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R/Sir Thanks a lot Sir for a very helpful mail and a very quick reply....... The other thing is how to correlate bands of different resolutions with coordinate variables. My Navigation is in the form of lat/lon disks which is at 4 km resolution. While I have bands at three different resolutions namely 1 Km, 4 Km and 8 Km. What could be the best way to get the things in place? Will I have to create lat/lon arrays for three different resolutions. That will occupy of extra space. Are there any cell methods to correlate the bands of different resolution with same set of navigation information. regards Ghansham On Fri, Apr 27, 2012 at 12:59 AM, Martin Raspaud <martin.raspaud@xxxxxxx>wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On 26/04/12 04:41, ghansham sangar wrote: > > R/Sir > > > > Are there any sample CF complaint satellite L1B (swath) > > multi-spectral datasets that demonstrate the way we put the band > > information along with their wavelengths and calibration > > information. There can be more than one calibration attached to a > > single band (like radiance and brightness temperature attached to > > IR channels). > > Hi Ghansham, > > I don't have any such data, but I guess we could do something like: > > > short ImageData(band, x, y); > ImageData:coordinates = "band lat lon time wavelength"; > ImageData:valid_min = 1s; > ImageData:_FillValue = 0s; > ImageData:missing_value = 0s; > ImageData:add_offset = 34.02f, 35.02f, 36.02f; > ImageData:scale_factor = 1.54f, 1.64f, 1.74f; > ImageData:radiance_formula = "ImageData * radiance_factor + > radiance_offset"; > ImageData:radiance_factor = 2.08f, 2.09f, 2.10f; > ImageData:radiance_offset = 0.3f, 0.6f, 0.9f; > ImageData:brightness_temperature_formula = "bt_offset + radiance * > bt_coef1 + radiance^2 * bt_coef2"; > ImageData:bt_offset = 1.0f, 1.5f, 1.8f; > ImageData:bt_coef1 = 2.0f, 2.5f, 2.8f; > ImageData:bt_coef2 = 3.0f, 3.5f, 3.8f; > > Maybe we should add something like formula_terms also ? Or is there > something more general to describe formulas ? > > Best regards, > Martin > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v2.0.14 (GNU/Linux) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ > > iQEcBAEBAgAGBQJPmaIUAAoJEBdvyODiyJI4krAIAL9pqt5Rs5JqyumUVliNKXqX > cceRvzCi9p5KK0trp1tFJaYZzSQS74M++ntMlzKZJpXDRSnlO61eRbT+NNNia/fI > sYgErE/msr3oQO3NDZ/p8i1l8sIrOaM1lkxeOxRaCXFlB4spXDllsNMefNv5lKoW > 5NWhBzeRIKCAakxJZ8PZaYYB1sRJlx25BelwkxgAowpo6mow/Ci1jEVIUyFQesPx > x7dJx8qtPuOFgnmBEolxcY7svuk7zN3D/1p2E+i04fvh1pnCz3d++zl+WujNfimm > suyfgp2J/z4Z9RPNJFxWKIW9nK1k73udddWzj5gBNdtrckL42NlX9yjxDDCydQE= > =s+37 > -----END PGP SIGNATURE----- > > _______________________________________________ > cf-satellite mailing list > cf-satellite@xxxxxxxxxxxxxxxx > For list information or to unsubscribe, visit: > http://www.unidata.ucar.edu/mailing_lists/ > >
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