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| groups:homestake:meetings:20160714 [2016/07/14 11:22] – mandic | groups:homestake:meetings:20160714 [2016/07/25 22:44] (current) – mandic | ||
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| * Homestake array status | * Homestake array status | ||
| * RR cabling issue: probably rodent activity. Fix would most likely require replacing cables. | * RR cabling issue: probably rodent activity. Fix would most likely require replacing cables. | ||
| - | * WTP mass rail issue Gary suspects that the platform has tilted in one direction, so that the instrument is not leveled any longer. We would probably need to have a sensor ready just in case though. | + | * WTP mass rail issue. |
| - | * Do we need a maintenance trip asap? Cost roughly $20 per station per day, so next 50 days would cost us $2000, which is about the same as the cost of a trip to fix these. On the other hand, do we gain much from the extra 2 months of data from these 2 stations. | + | * Gary suspects that the platform has tilted in one direction, so that the instrument is not leveled any longer. We would probably need to have a spare sensor ready just in case though. |
| + | * Do we need a maintenance trip asap? | ||
| + | * Gary: Cost roughly $20 per station per day, so next 50 days would cost us $2000, which is about the same as the cost of a trip to fix these. | ||
| + | * Gary/ | ||
| + | * Decide not to worry about these two stations, our next trip to Homestake will be to decommission the surface stations in September. | ||
| - | * Planning the September trip to remove surface stations | + | * Planning the September trip to remove surface stations: |
| - | * have to leave each site in the state we found it. Have to extract the insulation from the vaults, and we have to remove the pole. The pole might be hard in some cases, in most cases just pulling one guy wire would do it (since they are shallow, may have to dig some more). A couple of sites may be harder since they are deeper - for them, may have to dig more and maybe hit the concrete. | + | * Vuk: have to leave each site in the state we found it. We have to extract the insulation from the vaults, and we have to remove the pole. |
| - | * Gary: could clean up up to 5 stations per day. But have to service the balers in parallel with this. And we have to check the orientation of the sensors, to get another data point. | + | * Gary: The pole might be hard in some cases, in most cases just pulling one guy wire could do it (since they are shallow, may have to dig a bit). A couple of sites may be harder since they are deeper - for them, may have to dig more and maybe hit the concrete. |
| - | * Also have to clean all of the equipment (remove mud etc), pack them into their boxes. We should ship them in December, along with all the others. | + | * Gary: could decommission |
| - | * We should allow a full week: arrive on Sunday and leave on Friday or Saturday. | + | * Also have to clean all of the equipment (remove mud etc), pack them into their boxes. We should ship them in December, along with all the underground equipment. |
| - | * Dates in September: Gary would prefer the second half of Sept. Pat OK. Daniel: weeks of Sep 19 and 26 are ok. Ross: will be taking classes, but could miss some. | + | * We should allow a full week for at least 3 people: arrive on Sunday and leave on Friday or Saturday. |
| - | * What about the tools: let's take inventory in Sept, and decide what to leave in the lab and what to ship back to UMN. | + | * Dates in September: Gary would prefer the second half of Sept. Pat OK. Daniel: weeks of Sep 19 and 26 are ok. Ross: will be taking classes, but could miss some. Vuk: teaching, but will try to join for at least a part of this trip. |
| + | * Pat: What about the tools at Homestake? | ||
| * Week of Sep 26 looks like the best choice. Follow up via email, Vuk will check with the lab. | * Week of Sep 26 looks like the best choice. Follow up via email, Vuk will check with the lab. | ||
| + | * Email from Jaret (after the meeting): | ||
| + | * Maintenance days: Sep 23,26 and Oct 7,10. The Lab also observes the Native American Day holiday on Oct 10. | ||
| + | * Tom's availability: | ||
| * Data analysis updates | * Data analysis updates | ||
| * Preliminary Love Wave Recoveries: {{: | * Preliminary Love Wave Recoveries: {{: | ||
| - | * Vuk: next step | + | * Vuk: next step would be to implement the actual Homestake array. Will have to worry about topography? |
| + | * Gary/ | ||
| * Vuk: how do we verify this algorithm with data? Maybe compare to other techniques? | * Vuk: how do we verify this algorithm with data? Maybe compare to other techniques? | ||
| * Gary: could look for noise from a nearby mine, there is a lot of activity there. But this is at higher frequencies, | * Gary: could look for noise from a nearby mine, there is a lot of activity there. But this is at higher frequencies, | ||