Ted Molczan wrote: > Last August, I initiated a discussion regarding policy options for reporting high resolution ground-based imagery of > Earth satellites to SeeSat-L: > > http://satobs.org/seesat/Aug-2010/0134.html At that time I gave my opinion that raw data should be required, but I caught so much flack from others about it that I backed off. In light of Thierry's excellent commentary which is backed with factual evidence, I now go back to my original position that raw imagery data should be provided. Hopefully my arguments below will generate reasonable discussion, flack free. It's much like someone reporting orbital elements without providing the position reports that resulted in that TLE. How do we resolve 5 different people posting 5 different TLE's for the same object? How do we know a mistake hasn't been made? And I do recall a few corrections being posted on this list from time to time. Mistakes happen. No big deal. But by sharing the raw information, mistakes can be caught, and all can learn. Further, it allows an analysis from multiple sources of data. A TLE developed from the reports of 5 individuals will be more reliable than 5 independent TLE's. Although it appears the reporting of imagery observations is still in it's infancy, it will only grow. Eventually we may have a sub-group here that specializes in imagery of, for example, classified satellites much in the same way as we have now those who report their positions. In the end it will be much better as a whole when folks have access to the raw imagery from multiple sources in order to form a, pardon the pun, a much clearer picture of what we are looking at. To put it more bluntly, since there are questions being raised regarding the results of analysis of imagery, the only way to alleviate that is to have independent analysis done, and that can only be done with access to the raw data. I think we could call this a form of "peer review". Further, since the purpose of this list is to formally report observations and data, the raw images and enhancements (analysis) are a form of data. Any arguments regarding ownership and copyright status of the images will need to be dealt with. To that end I propose that any imagery officially reported to this list be required to come with a statement to the effect that such imagery is being released to the public. There are many existing licenses already in existence which may be applicable, for example copy-left, or maybe a specialized one for this list can be developed. By way of example, are those who report PPAS data going to assert ownership and copyright over the data they report to this list? If a person is unwilling to agree to the terms then they simple must choose not to post. I am familiar with issues regarding imagery copyright, as I am in the process of growing a photography/graphic arts business. There are many web sites I have looked into for selling my work. Some I hove chosen NOT to use because I cannot agree with their terms of service. Others I do choose to use because they respect my rights as owner of the imagery. Admittedly, this is a quite different form of publication than would be applicable to this venue. In my case, I am doing the work for profit. In the case of SeeSat imagery, it is scientific data. Finally, an issue I see regarding imagery as data is, where the data is stored. Right now those who have posted to the list about imagery are only providing links to their own websites, whereas those who report position observations do so as text and it becomes archived in this list as raw data. The imagery does not become part of the archive. It is my suggestion that if imagery data is to become an official part of SeeSat, consideration needs to be made to having some form of independent archive of this imagery. In other words, the images need to be uploaded to SeeSat (or some official SeeSat image hosting account) rather than kept all over the web on personal websites, which may not be reliable as websites can come and go, or whose contents may be in flux. Brian -- http://www.skywise711.com - Lasers, Seismology, Astronomy, Skepticism Seismic FAQ: http://www.skywise711.com/SeismicFAQ/SeismicFAQ.html Quake "predictions": http://www.skywise711.com/quakes/EQDB/index.html Sed quis custodiet ipsos Custodes? _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-l
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