I have collected data (spectral bands) from Landsat 4-5 and Landsat 8. I was calculating NDVI when I noticed that the two Landsats have different band numbers designated as Red and Near Infra Red (needed for NDVI calculation).
When I checked the wavelengths associated with these bands at Landsat Band Description I noticed that the wavelengths also differ a bit.
For example: I used bands 3 and 4 (Red & Near Infra Red) from Landsat 4-5 and bands 4 and 5 (Red and Near Infra Red) from Landsat 8 for NDVI calculation, but the wavelength range of band 3 in Landsat 4-5 is not exactly the same as of band 4 in Landsat 8.
Is there any way to convert things so that they are same and comparable. I got big variances between NDVI values from the two satellites and have the idea that's because the wavelengths differ.