I have downloaded some mod021km modis images and I want to work with them.

I want to know if these data need atmospheric corrections?

Perhaps something like FLASSH in ENVI or other methods.

I can convert hdf files using modis conversation toolkit and convert them to Radiance,Reflectance or brightness temperature but I don't know if it needs any atmospheric corrections before converting.

  • I have just downloaded MOD021KM file. When I open it in ERDAS IMAGINE the datum is missing. It is not geographically referenced. How can I fix this? With this image, I want to use radiance reflectance and brightness temperature with atmospheric corrections.
    – Sikandar
    Commented Sep 3, 2018 at 14:43
  • Sikandar, please ask this as a new question through GIS Stack Exchange. Thus, you will have much better chances to get an answer. It will be highly appreciated if you add a picture/code where it shows the datum problem.
    – Taras
    Commented Sep 3, 2018 at 15:11
  • If you have a new question, please ask it by clicking the Ask Question button. Include a link to this question if it helps provide context. - From Review
    – Bera
    Commented Sep 3, 2018 at 17:46

1 Answer 1


MOD02 needs atmospheric corrections, if you need surface radiance you can use atmospherics parameters of other modis products. But if you need surface reflectance you can download (MOD09).

Read this table for more information.

  • Thanks for your help..No I just want to work on them and in this stage I want to find a relation between amount of PM10 and DNs.. Commented Nov 11, 2014 at 14:12
  • Is there any manual about Mod01lkm data?The table you provided is about other modis products :( Commented Nov 11, 2014 at 14:29
  • you can read this resume of products (modis.gsfc.nasa.gov/data/dataprod/…), im looking for the data specifications, but i don´t remember where it is. What are you looking for?
    – Pau
    Commented Nov 11, 2014 at 14:45
  • or read this mcst.gsfc.nasa.gov/sites/mcst.gsfc/files/file_attachments/…
    – Pau
    Commented Nov 11, 2014 at 14:46
  • Thank you for your help.I just want to find some informations for mod02 products in case of atmospheric correction using FLAASH ..like FWHM for bands and etc Commented Nov 11, 2014 at 19:14

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