Search found 4 matches

by rs937
Mon Feb 03, 2025 7:04 pm America/New_York
Forum: Home
Question: MODIS L1B Offsets
Replies: 4

Re: MODIS L1B Offsets

I apologize if I may be a bit confused, but isn't L the calibrated TOA spectral radiance? I am not sure I understand how Lmin can be negative.
by rs937
Mon Feb 03, 2025 3:25 pm America/New_York
Forum: Home
Question: MODIS L1B Offsets
Replies: 4

Re: MODIS L1B Offsets

Thanks very much for your response. I should have mentioned that the positive offset values I am seeing are both for Emissive and RefSB bands. If Lmin can be negative also for RefSB, then it would make sense that I am seeing all radiance offsets to be positive.
by rs937
Thu Jan 30, 2025 10:15 am America/New_York
Forum: Home
Question: MODIS L1B Offsets
Replies: 4

MODIS L1B Offsets

Hello, The Equation 5.10 of MODIS Level 1 User’s Guide (MODIS Level 1B Product User's Guide) implies that the radiance_offset parameters are by definition all negative. However, the parameters I obtain by using either HDFView or using MATLAB’s hdfread, for many different sets of 1 km L1B data, are a...
by rs937
Thu Jan 30, 2025 8:46 am America/New_York
Forum: Home
Question: The information provided at MODIS specification website
Replies: 1

The information provided at MODIS specification website

Hello, The MODIS specification website (MODIS Web) provides a table that has specific information for each band. I have two questions regarding the information that is in this table: 1) Column 4 provides a spectral radiance value for each band, but it does not explain what these values represent. Si...