Forum

Hello！
I wonder where can i find the L3 level Rrs monthly product of Terra MODIS？

I wander where can I find the spectral response functions of GOCI？

Hi,The color matching function is involved in my research, which requires the spectral response function of SeaWiFs. May I ask where I can find it?

Thank u very much!
Comet

I still don't quite understand how this data should be used. After I opened it with Matlab, the value of Lt*0.02 was very small. I want to know how to use HICO's L1b Lt (atmospheric top radiance data). What is the problem that caused the low value of data? Because I see that the program about true c...

I am not sure if my reply has been sent, because it is not shown on my side. Here is my reply (Wed Nov 24, 2021 9:32pm America/New_York) : Does HICO's L1b data include （Lt *0.02） as radiance? Are there any other steps needed to process the data? I chose a scene with cloud HICO data (H2010304222425.l...

Does HICO's L1b data include （Lt *0.02） as radiance? Are there any other steps needed to process the data?
I chose a scene with cloud HICO data (H2010304222425.l1b_iss.nc), and the maximum value of Lt is only 26.2140. Is it my method of data processing wrong?

Thanks again for your kind help！
Comet

Hi Alicia, Many thanks for your answer ! I have checked your reply and realized that Lt in HICO's L1b data is not reflectance data but radiance data. I choose one scene with cloud image,the maximum Lt (Top of Atmosphere radiance) of it was 26.2140.Since I need to use HICO and MODIS data in my resear...

Hello！Recently, I am using HICo to do research on true color image synthesis, which requires 70 channel data between HICO 380-780. The L1 data of HICO is downloaded and Lt (top of atmosphere) data is used. I found that many reflectance data were greater than 1, and even reached 7.96. May I ask what ...

Hi Sean,

I would like to ask again what is the band width of Hico? The use of spectral response functions involves λ1 and λ2 in different band ranges. I checked the website and only said "sampled at 5.7nm". Is 5.7nm the band width or the central wavelength interval?

Thanks,
Comet

Hi Sean, Many thanks for your detailed answer ! I wonder what is the difference between the 'Relative Spectral Response'(RSR) and 'Spectral response function'(SRF) ?I looked at the MODIS spectral response function,Each band corresponds to a filter response.But I checked HICO's RSR, its size is 9000*...