The top priority is always repair of down stations.
NM problem stations
ET problem stations
We discussed remaining funds at the end of the network budget year on Jan 31. Jim will replace his leaky laptop and Mitch will likely purchase one or two 6-c centaur with titan systems.
The ATT 3G network is schedule for EOL in February 2022. We have three remaining ATT 3G cell routers. Two in the office ready for decommission and one installed at YH.WSCT. The HUD project has five unneeded routers. We will repurpose one of them and install at YH.WSCT.
Be sure to charge expenses for SLU adoptions to 2021 DM.
COVID-19 protocols in effect as of July 28:
Batteries at NM nodes are 5 years old and need replaced. MKTA and are NMAD done.
ISIS5 upgrades are complete. Two loose ends remain: Upgraded TYAR from ISIS2 to ISIS3 and replace the 3G cell router at HCAR with a freewave. CWPT is still operating and is on the abb. Mitch and Holly will decide on an abb replacement for it and then CWPT will be decommissioned.
MPHB continues to hang; it's an old serial to inernet DM24 system. The sensor hasn't been calibrated in three decades and has been in the borehole for nearly two of them. It is not being archived at IRIS and there is no metadata (Mitch has the original Guralp documentation though it is likely no longer accurate). We discussed whether to turn it off. It doesn't cost anything though isn't useful either. It is a nice borehole in a very noisy location so also not particularly useful from a monitoring perspective. It can be obsolesced as time permits.
WALK needs to move, Dave has a new site selected.
STAM needs to move. Landowner is prepping a new site for us.
HOVM has telemetry interference at the Luxora repeater. No good workaround. Convert it to digital.
NMDown
Data taken from:
/dat1/seisadm/Working/NM/202111/20211118_025240_MAN
/dat1/seisadm/Working/NM/202112/20211201_081617_MAN
Down
BLAR
TYAR
Misc Problems
CACT.EHE
HOVM - spikes-interference
DBB:
MKTA:
LNXT:
Repairs are complete on the money pit to the tune of $3600. We're now capable of operating at 85% which is ample for our purposes. Need to replace the feedline between the tank and generator.
NMAD:
AZTN/HDBR:
CERI:
NC is next up for digital conversions. These will all be Geobit/Trammel Links.
RCGA needs to move. John found a City Park in Chattannooga that is a former ammo dump. He's trying to get a permission to do a noise study to relocate the station into one of the bunkers. The city is willing to let us use the park internet.
TRYN needs to move to be upgraded to digital. John found a promising prospect at the Pisgah Astronomical Research Institute about 50 km to the west. PBO station P779 is also located there.
Replacement station for GTTN and RBNC needs a new plan. A cell modem would provide more options.
Our host at WSNC is having issues with their microwave link which provide us internet.
They are working on the problem.
ETDown
Data taken from:
/dat1/seisadm/Working/ET/202111/20211128_105920_MAN
/dat1/seisadm/Working/ET/202111/20211121_110400_MAN
Down
TRYN
WSNC.EH*
WSNC.HN*
Misc Problems
DYTN - data running behind almost every morning
GRBT - data running behind almost every morning
STAR Node
GRBT and DYTN are Tramell links to single radio at Star Mt. The signal fades causing outages in the morning. It isn't likely to get better. The DYTN path is long but solid. Is long and has obstacles. We can either switch DYTN to a 900M link or GRBT to a cell modem. A cell modem is preferred but Mitch would like an estimate for all stations likely to need cell modems so we can plan for the costs to the whole ET network rather than add them one at a time.
The PC is no longer needed at STAR except for SOH. But those weren't working when the crew was there last month for Centaur upgrades.
John will send the STAR SOH hardware to James to figure out how to send alarms.
Move PMTN due to excessive noise and vandalism. The new site, CATN, is permitted and ready to install.
HPNC Node
Convert all HPNC stations to digital using Geobits and Trammel Links.
MTTN Node Move the atom to the host's rack and remove our rack.
Bob has DM funding for new enclosures. He has travel and staff support but they need to be installed by the end of the GPS fiscal year on Feb 28, 2022.
Need to finish telemetry at Clifton. The current plan has it repeating off a cell tower to a school and onto public internet. We can considerably simplify the telemetry by using a cell modem. Mitch will propose a deal to have the seisnet pay the monthly cost of the modem in exchange for the radios he purchased.
Centaurs are in house. Upgrades for five AG stations will begin after the new year. There is also funding to replace the vault at Z41A.
FCAR has a borrowed T120. It also has a telemetry upgrade to do. It is also scheduled for a Centaur upgrade and all three will be completed when the hardware arrives from Nanometrics.
WHAR can be put back on the local network.
Permanent portables are becoming a problem. Stations in place more than 18 months should be installed using permanent station procedures to assure the civil works are capable of long term stability.
The FDL wiki is here: https://umwiki.memphis.edu/display/FDL/CERI+FDL
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.