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On 16/08/12 06:39, ghansham sangar wrote: > R/Sir > > I have a query related to something scanning direction. > Are there any conventions in CF that denote in which direction the scanning > is happening. > Generally all the geostationary and POES satellites scan along the latitude > lines. > But there are some satellite specially designed for tropical region where > we see that they scan along > the longitude lines. Are there any ways to denote that. I think if it is > not there, then we should include > them somewhere. Hi Ghansham, I agree with you, this should be specified. One way to specify this in the geostationary case is to use the soon to be added "geostationary" projection definition (see here: https://cf-pcmdi.llnl.gov/trac/ticket/72 ) However, this doesn't entirely solve the direction issue, as an instrument might scan from right to left or left to right (or both), which might be important to know in some cases. Maybe this could be an attribute to the data (eg "scanning_direction") or even a flag for the cases where several directions are used ? Ideally, one could specify the time of capture for each sample, but that might be overkill (and occupy unnecessary space). Best regards, Martin
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