Heatwave Detection in Bangkok, Thailand about earthengine-community HOT 4 OPEN

I think this is great, @pinkychow1010 - thanks!

An initial comment - I wonder about using VIIRS LST instead of MODIS LST though... since MODIS will be decommissioned at the end of next year. I think this is roughly the equivalent VIIRS LST data: https://developers.google.com/earth-engine/datasets/catalog/NOAA_VIIRS_001_VNP21A1D

What do you think?

https://www.earthdata.nasa.gov/learn/articles/modis-to-viirs-transition

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Thanks for replying, I have a look into the dataset and I have two concerns about the VIIRS LST data. First, I found the latest data is only available until 01 Mar 2024, so a large time gap, making near-real-time monitoring not possible.

Secondly, I run the algorithm using VIIRS data, and while the MODIS LST (I am looking at Bangkok) match well with the weather data online, VIIRS give me at least 10 degree higher than the records... making the results of detection highly implausible. I am not aware that the VIIRS LST need any offsets, so I do not know yet why is it the case.

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Okay, thanks for looking into VIIRS as an alternative. I think you should continue with MODIS and in the text, just mention something like:

"When MODIS data becomes unavailable, VIIRS offers a viable alternative, but the algorithm may need adjustments to accommodate sensor differences."

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Thank you for your response. I will do so.

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