[GRASS-user] question on Stray light Landsat 8 data

[Nikos Alexandris]

* Gabriel Cotlier <gabiklm01 at gmail.com> [2018-08-21 12:00:24 -0300]:

>I would like to ask if nonetheless the effect due to "stray light" the
>*i.landsat8.swlst* code for split window is still applicable to Landsat 8
>data and whether these error is specially visible on water bodies?

The implemented algorithm (Du, 2015) bases upon the generalized
split-window algorithm proposed by Wan (2014). The 'stray light' issue
is not dealt upfront with this approach.  The 'stray light' issue is
dealt with an algorithmic correction introduced in the Collection 1
products.  And, of course, there might be more questions that relate to
the quality and performance of the algorithm by Du.

Regarding "water bodies", I don't know.


>whether band 10 is better than band 11 in terms of correction processing
>for Level -1  data products?

Band 10 is the one selected for the single-channel based LST products
that span across all Landsat sensors. See: "Landsat Provisional Surface
Temperature (ST) Digital Object Identification (DOI):
doi.org/10.5066/F7J38RTH".  Band 11 is the one with large calibration
uncertainties.

A good reference is this publication:

Malakar, N. K., Hulley, G. C., Hook, S. J., Laraby, K., Cook, M., &
Schott, J. R. (2018). An Operational Land Surface Temperature Product
for Landsat Thermal Data: Methodology and Validation. IEEE Transactions
on Geoscience and Remote Sensing, (99), 1-19.
http://dx.doi.org/10.1109/TGRS.2018.2824828.

Nikos