Dear Seiji,
As we discussed at the FDSN WG1 meeting, I would like to propose more FDSN backbone stations from the GSN. I have included the Inventory spreadsheet with an additional column (column E) which denotes the status of the station as a backbone station. We had the discussion at the WG-1 meeting that the asterisk next to the station ID is difficult to parse. I've taken a stab at creating a backbone column. In this, I've marked those stations previously identified with an asterisk with the symbol "Y" as being accepted backbone stations. Please note that several of these stations are now closed (marked with a "C") and several stations are duplicated (marked with a "D"). The current totals for these stations are as follows:
Current existing backbone stations: 168
Closed backbone stations: 29
Duplicate listings: 62 (result of marking the station multiple times to represent different instrumentation epochs).
I've marked those stations I would propose as new backbone stations from the GSN with a "PBB" label in that column (Proposed BackBone). Currently, there are ~130 existing core stations in the GSN, not including affiliated stations. Of these, 24 or not included in the FDSN backbone and I proposed that these be added. I've added another worksheet titled "Proposed Backbone - GSN" that describes the stations I put forward for your consideration. The additions to the FDSN backbone were to consider geographic distribution, availability of data, and data quality. All the proposed stations are from the existing GSN which is, by definition, globally distributed. Most of the proposed additions to the backbone are in very remote areas, providing vital geographic coverage. In a few cases (stations in the US), these stations are in the East-Central US which is more sparsely covered than the Western US and all are STS-1 - high quality stations. All data are available in real time, and are regularly reviewed for quality as a part of the GSN quality assurance system and through metrics calculations made at the IRIS DMC. All data are freely and openly available in real time, including metadata and quality metrics.
If accepted, this would bring the existing FDSN Backbone to 192.
Thank you for your consideration and please let me know if you have any questions.
Best regards,
Kent
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Kent Anderson
Program Manager - Global Seismographic Network
Incorporated Research Institutions for Seismology - IRIS
(505) 228 3082
On Jul 30, 2013, at 9:10 PM, Seiji Tsuboi wrote:
Members of FDSN WG I on stations
Some of you have received this email because you have attended the FDSN WG-1 meeting in Goteborg. I assume that you agree to be included this mailing-list but if you do not, please let me know.
Attached please find a draft for minutes of WG-1 meeting on July 22 in Goteborg. Please check the file and let me know if there are any changes to be made on this draft.
I still welcome the updates for FDSN station inventory. Please send me the updated inventory in Excel spread sheet.
We have agreed that we will increase the number of FDSN backbone stations. Please send a proposal for new backbone stations with station list to this mailing-list. If there will be no objection to the proposals, we will include these proposed stations in the inventory as backbone stations.
Thank you very much.
Seiji Tsuboi
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Seiji Tsuboi
Kent Anderson
Eleonore Stutzmann
Damiano Pesaresi