Below is given the data policy applied for the duration of the project. This states that after the end of the project the gas emission data in the archive should be made public after a delay of 1 month unless otherwise agreed between the network administration and the Observatory.
In practice the emission data that is presently in the archive is inconsistent and in many cases erroneous. This is due to the fact that in order to derive accurate fluxes local meteorological conditions have to be applied. The source of this meteorological data as well as the way it has been implemented varies strongly between the volcano observatories, causing a large inconsistency between the datasets and in some cases serious errors. The way data has been screened for quality control also varies strongly between the datasets. For this reason a re-evaluation of the whole dataset is undertaken, applying meteorological data in a consistent way and making a screening of the data for improved quality control. This re-evaluation is expected to be completed by the end of 2012. After this date all the volcano emission data collected during the project will be made publicly available, via this homepage as well as via other data sources as WOVO-dat and GEO. For access to data from a specific volcano before the dataset is completed you are suggested to contact the NOVAC partner in charge of the measurements from this specific volcano to discuss the status of that specific dataset.
Also for data collected after the end of the project (31 March 2010), as well as data collected by new partners an open data access policy is applied in line with the general data policy agreed under the GEO-initiative;
(http://www.earthobservations.org/geoss_dsp.shtml). The ambition is to provide data after a 1 month delay, unless otherwise agreed. Also these data are presently being re-evaluated and are thus not yet available within this timeframe.
Project data policy
Spectra are recorded at the observatories, and evaluated in real time for risk assessment. In addition the local observatories will exploit these data for local geophysical research (correlation with seismic signals etc) and to make estimates of gas emissions from the actual volcano.
Evaluated data (SO2 and BrO emissions) are provided to the network in close to real time (the goal is real time with continuous internet access). These data can then be exploited by the partners for making global emission estimates, large scale geophysical correlations etc.
In addition raw spectra are provided to the network. Because of the large data volumes involved, this may be done with a more relaxed time-schedule, typically on a monthly basis. In case of extraordinary geophysical or atmospheric activity (volcanic eruptions, earthquakes, forest fires….) all means should be undertaken to provide at least a selected set of spectra on a daily basis.
All partners have full access to all data generated by the instruments, however practicalities may hamper the access in the beginning of the project until the network archiving routines has been established. To promote the network, gas emission data will be displayed in close to real time on internet. However, access to “hard data” is restricted to the network partners for the duration of the project. After the project has ended the observatories are still obliged to provide data as long as they operate the instruments. During this period also the “hard” gas data will be made available for the public and scientific community. However, unless the observatory agrees differently, a 1 month delay should be applied in order not to cause problems in case of a volcanic crisis. Accesses to the raw spectra are still restricted to the network participants. Of course all observatories are always free to share their own data with anyone they like.
Publications based solely on data from a specific volcano require an agreement from the observatory that has made the measurements. Publications combining data from several observatories are very welcome but all the involved observatories, as well as the NOVAC steering committee, should be informed about the intentions. In case of conflicting interests the steering committee decides who should write the paper. All publications and presentations based on data from the actual instruments should clearly refer to the network and when practically possible joint authorship should be offered all contributing institutes (no problem with the present size of the network, but may be a problem if the network expands substantially).