在二者的图形显示界面的数据信息栏中，CLASSIC会标识数据来自阿雷西博射电望远镜，但BOINC就没有标明。这是不是说明目前在BOINC上进行的已经不是阿雷西博的数据了？

数据源还是一样的，虽然没标出来：）

好像都是03、04年记录的信息

不知道澳大利亚的那个天文台现在是不是已经开始SETI信号收集工作

SETI 澳大利亚中心网站 详细介绍
http://www.equn.com/forum/viewthread.php?tid=4515

Okay. I must have answered this in three other threads pertaining to this same topic already. But perhaps let me add a little more info this time that may shed light on the '03 data.

Data tapes come from Arecibo and end up in a pile next to my desk. We have, on average, a backlog of about 6 months' worth of tapes to split into workunits. There's no care taken to keep these tapes in chronological order (there's no need to, and there's better things to worry about). When it comes time to make more workunits, I grab a random tape.

This stuff I already mentioned elsewhere. BUT! There's more: We do actually check the quality of the data before throwing it into the splitter - we don't want to make a bunch of workunits with excessive RFI, or machine noise because the telescope was under maintenance, etc. Basically every two hours we compare the current spectrum we are recording against what we'd expect to see, and if it's WAY off, we probably have garbage data (so WAY off that we are positively not throwing out ET signals but obvious earth noise clobbering the relatively quiet noise from space).

Back in 2003 we had our large backlog of data, so we had a chance to be more selective with our tapes, not splitting anything that had the chance of being bad data. So a lot of 2003 tapes never made the cut at that time. Since then, we have determined that perhaps we were being a bit too selective - some of the data checks were failing the same time every day (perhaps this was a reflection of sun position affecting our receiver - I'll leave that up to the real scientists around here to decide). I was also cutting tapes when it failed a data check 1 time out 8, thus "throwing away" 87.5% of good data because 12.5% seemed squirly.

But of course we keep these tapes around, so this data wasn't actually thrown away - just settling to the bottom of my data tape box for later reconsideration.

That's all.

- Matt