Staff Meeting Notes November 26, 2012
The top priority is always repair of down stations.
NM problem stations
ET problem stations
Duty Table updated May 2012
Work on CERI Bylaws will be in the spring
We're acquiring two more refteks, and several more ISIS3 packages.
We're scheduled to decomission the Bayou Corne array in January. All work needs to be completed prior to contract expiration on 1/31.
Several servers rebooted about 5 minutes after 9am local on November 19. Jim reports that the logs showed a frequency error. Need to monitor next xfer on December 3.
NMAD: 3 ISIS and 0 bb
SP: CHRM, EPRM, and NWCT
MKTA: 12 ISIS and 2 bb
SP: BFAR, DLAR, LVAR, MSAR, RVAR, LRAR, NHAR, QUAR, TMAR, BVAR, TWAR, and NFAR
BB: HBAR and LPAR
EDIT, NNAR & CHNM: NNAR and CHNM will be redirected to transmit directly to the node instead of through EDIT.
NHIN (appears to be internet problem)
TMAR.EHZ and .EHN - see image
Arkansas Network Problems
FCAR - down (stolen batteries)
WLAR - drifitng
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.
GNAR drifted dramatically when the weather got cold over Thanksgiving break. A recenter temporarily fixed it. Get your shovel ready Dave, we need more insulation around the vault.
Jim is getting a quote to replace the muffler, exhaust manifold, and vaporizor solenoid.
Mitch needs to modify env_alarm to monitor the ACFA channel. It is no longer a simple binary on/off voltage but rather contains pulses that indicate the status of the 3-phase AC power input.
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.
Visit to WKNO tower on south campus was good. The building is URM so we want to minimize our footprint inside. There isn't a good telemetry shot to CERI so we'd need to move the ceri node (e.g. mudworm and associated rack, dbb firewall, etc) to the tower. Mitch is checking with ITD about bandwidth.
Jim asked about the feasibility of putting a 100 foot freestanding tower on the CERI campus. Hardware should cost around $7k if we do it ourselves. We'd need a bigger jin pole. Mitch will check. Steve suggested we start with the Vice Provost for Research.
MCAR is the only remaining station coming in via gcf2ew on anssworm. MCAR loses its connection a half dozen or so times per day.
Replace foam rubber plugs at all year 1 stations (need to notch it to accomodate the GPS pods): ASAR, CBHT, CUET, MCAR, SFTN.
CVVA. The saga continues.
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.
Heli's for 1 channel per granite are running on shakeworm and accessing aztnworm. Recorders 3 and 5 have no data at aztnworm. Recorders 1 and 2 have very poor completion. 4 is not bad but still has periods of no data. 6 and 7 have lots of gaps. How much of this is telemetry to aztn and how much is low bandwidth on the aztn dsl? See http://folkworm.ceri.memphis.edu/heli/heli_hdbr/
SMNC - dropping out and spikes
TVNC - gain channel problems -see image
RBNC - spikes
Strong motion problems
CSTN - gappy
Strong Motion down
CVVA no internet
Generator is not functional despite EMA's effort to repair. Consider additional battery for starworm.
BHT move. We may need a written MOU with the Catoosa WMA so John gave them the one we did with TDEC as an example. New site on Pilot Knob Mtn. is about about 9 miles to the E NE. The new location does not have a path to Star Mountain but we do now have hardware for the digital upgrade (a Basalt). John obtained permission to install a repeater at the sheriff's office in Wartburg. Was this where we get internet?
RBNC and CCNC need new radio pairs.
Battery backup is reinstalled but there is still a problem. Currently has only an Off the shelf UPS.
Central Receive: Still have interference. John is scheduled to meet with the engineer for the radio station this week. If he confirms we're being interfered with, then BRB will ask the ham operator to fix the problem or power down.
WSNC: Fixed transmitter but had to pull the sensor to repair the E-W channel.
MTTN Node ASTN: Change to AC power. We have permission and can install anytime.
PIGT down. Chris is headed there this week.
Initial install complete. Need to wrap up loose ends and vett the data.
WLAR has large latencies and poor internet connection. Something odd is also going on with the Reftek and it may be losing power or cycling. Works fine with no outages when the reftek is operating at the VC connected directly to the router. So the problem must be between the station and the router.
Chris is looking for suitable bags to protect CMG6TDs during burial. First experiment with a bag under water failed.
We have several bad CMG-6's. Should they go Guralp for repair? Who pays for it?
Pulled the 6 CMG-6's borrowed by NELE. Need to do a huddle test.
NSMP Station List.
Chris repaired 5 stations.
The seisnet group on umdrive is at http://umdrive.memphis.edu/mwithers/seisnet You will need your uuid and password.