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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
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fn:Martin Raspaud
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email;internet:martin.raspaud@xxxxxxx
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