Earthdata Forum

When download MODIS/Aqua+Terra Global Flood Product L3 NRT 250m by the link generated automatically, it always failed.
{"message":"Unauthorized -- Please use reference #: f24dc94341e7be73893e9181f90966bb when contacting MODAPS Support","status":401}
And when I download in wget or Cygwin,it also error."Username/Password Authentication Failed"
I'm authorized exactly.

You are getting this error because you are not logged in to our nrt system. So, to download your files:
- Open a tab on your browser and go to:
https://nrt3.modaps.eosdis.nasa.gov/
and, log in under profile using Earthdata credential (UN and PW). Then go back to Earthdata search and click on the link and that should work.
Note, you must first login to nrt web site. Once you are logged into nrt web site, all downloads from Earthdata searches will work (until you close you browser or the nrt web site tab).